CN109985644B - Photocatalyst for efficiently degrading organic dye in water and preparation method thereof - Google Patents
Photocatalyst for efficiently degrading organic dye in water and preparation method thereof Download PDFInfo
- Publication number
- CN109985644B CN109985644B CN201910395357.7A CN201910395357A CN109985644B CN 109985644 B CN109985644 B CN 109985644B CN 201910395357 A CN201910395357 A CN 201910395357A CN 109985644 B CN109985644 B CN 109985644B
- Authority
- CN
- China
- Prior art keywords
- solution
- photocatalyst
- nano
- water
- biocl
- 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
Links
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 230000000593 degrading effect Effects 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- BWOROQSFKKODDR-UHFFFAOYSA-N oxobismuth;hydrochloride Chemical compound Cl.[Bi]=O BWOROQSFKKODDR-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000002121 nanofiber Substances 0.000 claims abstract description 33
- 239000002131 composite material Substances 0.000 claims abstract description 21
- 239000002135 nanosheet Substances 0.000 claims abstract description 12
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 51
- 239000000243 solution Substances 0.000 claims description 50
- 239000000725 suspension Substances 0.000 claims description 19
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 9
- 238000009987 spinning Methods 0.000 claims description 9
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 8
- 239000002243 precursor Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 238000010041 electrostatic spinning Methods 0.000 claims description 7
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 6
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 6
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 6
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 4
- JHXKRIRFYBPWGE-UHFFFAOYSA-K bismuth chloride Chemical compound Cl[Bi](Cl)Cl JHXKRIRFYBPWGE-UHFFFAOYSA-K 0.000 claims description 4
- 238000001354 calcination Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 238000003786 synthesis reaction Methods 0.000 claims description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- 239000010937 tungsten Substances 0.000 claims description 2
- 239000000975 dye Substances 0.000 abstract description 14
- 239000003054 catalyst Substances 0.000 abstract description 4
- 230000031700 light absorption Effects 0.000 abstract description 3
- 229940073609 bismuth oxychloride Drugs 0.000 abstract description 2
- 238000011068 loading method Methods 0.000 abstract description 2
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 abstract description 2
- 238000005215 recombination Methods 0.000 abstract description 2
- 230000006798 recombination Effects 0.000 abstract description 2
- 229910001930 tungsten oxide Inorganic materials 0.000 abstract description 2
- 230000003197 catalytic effect Effects 0.000 abstract 1
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 19
- 229940043267 rhodamine b Drugs 0.000 description 12
- 230000001699 photocatalysis Effects 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 239000002244 precipitate Substances 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 238000000862 absorption spectrum Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- 229910052724 xenon Inorganic materials 0.000 description 5
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 238000001878 scanning electron micrograph Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000004043 dyeing Methods 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000002055 nanoplate Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 1
- 238000013032 photocatalytic reaction Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 231100000683 possible toxicity Toxicity 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/06—Halogens; Compounds thereof
- B01J27/132—Halogens; Compounds thereof with chromium, molybdenum, tungsten or polonium
-
- B01J35/39—
-
- B01J35/40—
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
Abstract
The invention relates to the technical field of nano photocatalysts, in particular to a photocatalyst for efficiently degrading organic dyes in water and a preparation method thereof, wherein the catalyst is formed by uniformly loading bismuth oxychloride nano-sheets on tungsten oxide nano-fibers; the thickness of the BiOCl nano sheet is 10-15nm, and WO3The diameter of the nano-fiber is 200-300 nm; WO of the invention3the/BiOCl composite photocatalyst has a widened light absorption range, effectively inhibits the recombination of photo-generated electron-hole pairs, greatly improves the surface catalytic activity, can quickly degrade organic dyes in water under the irradiation of sunlight, and is easy to recycle.
Description
Technical Field
The invention relates to the technical field of nano photocatalysts, in particular to a photocatalyst for efficiently degrading organic dyes in water and a preparation method thereof.
Background
With the rapid development of modern industry, environmental pollution is becoming more serious, especially the pollution of water resources is becoming more serious. China is the largest textile producing country in the world, and the wastewater discharge amount and the total pollutant amount of the printing and dyeing industry in China are respectively located at the second and fourth sites of the national industrial departments, and are one of the key pollution industries in China. The dye wastewater has the characteristics of high organic matter content, complex structure, low biodegradability and the like, and most of the dye wastewater has potential toxicity and is harmful to human health. Therefore, the development of the advanced treatment method of the printing and dyeing wastewater further reduces the concentration of pollutants in water, and has great significance for relieving the water resource crisis and maintaining the sustainable development of the printing and dyeing industry.
In recent years, the photocatalysis technology is applied to degrading some organic pollutants which are difficult to degrade in water, and remarkable effect is achieved. The photocatalytic reaction can utilize light energy to oxidize and decompose refractory organic matters into water and CO at normal temperature and normal pressure2And inorganic salt, so that organic matters are partially or even completely mineralized into inorganic small molecules, and the deep purification of the wastewater is realized. However, the application of photocatalytic technology is still limited by the development of new efficient photocatalysts. There are still two key problems in current semiconductor photocatalysts: firstly, the photoresponse wavelength range of most of the photocatalysts is mainly in an ultraviolet region, and the utilization rate of sunlight is low; secondly, the recombination rate of photon-generated carriers is very high, which results in low photocatalytic quantum efficiency. The key reason for these problems is that a single semiconductor photocatalytic material system has not been able to break through the performance limitations and meet the application requirements. Researches show that the composite semiconductor photocatalyst is an effective way for overcoming the defects, the photocatalytic efficiency can be effectively improved by utilizing the complementary advantages of two semiconductors, and the organic pollutants in water can be rapidly degraded.
Disclosure of Invention
Aiming at the problems, the invention provides a photocatalyst for efficiently degrading organic dye in water and a preparation method thereof.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a photocatalyst for efficiently degrading organic dye in water is prepared by uniformly loading BiOCl (bismuth oxychloride) nanosheets on WO3(tungsten oxide) on the nanofibers.
Preferably, the thickness of the BiOCl nano sheet is 10-15nm, WO3The diameter of the nano-fiber is 200-300 nm.
The preparation method of the photocatalyst for efficiently degrading the organic dye in water comprises the following steps:
(1) synthesis of WO by utilizing electrostatic spinning and calcination process in air atmosphere3A nanofiber;
(2) mixing WO3Ultrasonic dispersing of nano fiber in glycol to obtain suspension A, WO3The concentration of the nano-fiber is 0.04-0.06 mol/L; dissolving bismuth trichloride in ethylene glycol to obtain a solution B, wherein the concentration of the bismuth trichloride is 0.05-0.3 mol/L; dissolving Cetyl Trimethyl Ammonium Bromide (CTAB) in ethylene glycol to obtain a solution C, wherein the concentration of the Cetyl Trimethyl Ammonium Bromide (CTAB) is 0.02-0.04 g/mL;
(3) adding the solution B and the solution C into the suspension A, uniformly mixing, transferring the mixed solution into a hydrothermal reaction kettle, preserving the heat at the temperature of 120-140 ℃ for 8-10h, naturally cooling to room temperature, collecting, washing and drying the generated precipitate to obtain WO3the/BiOCl composite photocatalyst is the photocatalyst for degrading the organic dye in the water.
Preferably, step (1) is specifically: taking N, N-dimethylformamide as a solvent, taking ammonium metatungstate as a tungsten source, and adding polyvinylpyrrolidone to prepare a spinning solution, wherein the concentration of the ammonium metatungstate is 0.1-0.2mol/L, and the concentration of the polyvinylpyrrolidone is 0.1-0.2 g/mL; obtaining precursor nanofiber through an electrostatic spinning process; then, the precursor nano-fiber is insulated for 1-3 hours at the temperature of 500-3And (3) nano fibers.
Preferably, the electrostatic spinning process is to transfer the prepared spinning solution to a syringe with a spinneret, wherein the distance between the spinneret and a receiving plate is 20 +/-1 cm, the applied voltage is 20kV, the room temperature is controlled at 20 +/-2 ℃, and the humidity is below 30%, so as to obtain the precursor nanofiber.
Preferably, the volume ratio of the suspension A, the solution B and the solution C in the step (3) is 2:1: 1.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the photocatalyst is uniformly loaded in WO by BiOCl nanosheets3Porous nanofibersThe above constitution; wherein the thickness of the BiOCl nano-sheet is about 10nm, and WO3The diameter of the nano fiber is about 200nm, and the composite semiconductor photocatalyst has higher photocatalytic efficiency.
2、WO3the/BiOCl composite photocatalyst has a widened light absorption range, effectively improves the separation efficiency of electrons and holes, and can improve the photocatalytic activity through the synergistic effect of two semiconductors.
3. The preparation method of the photocatalyst is simple and easy to operate, has low requirements on reaction conditions, and is environment-friendly.
4. The photocatalyst can convert organic dye in water into harmless substance by using sunlight at normal temperature and normal pressure in a short time.
5. The photocatalyst has less consumption when degrading organic dye in water, can be recycled and reused, and saves cost.
Drawings
FIG. 1 shows the WO prepared in example 13BiOCl prepared in example 2 and WO prepared in example 53X-ray diffraction (XRD) pattern of/BiOCl.
FIG. 2 shows the WO prepared in example 13Scanning Electron Microscope (SEM) images of the photocatalyst.
Figure 3 shows an SEM image of the BiOCl photocatalyst prepared in example 2.
FIG. 4 shows the WO prepared in example 53SEM image of/BiOCl composite photocatalyst.
Fig. 5 is a graph showing ultraviolet-visible (UV-vis) absorption spectra of the photocatalysts prepared in example 1, example 2 and example 5.
FIG. 6 is a graph showing the change of the absorption spectrum of the photocatalyst prepared in examples 1 to 6 in which rhodamine B dye is degraded under the irradiation of a 300W xenon lamp.
FIG. 7 is a graph showing the concentration change of rhodamine B dye degraded by the catalysts prepared in examples 1-6 under the irradiation of a 300W xenon lamp.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1: WO3Preparation of nanofibers
1mmol of sodium metatungstate was dissolved in 8ml of DMF, and after stirring for half an hour, 1.0g of polyvinylpyrrolidone (PVP, K88-96) was added and stirred overnight to obtain a spinning solution. And transferring the spinning solution into an injector with a spinning nozzle, wherein the distance between the spinning nozzle and a receiving plate is 20 +/-1 cm, the applied voltage is 20kV, the room temperature is controlled at 20 +/-2 ℃, the humidity is below 30 percent, and the precursor nanofiber is obtained through the electrostatic spinning process. Finally, calcining the precursor nanofiber in air at 500 ℃ for 1 hour, and setting the heating rate to be 2 ℃/min; naturally cooling to room temperature to obtain WO3And (3) nano fibers.
Example 2: preparation of BiOCl nanosheet
1mmol of BiCl was weighed3And 0.25g of CTAB are respectively dissolved in 10mL of ethylene glycol, then the two solutions are uniformly mixed and transferred to a 50mL polytetrafluoroethylene reaction kettle, the temperature is raised to 120 ℃, the constant temperature is kept for 8h, the solution is naturally cooled to room temperature, and the generated precipitate is collected, washed and dried to obtain the BiOCl nanosheet.
Example 3: WO3Preparation of/BiOCl composite photocatalyst
Weighing 1mmol of prepared WO3Ultrasonically dispersing the nano-fibers in 20mL of glycol to prepare a suspension to obtain a suspension A; 0.5mmol of BiCl was weighed simultaneously3Dissolving in 10ml of ethylene glycol to obtain a solution B; 0.2g of cetyltrimethylammonium bromide (CTAB) is weighed and dissolved in 10mL of ethylene glycol to obtain a solution C; then adding the solution B and the solution C into the suspension A, stirring uniformly, transferring into a hydrothermal reaction kettle, keeping the constant temperature of 120 ℃ for 8 hours, naturally cooling to room temperature, collecting, washing and drying the generated precipitate to obtain WO3/BiOCl composite photocatalyst, sampleMarker WO3/BiOCl(0.5)。
Example 4: WO3Preparation of/BiOCl composite photocatalyst
Weighing 1mmol of prepared WO3Ultrasonically dispersing the nano-fibers in 20mL of glycol to prepare a suspension to obtain a suspension A; simultaneously weighing 1mmol of BiCl3Dissolving in 10ml of ethylene glycol to obtain a solution B; 0.2g of cetyltrimethylammonium bromide (CTAB) is weighed and dissolved in 10mL of ethylene glycol to obtain a solution C; then adding the solution B and the solution C into the suspension A, stirring uniformly, transferring into a hydrothermal reaction kettle, keeping the constant temperature of 120 ℃ for 8 hours, naturally cooling to room temperature, collecting, washing and drying the generated precipitate to obtain WO3The sample of the/BiOCl composite photocatalyst is marked as WO3/BiOCl(1)。
Example 5: WO3Preparation of/BiOCl composite photocatalyst
Weighing 1mmol of prepared WO3Ultrasonically dispersing the nano-fibers in 20mL of glycol to prepare a suspension to obtain a suspension A; 2mmol of BiCl were simultaneously weighed3Dissolving in 10ml of ethylene glycol to obtain a solution B; 0.2g of cetyltrimethylammonium bromide (CTAB) is weighed and dissolved in 10mL of ethylene glycol to obtain a solution C; then adding the solution B and the solution C into the suspension A, stirring uniformly, transferring into a hydrothermal reaction kettle, keeping the constant temperature of 120 ℃ for 8 hours, naturally cooling to room temperature, collecting, washing and drying the generated precipitate to obtain WO3The sample of the/BiOCl composite photocatalyst is marked as WO3/BiOCl(2)。
Example 6: WO3Preparation of/BiOCl composite photocatalyst
Weighing 1mmol of prepared WO3Ultrasonically dispersing the nano-fibers in 20mL of glycol to prepare a suspension to obtain a suspension A; 3mmol of BiCl were simultaneously weighed3Dissolving in 10ml of ethylene glycol to obtain a solution B; 0.2g of cetyltrimethylammonium bromide (CTAB) is weighed and dissolved in 10mL of ethylene glycol to obtain a solution C; then adding the solution B and the solution C into the suspension A, stirring uniformly, transferring into a hydrothermal reaction kettle, keeping the constant temperature of 120 ℃ for 8 hours, naturally cooling to room temperature, and mixing the raw materialsCollecting, washing and drying the precipitate to obtain the WO3The sample of the/BiOCl composite photocatalyst is marked as WO3/BiOCl(3)。
From the XRD pattern shown in FIG. 1, it can be seen that WO3Nanofiber, BiOCl nanosheet and WO3WO with/BiOCl composite photocatalysts respectively corresponding to monoclinic phases3BiOCl in the tetragonal phase and a composite of the two substances, without other impurities.
The SEM image shown in FIG. 2 shows that WO3The diameter of the nano fiber is about 200nm, and the nano fiber is assembled by a large number of nano particles and presents a porous structure with a rough surface.
The SEM chart shown in figure 3 indicates that the BiOCl nanoplate thickness is about 10 nm.
As can be seen from the SEM image shown in FIG. 4, WO3the/BiOCl composite photocatalyst is formed by uniformly growing BiOCl nanosheets in WO3And nanofibers.
As can be seen from FIG. 5, WO3the/BiOCl composite photocatalyst has a wider light absorption range.
And (3) performance testing:
WO3the operation steps of photocatalytic degradation of rhodamine B in water by using the BiOCl composite photocatalyst are as follows:
(a) weighing 25mg of catalyst to disperse into 50mL of rhodamine B aqueous solution, wherein the initial concentration of rhodamine B is 25 mg/L;
(b) stirring for 1 hour in a dark place, irradiating by using a 300W xenon lamp, absorbing 3mL of solution from a reaction system at intervals of a certain time, filtering by using a filter membrane, and measuring the absorption spectrum of the solution by using an ultraviolet-visible spectrophotometer;
(c) the intensity of the characteristic absorption peak of rhodamine B at 550nm is directly proportional to the concentration of rhodamine B in the solution, so that the degradation rate (%) of rhodamine B is calculated to be 1-C/C according to the intensity change of the 550nm absorption peak in the measured solution absorption spectrum0＝1-A/A0。
Wherein C is0And A0The initial concentration of rhodamine B in water before illumination and the absorbance of rhodamine B at 550nm, and C and A are the concentration of rhodamine B in water after illumination for a certain time and the absorbance of rhodamine B at 550 nm.
FIG. 6 shows the change of the absorption spectrum of the rhodamine solution with the irradiation time in the process of degrading rhodamine in water by using the photocatalysts respectively prepared in examples 1 to 6 under the irradiation of a 300W xenon lamp. In WO3Under the action of the/BiOCl composite photocatalyst, the characteristic absorption intensity of rhodamine gradually decreases along with the prolonging of the irradiation time until the rhodamine disappears.
FIG. 7 shows the relative concentration (C/C) of rhodamine in water during degradation of rhodamine under 300W xenon lamp irradiation using photocatalysts prepared in examples 1 to 6 respectively0) According to the curve changing along with the irradiation time, the optimal catalyst can lead the degradation rate of rhodamine in water to reach 94.84% in only 10 minutes.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. The photocatalyst for efficiently degrading the organic dye in water is characterized in that the photocatalyst is uniformly loaded in WO by BiOCl nanosheets3On the nano-fiber;
the preparation method comprises the following steps:
(1) synthesis of WO by utilizing electrostatic spinning and calcination process in air atmosphere3A nanofiber;
(2) mixing WO3Ultrasonic dispersing of nano fiber in glycol to obtain suspension A, WO3The concentration of the nano-fiber is 0.04-0.06 mol/L; dissolving bismuth trichloride in ethylene glycol to obtain a solution B, wherein the concentration of the bismuth trichloride is 0.05-0.3 mol/L; dissolving cetyl trimethyl ammonium bromide in ethylene glycol to obtain a solution C, wherein the concentration of the cetyl trimethyl ammonium bromide is 0.02-0.04 g/mL;
(3) adding the solution B and the solution C into the suspension A, and after uniformly mixing the solution B and the solution C, adding the solution B and the solution C into the suspension ATransferring the mixed solution to a hydrothermal reaction kettle, preserving the heat for 8-10h at the temperature of 120-3the/BiOCl composite photocatalyst is the photocatalyst for degrading the organic dye in the water.
2. The photocatalyst for efficiently degrading organic dye in water according to claim 1, wherein the thickness of the BiOCl nanosheet is 10-15nm, and WO is3The diameter of the nano-fiber is 200-300 nm.
3. The photocatalyst for efficiently degrading the organic dye in water according to claim 1, wherein the step (1) is specifically as follows: taking N, N-dimethylformamide as a solvent, taking ammonium metatungstate as a tungsten source, and adding polyvinylpyrrolidone to prepare a spinning solution, wherein the concentration of the ammonium metatungstate is 0.1-0.2mol/L, and the concentration of the polyvinylpyrrolidone is 0.1-0.2 g/mL; obtaining precursor nanofiber through an electrostatic spinning process; then, the precursor nano-fiber is insulated for 1-3 hours at the temperature of 500-3And (3) nano fibers.
4. The photocatalyst for efficiently degrading the organic dye in water according to claim 3, wherein the electrostatic spinning process comprises transferring the prepared spinning solution into a syringe with a spinneret, wherein the distance between the spinneret and a receiving plate is 20 +/-1 cm, the applied voltage is 20kV, the room temperature is controlled at 20 +/-2 ℃, and the humidity is below 30%, and the precursor nanofiber is obtained by spinning.
5. The photocatalyst for degrading the organic dye in water with high efficiency according to claim 1, wherein the volume ratio of the suspension A, the solution B and the solution C in the step (3) is 2:1: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910395357.7A CN109985644B (en) | 2019-05-13 | 2019-05-13 | Photocatalyst for efficiently degrading organic dye in water and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910395357.7A CN109985644B (en) | 2019-05-13 | 2019-05-13 | Photocatalyst for efficiently degrading organic dye in water and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109985644A CN109985644A (en) | 2019-07-09 |
| CN109985644B true CN109985644B (en) | 2021-12-07 |
Family
ID=67136700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910395357.7A Active CN109985644B (en) | 2019-05-13 | 2019-05-13 | Photocatalyst for efficiently degrading organic dye in water and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109985644B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110368962B (en) * | 2019-07-31 | 2022-02-18 | 西安建筑科技大学 | BiOI/WO3Preparation method, product and application of heterojunction efficient photoelectrocatalysis electrode |
| CN111254461B (en) * | 2020-01-19 | 2021-08-27 | 安徽大学 | Tungsten oxide/bismuth oxyiodide heterojunction material for photo-reduction of carbon dioxide and preparation method and application thereof |
| CN111939948A (en) * | 2020-09-01 | 2020-11-17 | 陕西科技大学 | BiOCl-WO3Preparation method of composite photocatalyst |
| CN115779973B (en) * | 2022-11-28 | 2024-02-02 | 松山湖材料实验室 | PAN\BiOBr\W 18 O 49 Heterojunction nanofiber photocatalyst and preparation method and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103657692A (en) * | 2013-11-22 | 2014-03-26 | 华东师范大学 | Compound bismuthyl bromide photocatalyst |
| CN105040161A (en) * | 2015-07-22 | 2015-11-11 | 宁波工程学院 | Preparation method of high purity WO<3> mesoporous nano-belt |
| CN105709782A (en) * | 2016-03-09 | 2016-06-29 | 安徽工业大学 | Preparing method and application of Ag/AgBr/BiOCl-(001) nanometer composite material |
| CN107837807A (en) * | 2017-11-01 | 2018-03-27 | 浙江海洋大学 | A kind of WO3/Bi2MoO6Composite photocatalyst material and preparation method thereof |
| CN109286021A (en) * | 2018-07-24 | 2019-01-29 | 南京航空航天大学 | Two-dimentional g-C3N4/WO3/ carbon cloth combination electrode and its preparation method and application |
-
2019
- 2019-05-13 CN CN201910395357.7A patent/CN109985644B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103657692A (en) * | 2013-11-22 | 2014-03-26 | 华东师范大学 | Compound bismuthyl bromide photocatalyst |
| CN105040161A (en) * | 2015-07-22 | 2015-11-11 | 宁波工程学院 | Preparation method of high purity WO<3> mesoporous nano-belt |
| CN105709782A (en) * | 2016-03-09 | 2016-06-29 | 安徽工业大学 | Preparing method and application of Ag/AgBr/BiOCl-(001) nanometer composite material |
| CN107837807A (en) * | 2017-11-01 | 2018-03-27 | 浙江海洋大学 | A kind of WO3/Bi2MoO6Composite photocatalyst material and preparation method thereof |
| CN109286021A (en) * | 2018-07-24 | 2019-01-29 | 南京航空航天大学 | Two-dimentional g-C3N4/WO3/ carbon cloth combination electrode and its preparation method and application |
Non-Patent Citations (2)
| Title |
|---|
| Synthesis and enhanced visible light photocatalytic activity of WO3-BiOClxBr1-x heterojunctions with tunable energy band structure;Yi Ling Qi，等;《Ceramics International》;20170615;第12302-12310页 * |
| Yi Ling Qi，等.Synthesis and enhanced visible light photocatalytic activity of WO3-BiOClxBr1-x heterojunctions with tunable energy band structure.《Ceramics International》.2017,第12302-12310页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109985644A (en) | 2019-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109985644B (en) | Photocatalyst for efficiently degrading organic dye in water and preparation method thereof | |
| Hu et al. | Direct electrospinning method for the construction of Z-scheme TiO2/g-C3N4/RGO ternary heterojunction photocatalysts with remarkably ameliorated photocatalytic performance | |
| Qu et al. | Visible-light-responsive K-doped g-C3N4/BiOBr hybrid photocatalyst with highly efficient degradation of Rhodamine B and tetracycline | |
| Sun et al. | Effect of contact interface between TiO2 and g-C3N4 on the photoreactivity of g-C3N4/TiO2 photocatalyst:(0 0 1) vs (1 0 1) facets of TiO2 | |
| CN107398293B (en) | Fibrous Z-shaped photocatalyst TiO for treating organic sewage2/g-C3N4Preparation method of (1) | |
| CN107456987B (en) | Method for preparing carbon nitride/titanium dioxide heterojunction photocatalyst by electrostatic spinning one-step method | |
| CN110152711B (en) | CeO (CeO)2@MoS2/g-C3N4Ternary composite photocatalyst and preparation method thereof | |
| CN105032468A (en) | Cu2O-TiO2/g-C3N4 ternary complex and preparation and application method thereof | |
| CN106076384B (en) | A kind of tri compound catalysis material and its preparation method and application | |
| CN103611531A (en) | Preparation method and application of silver oxide/titanium dioxide composite nanofiber photocatalyst | |
| CN109985618B (en) | H occupies BiVO4-OVs photocatalytic material, preparation method and application thereof | |
| CN113680221B (en) | Preparation method of composite membrane for photocatalysis-photothermal membrane distillation | |
| CN112619659B (en) | Nickel oxide nanosheet and bismuth molybdate nanofiber heterojunction photocatalytic material as well as preparation method and application thereof | |
| Bai et al. | Self-standing Ag2O@ YSZ-TiO2 pn nanoheterojunction composite nanofibrous membranes with superior photocatalytic activity | |
| CN105664922B (en) | Carbon modifies TiO2/WO3Composite nano-fiber photocatalyst, preparation method and application | |
| CN102895965A (en) | Er<3+>: Y3Al5O12/TiO2 composite membrane and application thereof in catalytic degradation of organic dye | |
| CN106423216B (en) | A kind of carbon quantum dot CQDs hydridization CdIn2S4The preparation method and applications of composite material | |
| Yan et al. | Construction of novel ternary dual Z-scheme Ag3VO4/C3N4/reduced TiO2 composite with excellent visible-light photodegradation activity | |
| CN110327914B (en) | Tungsten trioxide/cadmium tungstate nanofiber photocatalytic material and preparation method and application thereof | |
| Teng et al. | Remarkably enhanced photodegradation of organic pollutants by NH2-UiO-66/ZnO composite under visible-light irradiation | |
| CN110404524A (en) | Carbon quantum dot/titanium dioxide composite photocatalyst preparation method and applications | |
| Li et al. | Construction of S-scheme heterostructured TiO2/g-C3N4 composite microspheres with sunlight-driven photocatalytic activity | |
| CN113908855A (en) | Preparation method of supported porous photocatalytic fiber membrane | |
| CN106140132A (en) | A kind of Pr3+: Y2siO5/ TiO2/ ACF visible light responsive photocatalytic composite membrane and preparation method thereof | |
| CN110624520A (en) | W18O49Modified polymer composite nanofiber membrane, preparation method and application of modified polymer composite nanofiber membrane in aspect of degrading organic pollutants |
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 | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220817 Address after: No. 317, 3rd Floor, Building 6, Yard A, No. 1, Guanghua Road, Tongzhou District, Beijing 100000 Patentee after: Beijing Donglei Hengye Environmental Protection Technology Co.,Ltd. Address before: 310018 No. 2 street, Baiyang street, Hangzhou economic and Technological Development Zone, Zhejiang 928 Patentee before: ZHEJIANG SCI-TECH University |
|
| TR01 | Transfer of patent right |