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Preparation method and application of Bi4O5Br2/thin-layer Ti3C2 composite photocatalyst

A photocatalyst, bi4o5br2 technology, applied in the field of nanomaterials, can solve the problems of uniform distribution, agglomeration and inability to catalyze, and achieve the effects of preventing spontaneous collapse and stacking, shortening the diffusion path, and ensuring stability

Active Publication Date: 2019-12-03
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem that MXenes materials and catalysts are prone to agglomeration and cannot be evenly distributed in the catalyst during the composite process, the present invention provides a simple, economical and environmentally friendly method to prepare a photogenerated electron-hole pair with uniform dispersion and high separation efficiency. Composite photocatalyst, so as to achieve the effect of organic pollutant treatment and photocatalytic hydrolysis hydrogen production

Method used

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  • Preparation method and application of Bi4O5Br2/thin-layer Ti3C2 composite photocatalyst
  • Preparation method and application of Bi4O5Br2/thin-layer Ti3C2 composite photocatalyst
  • Preparation method and application of Bi4O5Br2/thin-layer Ti3C2 composite photocatalyst

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Effect test

Embodiment 1

[0033] Slowly add 1 gLiF into 20 mL of 6 M concentrated HCl and stir evenly, then slowly add 1 gTi 3 AlC 2 , continuously stirred at 35°C for 24 h; centrifuged and washed the etched solid until the pH of the supernatant after centrifugation was ≥ 6, collected the solid in a vacuum drying oven, and dried at 60°C for 24 h , the collected solid is the multilayer Ti 3 C 2 material, denoted as multilayer Ti 3 C 2 -A; take 0.2 g multilayer Ti 3 C 2 -A solid was added to 50 mL H 2 In O, sonicate for 1 h under the protection of argon atmosphere, centrifuge at 3500 r / min for 1 h, and collect the dark supernatant as a thin layer of Ti 3 C 2 solution, denoted as thin layer Ti 3 C 2 -A.

[0034] 0.01 molBi(NO 3 ) 3 ·5H 2 O was added to 40 mL of ethylene glycol and stirred at room temperature for 1.5 h. After clarification, 0.01 mol KBr was added to continue stirring for 0.5 h to form a clear solution A; 4 mL of thin-layer Ti 3 C 2 The solution was diluted to 16 mL with 4 m...

Embodiment 2

[0038] Slowly add 1.5 gLiF into 20 mL of 9 M concentrated HCl and stir evenly, then slowly add 1.5 gTi 3 AlC 2 , continuously stirred at 60°C for 36 h; centrifuged and washed the etched solid until the pH of the supernatant after centrifugation was ≥ 6, collected the solid in a vacuum drying oven, and dried at 60°C for 24 h , the collected solid is the multilayer Ti 3 C 2material, denoted as multilayer Ti 3 C 2 -B; take 0.8 g multilayer Ti 3 C 2 -B solid was added to 100 mL H 2 In O, sonicate for 1 h under the protection of argon atmosphere, centrifuge at 3500 r / min for 1 h, and collect the dark supernatant, which is the thin layer of Ti 3 C 2 solution, denoted as thin layer Ti 3 C 2 -B.

[0039] 0.05 molBi(NO 3 ) 3 ·5H 2 O was added to 40 mL of ethylene glycol and stirred at room temperature for 1.5 h. After clarification, 0.05 mol KBr was added to continue stirring for 0.5 h to form a clear solution A; 3 C 2 The solution was diluted to 16 mL with 4 mL NH 3 •...

Embodiment 3

[0042] Slowly add 2 gLiF into 20 mL of 12 M concentrated HCl and stir evenly, then slowly add 2 gTi 3 AlC 2 , continuously stirred at 60°C for 36 h; centrifuged and washed the etched solid until the pH of the supernatant after centrifugation was ≥ 6, collected the solid in a vacuum drying oven, and dried at 60°C for 24 h , the collected solid is the multilayer Ti 3 C 2 material, denoted as multilayer Ti 3 C 2 -C; take 1.6 g multilayer Ti 3 C 2 -C solid was added to 100 mL H 2 In O, sonicate for 2 h under the protection of argon atmosphere, centrifuge at 3500 r / min for 1 h, and collect the dark supernatant as a thin layer of Ti 3 C 2 solution, denoted as thin layer Ti 3 C 2 -C.

[0043] 0.01 molBi(NO 3 ) 3 ·5H 2 O was added to 40 mL of ethylene glycol and stirred at room temperature for 1.5 h. After clarification, 0.01 mol KBr was added to continue stirring for 0.5 h to form a clear solution A; 12 mL of thin-layer Ti 3 C 2 The solution was diluted to 16 mL with ...

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Abstract

The invention discloses a preparation method and application of a Bi4O5Br2 / thin-layer Ti3C2 composite photocatalyst, belongs to the technical field of nano materials, and aims to solve the problems that an MXenes material is easy to agglomerate when being compounded with a catalyst and thus cannot be uniformly distributed in the catalyst. The preparation method comprises the following steps: by taking titanium aluminum carbide as a raw material, and concentrated hydrochloric acid and lithium fluoride as etching agents, performing etching and ultrasonic treatment so as to prepare a uniformly dispersed thin-layer Ti3C2 solution; by taking bismuth nitrate pentahydrate and potassium bromide as raw materials, ethylene glycol as a solvent, and a mixed solution of the thin-layer Ti3C2 solution and ammonium hydroxide as a reaction liquid, performing an alcoholysis method, so as to obtain the Bi4O5Br2 / thin-layer Ti3C2 composite photocatalyst at a normal temperature. The degradation activity ofthe catalyst upon organic matters and the photocatalytic hydrolysis hydrogen production efficiency can be remarkably improved. In addition, the method can be implemented at a normal temperature, is simple and feasible and has great significances for environment treatment and green energy utilization.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, in particular to a Bi 4 o 5 Br 2 / thin layer Ti 3 C 2 The preparation method and application of the composite photocatalyst can be used for organic pollutant treatment and hydrogen production by photocatalytic hydrolysis. Background technique [0002] Today, with the rapid progress of society and the rapid development of science and technology, the threats of environmental pollution and energy depletion are increasingly revealed. Semiconductor photocatalytic technology is regarded as a kind of Environmental governance and energy alternative technologies with great application prospects. At present, a large number of photocatalysts are used in the degradation of water pollutants such as dyes and drugs, as well as the photolysis of water to produce hydrogen, CO 2 Conversion of energy such as reduction and nitrogen fixation. Among them, Bi x o y Br z The series of photocatalysts show...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22B01J37/06B01J37/34B01J37/02C01B3/04C02F1/30C02F101/30C02F101/34C02F101/38
CPCB01J27/22B01J37/06B01J37/343B01J37/0215C01B3/042C02F1/30C02F2305/10C02F2101/30C01B2203/1041C01B2203/0277C02F2101/34C02F2101/38C02F2101/40C02F2101/345B01J35/39Y02E60/36
Inventor 李瑞席庆樊彩梅张辉李亚茹刘建新张小超王雅文王韵芳
Owner TAIYUAN UNIV OF TECH
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