Preparation method of core-shell structure visible-light-driven photocatalyst

A core-shell structure and visible light technology, applied in the field of photocatalysis, can solve the problems of harsh preparation conditions, complicated preparation process, and limited catalytic effect, and achieve the effects of improved photocatalytic ability, high mobility, and great application value

Active Publication Date: 2018-11-13
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a method for preparing a visible light catalyst with a core-shell structure. The visible light catalyst with a core-shell structure mainly solves the complex preparation process of the visible light catalyst in the prior art, and the preparation conditions Severe technical problems with limited catalytic effect

Method used

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  • Preparation method of core-shell structure visible-light-driven photocatalyst
  • Preparation method of core-shell structure visible-light-driven photocatalyst
  • Preparation method of core-shell structure visible-light-driven photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0019] 1) According to ZrCl 4 and terephthalic acid (H 2 BDC) with a molar ratio of 1:1, respectively weighed ZrCl 4 and terephthalic 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, stir for 30min and move to In the microwave reactor, the reaction temperature is 120° C., and the reaction time is 0.5 h. Cool to room temperature after the reaction, filter with suction, wash with N,N-dimethylformamide and deionized water three times alternately, dry and grind to obtain the UiO-66 matrix material.

[0020] 2) Disperse UiO-66 in deionized water, according to In(NO 3 ) 3 • 5H 2 In(NO 3 ) 3 • 5H 2 O was added to the aqueous dispersion of UiO-66, and after stirring for 30 min, according to dodecylamine, sulfur, sodium lignosulfonate and In(NO 3 ) 3 • 5H 2 The molar ratio of O is 0.1:1.5:0.1:1 and the above substances are added in sequence, and the pH of the system is adjusted to...

Embodiment 2

[0026] 1) According to ZrCl 4 and terephthalic acid (H 2 The molar ratio of BDC) is 1~1, respectively weigh ZrCl 4 and terephthalic acid, dispersed in N,N-dimethylformamide, then, according to the volume ratio of N,N-dimethylformamide and acetic acid is 10~11:1, add acetic acid, after stirring for 30min Move to a microwave reactor, the reaction temperature is 140°C, and the reaction time is 1h. Cool to room temperature after the reaction, filter with suction, wash with N,N-dimethylformamide and deionized water three times alternately, dry and grind to obtain the UiO-66 matrix material.

[0027] 2) Disperse UiO-66 in deionized water, according to In(NO 3 ) 3 • 5H 2 In(NO 3 ) 3 • 5H 2 O was added to the aqueous dispersion of UiO-66, and after stirring, according to dodecylamine, sulfur, sodium lignosulfonate and In(NO 3 ) 3 • 5H 2 The molar ratio of O is 0.2:2:0.2:1, and the above substances are added in sequence, and the pH of the system is adjusted to 3 with 0.5mol / ...

Embodiment 3

[0034] 1) According to ZrCl 4 and terephthalic acid (H 2 The molar ratio of BDC) is 1:1.2, respectively weigh ZrCl 4 and terephthalic acid, dispersed in N,N-dimethylformamide, then, according to the volume ratio of N,N-dimethylformamide and acetic acid is 12:1, add acetic acid, stir and move to microwave In the reaction kettle, the reaction temperature is 160° C., and the reaction time is 1.5 h. Cool to room temperature after the reaction, filter with suction, wash with N,N-dimethylformamide and deionized water three times alternately, dry and grind to obtain the UiO-66 matrix material.

[0035] 2) Disperse UiO-66 in deionized water, according to In(NO 3 ) 3 • 5H 2 In(NO 3 ) 3 • 5H 2 O was added to the aqueous dispersion of UiO-66, and after stirring, according to dodecylamine, sulfur, sodium lignosulfonate and In(NO 3 ) 3 • 5H 2 The molar ratio of O is 0.3:3:0.3:1, and the above substances are added in sequence, and the pH of the system is adjusted to 3 with 0.5mol...

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Abstract

The invention relates to a preparation method of a core-shell structure visible-light-driven photocatalyst. The preparation method provided by the invention comprises the following steps: firstly, preparing an MOF (Metal-Organic Framework) UiO-66 with a morphology of a regular octahedron; then reducing elemental sulfur to be S2-ion by using the weak reducing effect of lauryl amine through a hydrothermal method, and using sodium lignin sulfonate as a coating agent for UiO-66, so as to enable formed In2S3 nano-particles to be evenly loaded on the surface of the UiO-66 to obtain the core-shell structure visible-light-driven photocatalyst taking UiO-66 as a core and In2S3 as a shell. The visible-light-driven photocatalyst prepared by the invention is excellent in stability, high in adsorptionand catalytic efficiencies, has a relatively good degradating effect on organic dyestuff, and can degrade 97 percent of MO (methyl orange) within 60 min under visible light irradiation, and the visible-light-driven photocatalyst is expected to be in large-scale application in the field of photocatalytic degradation for organic dyestuff, antibiotics and the like.

Description

technical field [0001] The invention belongs to the field of photocatalysis and relates to a photocatalyst, specifically an In 2 S 3 / Preparation method of UiO-66 core-shell structure visible light catalyst. Background technique [0002] With the intensification of industrialization, environmental pollution has become an increasingly serious problem in today's society, among which water pollution is particularly serious. The massive discharge of industrial water and domestic sewage has gradually increased the content of pollutants in water bodies, seriously threatening human health and ecological balance. The organic pollutants are especially harmful because of their high toxicity, high concentration and refractory degradation. Among the many means to solve the problem of water pollution, photocatalytic degradation is considered to be the most promising method because of its high degradation efficiency, no secondary pollutants, energy saving and environmental protection....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26B01J35/00
CPCB01J31/1691B01J31/2239B01J31/26B01J35/004B01J35/0073B01J2531/48
Inventor 张小磊张娜房永征甘传先邹军陈倩刘玉峰
Owner SHANGHAI INST OF TECH
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