CN108339560A - A kind of amorphous FeOOHg-C3N4Composite nano materials and the preparation method and application thereof - Google Patents

A kind of amorphous FeOOHg-C3N4Composite nano materials and the preparation method and application thereof Download PDF

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Publication number
CN108339560A
CN108339560A CN201710213663.5A CN201710213663A CN108339560A CN 108339560 A CN108339560 A CN 108339560A CN 201710213663 A CN201710213663 A CN 201710213663A CN 108339560 A CN108339560 A CN 108339560A
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feooh
feoohg
cnns
amorphous
nano materials
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张守伟
徐锡金
杨红岑
曹茹雅
邓小龙
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University of Jinan
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University of Jinan
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    • 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
    • B01J27/24Nitrogen compounds
    • B01J35/39

Abstract

The invention discloses a kind of amorphous FeOOHg C3N4Composite nano materials and the preparation method and application thereof.The FeOOHg C3N4Composite nano materials are FeOOH nanoparticle and nanometer g C3N4Compound particle.In the material, the method for using easy in-situ deposition, and also since its raw material is easily obtained, low cost is convenient for large-scale industrial production.In producing preparation process, a FeOOH nanoparticle sizes of acquisition are minimum, g C3N4Nanometer sheet is ultra-thin, this is advantageous for ultra-fine a FeOOH and g C3N4Compound tense produces more effective hetero-junctions and further improves nano material a FeOOH and g C3N4Between synergistic effect, while ultra-fine nano particle shortens the diffusion length of photo-generated carrier, reduces the loss of photo-generated carrier, to improve the photocatalysis performance of material.

Description

A kind of amorphous FeOOHg-C3N4Composite nano materials and the preparation method and application thereof
Technical field
The present invention relates to a kind of nano material, more particularly to a kind of amorphous FeOOHg-C3N4Composite nano materials and its system Preparation Method and application.
Background technology
In recent years, with global industryization and economic continuous development, problem of environmental pollution getting worse.Currently, partly leading Body photocatalysis technology due to its can poisonous and hazardous organic pollutant degradation for non-toxic products be considered as solve environment The important channel of pollution problem.But Photocatalitic Technique of Semiconductor still has many defects, such as photoresponse range and light are urged It is low to change efficiency.Therefore, there is the novel photocatalyst of high visible response and high photocatalysis efficiency to have become one and compel for development The work cut.
In the oxide and hydroxide of iron, amorphous FeOOH (a-FeOOH) is because it is ultraviolet and visible light The performance of good photocatalytic degradation is shown under radiation and by extensive.A-FeOOH is easy to obtain from nature, nothing Poison, it is corrosion-resistant and inexpensive, and the band gap relative narrower of a-FeOOH.In these advantages, narrow band gap is of crucial importance , it, which represents a-FeOOH, has wide photoresponse range, can absorb visible light, this is before realizing high photocatalysis efficiency It carries.
Non-metal semiconductor materials graphite phase carbon nitride (g-C3N4) showed in terms of the photocatalytic degradation to organic pollution Go out good performance and the extensive concern by researcher, this is mainly due to its unique three-layer laminated structure, relatively Narrow band gapAnd the features such as low cost.But the shortcomings of quantum efficiency is low and visible light-responded narrow range, limits G-C is made3N4Extensive use.Currently, scientists take many measures to solve these problems, including with carbon material or The doping of the combination of other semiconductors, metal and/or nonmetallic materials, the construction etc. of hetero-junctions.But it all cannot be fundamentally Enhancing visible absorption range simultaneously improves photogenerated charge separation and transfer.
Invention content
The purpose of the present invention is to provide a kind of amorphous FeOOHg-C3N4Composite nano materials and preparation method thereof with answer With.
A kind of amorphous FeOOHg-C3N4Composite nano materials, the FeOOHg-C3N4Composite nano materials are nanometer FeOOH and nanometer g-C3N4Compound particle;
(1) it takes urea to be put into crucible, closes the lid, be put into Muffle furnace, then first time high temperature sintering drops temperature Down to room temperature, the g-C that will be sintered3N4Lid lid, which is not placed again into Muffle furnace, carries out second of high temperature sintering, is cooled to room temperature Afterwards, it is further dried by ion water washing and in vacuum drying oven and obtains g-C3N4Nanometer sheet;
(2) Iron trichloride hexahydrate is dissolved in absolute ethyl alcohol, then, then by g-C3N4Nanometer sheet is added in solution and surpasses Sound stirs 1-3 hours, then, then adds NH into suspension4HCO3, and continue to be stirred to react 6-10 hours, finally, collect production Object is simultaneously washed with absolute ethyl alcohol, and processing is dried by vacuum freeze drier.
The first time high temperature sintering sets heating rate as 2.5 DEG C/min, and temperature is 550 DEG C, soaking time 240min.
Second of high temperature sintering sets heating rate as 5 DEG C/min, and temperature is 500 DEG C, soaking time 120min.
The Iron trichloride hexahydrate dosage is 1mmoL;The absolute ethyl alcohol dosage is 150mL;The NH4HCO3Dosage be 3mmoL;The g-C3N4Dosage be 300mg, 400mg, 500mg, 600mg, 700mg, 800mg or 900mg.
Above-mentioned amorphous FeOOHg-C3N4Application of the composite nano materials in degradable organic pollutant.
Compared with prior art, the present invention has the advantages that:Preparing composite material a-FeOOHg-C3N4When, it adopts With the method for easy in-situ deposition, and since its raw material is easily obtained, low cost.Therefore, a-FeOOHg-C3N4It is convenient for Large-scale industrial production.In producing preparation process, the a-FeOOH nanoparticle sizes of acquisition are minimum, g-C3N4Nanometer Piece is ultra-thin.This is advantageous for ultra-fine a-FeOOH and g-C3N4Compound tense produces more effective hetero-junctions and further Improve nano material a-FeOOH and g-C3N4Between synergistic effect, while ultra-fine nano particle shortens photo-generated carrier Diffusion length, reduce the loss of photo-generated carrier, to improve the photocatalysis performance of material.In construction a-FeOOHg- C3N4When hetero-junctions, a-FeOOH and g-C3N4All there is suitable band structure, this is advantageous for the formation of hetero-junctions, reduces Photo-generated carrier compound simultaneously further improves light-catalysed efficiency.
Description of the drawings
Fig. 1 is the XRD spectrum of CNNS and a-FeOOH/CNNS composite materials.
Fig. 2 is CNNS, the FT-IR collection of illustrative plates of a-FeOOH and a-FeOOH/CNNS composite materials.
Fig. 3 (A) and (B) are the high-resolution spectroscopy of the C1s and N1s of a-FeOOH/CNNS-800 composite materials;(C) and (D) be a-FeOOH/CNNS-800 composite materials Fe2p and O1s high-resolution spectroscopy.
(A) the UV-vis diffusing reflection spectrums of Fig. 4 CNNS, a-FeOOH and a-FeOOH/CNNS composite materials and (B) number are shone Piece.
Fig. 5 (A) CNNS, (B) a-FeOOH/CNNS-400 composite materials, (C) a-FeOOH/CNNS-600 composite materials and (D) SEM image of a-FeOOH/CNNS-800 composite materials.
Fig. 6 (A) and (D) a-FeOOH, (B) and (E) a-FeOOH/CNNS-800 composite materials and (C) and (F) CNNS are compound The TEM image of material.
The element mapping graph and EDX spectrum of Fig. 7 a-FeOOH/CNNS-800 composite materials.
The photocatalytic activity that photochemical catalyst prepared by Fig. 8 (A) degrades to RhB under radiation of visible light;(B) radiation of visible light Lower prepared photochemical catalyst is to RhB, the photocatalytic activity of MB, MO degradation;(C) under visible light illumination by a-FeOOH/ The absorption spectrum of the RhB of CNNS-800 composite degradations;(D) it is dropped under visible light illumination by a-FeOOH/CNNS composite materials The corresponding digital photos of RhB of solution.
The rate constant that photochemical catalyst prepared by Fig. 9 (A) degrades to RhB;(B) RhB that degrades, the preparation of MB, MO are used for Photochemical catalyst rate constant.
Figure 10 (A) a-FeOOH/CNNS-800 composite materials stability that RhB degrades under visible light illumination.(B) can Under light-exposed irradiation, the free radical capture experiment in a-FeOOH/CNNS-800 composite materials in RhB Photocatalytic Degradation Process.
Specific implementation mode
Below in conjunction with the accompanying drawings, the specific implementation mode of the present invention is described in detail, it is to be understood that the guarantor of the present invention Shield range is not restricted by specific implementation.
The preparation of 1 ultra-fine a-FeOOH of embodiment
Under conditions of being stirred continuously, by the Iron trichloride hexahydrate (FeCl of 1mmoL3·6H2O) it is dissolved into the anhydrous second of 150mL In alcohol.Then, during stirring, the ammonium hydrogen carbonate (NH of 3mmoL is added4HCO3), and solution is stirred 8 hours.Most Afterwards, it collects product and is washed with absolute ethyl alcohol, and be dried by vacuum freeze drier, to obtain ultra-fine a-FeOOH.
Embodiment 2a-FeOOHg-C3N4The preparation (a-FeOOH/CNNS) of nanocomposite
It takes urea to be put into crucible, closes the lid, be put into Muffle furnace, set heating rate as 2.5 DEG C/min, temperature is 550 DEG C, soaking time 240min.After temperature reduces, the g-C that will sinter3N4Lid lid, which is not placed again into Muffle furnace, continues height Temperature sintering, heating rate are 5 DEG C/min, 500 DEG C of temperature, soaking time 120min.After being cooled to room temperature, pass through ion water washing And the ultra-thin CNNS needed for obtaining is further dried in vacuum drying oven.
By the FeCl of 1mmoL3·6H2O is dissolved in 150mL absolute ethyl alcohols.Then, then by a certain amount of g-C3N4Nanometer Piece is added in solution and is stirred by ultrasonic 2 hours so that g-C3N4Nanometer sheet is disperseed.Then, then into suspension it is added 3mmoL's NH4HCO3, and continue to be stirred to react 8 hours.Finally, it collects product and is washed with absolute ethyl alcohol, and pass through vacuum freeze drying Processing is dried in machine.In this preparation, 300mg, 400mg, 500mg will be separately added into, 600mg, 700mg, 800mg and The g-C of 900mg3N4Nanometer sheet prepares a-FeOOH/CNNS nanocomposites, and is respectively designated as a-FeOOH/CNNS- 300, a-FeOOH/CNNS-400, a-FeOOH/CNNS-500, a-FeOOH/CNNS-600, a-FeOOH/CNNS-700, a- FeOOH/CNNS-800 and a-FeOOH/CNNS-900.
The a-FeOOHg-C of preparation3N4Nanocomposite XRD spectrum is as shown in Figure 1.In pure g-C3N4The XRD of nanometer sheet In collection of illustrative plates, (100) and (002) that the diffraction maximum at 13.1 ° and 27.8 ° corresponds respectively to graphite phase carbon nitride nanometer sheet are spread out Penetrate face.But the diffraction maximum of a-FeOOH is not all shown in all XRD spectrums of a-FeOOH/CNNS composite materials, this It may be the amorphous feature due to a-FeOOH in composite material.
FT-IR collection of illustrative plates is as shown in Figure 2.For a-FeOOH/CNNS-300, a-FeOOH/CNNS-400, a-FeOOH/ CNNS-500, a-FeOOH/CNNS-600, a-FeOOH/CNNS-700, a-FeOOH/CNNS-800 and a-FeOOH/CNNS-900 FT-IR collection of illustrative plates, more no notable difference with CNNS collection of illustrative plates, show the introducing of a-FeOOH do not change CNNS chemistry knot Structure, Fig. 3 (A) and (B) are the high-resolution spectroscopy of the C1s and N1s of a-FeOOH/CNNS-800 composite materials;(C) and (D) is a- The high-resolution spectroscopy of the Fe2p and O1s of FeOOH/CNNS-800 composite materials.In the collection of illustrative plates of XPS, the peak value of composite material Corresponding chemical bond demonstrates the presence of a-FeOOH and CNNS.
Fig. 4 is CNNS, (A) the UV-vis diffusing reflection spectrums of a-FeOOH and a-FeOOH/CNNS composite materials and (B) number Photo.The energy bandwidth of CNNS (2.73eV) and a-FeOOH (1.51-1.55eV) can be obtained from the UV-vis spectrograms that diffuse Degree;The increase with a-FeOOH is shown simultaneously, and compared with CNNS, the absorption region of the spectrum of a-FeOOH/CNNS gradually increases Greatly, the absorption region of light is extended to visible light region, what the variation of this and composite material color was consistent with.
Fig. 5 (A) CNNS, (B) a-FeOOH/CNNS-400 composite materials, (C) a-FeOOH/CNNS-600 composite materials and (D) SEM image of a-FeOOH/CNNS-800 composite materials.Fig. 6 (A) and (D) a-FeOOH, (B) and (E) a-FeOOH/CNNS- The TEM image of 800 composite materials and (C) and (F) CNNS composite materials.It can be seen that CNNS has ultra-thin receive in SEM and TEM Rice chip architecture, but may be ultra-fine due to the particle size of a-FeOOH, it is not shown on SEM and TEM, therefore connect again EDX and Mapping can be used to carry out elemental analysis in characterization of getting off
The element mapping graph and EDX spectrum of Fig. 7 a-FeOOH/CNNS-800 composite materials.In Mapping and EDX collection of illustrative plates In, detect the presence of tetra- kinds of elements of Fe, O, C and N, it was demonstrated that a-FeOOH and CNNS compound successes.
The photocatalytic activity that photochemical catalyst prepared by Fig. 8 (A) degrades to RhB under radiation of visible light;(B) radiation of visible light Lower prepared photochemical catalyst is to RhB, the photocatalytic activity of MB, MO degradation;(C) under visible light illumination by a-FeOOH/ The absorption spectrum of the RhB of CNNS-800 composite degradations;(D) it is dropped under visible light illumination by a-FeOOH/CNNS composite materials The corresponding digital photos of RhB of solution.The rate constant that photochemical catalyst prepared by Fig. 9 (A) degrades to RhB;(B) it is used to degrade The rate constant of the photochemical catalyst of the preparation of RhB, MB, MO.It can be obtained from Fig. 8 and Fig. 9:Under visible light when degradation RhB, a- FeOOH/CNNS-800(0.0107min-1) possess higher photocatalysis efficiency, with pure CNNS (0.0006min-1) compare, light is urged Change rate and improve 17.8 times, the wherein rate constant of material is CNNS (0.0006min respectively-1),a-FeOOH/CNNS-300 (0.0023min-1),a-FeOOH/CNNS-400(0.0034min-1),a-FeOOH/CNNS-500(0.0042min-1),a- FeOOH/CNNS-600(0.0057min-1),a-FeOOH/CNNS-700(0.008min-1)anda-FeOOH/CNNS-900 (0.0071min-1).And a-FeOOH/CNNS composite materials have certain degradation effect for other dyestuffs (MB, MO), tool There is universality.
Figure 10 (A) a-FeOOH/CNNS-800 composite materials stability that RhB degrades under visible light illumination.(B) can Under light-exposed irradiation, the free radical capture experiment in a-FeOOH/CNNS-800 composite materials in RhB Photocatalytic Degradation Process.a- The stability test of FeOOH/CNNS-800 composite materials shows that composite material has splendid stability, the capture of free radical real It tests and illustrates OH and h+It has a certain impact for the degradation of a-FeOOH/CNNS composite materials.
Disclosed above is only specific embodiments of the present invention, and still, the present invention is not limited to this, any this field What technical staff can think variation should all fall into protection scope of the present invention.

Claims (5)

1. a kind of amorphous FeOOHg-C3N4Composite nano materials, which is characterized in that the FeOOHg-C3N4Composite nano materials For FeOOH nanoparticle and nanometer g-C3N4Compound particle;
(1) it takes urea to be put into crucible, closes the lid, be put into Muffle furnace, then temperature is reduced to by first time high temperature sintering Room temperature, the g-C that will be sintered3N4Lid lid, which is not placed again into Muffle furnace, carries out second of high temperature sintering, after being cooled to room temperature, It is further dried by ion water washing and in vacuum drying oven and obtains g-C3N4Nanometer sheet;
(2) Iron trichloride hexahydrate is dissolved in absolute ethyl alcohol, then, then by g-C3N4Nanometer sheet is added in solution and ultrasound is stirred It mixes 1-3 hours, then, then adds NH into suspension4HCO3, and continue to be stirred to react 6-10 hours, finally, collect product simultaneously It is washed with absolute ethyl alcohol, and processing is dried by vacuum freeze drier.
2. a kind of amorphous FeOOHg-C according to claim 13N4Composite nano materials, which is characterized in that the first time High temperature sintering sets heating rate as 2.5 DEG C/min, and temperature is 550 DEG C, soaking time 240min.
3. a kind of amorphous FeOOHg-C according to claim 13N4Composite nano materials, which is characterized in that described second High temperature sintering sets heating rate as 5 DEG C/min, and temperature is 500 DEG C, soaking time 120min.
4. a kind of amorphous FeOOHg-C according to claim 13N4Composite nano materials, which is characterized in that the six water chlorine Change iron dosage is 1mmoL;The absolute ethyl alcohol dosage is 150mL;The NH4HCO3Dosage be 3mmoL;The g-C3N4's Dosage is 300mg, 400mg, 500mg, 600mg, 700mg, 800 mg or 900mg.
5. amorphous FeOOHg-C described in claim 13N4Application of the composite nano materials in degradable organic pollutant.
CN201710213663.5A 2017-04-01 2017-04-01 A kind of amorphous FeOOHg-C3N4Composite nano materials and the preparation method and application thereof Pending CN108339560A (en)

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CN109317184A (en) * 2018-11-13 2019-02-12 武汉工程大学 Difunctional β-FeOOH/eg-C3N4Composite nano materials and its preparation method and application
CN109607675A (en) * 2019-01-14 2019-04-12 长江大学 Visible light-responded high-efficiency composite photocatalyst g-C3N4/ alpha-feooh/Ag preparation method
CN109772355A (en) * 2019-03-11 2019-05-21 辽宁石油化工大学 Amorphous FeOOH/alum acid bismuth composite photocatalyst material preparation method
CN109999887A (en) * 2019-04-30 2019-07-12 合肥工业大学 A kind of β-FeOOH/g-C3N4The preparation method of heterojunction photocatalysis material
CN111841615A (en) * 2020-08-20 2020-10-30 盐城工学院 g-C3N4/CDs/beta-FeOOH photocatalytic material and preparation method thereof
CN113083348A (en) * 2021-04-22 2021-07-09 合肥工业大学 Rod-shaped alpha-FeOOH/g-C3N4Preparation method of composite material photocatalyst
CN113318768A (en) * 2021-06-23 2021-08-31 北京中环鑫汇科技有限公司 Composite photocatalyst and preparation method thereof
CN114082419A (en) * 2020-08-03 2022-02-25 湖南师范大学 Amorphous hydroxide catalyst prepared by mechanical stirring method and research on efficient water electrolysis hydrogen production
CN117696100A (en) * 2024-02-06 2024-03-15 太原科技大学 g-C 3 N 4 / FeOOH /Cu 2 O nano heterojunction photocatalyst, and preparation method and application thereof
CN117696100B (en) * 2024-02-06 2024-04-16 太原科技大学 G-C3N4/ FeOOH /Cu2O nano heterojunction photocatalyst, and preparation method and application thereof

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Publication number Priority date Publication date Assignee Title
CN109317176A (en) * 2018-09-20 2019-02-12 吉林大学 A kind of azotized carbon nano piece that Fe (III) is modified and its application in photocatalysis fixed nitrogen
CN109317184A (en) * 2018-11-13 2019-02-12 武汉工程大学 Difunctional β-FeOOH/eg-C3N4Composite nano materials and its preparation method and application
CN109607675A (en) * 2019-01-14 2019-04-12 长江大学 Visible light-responded high-efficiency composite photocatalyst g-C3N4/ alpha-feooh/Ag preparation method
CN109772355A (en) * 2019-03-11 2019-05-21 辽宁石油化工大学 Amorphous FeOOH/alum acid bismuth composite photocatalyst material preparation method
CN109772355B (en) * 2019-03-11 2022-04-08 辽宁石油化工大学 Preparation method of amorphous iron oxyhydroxide/bismuth vanadate composite photocatalytic material
CN109999887B (en) * 2019-04-30 2022-02-08 合肥工业大学 beta-FeOOH/g-C3N4Preparation method of heterojunction photocatalytic material
CN109999887A (en) * 2019-04-30 2019-07-12 合肥工业大学 A kind of β-FeOOH/g-C3N4The preparation method of heterojunction photocatalysis material
CN114082419A (en) * 2020-08-03 2022-02-25 湖南师范大学 Amorphous hydroxide catalyst prepared by mechanical stirring method and research on efficient water electrolysis hydrogen production
CN111841615A (en) * 2020-08-20 2020-10-30 盐城工学院 g-C3N4/CDs/beta-FeOOH photocatalytic material and preparation method thereof
CN113083348A (en) * 2021-04-22 2021-07-09 合肥工业大学 Rod-shaped alpha-FeOOH/g-C3N4Preparation method of composite material photocatalyst
CN113318768A (en) * 2021-06-23 2021-08-31 北京中环鑫汇科技有限公司 Composite photocatalyst and preparation method thereof
CN113318768B (en) * 2021-06-23 2023-10-03 北京中环鑫汇科技有限公司 Composite photocatalyst and preparation method thereof
CN117696100A (en) * 2024-02-06 2024-03-15 太原科技大学 g-C 3 N 4 / FeOOH /Cu 2 O nano heterojunction photocatalyst, and preparation method and application thereof
CN117696100B (en) * 2024-02-06 2024-04-16 太原科技大学 G-C3N4/ FeOOH /Cu2O nano heterojunction photocatalyst, and preparation method and application thereof

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