CN113117728A - ZSM-5/Bi4O5Br2Preparation method of composite photocatalytic material - Google Patents

ZSM-5/Bi4O5Br2Preparation method of composite photocatalytic material Download PDF

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Publication number
CN113117728A
CN113117728A CN202110248033.8A CN202110248033A CN113117728A CN 113117728 A CN113117728 A CN 113117728A CN 202110248033 A CN202110248033 A CN 202110248033A CN 113117728 A CN113117728 A CN 113117728A
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zsm
photocatalytic material
composite photocatalytic
composite
precipitate
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Inventor
孙晓杰
王春莲
王亚搏
张木喜
谭知涵
胡江良
张红霞
李洁
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Guilin University of Technology
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Guilin University of Technology
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    • B01J35/39
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00Catalysts comprising molecular sieves
    • B01J29/04Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/40Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
    • B01J29/48Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively containing arsenic, antimony, bismuth, vanadium, niobium tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • 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
    • 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
    • C02F2101/34Organic compounds containing oxygen
    • C02F2101/345Phenols
    • 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
    • C02F2305/00Use of specific compounds during water treatment
    • C02F2305/10Photocatalysts

Abstract

The invention provides ZSM-5/Bi4O5Br2The preparation method of the composite photocatalytic material comprises the steps of preparing ZSM-5/Bi by using bismuth nitrate pentahydrate, a ZSM-5 zeolite molecular sieve and potassium bromide as raw materials and ethylene glycol as a reaction solvent through a simple and easy-to-operate room-temperature precipitation method4O5Br2A composite photocatalytic material. Using xenon lamp as light source, passing light of low wavelength (lambda) through filter<420nm) filtering off, and reacting on ZSM-5/Bi4O5Br2And carrying out a photocatalytic performance test on the composite photocatalytic material. By degrading rhodamine B and bisphenol A, through the degradation of rhodamine B and bisphenol A in the reaction processCharacterization of ZSM-5/Bi by resolution4O5Br2The photocatalytic performance of the composite photocatalytic material. The material has the advantages of high chemical stability, large specific surface area, unique electronic structure, strong light absorption capacity and the like, so that the material has wide application prospect in the aspect of water pollution treatment.

Description

ZSM-5/Bi4O5Br2Preparation method of composite photocatalytic material
Technical Field
The invention belongs to the field of preparation of photocatalytic materials, and particularly relates to ZSM-5/Bi4O5Br2A preparation method of a composite photocatalytic material.
Background
In sewage treatment, photocatalytic oxidation is a novel advanced oxidation technology, is developed on the basis of photochemical oxidation, has strong oxidation capability and no secondary pollution, can be carried out at normal temperature and normal pressure, and has the characteristics of environmental protection, energy conservation and the like.
Bismuth-based semiconductors are a unique new class of photocatalytic materials that have been developed in recent years. Due to the special structure of Bi atoms, the compound can easily form a layered structure, and a bismuth-based compound with visible light response capability is generated. Wherein Bi is in the bismuth-rich halide material4O5Br2The organic light-emitting diode has attracted attention due to high chemical stability, large specific surface area, unique electronic structure and high light absorption capacity, and researches show that the organic light-emitting diode has excellent performance in the degradation aspect of organic matters.
The zeolite has the characteristics of high specific surface area, high thermal stability, ecological friendliness and the like, and can delocalize excited electrons of a semiconductor, so that electron-hole recombination is inhibited, and photoproduction electron transfer is promoted. At present, ZSM-5 zeolite molecular sieves have been widely used as composite materials for photocatalytic reactions, so Bi is considered to be added4O5Br2The high-efficiency photocatalyst can be prepared by compounding with a ZSM-5 zeolite molecular sieve.
Disclosure of Invention
The invention aims to provide ZSM-5/Bi4O5Br2Preparation method of composite photocatalytic materialFor solving environmental problems.
The method comprises the following specific steps:
(1) dissolving bismuth nitrate pentahydrate in ethylene glycol, adding ZSM-5 under stirring, magnetically stirring, adding potassium bromide, and stirring until the potassium bromide is dissolved;
(2) sequentially and slowly adding ultrapure water and ammonia monohydrate into the solution obtained in the step (1), and magnetically stirring;
(3) filtering the reaction solution obtained in the step (2), collecting precipitate, and washing the precipitate;
(4) drying the precipitate obtained in the step (3), and grinding to obtain ZSM-5/Bi4O5Br2A composite photocatalytic material.
Preferably, the magnetic stirring time of the step (1) is 30 min.
Preferably, the magnetic stirring time of the step (2) is 4 h.
Preferably, the oven drying time is 12 h.
Preferably, the ratio of ZSM-5 zeolite molecular sieve in the charged feed: bi4O5Br2The mass fraction ratio is 0.25: 100. 0.75: 100. 1: 100. 2.5: 100. 5: 100, calculating.
ZSM-5/Bi prepared as described above4O5Br2The composite photocatalytic material can be used in the field of sewage treatment. The material is a composite of a zeolite molecular sieve and a bismuth oxyhalide semiconductor, and the existence of the zeolite molecular sieve effectively inhibits electron-hole recombination and promotes photoproduction electron transfer. The composite photocatalytic material has strong oxidizing ability, no secondary pollution, can be carried out at normal temperature and normal pressure, has the characteristics of environmental protection, energy conservation and the like, and provides a thought for solving the environmental problem.
The method has the advantages that:
(1) ZSM-5/Bi is prepared by a simple room temperature precipitation method4O5Br2The composite photocatalytic material is simple and easy to operate;
(2) prepared ZSM-5/Bi4O5Br2The composite photocatalytic material has the performance of effectively degrading rhodamine B (RhB) and bisphenol A (BPA) under visible light;
(3) prepared ZSM-5/Bi4O5Br2The composite photocatalytic material has better circulation stability, and the problem that the photocatalytic efficiency of the material is greatly reduced after primary photocatalysis is avoided;
(4) the application is simple, and only the ZSM-5/Bi to be prepared needs to be used4O5Br2The composite photocatalytic material powder is put into RhB or BPA with a certain concentration, and degradation of RhB or BPA can be carried out under visible light.
Drawings
FIG. 1: ZSM-5/Bi4O5Br2C/C of composite photocatalytic material for degrading RhB0Graph (a) and kinetic fit graph (b);
FIG. 2: ZSM-5/Bi4O5Br2C/C of composite photocatalytic material for degrading BPA0Graph (a) and kinetic fit graph (b);
FIG. 3: ZSM-5/Bi4O5Br2SEM picture of the composite photocatalytic material;
FIG. 4: ZSM-5/Bi4O5Br2XRD spectrogram of the composite photocatalytic material;
FIG. 5: ZSM-5/Bi4O5Br2A nitrogen adsorption isotherm (a) and a pore size distribution diagram (b) of the composite photocatalytic material;
FIG. 6: ZSM-5/Bi4O5Br2XPS full spectrum of the composite photocatalytic material;
FIG. 7: ZSM-5/Bi4O5Br2An ultraviolet-visible diffuse reflection spectrogram (a) and a forbidden band width chart (b) of the composite photocatalytic material;
FIG. 8: ZSM-5/Bi4O5Br2PL profile of the composite photocatalytic material;
FIG. 9: ZSM-5/Bi4O5Br2A photocurrent response graph of the composite photocatalytic material;
FIG. 10: ZSM-5/Bi4O5Br2EIS diagram of composite photocatalytic material.
Detailed Description
The present invention is further described in detail with reference to the following specific examples 1-5, which are intended to be illustrative, but not limiting, of the invention.
Example 1:
ZSM-5/Bi was prepared according to the following procedure4O5Br2The composite photocatalytic material is as follows:
(1) 2.425g of Bi (NO)3)3·5H2Dissolving O in 20mL of ethylene glycol, adding 0.0061g of ZSM-5 under stirring, magnetically stirring for 30min, adding 0.595g of KBr, and magnetically stirring until the O is dissolved;
(2) to the solution obtained in step (1), 8mL of ultrapure water and 2mL of NH were slowly added in this order3·H2O, magnetically stirring for 4 hours;
(3) centrifuging the reaction solution obtained in the step (2) at 4000r/min, collecting precipitates, and sequentially centrifuging and cleaning the precipitates for 3 times by using ultrapure water and absolute ethyl alcohol in turn;
(4) drying the precipitate obtained in the step (3) in a 60 ℃ oven for 12h, and grinding to obtain ZSM-5/Bi4O5Br2A composite photocatalytic material, designated 0.25 ZSM/BOB.
Example 2:
(1) 2.425g of Bi (NO)3)3·5H2Dissolving O in 20mL of ethylene glycol, adding 0.0182g of ZSM-5 under stirring, magnetically stirring for 30min, adding 0.595g of KBr, and magnetically stirring until the O is dissolved;
(2) to the solution obtained in step (1), 8mL of ultrapure water and 2mL of NH were slowly added in this order3·H2O, magnetically stirring for 4 hours;
(3) centrifuging the reaction solution obtained in the step (2) at 4000r/min, collecting precipitates, and sequentially centrifuging and cleaning the precipitates for 3 times by using ultrapure water and absolute ethyl alcohol in turn;
(4) drying the precipitate obtained in the step (3) in a 60 ℃ oven for 12h, and grinding to obtain ZSM-5/Bi4O5Br2A composite photocatalytic material, designated 0.75 ZSM/BOB.
Example 3:
(1) 2.425g of Bi (NO)3)3·5H2Dissolving O in 20mL of ethylene glycol, adding 0.0243g of ZSM-5 under stirring, magnetically stirring for 30min,adding 0.595g of KBr, and magnetically stirring until the mixture is dissolved;
(2) to the solution obtained in step (1), 8mL of ultrapure water and 2mL of NH were slowly added in this order3·H2O, magnetically stirring for 4 hours;
(3) centrifuging the reaction solution obtained in the step (2) at 4000r/min, collecting precipitates, and sequentially centrifuging and cleaning the precipitates for 3 times by using ultrapure water and absolute ethyl alcohol in turn;
(4) drying the precipitate obtained in the step (3) in a 60 ℃ oven for 12h, and grinding to obtain ZSM-5/Bi4O5Br2The composite photocatalytic material is marked as 1 ZSM/BOB.
Example 4:
(1) 2.425g of Bi (NO)3)3·5H2Dissolving O in 20mL of ethylene glycol, adding 0.0606g of ZSM-5 under stirring, stirring for 30min, adding 0.595g of KBr, and magnetically stirring until the mixture is dissolved;
(2) to the solution obtained in step (1), 8mL of ultrapure water and 2mL of NH were slowly added in this order3·H2O, magnetically stirring for 4 hours;
(3) centrifuging the reaction solution obtained in the step (2) at 4000r/min, collecting precipitates, and sequentially centrifuging and cleaning the precipitates for 3 times by using ultrapure water and absolute ethyl alcohol in turn;
(4) drying the precipitate obtained in the step (3) in a 60 ℃ oven for 12h, and grinding to obtain ZSM-5/Bi4O5Br2The composite photocatalytic material is marked as 2.5 ZSM/BOB.
Example 5:
(1) 2.425g of Bi (NO)3)3·5H2Dissolving O in 20mL of ethylene glycol, adding 0.1213g of ZSM-5 under stirring, magnetically stirring for 30min, adding 0.595g of KBr, and magnetically stirring until the O is dissolved;
(2) to the solution obtained in step (1), 8mL of ultrapure water and 2mL of NH were slowly added in this order3·H2O, magnetically stirring for 4 hours;
(3) centrifuging the reaction solution obtained in the step (2) at 4000r/min, collecting precipitates, and sequentially centrifuging and cleaning the precipitates for 3 times by using ultrapure water and absolute ethyl alcohol in turn;
(4) drying the precipitate obtained in the step (3) in a 60 ℃ oven for 12 hours, and grinding to obtain the productZSM-5/Bi4O5Br2The composite photocatalytic material is marked as 5 ZSM/BOB.
Under the irradiation of a xenon lamp, light below 420nm is filtered by using a filter plate, and the photocatalytic performance of the material is characterized by using the degradation efficiency of RhB and BPA.
Doping of ZSM-5 increases Bi4O5Br2The specific surface area of the photocatalytic material is beneficial to the adsorption of pollutants, thereby improving the photocatalytic activity. The zeolite doping can delocalize excited electrons of a semiconductor, so that electron-hole recombination is inhibited, photoproduction electron transfer is promoted, and the zeolite has excellent performance in the degradation aspect of organic matters. Due to ZSM-5/Bi4O5Br2The composite photocatalytic material shows better photocatalytic activity in a visible light area, so that organic pollutants can be efficiently degraded.

Claims (7)

1. ZSM-5/Bi4O5Br2The preparation method of the composite photocatalytic material is characterized by comprising the following specific steps:
1) dissolving bismuth nitrate pentahydrate in ethylene glycol, adding ZSM-5 under stirring, and adding potassium bromide under magnetic stirring until the potassium bromide is dissolved;
(2) sequentially and slowly adding ultrapure water and ammonia monohydrate into the solution obtained in the step (1), and magnetically stirring;
(3) filtering the reaction solution obtained in the step (2), collecting precipitate, and washing the precipitate;
(4) drying the precipitate obtained in the step (3), and grinding to obtain ZSM-5/Bi4O5Br2A composite photocatalytic material.
2. The method of claim 1, wherein: the magnetic stirring time in the step (1) is 30 min.
3. The method of claim 1, wherein: and (3) the magnetic stirring time in the step (2) is 4 h.
4. The method of claim 1, wherein: the drying time was 12 h.
5. The method of claim 1, wherein: the ZSM-5 zeolite molecular sieve in the added raw materials is as follows: bi4O5Br2The mass fraction ratio is 0.25: 100. 0.75: 100. 1: 100. 2.5: 100. 5: 100, calculating.
6. ZSM-5/Bi obtained by the process according to claim 14O5Br2A composite photocatalytic material.
7. ZSM-5/Bi obtained by the process according to claim 14O5Br2The composite photocatalytic material is applied to the field of sewage treatment.
CN202110248033.8A 2021-03-07 2021-03-07 ZSM-5/Bi4O5Br2Preparation method of composite photocatalytic material Pending CN113117728A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101653732A (en) * 2009-09-29 2010-02-24 福州大学 Molecular sieve loaded BiOX photocatalyst, preparation method and application thereof
CN104525226A (en) * 2014-12-25 2015-04-22 太原理工大学 Synthesis method and application method of photocatalyst Bi4O5Br2
CN105833895A (en) * 2016-05-05 2016-08-10 陈建峰 Preparation method of modified BiOBr visible light catalyst
CN106111181A (en) * 2016-06-22 2016-11-16 佛山市高明绿化纳新材料有限公司 Porous graphene zeolite BiOX catalysis material and preparation and application

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101653732A (en) * 2009-09-29 2010-02-24 福州大学 Molecular sieve loaded BiOX photocatalyst, preparation method and application thereof
CN104525226A (en) * 2014-12-25 2015-04-22 太原理工大学 Synthesis method and application method of photocatalyst Bi4O5Br2
CN105833895A (en) * 2016-05-05 2016-08-10 陈建峰 Preparation method of modified BiOBr visible light catalyst
CN106111181A (en) * 2016-06-22 2016-11-16 佛山市高明绿化纳新材料有限公司 Porous graphene zeolite BiOX catalysis material and preparation and application

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
QIZHAO WANG ET AL.: "Immobilized Heteropolyacids with zeolite (MCM-41) to enhance photocatalytic performance of BiOBr", 《MATERIALS LETTERS》 *
伍艳辉等: "TiO2/ZSM-5复合光催化剂降解多环芳烃(PAHs)废水", 《环境科学与技术》 *
李洁: "改性Bi4O5Br2光催化剂的制备及其可见光下降解回灌渗滤液的研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 *

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