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Bismuth sulfide based composite visible-light-induced photocatalyst and preparation method thereof

A visible light and catalyst technology, applied in the field of photocatalysis, can solve the problems of reduced catalytic effect, poor chemical stability, and easy to fall off, etc., and achieve the effects of weakening recombination, increasing the degree of bonding, and improving photocatalytic efficiency

Inactive Publication Date: 2020-07-03
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a bismuth sulfide-based composite visible light catalyst and its preparation method, which solves the technical problem of poor chemical stability of the composite visible light catalyst in the prior art, which tends to fall off during the catalytic process, and reduces the catalytic effect.

Method used

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  • Bismuth sulfide based composite visible-light-induced photocatalyst and preparation method thereof
  • Bismuth sulfide based composite visible-light-induced photocatalyst and preparation method thereof
  • Bismuth sulfide based composite visible-light-induced photocatalyst and preparation method thereof

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Embodiment 1

[0022] This embodiment provides a Bi 2 S 3 @UiO-66-NH 2 -The preparation method of the SH-based core-shell structure visible light catalyst, the specific steps are as follows:

[0023] 1) According to ZrCl 4 And the molar ratio of 2-aminoterephthalic acid is 1:1, respectively weigh ZrCl 4 and 2-aminoterephthalic acid, dispersed in N,N-dimethylformamide, then, according to the volume ratio of N,N-dimethylformamide and acetic acid is 10:1, add acetic acid, the reaction temperature The temperature is 120°C, and the reaction time is 24h. After the reaction, cool to room temperature, filter with suction, and alternately wash with N,N-dimethylformamide and deionized water for 1-4 times, dry and grind to obtain UiO-66-NH 2 Matrix material;

[0024] 2) Add UiO-66-NH 2 The matrix material is dispersed in 40ml deionized water, 0.5ml thioglycolic acid is dispersed in 20ml ethanol, and then mixed together and ultrasonicated for 30min;

[0025] 3) According to Bi(NO 3 ) 3 ·5H 2 O...

Embodiment 2

[0028] This embodiment provides a Bi 2 S 3 @UiO-66-NH 2 -The preparation method of the SH-based core-shell structure visible light catalyst, the specific steps are as follows:

[0029] 1) According to ZrCl 4 And the molar ratio of 2-aminoterephthalic acid is 1:1, respectively weigh ZrCl 4 and 2 aminoterephthalic acid, dispersed in N,N-dimethylformamide, then, according to the volume ratio of N,N-dimethylformamide and acetic acid is 10:1, add acetic acid, the reaction temperature is 120°C, the reaction time is 24h. After the reaction, cool to room temperature, filter with suction, and alternately wash with N,N-dimethylformamide and deionized water for 1-4 times, dry and grind to obtain UiO-66-NH 2 Matrix material;

[0030] 2) Add UiO-66-NH 2 The matrix material is dispersed in 40ml of deionized water, 1ml of thioglycolic acid is dispersed in 20ml of ethanol, and then mixed together and ultrasonicated for 30min;

[0031] 3) According to Bi(NO 3 ) 3 ·5H 2 O and UiO-66-N...

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Abstract

The invention discloses a preparation method of a Bi2S3@UiO-66-NH2-SH based visible-light-induced photocatalyst with a core-shell structure and a preparation method thereof. The ratio of Bi: Zr of Bi2S3 and UiO-66-NH2 is 1-4:2. The preparation method comprises the following steps: preparing UiO-NH2 with a regular octahedron morphology by adopting a solvothermal method, and then modifying UiO-NH2 by mercapto-acetic acid to uniformly load bismuth sulfide nano particles on the surface of UiO-NH2, thereby obtaining the composite visible-light-induced photocatalyst taking UiO-NH2 as a core and Bi2S3 as a shell. The preparation method of the composite visible-light-induced photocatalyst is simple; the composite visible-light-induced photocatalyst has high visible-light response and better photocatalytic effect than that of pure bismuth sulfide, methyl orange can be degraded by 95% within 90 min under visible-light irradiation, and the composite visible-light-induced photocatalyst is expectedto be applied to the fields of photocatalytic degradation of organic dyes, antibiotics and the like on a large scale.

Description

technical field [0001] The invention belongs to the field of photocatalysis, and in particular relates to a photocatalyst, in particular to a preparation method of a bismuth sulfide-based composite visible light catalyst. Background technique [0002] With the development of industrialization and urbanization, the emission and treatment of gas pollutants (formaldehyde, aromatics, ozone) and water pollutants (organic dyes, heavy metal ions) have become a serious problem. The development of low-cost, high-efficiency environmental purification solutions is not only the only way for my country's industrial development, but also the only way for the sustainable development of China's economy and even the world economy. The use of cheap and green photocatalytic technology to degrade pollutants at normal temperature and pressure is in line with the current environmental protection concepts of "green chemistry" and "sustainable development", so the development of efficient photocata...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J27/04C02F1/30
CPCB01J31/1691B01J27/04C02F1/30B01J2531/48B01J2531/0238C02F2305/10C02F2101/308B01J35/397B01J35/39
Inventor 房永征王航张娜徐晨柯勤飞
Owner SHANGHAI INST OF TECH
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