CN116037167A - BiOBr/MoS 2 Preparation method and application of photocatalyst - Google Patents

BiOBr/MoS 2 Preparation method and application of photocatalyst Download PDF

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CN116037167A
CN116037167A CN202211665478.7A CN202211665478A CN116037167A CN 116037167 A CN116037167 A CN 116037167A CN 202211665478 A CN202211665478 A CN 202211665478A CN 116037167 A CN116037167 A CN 116037167A
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biobr
mos
solution
photocatalyst
stirring
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包红旭
马修文
江世杰
陈晨
殷万欣
潘晨晨
高萌
欧阳明燚
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Liaoning University
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • 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
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    • B01J27/132Halogens; Compounds thereof with chromium, molybdenum, tungsten or polonium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
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    • B01J35/30Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/39Photocatalytic properties
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    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/30Treatment of water, waste water, or sewage by irradiation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/308Dyes; Colorants; Fluorescent agents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/38Organic compounds containing nitrogen
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00Use of specific compounds during water treatment
    • C02F2305/10Photocatalysts
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/30Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37Wastewater or sewage treatment systems using renewable energies using solar energy

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Abstract

The invention relates to a BiOBr/MoS 2 A preparation method and application of a photocatalyst. Cetyl Trimethyl Ammonium Bromide (CTAB) is used as a bromine source, and under the action of glycol, a hydrothermal method is adopted to successfully prepare BiOBr/MoS 2 A photocatalyst. Not only is beneficial to the penetration and absorption of light, but also is beneficial to the separation and recovery of the catalyst. Reacting for 60min under visible light, wherein the degradation rate of rhodamine B solution with the concentration of 10mg/L is 100 percent, and the BiOBr/MoS is prepared 2 For rhodamine B solutionThe degradation effect is improved compared with BiOBr. At the same time, biOBr/MoS 2 The material has the advantages of self stability, no inactivation and passivation after repeated use, good catalytic activity and good application prospect in the aspect of printing and dyeing wastewater treatment.

Description

BiOBr/MoS 2 Preparation method and application of photocatalyst
Technical Field
The invention belongs to the technical field of catalysts, and in particular relates to a BiOBr/MoS 2 A preparation method and application of a photocatalyst.
Background
Printing and dyeing wastewater is one of main pollution sources of Chinese industrial wastewater, and causes great threat to the safety of water body environment. The amount and quality of the printing and dyeing wastewater are unstable, and when the printing and dyeing process and raw materials are changed, the quality of the water is also changed. The printing and dyeing wastewater has larger harm, has the risks of cancerogenic, mutagenic, teratogenic and the like on harmful substances of organisms, has adverse effects on ecological environment safety, and finally threatens the safety of human beings. The dye in the printing and dyeing wastewater can block the sunlight and influence the normal life activity demands of water organisms. Thus, developing effective, economical and applicable techniques to eliminate these contaminants remains a significant challenge.
Photocatalysis is a chemical oxidation technology, and has been applied to treatment of printing and dyeing wastewater due to the characteristics of economy, energy conservation, high efficiency, environmental protection and the like. In recent years, a part of researchers have applied a photocatalysis technology to degrade rhodamine B wastewater and have made a certain progress, and the technology is expected to become an effective method for degrading rhodamine B in printing and dyeing wastewater.
The invention comprises the following steps:
in order to solve the problems, the invention adopts the following technical scheme: biOBr/MoS 2 The preparation method of the photocatalyst comprises the following steps:
1) Ammonium molybdate tetrahydrate (N)H 4 ) 6 Mo 7 O 24 ·4H 2 O and thiourea CH 4 N 2 S, adding the solution into deionized water, stirring and carrying out ultrasonic treatment to obtain a solution A;
2) 4ml of sodium polyacrylate (C) 3 H 3 NaO 2 ) n Adding the mixture into the solution A obtained in the step 1), continuously stirring, and reacting to obtain a solution B;
3) Centrifuging, washing, removing impurities, drying and grinding the solution B to obtain a black metallic luster powdery product C;
4) Bismuth Bi nitrate pentahydrate (NO) was added to a 50mL beaker 3 ) 3 ·5H 2 O in ethylene glycol C 2 H 6 O 2 Stirring to obtain a solution D;
5) Adding the product C obtained in the step 3) into deionized water, and then adding cetyltrimethylammonium bromide C 19 H 42 Stirring BrN to obtain a solution E;
6) Dropwise adding the solution D obtained in the step 4) into the solution E obtained in the step 5), and stirring to obtain a solution F;
7) Reacting the solution F obtained in the step 6), naturally cooling, centrifugally collecting, washing, drying, and grinding into powder solid to obtain BiOBr/MoS 2 A photocatalyst.
One of the BiOBr/MoS 2 Photocatalyst, according to mass ratio, (NH) 4 ) 6 Mo 7 O 24 ·4H 2 O:CH 4 N 2 The mass ratio of S is 0.8:3:0.032.
one of the BiOBr/MoS 2 In the step 2), the reaction temperature is 180 ℃ and the reaction time is 24 hours.
One of the BiOBr/MoS 2 Photocatalyst, in step 4), bi (NO 3 ) 3 ·5H 2 O:C 2 H 6 O 2 0.97g:20mL.
One of the BiOBr/MoS 2 Photocatalyst, in step 5), product C: c (C) 19 H 42 BrN is 1:45.5.
one of the aboveBiOBr/MoS seed 2 The photocatalyst, step 6), wherein the reaction is carried out at 150 ℃ for 8 hours.
One of the BiOBr/MoS 2 The application of the photocatalyst in degrading rhodamine B waste liquid.
The application method comprises adding BiOBr/MoS into rhodamine B solution 2 And (3) stirring the photocatalyst, and starting a xenon lamp for irradiation.
The beneficial effects of the invention are as follows:
prepared BiOBr/MoS 2 Has high photocatalytic performance and good repeated use stability, is not inactivated and passivated after repeated use for many times, still keeps good catalytic activity, and has good application prospect in the aspect of printing and dyeing wastewater treatment. Brings good economic benefit for the application of the composite photocatalyst and promotes the practical application of the resource-saving and environment-friendly technology.
Drawings
FIG. 1 is BiOBr/MoS 2 The degradation effect of the photocatalyst on rhodamine B waste liquid with different concentrations is shown in the figure.
Detailed Description
Example 1BiOBr/MoS 2 The preparation of the photocatalyst comprises the following steps:
1. into a 100mL beaker was added 0.8g (NH) 4 ) 6 Mo 7 O 24 ·4H 2 O and 3g CH 4 N 2 S, adding 70ml of deionized water, stirring slowly, and performing ultrasonic treatment for 30min to obtain a solution A;
2. 4ml of (C) at a concentration of 8g/L 3 H 3 NaO) n Adding the mixture into the solution A obtained in the step 1), continuously stirring for 60min, and reacting at 180 ℃ for 24h to obtain a solution B;
3. centrifuging the solution B, alternately washing the sample, removing impurities, drying in an oven at 60 ℃, and grinding to obtain a black metallic luster powdery product C;
4. 0.97. 0.97gBi (NO) was added to a 50mL beaker 3 ) 3 ·5H 2 O in 20mL C 2 H 6 O 2 Stirring for 30min to obtain solution D;
5. step 3) The resulting product C was taken up in 0.016g and added to 50ml of deionized water, followed by 0.728g of C 19 H 42 Stirring BrN for 30min to obtain a solution E;
6. dropwise adding the solution D obtained in the step 4) into the solution E obtained in the step 5), and stirring for 60min to obtain a solution F;
7. reacting the solution F obtained in the step 6) for 8 hours at 150 ℃, naturally cooling, centrifugally collecting, alternately washing, removing impurities in a sample, drying at 60 ℃, and grinding into powder solid to obtain BiOBr/MoS 2 A photocatalyst.
EXAMPLE 2BiOBr/MoS 2 Degradation effect of photocatalyst on rhodamine B waste liquid with different concentrations
1. Preparation of BiOBr/MoS according to step 1 of example 1 2 A photocatalyst.
2. Taking 5 same color comparison tubes, and adding 0.05g BiOBr/MoS into each color comparison tube 2 The photocatalyst is then added with 100ml of rhodamine B solution of 5mg/L, 10mg/L, 15mg/L, 20mg/L and 50mg/L respectively, and the mixture is placed into a photochemical reactor and stirred and adsorbed in a dark room for 30min.
3. After reaching the adsorption and desorption equilibrium, each test tube takes out a certain volume of solution, and the supernatant is taken after centrifugation at 8000rpm for 15min, and the concentration of pollutants is measured and taken as the initial concentration.
4. And (3) starting a light source, adjusting the power of the xenon lamp to 450W, and performing a photoreaction experiment. And then taking 5mL of sample solution every 30min, centrifuging, taking supernatant, measuring the concentration of rhodamine B in the solution at 554nm by using an ultraviolet-visible spectrophotometer, and calculating the degradation rate according to a formula (1):
Figure BDA0004014469900000031
wherein C is 0 Is the initial concentration of the pollutant, C t Is the concentration at each time point during contaminant degradation.
The results are shown in FIG. 1, biOBr/MoS 2 The photocatalyst has excellent photocatalytic degradation capability on rhodamine B wastewater after being irradiated by visible light. For rhodamine with higher concentrationB (50 mg/L) has good degradation effect: visible light irradiation can remove 75% after 120 min. As the initial concentration of contaminants decreases, the time required for photocatalytic degradation is significantly reduced. The rhodamine B wastewater with the concentration of 5mg/L, 10mg/L and 15mg/L can be completely degraded within 30min, 60min and 90 min. For rhodamine B with the concentration of 20mg/L, the degradation rate of the rhodamine B reaches 98 percent after 120 minutes of illumination.

Claims (8)

1. BiOBr/MoS 2 The photocatalyst is characterized in that the preparation method comprises the following steps:
1) Ammonium molybdate tetrahydrate (NH) 4 ) 6 Mo 7 O 24 ·4H 2 O and thiourea CH 4 N 2 S, adding the solution into deionized water, stirring and carrying out ultrasonic treatment to obtain a solution A;
2) 4ml of sodium polyacrylate (C) 3 H 3 NaO 2 ) n Adding the mixture into the solution A obtained in the step 1), continuously stirring, and reacting to obtain a solution B;
3) Centrifuging, washing, removing impurities, drying and grinding the solution B to obtain a black metallic luster powdery product C;
4) Bismuth Bi nitrate pentahydrate (NO) was added to a 50mL beaker 3 ) 3 ·5H 2 O in ethylene glycol C 2 H 6 O 2 Stirring to obtain a solution D;
5) Adding the product C obtained in the step 3) into deionized water, and then adding cetyltrimethylammonium bromide C 19 H 42 Stirring BrN to obtain a solution E;
6) Dropwise adding the solution D obtained in the step 4) into the solution E obtained in the step 5), and stirring to obtain a solution F;
7) Reacting the solution F obtained in the step 6), naturally cooling, centrifugally collecting, washing, drying, and grinding into powder solid to obtain BiOBr/MoS 2 A photocatalyst.
2. A BiOBr/MoS as claimed in claim 1 2 A photocatalyst characterized by comprising (NH) in terms of mass ratio 4 ) 6 Mo 7 O 24 ·4H 2 O:CH 4 N 2 The mass ratio of S is 0.8:3:0.032.
3. a BiOBr/MoS as claimed in claim 1 2 The photocatalyst is characterized in that in the step 2), the reaction temperature is 180 ℃ and the reaction time is 24 hours.
4. A BiOBr/MoS as claimed in claim 1 2 A photocatalyst characterized in that in step 4), bi (NO 3 ) 3 ·5H 2 O:C 2 H 6 O 2 0.97g:20mL.
5. A BiOBr/MoS as claimed in claim 1 2 The photocatalyst is characterized in that in the step 5), the product C: c (C) 19 H 42 BrN is 1:45.5.
6. a BiOBr/MoS as claimed in claim 1 2 Photocatalyst, characterized in that in step 6) the reaction is carried out for 8 hours at 150 ℃.
7. A BiOBr/MoS as claimed in any one of claims 1 to 6 2 The application of the photocatalyst in degrading rhodamine B waste liquid.
8. The use according to claim 7, characterized in that it is carried out by adding BiOBr/MoS to rhodamine B solution 2 And (3) stirring the photocatalyst, and starting a xenon lamp for irradiation.
CN202211665478.7A 2022-12-23 2022-12-23 BiOBr/MoS 2 Preparation method and application of photocatalyst Pending CN116037167A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110002500A (en) * 2019-03-28 2019-07-12 岭南师范学院 A kind of Sodium Polyacrylate assistance prepares the method and application of molybdenum disulfide bouquet
CN112371140A (en) * 2020-11-12 2021-02-19 景德镇陶瓷大学 Coralline MoS2Photocatalyst and MoS2Preparation method of-BiOBr heterojunction composite photocatalytic material

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110002500A (en) * 2019-03-28 2019-07-12 岭南师范学院 A kind of Sodium Polyacrylate assistance prepares the method and application of molybdenum disulfide bouquet
CN112371140A (en) * 2020-11-12 2021-02-19 景德镇陶瓷大学 Coralline MoS2Photocatalyst and MoS2Preparation method of-BiOBr heterojunction composite photocatalytic material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
吴福礼: ""二硫化钼基复合光催化剂的制备与应用研究"", 《中国优秀博硕士学位论文全文数据库(硕士)工程科技Ⅰ辑》, no. 10, pages 54 - 56 *

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