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Stannic oxide/graphene carbon nitride composite photocatalytic material and preparation method thereof

A technology of composite photocatalysis and graphite carbon nitride, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc. Recombination efficiency, photocatalytic performance can not meet the requirements and other problems, to achieve the effect of simple operation, conducive to large-scale preparation, and low cost

Inactive Publication Date: 2017-08-29
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the photocatalytic performance of graphitic carbon nitride monomers is still not up to the mark, which is attributed to its high photogenerated carrier recombination rate.
Exfoliation of graphitic carbon nitride into graphene-like carbon nitride (GL-C 3 N 4 ), which can reduce the recombination efficiency of photogenerated electrons and holes

Method used

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  • Stannic oxide/graphene carbon nitride composite photocatalytic material and preparation method thereof
  • Stannic oxide/graphene carbon nitride composite photocatalytic material and preparation method thereof
  • Stannic oxide/graphene carbon nitride composite photocatalytic material and preparation method thereof

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Embodiment 1

[0019] Embodiment 1: the present invention is a kind of preparation method of visible light response type tin dioxide / graphene-like carbon nitride (15wt%) composite photocatalyst, comprising the following steps:

[0020] (1) 6g of dicyandiamide was placed in a tube furnace, fed with nitrogen, and calcined at 600°C for 2 hours to obtain block graphite carbon nitride;

[0021] (2) Put 0.1426g of stannous chloride in a beaker, add deionized water and ethanol to ultrasonically disperse, after it is completely dissolved, adjust the pH to 11 with ammonia water, continue stirring for 10min, the volume of ammonia water is about 2.3mL, deionized The volumes of water and ethanol are both 20mL;

[0022] (3) Put the mixed solution in (2) into a reaction kettle, react at 120° C. for 6 hours, then cool rapidly, centrifuge the mixed solution and dry it in vacuum to obtain tin dioxide;

[0023] (4) Add 0.1 g of block graphite carbon nitride and 0.5 g of ammonium chloride to deionized water a...

Embodiment 2

[0027] Embodiment 2: the present invention is a kind of preparation method of visible light response type tin dioxide / graphene-like carbon nitride (25wt%) composite photocatalyst, comprising the following steps:

[0028] (1) Put 6g of dicyandiamide in a tube furnace, feed nitrogen, and calcinate at 600°C for 2h to obtain block graphite type C 3 N 4 ;

[0029] (2) Put 0.1426g of stannous chloride in a beaker, add deionized water and ethanol to ultrasonically disperse, after it is completely dissolved, adjust the pH to 11 with ammonia water, continue stirring for 10min, the volume of ammonia water is about 2.3mL, deionized The volumes of water and ethanol are both 20mL;

[0030] (3) Put the mixed solution in (2) into a reaction kettle, react at 120° C. for 6 hours, then cool rapidly, centrifuge the mixed solution and dry it in vacuum to obtain tin dioxide;

[0031] (4) Add 0.1 g of block graphite carbon nitride and 0.5 g of ammonium chloride to deionized water and ethanol sol...

Embodiment 3

[0035] Embodiment 3: the present invention is a kind of preparation method of visible light response type tin dioxide / graphene-like carbon nitride (35wt%) composite photocatalyst, comprising the following steps:

[0036] (1) Put 6g of dicyandiamide in a tube furnace, feed nitrogen, and calcinate at 600°C for 2h to obtain block graphite type C 3 N 4 ;

[0037] (2) Put 0.1426g of stannous chloride in a beaker, add deionized water and ethanol to ultrasonically disperse, after it is completely dissolved, adjust the pH to 11 with ammonia water, continue stirring for 10min, the volume of ammonia water is about 2.3mL, deionized The volumes of water and ethanol are both 20mL;

[0038] (3) Put the mixed solution in (2) into a reaction kettle, react at 120° C. for 6 hours, then cool rapidly, centrifuge the mixed solution and dry it in vacuum to obtain tin dioxide;

[0039] (4) Add 0.1 g of block graphite carbon nitride and 0.5 g of ammonium chloride to deionized water and ethanol solut...

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Abstract

The invention belongs to the field of photocatalysis and particularly relates to a stannic oxide / graphene carbon nitride composite photocatalytic material and a preparation method thereof. A composite photocatalyst is prepared by in-situ composition of stannic oxide (SnO2) and a certain mass of graphene carbon nitride (GL-C3N4) obtained by stripping graphite carbon nitride (g-C3N4) through ammonium chloride (NH4Cl). A photocatalytic performance experiment proves that the composite photocatalyst has relatively high photocatalytic activity in comparison with monomers carbon nitride and stannic oxide, and has good application prospect and economic benefit in the aspects of solar energy conversion and sewage treatment.

Description

technical field [0001] The invention relates to a preparation method of a visible light-responsive photocatalyst. The catalyst is a tin dioxide / graphene-like carbon nitride compound, which can be used as an environmental functional material in the field of photocatalytic environmental treatment. Background technique [0002] With the rapid development of economy and society, energy shortage, the contradiction between environmental deterioration and sustainable economic development has become increasingly prominent, photocatalytic technology has attracted widespread attention of scientists in environmental pollution control due to its green sustainability; but many The large band gap and ultraviolet light response of photocatalytic materials have greatly hindered its development and cannot achieve the purpose of large-scale application. Therefore, it is of great practical significance to develop new photocatalysts with high-efficiency visible light response. [0003] Graphite...

Claims

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Application Information

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IPC IPC(8): B01J27/24
CPCB01J27/24B01J35/39
Inventor 吉海燕范亚敏许晖李华明颜佳费婷徐远国
Owner JIANGSU UNIV
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