CN109985644A - The photochemical catalyst and preparation method thereof of organic dyestuff in a kind of efficient degradation water - Google Patents
The photochemical catalyst and preparation method thereof of organic dyestuff in a kind of efficient degradation water Download PDFInfo
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- CN109985644A CN109985644A CN201910395357.7A CN201910395357A CN109985644A CN 109985644 A CN109985644 A CN 109985644A CN 201910395357 A CN201910395357 A CN 201910395357A CN 109985644 A CN109985644 A CN 109985644A
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- 239000003054 catalyst Substances 0.000 title claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 230000015556 catabolic process Effects 0.000 title claims abstract description 22
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 22
- 239000000975 dye Substances 0.000 title claims abstract description 21
- BWOROQSFKKODDR-UHFFFAOYSA-N oxobismuth;hydrochloride Chemical compound Cl.[Bi]=O BWOROQSFKKODDR-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000002121 nanofiber Substances 0.000 claims abstract description 33
- 239000002131 composite material Substances 0.000 claims abstract description 19
- 239000011941 photocatalyst Substances 0.000 claims abstract description 19
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Substances OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 55
- 239000007788 liquid Substances 0.000 claims description 15
- 238000009987 spinning Methods 0.000 claims description 12
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 11
- 238000000034 method 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
- 238000010041 electrostatic spinning Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 6
- 239000013049 sediment Substances 0.000 claims description 6
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 5
- 235000013855 polyvinylpyrrolidone Nutrition 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
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000001354 calcination Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000002904 solvent Substances 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
- 229940073609 bismuth oxychloride Drugs 0.000 abstract description 2
- 150000001875 compounds Chemical class 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
- 229910001930 tungsten oxide Inorganic materials 0.000 abstract description 2
- 230000004913 activation Effects 0.000 abstract 1
- 230000003197 catalytic effect Effects 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 36
- 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 15
- 229940043267 rhodamine b Drugs 0.000 description 8
- 230000001699 photocatalysis Effects 0.000 description 7
- 238000007146 photocatalysis Methods 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 239000004065 semiconductor 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
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- AISMNBXOJRHCIA-UHFFFAOYSA-N trimethylazanium;bromide Chemical compound Br.CN(C)C AISMNBXOJRHCIA-UHFFFAOYSA-N 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 238000000862 absorption spectrum Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000004043 dyeing Methods 0.000 description 3
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- DCAYPVUWAIABOU-UHFFFAOYSA-N hexadecane Chemical compound CCCCCCCCCCCCCCCC DCAYPVUWAIABOU-UHFFFAOYSA-N 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000004020 conductor Substances 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
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 231100000734 genotoxic potential Toxicity 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
- 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
- 238000011017 operating method Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000003403 water pollutant Substances 0.000 description 1
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
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/40—Catalysts, in general, characterised by their form or physical properties characterised by dimensions, e.g. grain size
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Catalysts (AREA)
Abstract
The present invention relates to nano-photocatalyst technical fields, and in particular to the photochemical catalyst and preparation method thereof of organic dyestuff, the catalyst are made of on tungsten oxide nanofibers bismuth oxychloride nanometer sheet uniform load in a kind of efficient degradation water；The BiOCl nanometer sheet thickness is 10-15nm, WO3Nanofiber diameter is 200-300nm；WO of the present invention3/ BiOCl composite photo-catalyst has the light abstraction width widened, it restrained effectively the compound of photo-generate electron-hole pair, also substantially increase superficial catalytic activation simultaneously, can under sunlight irradiation organic dyestuff in fast degradation water, and photochemical catalyst is easily recycled recycling.
Description
Technical field
The present invention relates to nano-photocatalyst technical fields, and in particular to the light of organic dyestuff is urged in a kind of efficient degradation water
Agent and preparation method thereof.
Background technique
With the high speed development of modern industry, environmental pollution is on the rise, and the pollution of especially water resource is more serious.In
State is that maximum textile producing country, the wastewater discharge and the total amount of pollutant of China's dyeing occupy the whole nation respectively in the world
The second of industrial department and the 4th, it is one of China's emphasis pollution industry.Waste water from dyestuff has high organic content, structure multiple
Miscellaneous, the features such as biological degradability is low, all has genotoxic potential mostly, is detrimental to health.Therefore, develop the depth of dyeing waste water
Processing method further decreases the concentration of water pollutant, the sustainable development to alleviating water resources crisis, maintaining dyeing
It is of great significance.
In recent years, photocatalysis technology is applied to some persistent organic pollutants in degradation water, achieves remarkable effect.
Light-catalyzed reaction can utilize luminous energy by hardly degraded organic substance oxygenolysis Cheng Shui, CO at normal temperatures and pressures2And inorganic salts, make organic
The even permineralization of object part is at inorganic molecules, to realize the deep purifying of waste water.However, the application of photocatalysis technology is still
It is limited to the efficient photochemical catalyst of Development of Novel.There are still two critical issues in current semiconductor light-catalyst: first is that
For the photoresponse wave-length coverage of most of photochemical catalyst mainly in ultra-violet (UV) band, the utilization rate of sunlight is low；Second is that photo-generated carrier
Recombination rate is very high, causes photocatalysis quantum efficiency low.And the key reason of these problems is single conductor photocatalysis material
System already can not limitation on breakthrough performance and meet using it is upper the needs of.Research shows that composite semiconductor light-catalyst is gram
The effective way for taking these disadvantages can effectively improve photocatalysis efficiency using the mutual supplement with each other's advantages of two kinds of semiconductors, realize fast
Prompt drop solution organic pollutants.
Summary of the invention
In view of the above problems, the invention proposes a kind of photochemical catalyst of organic dyestuff in efficient degradation water and its
Preparation method.
In order to achieve the above object, the present invention is achieved by the following technical programs:
The photochemical catalyst of organic dyestuff, the catalyst are equal by BiOCl (bismuth oxychloride) nanometer sheet in a kind of efficient degradation water
It is even to be supported on WO3It is constituted on (tungsten oxide) nanofiber.
Preferably, the BiOCl nanometer sheet thickness is 10-15nm, WO3Nanofiber diameter is 200-300nm.
In the present invention, its step are as follows for the preparation method of the photochemical catalyst of organic dyestuff in efficient degradation water:
(1) WO is synthesized using calcination process under electrostatic spinning and air atmosphere3Nanofiber；
(2) by WO3Nanofiber ultrasonic disperse obtains suspending liquid A, WO in ethylene glycol3The concentration of nanofiber is 0.04-
0.06mol/L；Bismuth trichloride is dissolved in ethylene glycol and obtains solution B, the concentration of bismuth trichloride is 0.05-0.3mol/L；It will
Cetyl trimethylammonium bromide (CTAB), which is dissolved in ethylene glycol, obtains solution C, cetyl trimethylammonium bromide (CTAB)
Concentration is 0.02-0.04g/mL；
(3) solution B and solution C are added in suspending liquid A, after mixing, mixed liquor are transferred to hydrothermal reaction kettle
In, sediment collection, washing and the drying of generation are obtained WO by 120-140 DEG C of heat preservation 8-10h, cooled to room temperature3/
BiOCl composite photo-catalyst, as it is described degradation water in organic dyestuff photochemical catalyst.
Preferably, step (1) specifically: using in n,N-Dimethylformamide be solvent, ammonium metatungstate gathers as tungsten source, addition
Vinylpyrrolidone is configured to spinning solution, and wherein the concentration of ammonium metatungstate is 0.1-0.2mol/L, polyvinylpyrrolidone
Concentration is 0.1-0.2g/mL；Presoma nanofiber is obtained by electrostatic spinning process；Then, presoma nanofiber is existed
500-600 DEG C heat preservation 1-3 hours, last cooled to room temperature to get arrive WO3Nanofiber.
Preferably, electrostatic spinning process is that prepared spinning solution is transferred in the syringe with spinning head, spray
Silk the distance between head and receiver board are 20 ± 1cm, and applications voltage is 20kV, control room temperature at 20 ± 2 DEG C, humidity 30% with
Under, spinning obtains presoma nanofiber.
Preferably, the volume ratio of suspending liquid A, solution B and solution C is 2:1:1 in step (3).
Due to using above-mentioned technical solution, the beneficial effects of the present invention are:
1, photochemical catalyst of the present invention is by BiOCl nanometer sheet uniform load in WO3It is constituted on porous nano-fibre；Wherein,
BiOCl nanometer sheet thickness is about 10nm, WO3The diameter of nanofiber is about 200nm, and composite semiconductor light-catalyst has higher
Photocatalysis efficiency.
2、WO3/ BiOCl composite photo-catalyst has the light abstraction width widened, and effectively improves the separation of electron-hole
Efficiency, and photocatalytic activity can be improved by the synergistic effect between two kinds of semiconductors.
3, the preparation method of photochemical catalyst of the present invention is simply easily operated, of less demanding to reaction condition, and environmental-friendly.
4, photochemical catalyst of the present invention, which can utilize, converts organic dyestuff in water in the sunlight short time at normal temperatures and pressures
For innocuous substance.
5, dosage is few when organic dyestuff in water of degrading for photochemical catalyst of the present invention, can be recycled and reuses, save the cost.
Detailed description of the invention
Fig. 1 show the WO for applying the preparation of example 13, apply example 2 preparation BiOCl and apply example 5 preparation WO3The X-ray of/BiOCl
Diffraction (XRD) figure.
Fig. 2 show the WO of the preparation of embodiment 13Scanning electron microscope (SEM) figure of photochemical catalyst.
Fig. 3 show the SEM figure of the BiOCl photochemical catalyst of the preparation of embodiment 2.
Fig. 4 show the WO of the preparation of embodiment 53The SEM of/BiOCl composite photo-catalyst schemes.
The ultraviolet-visible (UV-vis) that Fig. 5 show photochemical catalyst prepared by embodiment 1, embodiment 2 and embodiment 5 is inhaled
Receive spectrogram.
Fig. 6 is the absorption light of the photochemical catalyst degradation dye, rhodamine B under the irradiation of 300W xenon lamp prepared in embodiment 1-6
Compose variation diagram.
Fig. 7 is the concentration variation of the catalyst degradation dye, rhodamine B under the irradiation of 300W xenon lamp prepared in embodiment 1-6
Figure.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention,
Technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is the present invention one
Divide embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of creative work.
Embodiment 1:WO3The preparation of nanofiber
1mmol metatungstic acid is received and is dissolved in 8ml DMF, after stirring half an hour, 1.0g polyvinylpyrrolidone is added
(PVP, K88-96), is stirred overnight, and obtains spinning solution.Spinning solution is transferred in the syringe with spinning head, spinneret
Head is 20 ± 1cm with the distance between receiver board, and applications voltage is 20kV, control room temperature 20 ± 2 DEG C, humidity 30% hereinafter,
Presoma nanofiber is obtained through electrostatic spinning process.Finally presoma nanofiber is calcined 1 hour for 500 DEG C in air,
Setting heating rate is 2 DEG C/min；Cooled to room temperature to get arrive WO3Nanofiber.
The preparation of embodiment 2:BiOCl nanometer sheet
Weigh the BiCl of 1mmol3It is dissolved separately in 10mL ethylene glycol with the CTAB of 0.25g, it then will be above two molten
Liquid is uniformly mixed and is transferred in 50mL ptfe autoclave, after being warming up to 120 DEG C of constant temperature holding 8h, naturally cools to room
The sediment collection, washing, drying of generation are arrived BiOCl nanometer sheet by temperature.
Embodiment 3:WO3The preparation of/BiOCl composite photo-catalyst
Weigh WO prepared by 1mmol3Nanofiber ultrasonic disperse is configured to suspension in the ethylene glycol of 20mL, obtains
Suspending liquid A；The BiCl of 0.5mmol is weighed simultaneously3It is dissolved in 10ml ethylene glycol, obtains solution B；And weigh the hexadecane of 0.2g
Base trimethylammonium bromide (CTAB) is dissolved in 10mL ethylene glycol, arrives solution C；Then, above-mentioned solution B and solution C are added to
It in suspending liquid A, stirs evenly, is transferred in hydrothermal reaction kettle, 120 DEG C of constant temperature keep 8h, cooled to room temperature, by generation
Sediment is collected, washs and dries to arrive WO3/ BiOCl composite photo-catalyst, sample are labeled as WO3/BiOCl(0.5)。
Embodiment 4:WO3The preparation of/BiOCl composite photo-catalyst
Weigh WO prepared by 1mmol3Nanofiber ultrasonic disperse is configured to suspension in the ethylene glycol of 20mL, obtains
Suspending liquid A；The BiCl of 1mmol is weighed simultaneously3It is dissolved in 10ml ethylene glycol, obtains solution B；And weigh the cetyl of 0.2g
Trimethylammonium bromide (CTAB) is dissolved in 10mL ethylene glycol, arrives solution C；Then, above-mentioned solution B and solution C are added to outstanding
It in supernatant liquid A, stirs evenly, is transferred in hydrothermal reaction kettle, 120 DEG C of constant temperature keep 8h, cooled to room temperature, by the heavy of generation
Starch collects, washs and dries to arrive WO3/ BiOCl composite photo-catalyst, sample are labeled as WO3/BiOCl(1)。
Embodiment 5:WO3The preparation of/BiOCl composite photo-catalyst
Weigh WO prepared by 1mmol3Nanofiber ultrasonic disperse is configured to suspension in the ethylene glycol of 20mL, obtains
Suspending liquid A；The BiCl of 2mmol is weighed simultaneously3It is dissolved in 10ml ethylene glycol, obtains solution B；And weigh the cetyl of 0.2g
Trimethylammonium bromide (CTAB) is dissolved in 10mL ethylene glycol, arrives solution C；Then, solution B and solution C are added to suspending liquid A
In, it stirs evenly, is transferred in hydrothermal reaction kettle, 120 DEG C of constant temperature keep 8h, cooled to room temperature, by the sediment of generation
It collects, wash and dries to get WO is arrived3/ BiOCl composite photo-catalyst, sample are labeled as WO3/BiOCl(2)。
Embodiment 6:WO3The preparation of/BiOCl composite photo-catalyst
Weigh WO prepared by 1mmol3Nanofiber ultrasonic disperse is configured to suspension in the ethylene glycol of 20mL, obtains
Suspending liquid A；The BiCl of 3mmol is weighed simultaneously3It is dissolved in 10ml ethylene glycol, obtains solution B；And weigh the cetyl of 0.2g
Trimethylammonium bromide (CTAB) is dissolved in 10mL ethylene glycol, arrives solution C；Then, solution B and solution C are added to suspending liquid A
In, it stirs evenly, is transferred in hydrothermal reaction kettle, 120 DEG C of constant temperature keep 8h, cooled to room temperature, by the sediment of generation
It collects, wash and dries to get WO is arrived3/ BiOCl composite photo-catalyst, sample are labeled as WO3/BiOCl(3)。
As can be seen that WO from XRD diagram shown in FIG. 13Nanofiber, BiOCl nanometer sheet and WO3/ BiOCl complex light is urged
Agent corresponds respectively to the WO of monocline crystal phase3, the BiOCl of tetragonal phase and the compound of above two substance, it is not other
Impurity.
The bright WO of SEM chart shown in Fig. 23Nanofiber diameter about 200nm, is assembled by a large amount of nanoparticles, is presented
Shaggy porous structure.
The bright BiOCl nanometer sheet thickness about 10nm of SEM chart shown in Fig. 3.
From SEM shown in Fig. 4 figure as can be seen that WO3/ BiOCl composite photo-catalyst is by BiOCl nanometer sheet homoepitaxial
In WO3It is constituted on nanofiber.
From fig. 5, it can be seen that WO3/ BiOCl composite photo-catalyst has broader light abstraction width.
Performance test:
WO3The operating procedure of rhodamine B in/BiOCl composite photo-catalyst photocatalytic degradation water:
(a) it weighs 25mg catalyst to be distributed in the aqueous solution of 50mL rhodamine B, wherein the initial concentration of rhodamine B is
25mg/L；
(b) it after stirring 1 hour in the dark, is irradiated with 300W xenon lamp, draws 3mL from reaction system at interval of certain time
Then solution measures the absorption spectrum of solution with filter membrane mistake with ultraviolet-visible spectrophotometer；
(c) rhodamine B is directly proportional to its concentration in the solution in the intensity of 550nm characteristic absorption peak, therefore according to institute
The Strength Changes for surveying 550nm absorption peak in solution absorption spectra calculate degradation rate (%)=1-C/C of rhodamine B0=1-A/A0。
Wherein C0And A0It is initial concentration of the rhodamine B in water and its absorbance in 550nm before illumination, C and A are illumination
The concentration of rhodamine B in water and its absorbance in 550nm after a certain period of time.
The mistake of the photochemical catalyst that Fig. 6 is prepared respectively using embodiment 1-6 rhodamine in degradation water in the case where 300W xenon lamp irradiates
Cheng Zhong, the absorption spectrum of rhodamine liquor with irradiation time situation of change.In WO3The effect of/BiOCl composite photo-catalyst
Under, as irradiation time extends, the characteristic absorption intensity of rhodamine is gradually decreased, until disappearing.
Fig. 7 is that the photochemical catalyst that is prepared respectively using embodiment 1-6 is degraded rhodamine in water under the irradiation of 300W xenon lamp
Relative concentration (the C/C of rhodamine in the process0) with the curve of irradiation time variation, optimal catalyst only needs can just make for 10 minutes
The degradation rate of rhodamine reaches 94.84% in water.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (6)
1. the photochemical catalyst of organic dyestuff in a kind of efficient degradation water, which is characterized in that the catalyst is uniform by BiOCl nanometer sheet
It is supported on WO3It is constituted on nanofiber.
2. the photochemical catalyst of organic dyestuff in efficient degradation water according to claim 1, which is characterized in that the BiOCl
Nanometer sheet thickness is 10-15nm, WO3Nanofiber diameter is 200-300nm.
3. the preparation method of the photochemical catalyst of organic dyestuff, feature exist in efficient degradation water according to claim 1 or 2
In steps are as follows:
(1) WO is synthesized using calcination process under electrostatic spinning and air atmosphere3Nanofiber；
(2) by WO3Nanofiber ultrasonic disperse obtains suspending liquid A, WO in ethylene glycol3The concentration of nanofiber is 0.04-
0.06mol/L；Bismuth trichloride is dissolved in ethylene glycol and obtains solution B, the concentration of bismuth trichloride is 0.05-0.3mol/L；It will
Cetyl trimethylammonium bromide, which is dissolved in ethylene glycol, obtains solution C, and the concentration of cetyl trimethylammonium bromide is 0.02-
0.04g/mL；
(3) solution B and solution C are added in suspending liquid A, after mixing, mixed liquor are transferred in hydrothermal reaction kettle,
Sediment collection, washing and the drying of generation are obtained WO by 120-140 DEG C of heat preservation 8-10h, cooled to room temperature3/BiOCl
Composite photo-catalyst, as it is described degradation water in organic dyestuff photochemical catalyst.
4. the preparation method of the photochemical catalyst of organic dyestuff in efficient degradation water according to claim 3, which is characterized in that
Step (1) specifically: using in N,N-dimethylformamide be solvent, ammonium metatungstate is matched as tungsten source, addition polyvinylpyrrolidone
Spinning solution is made, wherein the concentration of ammonium metatungstate is 0.1-0.2mol/L, the concentration of polyvinylpyrrolidone is 0.1-0.2g/
mL；Presoma nanofiber is obtained by electrostatic spinning process；Then, by presoma nanofiber in 500-600 DEG C of heat preservation 1-3
Hour, last cooled to room temperature to get arrive WO3Nanofiber.
5. the preparation method of the photochemical catalyst of organic dyestuff in efficient degradation water according to claim 4, which is characterized in that
Electrostatic spinning process is that prepared spinning solution is transferred in the syringe with spinning head, between spinning head and receiver board
Distance be 20 ± 1cm, applications voltage be 20kV, control room temperature at 20 ± 2 DEG C, humidity 30% is hereinafter, spinning obtains presoma
Nanofiber.
6. the preparation method of the photochemical catalyst of organic dyestuff in efficient degradation water according to claim 3, which is characterized in that
The volume ratio of suspending liquid A, solution B and solution C is 2:1:1 in step (3).
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