CN108502926B - BiOCl nano-rings and its synthetic method - Google Patents

BiOCl nano-rings and its synthetic method Download PDF

Info

Publication number
CN108502926B
CN108502926B CN201810460435.2A CN201810460435A CN108502926B CN 108502926 B CN108502926 B CN 108502926B CN 201810460435 A CN201810460435 A CN 201810460435A CN 108502926 B CN108502926 B CN 108502926B
Authority
CN
China
Prior art keywords
biocl
synthetic method
rings
nano
nanometer sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810460435.2A
Other languages
Chinese (zh)
Other versions
CN108502926A (en
Inventor
彭银
毛艳鸽
阚鹏飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Normal University
Original Assignee
Anhui Normal University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anhui Normal University filed Critical Anhui Normal University
Priority to CN201810460435.2A priority Critical patent/CN108502926B/en
Publication of CN108502926A publication Critical patent/CN108502926A/en
Application granted granted Critical
Publication of CN108502926B publication Critical patent/CN108502926B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G29/00Compounds of bismuth
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J27/00Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/06Halogens; Compounds thereof
    • B01J35/39
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B82NANOTECHNOLOGY
    • B82YSPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00Nanotechnology for materials or surface science, e.g. nanocomposites
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/01Particle morphology depicted by an image
    • C01P2004/03Particle morphology depicted by an image obtained by SEM

Abstract

The invention belongs to field of nanometer material technology, a kind of BiOCl nano-rings and its synthetic method are specifically disclosed, the synthetic method will be the following steps are included: (1) will contain Bi3+、ClHeating reaction is carried out with the aqueous solution of polyethylene glycol, obtains BiOCl nanometer sheet;(2) BiOCl nanometer sheet is etched in acid solution.BiOCl nano-rings can be obtained in synthetic method of the invention, not only filled up BiOCl nano-rings synthesis aspect blank, but also obtained BiOCl nano-rings compared with Traditional center not apertures BiOCl nanometer sheet have higher photocatalytic activity.Moreover, the synthetic method step is simple, easily controllable, obtained BiOCl nano-rings regular appearance, not only scientific research value with higher, photocatalytic applications value also with higher.

Description

BiOCl nano-rings and its synthetic method
Technical field
The present invention relates to nano materials, and in particular, to a kind of BiOCl nano-rings and its synthetic method.
Background technique
Fossil fuel in the links that we live all be it is indispensable, the non-renewable and reserves that gradually decrease are Also along with serious environmental pollution when being caused energy crisis, and being consumed.Currently, Photocatalitic Technique of Semiconductor is considered It is to solve the more promising technology of both of these problems.
In recent years, the controlledly synthesis of the new pattern of BiOCl and its photocatalytic activity research cause the great interest of people, main It wants the reason is that BiOCl is as important conductor photocatalysis material a kind of in bismuth based compound, by bismuth oxygen layer [Bi2O2]2+With it is double [Cl]-Sheath is alternately arranged along c-axis direction and constitutes unique layer structure, and this layer structure can be in [Bi2O2]2+Layer and [Cl]-The separation that internal electric field is conducive to photo-generate electron-hole pair is formed between layer, to have high catalytic performance.
But report at present it is mostly be BiOCl nanometer sheet, hierarchical structure patterns and their photocatalysis such as micron ball Activity.And cyclic annular nanometer sheet (also referred to as nano-rings) passes through because its center is easy to fluid, is on the one hand conducive to point of nano material It dissipates, convenient for application;On the other hand it also will increase and the contact area of the fluid containing pollutant, the property of promotion BiOCl nanometer sheet Energy.However, cause nano-rings synthesis difficult because material such as forward grows at the reasons to nanometer sheet in the synthesis process, it is therefore, existing at present Having technology does not have the report of BiOCl ring-type nanometer sheet.
Summary of the invention
The object of the present invention is to provide a kind of BiOCl nano-rings and its synthetic method, synthetic method of the invention is available BiOCl nano-rings have not only filled up the blank of BiOCl nano-rings synthesis aspect, but also in obtained BiOCl nano-rings relatively routine The heart not apertures BiOCl nanometer sheet have higher photocatalytic activity.Moreover, the synthetic method step is simple, is easy to control It makes, obtained BiOCl nano-rings regular appearance, not only scientific research value with higher, photocatalytic applications valence also with higher Value.
To achieve the goals above, the present invention provides a kind of synthetic method of BiOCl nano-rings, the synthetic method packets It includes following steps: (1) Bi will be contained3+、Cl-Heating reaction is carried out with the aqueous solution of polyethylene glycol, obtains BiOCl nanometer sheet;(2) BiOCl nanometer sheet is etched in acid solution;Wherein, Cl is provided-Substance be alkali metal chlorizated salt;Wherein, acid solution is that nitric acid is molten The mixed solution of liquid, sulfuric acid solution or nitric acid and sulfuric acid.
The present invention also provides a kind of BiOCl nano-rings synthesized according to previously described synthetic method.
Through the above technical solutions, the present invention has obtained BiOCl nano-rings, BiOCl nano-rings synthesis side has not only been filled up The blank in face, and obtained BiOCl nano-rings are living with higher photocatalysis compared with the BiOCl nanometer sheet of Traditional center not apertures Property.Moreover, the synthetic method step is simple, easily controllable, obtained BiOCl nano-rings regular appearance, not only have compared with High scientific research value, photocatalytic applications value also with higher.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is influence of the different time etching to BiOCl nano-rings: (a) the SEM figure of 3h etching, (b) SEM of 6h etching Figure;(c) the TEM figure of 6h etching;(d) different time etches corresponding XRD diagram;
Fig. 2 is influence of the PEG of different molecular weight to BiOCl nanometer sheet: (a) PEG-3350, (b) PEG-4000, (c) PEG-6000, (d) PEG-10000;
Fig. 3 is influence of the different acid solutions to etching BiOCl nanometer sheet: (a) HF solution, (b) acetic acid solution, (c) sulfuric acid is molten Liquid, (d) nitric acid solution;
Influence of the difference chlorine source Fig. 4 to synthesis BiOCl nanometer sheet: (a) KCl, (b) HCl, (c) CTAC, (d) NaCl;
Fig. 5 be different amounts PEG to synthesis BiOCl nanometer sheet influence: (a) 0.05g, (b) 0.1g, (c) 0.15g, (d)0.2g;
Fig. 6 is the photocatalysis analysis chart in application examples 1: (a) degradation curve of MO (10mg/L);(b) with BiOCl nano-rings When for photochemical catalyst, the UV-visible spectrum of MO solution;
Fig. 7 is the photocatalysis analysis chart in application examples 2: (a) degradation curve of MO (30mg/L);(b) with BiOCl nano-rings When for photochemical catalyst, the UV-visible spectrum of MO solution;
Fig. 8 is the photocatalysis analysis chart in application examples 3: (a) degradation curve of RhB (10mg/L);(b) with BiOCl nanometers When ring is photochemical catalyst, the UV-visible spectrum of RhB solution;
Fig. 9 is the photocatalysis analysis chart in application examples 4: (a) degradation curve of RhB (30mg/L);(b) with BiOCl nanometers When ring is photochemical catalyst, the UV-visible spectrum of RhB solution;
Figure 10 is the degradation curve of phenol (10mg/L) in the presence of the different catalysts in application examples 5;
Figure 11 is BiOCl nano-rings in application examples 6 to 10mg/L Photocatalytic Degradation of Methyl Orange recycling rate of waterused figure.
Specific embodiment
Detailed description of the preferred embodiments below.It should be understood that described herein specific Embodiment is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The endpoint of disclosed range and any value are not limited to the accurate range or value herein, these ranges or Value should be understood as comprising the value close to these ranges or value.For numberical range, between the endpoint value of each range, respectively It can be combined with each other between the endpoint value of a range and individual point value, and individually between point value and obtain one or more New numberical range, these numberical ranges should be considered as specific open herein.
The present invention provides a kind of synthetic method of BiOCl nano-rings, the synthetic method will be the following steps are included: (1) will Contain Bi3+、Cl-Heating reaction is carried out with the aqueous solution of polyethylene glycol, obtains BiOCl nanometer sheet;(2) by BiOCl nanometer sheet in It is etched in acid solution;Wherein, Cl is provided-Substance be alkali metal chlorizated salt;Wherein, acid solution is nitric acid solution, sulfuric acid solution or nitre The mixed solution of acid and sulfuric acid.
Through the above technical solutions, the defective BiOCl nanometer sheet in center can be obtained in step (1) in the present invention, by step Suddenly (2), the defective continuous expansion in the center of BiOCl nanometer sheet simultaneously penetrate, and obtain BiOCl nano-rings.The BiOCl that the present invention obtains Nano-rings have not only filled up the blank of BiOCl nano-rings synthesis aspect, but also obtained BiOCl nano-rings are not compared with Traditional center The BiOCl nanometer sheet of apertures has higher photocatalytic activity.Moreover, the synthetic method step is simple, easily controllable, obtains The BiOCl nano-rings regular appearance arrived, not only scientific research value with higher, photocatalytic applications also with higher are worth.
In the above-mentioned technical solutions, for Bi in aqueous solution3+And Cl-The ratio between the amount of substance, can in a wider range into Row adjustment, as long as meeting the requirement of above-mentioned technical proposal, can be obtained target BiOCl nano-rings.It is a kind of more excellent in the present invention In the embodiment of choosing, in order to obtain the defective nanometer sheet in center after step (1) and further obtain regular appearance BiOCl nano-rings improve combined coefficient, it is preferable that Bi in aqueous solution3+And Cl-The ratio between the amount of substance be 1:0.8-1.2.
Further, for Bi in aqueous solution3+Concentration, in above-mentioned Bi3+And Cl-The feelings that determine of the ratio between the amount of substance It under condition, can be adjusted in a wider range, in order to obtain the BiOCl nano-rings of regular appearance, improve combined coefficient, preferably Ground, Bi in aqueous solution3+Concentration be 20-50mmol/L.
Similarly, it for the additive amount of polyethylene glycol, can be adjusted in a wider range, it has been investigated that, with poly- second The increase of glycol dosage has various sizes of nanometer sheet to coexist, but the influence to the thickness and central defect of nanometer sheet is unobvious. In order to reduce synthesis cost, combined coefficient is improved, it is preferable that in aqueous solution: the Bi relative to 1mmol3+, the quality of polyethylene glycol Content is 0.05-0.1g.
In addition, can be adjusted in a wider range for the condition of heating reaction, regular appearance in order to obtain BiOCl nano-rings improve combined coefficient, it is preferable that it is 140-180 DEG C that the condition for heating reaction, which includes: temperature,.
Certainly, it for the time of heating reaction, can be adjusted in a wider range, in order to obtain regular appearance BiOCl nano-rings improve combined coefficient, it is preferable that the time for heating reaction is 8-15h.
Under the premise of acid solution is the mixed solution of nitric acid solution, sulfuric acid solution or nitric acid and sulfuric acid, for H in acid solution+ Concentration, can be adjusted in a wider range, in order to obtain the BiOCl nano-rings of regular appearance, improve combined coefficient, preferably Ground, H in acid solution+Concentration be 0.8-1.5mol/L.
Certainly, it for the dosage of acid solution, can be adjusted in a wider range, in order to improve reaction efficiency, it is preferable that phase For 1g BiOCl nanometer sheet, the dosage of acid solution is 100-600mL.
Moreover, it for etch period, can be adjusted in a wider range, in order to obtain the nanometer of regular appearance Ring, it is preferable that etch period 1-8h.
It is further preferred that BiOCl nano-rings of regular appearance in order to obtain, it is preferable that etch period 3-6h.
It for the operating condition of etching, can adjust in a wider range, surface can be used by the nanometer sheet in step (1) It coats the various ways such as acid solution, immersion to carry out, in a kind of preferred embodiment of the present invention, in order to improve etching efficiency and obtain To the nano-rings of regular appearance, it is preferable that the specific steps of etching include: by BiOCl nanometer sheet ultrasonic disperse into acid solution, hold Continuous stirring.
In technical solution above, for containing Bi in step (1)3+、Cl-It was formed with the aqueous solution of polyethylene glycol Journey can be adjusted in a wider range, such as can also will provide Bi directly by material dissolution in a water3+Substance, Alkali metal chlorizated salt and polyethylene glycol difference are soluble in water, then three is mixed, and can also dissolve, then remix two-by-two, Realize the present invention.Certainly for mixed process, the present invention is also not required, and can directly be toppled over, and can also be added dropwise, and can be achieved The present invention.
In more preferred embodiment of the invention a kind of, the defective BiOCl nanometer sheet in center in order to obtain, more into One step is conducive to obtain the BiOCl nano-rings of regular appearance, it is preferable that contains Bi3+、Cl-Pass through with the aqueous solution of polyethylene glycol Following manner obtains: alkali metal chlorizated salt and polyethylene glycol being pre-dissolved in water, ultrasonic disperse, is then added dropwise to predissolve and mentions For Bi3+Substance aqueous solution in, mix 20-40min.
Further, Bi is provided with dissolved with the aqueous solution of alkali metal chlorizated salt and polyethylene glycol and predissolve in advance3+Object The volume ratio of the aqueous solution of matter can be adjusted in a wider range, in order to obtain the defective BiOCl nanometer sheet in center, more into One step is conducive to obtain the BiOCl nano-rings of regular appearance, it is preferable that in advance dissolved with the water-soluble of alkali metal chlorizated salt and polyethylene glycol Liquid and predissolve are provided with Bi3+Substance aqueous solution volume ratio be 1:0.8-1.2.
In a kind of preferred embodiment of the present invention, in order to improve reaction efficiency, yield is improved, it is preferable that further include Product after heating reaction in step (1) is cooled down, the step repeatedly washed and dried with distilled water and/or ethyl alcohol.
In the above-mentioned technical solutions, those skilled in the art are for providing Bi3+Substance can be adjusted in a wider range It is whole, in order to further make raw material simple and easy to get, it is preferable that provide Bi3+Substance be bismuth nitrate and/or bismuth oxalate.
In the above-mentioned technical solutions, for alkali metal chlorizated salt can there are many selections, such as magnesium chloride, calcium chloride, chlorine Change aluminium, potassium chloride etc., in order to further make raw material simple and easy to get and improve reaction efficiency and yield, it is preferable that alkali metal chlorination Salt is at least one of sodium chloride, potassium chloride and lithium chloride.
The number-average molecular weight of polyethylene glycol can be selected in a wider range, through studying, with polyethylene glycol point The increase of son amount, nanometer sheet become closer to square, but little on the influence of center rejected region, and explanation will obtain nano-rings Shape structure, the molecular weight of PEG are not major influence factors.In order to further make raw material simple and easy to get and improve reaction efficiency and production Rate, it is preferable that the number-average molecular weight of polyethylene glycol is 3350-10000.
The present invention also provides a kind of BiOCl nano-rings synthesized according to previously described synthetic method.
Through the above technical solutions, the present invention has obtained BiOCl nano-rings, BiOCl nano-rings synthesis side has not only been filled up The blank in face, and obtained BiOCl nano-rings are living with higher photocatalysis compared with the BiOCl nanometer sheet of Traditional center not apertures Property.Moreover, the synthetic method step is simple, easily controllable, obtained BiOCl nano-rings regular appearance, not only have compared with High scientific research value, photocatalytic applications value also with higher.
The present invention will be described in detail by way of examples below.
Embodiment 1
By 1mmol Bi (NO3)3·5H2O ultrasonic dissolution is labeled as solution A into 15mL distilled water.1mmol KCl is added Into 15mL distilled water, 0.1g polyethylene glycol (PEG-6000) is added after ultrasonic dissolution, ultrasonic disperse is labeled as B solution.B is molten Drop is added in solution A, then stirs mixed solution 30 minutes.It is finally transferred in the autoclave of 40mL, 160 DEG C add Heat 12 hours.After reaction, cooled to room temperature, product distilled water, ethanol washing are dry to constant weight, Product Labeling For BiOCl-S.
Above-mentioned synthetic product is weighed into 0.03g ultrasonic disperse to 15mL 1molL-1HNO3In solution, continuously stir 6h obtains final product, Product Labeling BiOCl-R.
Embodiment 2
(1) bismuth nitrate, sodium chloride and polyethylene glycol (number-average molecular weight 3350) is soluble in water, Bi will be contained3+、Cl- 140 DEG C of heating reaction 15h are carried out at the aqueous solution of polyethylene glycol, obtain BiOCl nanometer sheet;Bi in aqueous solution3+Concentration be 20mmol/L, Bi in aqueous solution3+And Cl-The ratio between the amount of substance be 1:0.8;Bi relative to 1mmol3+, the matter of polyethylene glycol Amount content is 0.05g;
Product after heating reaction in step (1) is cooled down, is repeatedly washed with distilled water and ethyl alcohol and dry;
(2) lasting to stir by BiOCl nanometer sheet ultrasonic disperse in the nitric acid solution of 0.8mol/L, etch 3h;Relative to 1g BiOCl nanometer sheet, the dosage of nitric acid solution are 100mL.
Embodiment 3
(1) bismuth nitrate, potassium chloride and polyethylene glycol (number-average molecular weight 10000) is soluble in water, Bi will be contained3+、Cl- 180 DEG C of heating reaction 8h are carried out at the aqueous solution of polyethylene glycol, obtain BiOCl nanometer sheet;Bi in aqueous solution3+Concentration be 50mmol/L, Bi in aqueous solution3+And Cl-The ratio between the amount of substance be 1:1.2;Bi relative to 1mmol3+, the matter of polyethylene glycol Amount content is 0.1g;
Product after heating reaction in step (1) is cooled down, is repeatedly washed with ethyl alcohol and dry;
(2) lasting to stir by BiOCl nanometer sheet ultrasonic disperse in the sulfuric acid solution of 0.5mol/L, etch 8h;Relative to 1g BiOCl nanometer sheet, the dosage of nitric acid solution are 600mL.
Embodiment 4
(1) bismuth oxalate, potassium chloride and polyethylene glycol (number-average molecular weight 4000) is soluble in water, Bi will be contained3+、Cl- 160 DEG C of heating reaction 10h are carried out at the aqueous solution of polyethylene glycol, obtain BiOCl nanometer sheet;Bi in aqueous solution3+Concentration be 30mmol/L, Bi in aqueous solution3+And Cl-The ratio between the amount of substance be 1:1;Bi relative to 1mmol3+, the quality of polyethylene glycol Content is 0.05g;
Product after heating reaction in step (1) is cooled down, is repeatedly washed with distilled water and dry;
(2) lasting to stir by BiOCl nanometer sheet ultrasonic disperse in the nitric acid solution of 1mol/L, etch 1h;Relative to 1g BiOCl nanometer sheet, the dosage of nitric acid solution are 300mL.
Embodiment 5
BiOCl nano-rings are synthesized according to the method for embodiment 1, the difference is that etch period is 3h.To embodiment 1 and implement Gained BiOCl nano-rings are detected in example 5, the result is shown in Figure 1, in Fig. 1: (a) being the BiOCl that etching 3h is obtained in embodiment 5 SEM (scanning electron microscope) figure of nano-rings (b) etches the BiOCl nano-rings SEM figure that 6h is obtained in embodiment 1;(c) in embodiment 1 TEM (transmission electron microscope) figure for the BiOCl nano-rings that etching 6h is obtained;(d) BiOCl nanometers in embodiment 5 and embodiment 1 Ring corresponding XRD (X-ray diffraction) figure, to study influence of the etch period to sample topography.
Found out by SEM figure in Fig. 1, sample is nanometer cyclic structure, and nanometer sheet centre bore is significantly greater than etching after etching 6h 3h.TEM figure further confirms that sample is nanometer cyclic structure.It can be seen that spreading out for etched rear sample from the XRD spectrum provided Penetrate peak and both correspond to BiOCl (JCPDS No.06-0249), and do not detect other impurity peaks, illustrate synthetic product compared with It is pure.
Similarly, there is nanometer cyclic structure, warp and BiOCl in the SEM figure of the BiOCl nano-rings in embodiment 2-4 (JCPDS No.06-0249) is compareed, and does not detect other impurity peaks.
It is presumed that reaction mechanism of the invention are as follows: bismuth oxalate, bismuth nitrate are susceptible to hydrolysis in water, generate alkali formula nitric acid Bismuth, while a large amount of hydrogen ions are discharged, so that solution is in acidic environment.After the polyglycol solution of alkali metal chlorizated salt is added, chlorine Ion attack basic bismuth nitrate generates BiOCl nucleus.Hydrogen ion is adsorbed on BiOCl nucleus (001) crystalline substance by H-O key in solution Face, then anisotropic growth is the laminated structure of exposure (001) crystal face.PEG is nonionic surfactant, passes through hydroxyl oxygen Atom is coordinated with bismuth, is adsorbed on BiOCl (001) crystal face, ultimately forms the defective BiOCl nanometer sheet of (001) crystal face.When Defective BiOCl is put into HNO3Or in sulfuric acid solution after, thus rejected region is opened due to higher reactivity, etching reaction Begin.As etch period extends, etching degree is deepened, and gradually forms BiOCl nano-rings.
Embodiment 6
It is prepared according to the method for embodiment 1, the difference is that polyethylene (PEG-6000) is changed to PEG- respectively 3350, PEG-4000, PEG-10000, i.e. PEG number-average molecular weight are respectively 3350,4000,10000.
To the carry out sem analysis for the BiOCl nanometer sheet that step (1) obtains, Fig. 2 is obtained, in Fig. 2: (a) PEG-3350, (b) PEG-4000, (c) PEG-6000, (d) PEG-10000 study the PEG (3350-10000) of different molecular weight to nanometer sheet with this The influence at central defect position.As seen from Figure 2, with the increase of PEG molecular weight, nanometer sheet becomes closer to square, but Center rejected region is influenced little.Illustrate to obtain a nanometer cyclic structure, the molecular weight of PEG is not major influence factors. After etched, BiOCl nano-rings can be obtained.
Embodiment 7
It is prepared according to the method for embodiment 1, the difference is that the dosage of polyethylene (PEG-6000) is replaced with respectively 0.1g, 0.15g, 0.2g.
To the carry out sem analysis for the BiOCl nanometer sheet that step (1) obtains, Fig. 5 is obtained, the dosage of PEG-6000 point in Fig. 5 Not are as follows: (a) 0.05g, (b) 0.1g, (c) 0.15g, (d) 0.2g, to study influence of the different PEG dosages to nanometer sheet pattern.From SEM figure can be seen that, as PEG dosage less (0.05g, 0.1g), the more uniform square nanometer sheet of appearance and size can be obtained. With the increase of dosage, there is various sizes of nanometer sheet to coexist, but the influence to the thickness and central defect of nanometer sheet is unobvious. After acid solution etches, nano-rings can be obtained.
Comparative example 1
It is prepared according to the synthetic method of embodiment 1, unlike, nitric acid solution is replaced with into HF solution.
Comparative example 2
It is prepared according to the synthetic method of embodiment 1, unlike, nitric acid solution is replaced with into acetic acid solution.
Through carrying out sem analysis to the product in embodiment 1, embodiment 3 and comparative example 1, comparative example 2, different acid solutions are obtained (unitary acid concentration is 1molL-1, the concentration of sulfuric acid is 0.51molL-1) SEM that nanometer sheet in step (1) etches is schemed, As a result as shown in Figure 3: (a) acid solution is HF solution, and (b) acid solution is acetic acid solution, and (c) acid solution is sulfuric acid solution, and (d) acid solution is nitre Acid solution.Fig. 3 gives the BiOCl nanometer sheet under four kinds of different acid etches.It is found by Fig. 3, sample stirs in HF and acetic acid After 6h, BiOCl nanometer sheet center is not etched, and keeps original state.After stirring 6h in sulfuric acid and nitric acid solution, the central part of piece Divide and successfully etched, forms cyclic structure.Show that the BiOCl nanometer sheet presoma of this paper can be by sulfuric acid quarter, Nitric acid etching cyclization.
Comparative example 3
It is prepared according to the synthetic method of embodiment 1, unlike, potassium chloride is replaced with into hydrochloric acid.
Comparative example 4
It is prepared according to the synthetic method of embodiment 1, unlike, potassium chloride is replaced with into hexadecyltrimethylammonium chloride (CTAC)。
Sem analysis, research are carried out through the product to the step (1) in embodiment 1, embodiment 2 and comparative example 3, comparative example 4 Influence using different chlorine sources to nanometer sheet pattern, as a result as shown in figure 4, in Fig. 4: (a) KCl, (b) HCl, (c) CTAC, (d) NaCl;Find out from SEM figure, the uniform BiOCl nanometer sheet of pattern can be obtained using KCl and NaCl, and piece center is defective; And when with hydrochloric acid and hexadecyltrimethylammonium chloride (CTAC), then it cannot get the BiOCl that piece center is defective and pattern is uniform Nanometer sheet.After further acid etching, it cannot be formed and be received with the nanometer sheet that hydrochloric acid and hexadecyltrimethylammonium chloride (CTAC) obtain Meter Huan.
Application examples 1
In the case where temperature is 30 DEG C and illumination condition by the BiOCl-S and each 0.04g of BiOCl-R in embodiment 1, respectively with Aqueous solution 40mL containing methyl orange (MO) (10mg/L) is contacted.As a result as shown in fig. 6, the degradation of (a) MO (10mg/L) Curve;(b) when being photochemical catalyst with BiOCl-R (BiOCl nano-rings), the UV-visible spectrum of MO solution, in figure curve from The corresponding photocatalysis duration of top to bottm is from short to long;As it can be seen that BiOCl-R nano-rings sample shows higher photocatalytic activity, 100% MO (10mg/L) can be degradable in 2 minutes under sunlight irradiation, and BiOCl-R nano-rings degradation rate is Twice of nanometer sheet BiOCl-S.
Through detecting, the BiOCl nano-rings in embodiment 1-7 equally have the light of the center of the being substantially better than not nanometer sheet of apertures Catalytic degradation efficiency.
As it can be seen that BiOCl nano-rings of the invention have preferable photocatalytic activity, photocatalytic pollutant degradation of the invention Method have the characteristics that it is high-efficient.
Application examples 2
In the case where temperature is 30 DEG C and illumination condition by the BiOCl-S and each 0.04g of BiOCl-R in embodiment 1, respectively with Aqueous solution 40mL containing methyl orange (MO) (30mg/L) is contacted.As a result as shown in fig. 7, the degradation of (a) MO (30mg/L) Curve;(b) when being photochemical catalyst with BiOCl-R (BiOCl nano-rings), the UV-visible spectrum of MO solution, in figure curve from The corresponding photocatalysis duration of top to bottm is from short to long;As it can be seen that BiOCl-R nano-rings sample shows higher photocatalytic activity, 100% MO (30mg/L) can be degradable in 10 minutes under sunlight irradiation, hence it is evident that better than the drop of nanometer sheet BiOCl-S Solve efficiency.
Application examples 3
In the case where temperature is 30 DEG C and illumination condition by the BiOCl-S and each 0.04g of BiOCl-R in embodiment 1, respectively with Aqueous solution 40mL containing rhodamine B (RhB) (10mg/L) is contacted.As a result as shown in figure 8, the drop of (a) RhB (10mg/L) Solution curve;(b) when being photochemical catalyst with BiOCl-R (BiOCl nano-rings), the UV-visible spectrum of RhB solution is bent in figure Corresponding photocatalysis duration is from short to long from top to bottom for line;It lives as it can be seen that BiOCl-R nano-rings sample shows higher photocatalysis Property, 100% RhB (10mg/L) can be degradable in 4 minutes under sunlight irradiation, and BiOCl-R nano-rings degradation speed Rate is 2.5 times of nanometer sheet BiOCl-S.
Application examples 4
In the case where temperature is 30 DEG C and illumination condition by the BiOCl-S and each 0.04g of BiOCl-R in embodiment 1, respectively with Aqueous solution 40mL containing rhodamine B (RhB) (30mg/L) is contacted.As a result as shown in figure 9, the drop of (a) RhB (30mg/L) Solution curve;(b) when being photochemical catalyst with BiOCl-R (BiOCl nano-rings), the UV-visible spectrum of RhB solution is bent in figure Corresponding photocatalysis duration is from short to long from top to bottom for line;It lives as it can be seen that BiOCl-R nano-rings sample shows higher photocatalysis Property, 100% RhB (10mg/L) can be degradable in 14 minutes under sunlight irradiation, and the catalysis of BiOCl-R nano-rings Activity is substantially better than BiOCl-S nanometer sheet.
Application examples 5
It is compareed according to catalytic activity of the application examples 1 to BiOCl-R, BiOCl-S nanometer sheet, unlike, MO is become More 10mg/L phenol, the results are shown in Figure 10, it is seen then that the catalytic activity of BiOCl-R is better than BiOCl-S sample, in 40 minutes Phenol is by BiOCl-R catalyst degradation 90%.
Through detecting, the BiOCl nano-rings in embodiment 1-7 equally have the light of the center of the being substantially better than not nanometer sheet of apertures Catalytic degradation efficiency.
As it can be seen that BiOCl nano-rings of the invention have preferable photocatalytic activity, photocatalytic pollutant degradation of the invention Method have the characteristics that it is high-efficient.
Application examples 6
According to the method for application examples 1, using the BiOCl-R sample in 0.04g embodiment 1 to 40mL10mg/L methyl orange water Solution photocatalytic degradation carries out repeating to degrade 5 times, the degradation efficiency after observation recycling, as a result as shown in figure 11, it is seen then that Stability is preferable in the photocatalytic process for the BiOCl nano-rings of BiOCl-R, and recycling rate of waterused is higher.
Five forward and backward diffraction patterns of circulation, discovery are being carried out using X-ray diffraction analysis BiOCl-R photochemical catalyst BiOCl-R photochemical catalyst recycle for five times forward and backward diffraction maximum change substantially it is small, it is seen then that BiOCl-R photochemical catalyst is urged in light Stability is preferable during change, and recycling rate of waterused is higher.
Similarly, through detecting, the BiOCl nano-rings in embodiment 1-7 all have that stability is preferable, and recycling rate of waterused is higher A little.
It can be seen that BiOCl nano-rings of the invention have excellent photocatalytic activity and reusing and it is ring Shape can reduce use condition, therefore, this product is that there is the efficiency light of practical value to urge as a result, convenient for dispersing in a liquid Agent.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally The thought of invention, it should also be regarded as the disclosure of the present invention.

Claims (14)

1. a kind of synthetic method of BiOCl nano-rings, which is characterized in that the synthetic method the following steps are included:
(1) Bi will be contained3+、Cl-Heating reaction is carried out with the aqueous solution of polyethylene glycol, obtains BiOCl nanometer sheet;
(2) BiOCl nanometer sheet is etched in acid solution;
Wherein, Cl is provided-Substance be alkali metal chlorizated salt;
Wherein, acid solution is the mixed solution of nitric acid solution, sulfuric acid solution or nitric acid and sulfuric acid;
Wherein, H in acid solution+Concentration be 0.8-1.5mol/L;Etch period is 1-8h.
2. synthetic method according to claim 1, wherein Bi in aqueous solution3+And Cl-The ratio between the amount of substance be 1:0.8- 1.2。
3. synthetic method according to claim 1, wherein Bi in aqueous solution3+Concentration be 20-50mmol/L.
4. synthetic method according to claim 2, wherein in aqueous solution: the Bi relative to 1mmol3+, the matter of polyethylene glycol Amount content is 0.05-0.1g.
5. synthetic method according to claim 1, wherein it is 140-180 DEG C that the condition for heating reaction, which includes: temperature,;
And/or time 8-15h.
6. synthetic method according to claim 1, wherein relative to 1g BiOCl nanometer sheet, the dosage of acid solution is 100- 600mL。
7. synthetic method according to claim 1, wherein etch period 3-6h.
8. synthetic method according to claim 6, wherein the specific steps of etching include: by BiOCl nanometer sheet ultrasound point It is dissipated in acid solution, it is lasting to stir.
9. synthetic method according to claim 1-8, wherein contain Bi3+、Cl-With the aqueous solution of polyethylene glycol It obtains in the following manner:
Alkali metal chlorizated salt and polyethylene glycol are pre-dissolved in water, ultrasonic disperse, are then added dropwise to predissolve and are provided with Bi3+Object In the aqueous solution of matter, 20-40min is mixed.
10. synthetic method according to claim 9, wherein in advance dissolved with the aqueous solution of alkali metal chlorizated salt and polyethylene glycol Bi is provided with predissolve3+Substance aqueous solution volume ratio be 1:0.8-1.2.
11. synthetic method according to claim 9, wherein further include being carried out to the product after heating reaction in step (1) It cools down, the step repeatedly washed and dried with distilled water and/or ethyl alcohol.
12. synthetic method according to claim 9, wherein provide Bi3+Substance be bismuth nitrate and/or bismuth oxalate;
And/or alkali metal chlorizated salt is at least one of sodium chloride, potassium chloride and lithium chloride;
And/or the number-average molecular weight of polyethylene glycol is not more than 10000.
13. synthetic method according to claim 12, wherein the number-average molecular weight of polyethylene glycol is 3350-10000.
14. the BiOCl nano-rings that -13 described in any item synthetic methods synthesize according to claim 1.
CN201810460435.2A 2018-05-15 2018-05-15 BiOCl nano-rings and its synthetic method Active CN108502926B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810460435.2A CN108502926B (en) 2018-05-15 2018-05-15 BiOCl nano-rings and its synthetic method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810460435.2A CN108502926B (en) 2018-05-15 2018-05-15 BiOCl nano-rings and its synthetic method

Publications (2)

Publication Number Publication Date
CN108502926A CN108502926A (en) 2018-09-07
CN108502926B true CN108502926B (en) 2019-11-05

Family

ID=63400692

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810460435.2A Active CN108502926B (en) 2018-05-15 2018-05-15 BiOCl nano-rings and its synthetic method

Country Status (1)

Country Link
CN (1) CN108502926B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109289878B (en) * 2018-09-18 2021-06-01 哈尔滨理工大学 BiOI micron ring and preparation method thereof
CN109678207A (en) * 2019-03-04 2019-04-26 李延祥 A kind of bismuth oxychloride pearlescent pigment crystal and its preparation method and application
CN109999852A (en) * 2019-04-18 2019-07-12 河南师范大学 A kind of preparation method of the brown BiOCl photocatalytic material of visible absorption enhancing
CN110240197B (en) * 2019-07-04 2020-11-10 福州大学 Ultrathin nanosheet self-assembled multilayer BiOCl microsphere and application thereof in photocatalytic coupling of benzylamine to imine
CN110302811B (en) * 2019-08-05 2020-07-31 南京工业大学 Bismuth oxychloride sheet material with radial cracks and preparation method and application thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102162126A (en) * 2011-03-09 2011-08-24 新疆大学 Method for preparing BiOCl monocrystalline nano-chip
CN103464175A (en) * 2013-09-29 2013-12-25 南开大学 Method for preparing visible light photocatalyst BiOCl nanometer sheet
CN104069876A (en) * 2014-06-24 2014-10-01 华中师范大学 Ag-BiOCl compound photocatalyst prepared by depositing nanometer silver on [001] crystal face of BiOCl nanometer sheet and method
CN104588045A (en) * 2015-01-14 2015-05-06 安徽师范大学 Ultra-thin BiOCl nano-sheet, preparation method and application thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102162126A (en) * 2011-03-09 2011-08-24 新疆大学 Method for preparing BiOCl monocrystalline nano-chip
CN103464175A (en) * 2013-09-29 2013-12-25 南开大学 Method for preparing visible light photocatalyst BiOCl nanometer sheet
CN104069876A (en) * 2014-06-24 2014-10-01 华中师范大学 Ag-BiOCl compound photocatalyst prepared by depositing nanometer silver on [001] crystal face of BiOCl nanometer sheet and method
CN104588045A (en) * 2015-01-14 2015-05-06 安徽师范大学 Ultra-thin BiOCl nano-sheet, preparation method and application thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PEG-assisted hydrothermal synthesis of BiOCl with enhanced photocatalytic performance;Xinlu Liu等;《Appl. Phys. A》;20150421;第119卷;第1203-1208页 *

Also Published As

Publication number Publication date
CN108502926A (en) 2018-09-07

Similar Documents

Publication Publication Date Title
CN108502926B (en) BiOCl nano-rings and its synthetic method
CN103480398B (en) Micronano-structured and graphene based composite visible light catalytic material and preparing method thereof
CN103480399B (en) Micronano-structured and silver phosphate based composite visible light catalytic material and preparing method thereof
CN105384193B (en) Preparation method of niobium (V) pentoxide urchin-like nano sphere and application of nano sphere as photocatalyst
CN105688899B (en) The preparation method and purposes of a kind of Three-element composite photocatalyst
CN104263317A (en) Method for synthesizing cobalt oxide/graphene composite wave-absorbing material
CN104190448A (en) Preparation method and application of visible light photocatalyst, namely BiOCl nanosheets
CN105478142A (en) Indium-sulfide mesoporous hollow microsphere photocatalyst, and preparation method and uses thereof
CN102974373A (en) Visible-light photocatalytic material and preparation method thereof
CN103420414B (en) Solvothermal preparation method of bismuth trioxide microspheres and application thereof
CN107159273A (en) A kind of preparation method of BiOCl nano-photocatalysts and obtained photochemical catalyst and application
CN108579770A (en) A method of carrying out degradation of contaminant using BiOCl nano-rings
CN105561965B (en) A kind of preparation method of flower-shaped ZnO/ graphenes complex microsphere
CN107952455A (en) It is a kind of with the three-dimensional sheet BiOI catalysis materials of macroscopic frame and its preparation and application
CN103638929B (en) A kind of Graphene-wolframic acid silver composite photocatalyst material and preparation method thereof
CN101580271B (en) Preparation method of tin dioxide nanometer tube
CN107876069A (en) BiOCl photochemical catalysts and its synthetic method with highlight catalytic active
CN105148955A (en) Preparation process of complex photocatalyst with multiwalled carbon nanotube loading silver/silver phosphate core-shell structure
CN105645459A (en) Surface modified urchin-shaped ZnO/TiO2 composite material and preparation method thereof
CN105126885A (en) Composite visible light photocatalytic material and preparation method and application thereof
CN104772134A (en) Method for massively preparing mesoporous BiVO4/Bi2O3 composite micro-rod p-n heterojunction photocatalyst
CN105833860A (en) CQDs/Bi2WO6 composite photocatalyst and preparation method thereof
CN106311307A (en) Method for preparing heterojunction photocatalyst
CN106492848A (en) A kind of Basic bismuth bromide and nano-zinc stannate hetero-junctions and preparation method thereof
CN102660763A (en) Preparation method for TiO2 nanotube array film with high catalytic properties and application of TiO2 nanotube array film

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant