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Preparation method for synthesizing nano SnO2/g-C3N4 composite visible-light-driven photocatalyst by ultrasonic assisted deposition method

An assisted deposition, g-c3n4 technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of nanoparticle agglomeration, long reaction time, high reaction temperature, and achieve high preparation efficiency. , the effect of fast reaction speed and simple preparation method

Inactive Publication Date: 2014-07-16
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem of this preparation method is that it needs to go through several times of reaction or drying process, and the reaction temp

Method used

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  • Preparation method for synthesizing nano SnO2/g-C3N4 composite visible-light-driven photocatalyst by ultrasonic assisted deposition method
  • Preparation method for synthesizing nano SnO2/g-C3N4 composite visible-light-driven photocatalyst by ultrasonic assisted deposition method
  • Preparation method for synthesizing nano SnO2/g-C3N4 composite visible-light-driven photocatalyst by ultrasonic assisted deposition method

Examples

Experimental program
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Effect test

Example Embodiment

[0024] Example 1

[0025] Take 2.10g SnCl 4 ·5H 2 O was dissolved in 10 mL of methanol, dispersed by ultrasonic for 20 min, and made into SnCl 4 Methanol solution with a concentration of 0.6 mol / L, add dilute ammonia water to adjust the pH to 2.5 under stirring conditions, then slowly add 50 mL of distilled water, continue to stir for 15 min to make the reaction solution evenly mixed, put it in a microwave oven, and put it into a microwave oven. The reaction was heated for 10 min. After the reaction was completed, it was cooled to room temperature and filtered with suction. The filter cake is dried under microwave, and the drying conditions are microwave power 300W and 500W for 3min each, with an interval of 1min, take out and grind to obtain a white powder, which is nano-SnO 2 . Take 15g of melamine in a crucible and put it into a muffle furnace, carry out the polycondensation reaction under semi-closed conditions, set the muffle furnace heating program to heat up to 300°...

Example Embodiment

[0029] Example 2

[0030] Take 4.20g SnCl 4 ·5H 2 O was dissolved in 10 mL of methanol, dispersed by ultrasonic for 20 min, and made into SnCl 4 Methanol solution with a concentration of 1.2 mol / L, add dilute ammonia water to adjust the pH to 2.5 under stirring conditions, then slowly add 50 mL of distilled water, continue stirring for 15 min to make the reaction solution evenly mixed, put it in a microwave oven, and put it into a microwave oven for 300W and 500W microwave power. The reaction was heated for 10 min. After the reaction was completed, it was cooled to room temperature and filtered with suction. The filter cake is dried under microwave, and the drying conditions are microwave power 300W and 500W for 3min each, with an interval of 1min, then take out and grind to obtain a white powder, which is nano-SnO 2 . Take 10g of melamine in a crucible and put it into a muffle furnace, and carry out the polycondensation reaction under semi-closed conditions. Continue to ...

Example Embodiment

[0031] Example 3

[0032] Take 6.20g SnCl 4 ·5H 2 O was dissolved in 30 mL of methanol, dispersed by ultrasonic for 20 min, and made into SnCl 4Methanol solution with a concentration of 0.6 mol / L, add dilute ammonia water to adjust the pH to 2.5 under stirring conditions, then slowly add 100 mL of distilled water, continue stirring for 15 min to make the reaction solution evenly mixed, put it in a microwave oven, and put it into a microwave oven for 300W and 500W microwave power. The reaction was heated for 10 min. After the reaction was completed, it was cooled to room temperature and filtered with suction. The filter cake is dried under microwave, and the drying conditions are microwave power 300W and 500W for 3min each, with an interval of 1min, take out and grind to obtain a white powder, which is nano-SnO 2 . Take 20g of melamine in a crucible and put it into a muffle furnace, carry out the polycondensation reaction under semi-closed conditions, set the muffle furnace...

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Abstract

The invention discloses a preparation method for synthesizing a nano SnO2/g-C3N4 composite visible-light-driven photocatalyst by an ultrasonic assisted deposition method, and belongs to the technical field of preparation of a photocatalytic material for purifying the environment. The method comprises the following processes: preparing nano SnO2 by microwave hydrolysis and microwave drying methods; preparing g-C3N4 through polycondensation of melamine, and then dispersing an obtained mixture into a methanol solvent after evenly grinding and mixing nano SnO2 and g-C3N4 according to the ratio; and evenly depositing nano SnO2 on the surface of g-C3N4 by the ultrasonic assisted deposition method, thereby obtaining the nano SnO2/g-C3N4 composite visible-light-driven photocatalyst. The prepared nano SnO2/g-C3N4 composite visible-light-driven photocatalyst disclosed by the invention has an excellent visible light catalytic property and good catalysis stability, and is simple in preparation method, short in reaction time, high in preparation efficiency and applicable to large-scale production, and the raw materials are readily available.

Description

technical field [0001] The invention relates to an ultrasonic-assisted deposition method for synthesizing nano SnO 2 / g -C 3 N 4 The invention discloses a preparation method of a composite visible light catalyst, which belongs to the technical field of preparation of photocatalyst materials for environmental purification. Background technique [0002] Since the discovery in 1972 that nano-titanium dioxide can split water under light, nano-semiconductor photocatalysis technology has attracted widespread attention in the world, and is considered to be the most promising green environmental purification technology. Traditional nano-semiconductor photocatalyst materials such as nano-TiO 2 ZnO and ZnO have been widely studied, but due to their large bandgap (3.2eV), there are problems such as weak response under visible light and low quantum efficiency, which seriously restrict the practical application of photocatalytic technology. Therefore, finding and developing new high-...

Claims

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Application Information

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IPC IPC(8): B01J27/24
Inventor 殷蓉罗青枝王德松安静李雪艳
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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