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Preparation method for magnetic visible light photocatalyst with broadband spectral response

A photocatalyst and visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of narrow spectral response range, low catalytic activity of photocatalysts, secondary pollution, etc. The effect of improving photocatalytic activity, reducing photogenerated electron-hole recombination rate, and improving capture efficiency

Active Publication Date: 2017-04-26
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0011] The present invention is to solve present pure g-C 3 N 4 Photocatalysts have the technical problems of low catalytic activity, narrow spectral response range, and easy introduction of secondary pollution. A preparation method for a magnetic visible light catalyst with wide spectral response is provided.

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  • Preparation method for magnetic visible light photocatalyst with broadband spectral response
  • Preparation method for magnetic visible light photocatalyst with broadband spectral response
  • Preparation method for magnetic visible light photocatalyst with broadband spectral response

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Embodiment Construction

[0029] A method for preparing a magnetic visible light catalyst with broad spectral response, comprising the following steps: (1) two-dimensional layered structure g-C 3 N 4 Preparation of nanosheets: the g-C 3 N 4 The reaction precursor was incubated at 500°C for 2 hours, and after grinding, it was incubated at 500-580°C for 2-4 hours to obtain a two-dimensional layered structure g-C 3 N 4 Nanosheets;

[0030] (2) Preparation of Fe 3 o 4 Nanocrystalline;

[0031] (3) Preparation of g-C 3 N 4 / CQDs@Fe 3 o 4 Ternary Composite Magnetic Photocatalyst:

[0032] (a) with Fe 3 o 4 The nanocrystal is the core, and the surface is aminated by 3-aminopropyltriethoxysilane;

[0033] (b) Combination of carbon quantum dots (CQDs) with surface aminated Fe 3 o 4 The nanocrystals were ultrasonically mixed at 80°C for 8 hours to form a core-shell Fe 3 o 4 @CQDs complex;

[0034] (c) CQDs@Fe was grown by static growth method 3 o 4 The core-shell structure complex loaded in ...

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Abstract

The invention relates to the field of preparation of photocatalysts and in particular to a preparation method for a magnetic visible light photocatalyst with broadband spectral response, aiming at solving the problems of an existing pure g-C3N4 photocatalyst that the catalytic activity is not high, a spectral response range is relatively narrow and secondary pollution is prone to introduce. The preparation method comprises the following steps: (1) preparing a g-C3N4 nano-sheet with a two-dimensional layered structure: keeping heat of a g-C3N4 reaction precursor for 2h at 500 DEG C; after grinding, keeping the heat for 2h-4h under the condition that the temperature is 500 DEG C-580 DEG C, so as to obtain the g-C3N4 nano-sheet with the two-dimensional layered structure; (2) preparing Fe3O4 nano-crystal; and (3) preparing a g-C3N4 / CQDs@Fe3O4 ternary composite magnetic photocatalyst. The ternary composite magnetic photocatalyst provided by the invention can be used for efficiently degrading organic pollutants and can be repeatedly recycled. By utilizing an up-conversion fluorescence property of carbon quantum dots, long-wavelength light can be effectively converted into short-wavelength light, and the broadband spectral response of the composite catalyst is realized.

Description

technical field [0001] The invention belongs to the field of preparation of photocatalysts, in particular to a preparation method of a magnetic visible light catalyst with wide spectral response. Background technique [0002] The water pollution problems caused by organic pollutants such as dyes and phenolic compounds in industrial wastewater and their impact on the sustainable development of human beings have attracted people's attention. These organic pollutants can directly enter water bodies through industrial production processes such as printing and dyeing, textiles, coking, coal chemical industry, and pharmaceuticals, causing pollution to water bodies, endangering human health, and destroying ecosystems. [1] . Therefore, the treatment of organic pollutants in industrial wastewater is urgent. my country attaches great importance to the prevention and control of industrial wastewater pollution. On April 2, 2015, the State Council officially issued the "Water Ten Meas...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30
CPCC02F1/30B01J27/24C02F2101/38C02F2305/10B01J35/39Y02W10/37
Inventor 石建惠冯淑婷温月丽高珊李育珍
Owner TAIYUAN UNIV OF TECH
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