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Preparation method of a magnetic visible light catalyst with broad 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 low catalytic activity of photocatalysts, narrow spectral response range, secondary pollution, etc., and achieve Effects of reducing photogenerated electron-hole recombination rate, improving photocatalytic activity, and improving capture efficiency

Active Publication Date: 2018-11-30
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 of a magnetic visible light catalyst with broad spectral response
  • Preparation method of a magnetic visible light catalyst with broad spectral response
  • Preparation method of a magnetic visible light catalyst with broad 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 belongs to the field of preparation of photocatalysts, and is specifically a preparation method of a magnetic visible light catalyst with broad spectrum response. This solves the problems of current pure g‑C3N4 photocatalysts with low catalytic activity, narrow spectral response range and easy introduction of secondary pollution. The steps of the present invention are as follows: (1) Preparation of two-dimensional layered structure g-C3N4 nanosheets: The g-C3N4 reaction precursor is incubated at 500°C for 2 hours, and after grinding, it is incubated at 500~580°C for 2~4 hours to obtain Two-dimensional layered structure g‑C3N4 nanosheets; (2) Preparation of Fe3O4 nanocrystals; (3) Preparation of g‑C3N4 / CQDs@Fe3O4 ternary composite magnetic photocatalyst. The ternary composite magnetic nanophotocatalyst proposed by the present invention can realize the efficient degradation of organic pollutants by the nanocatalyst and its repeated recovery. The up-conversion fluorescence properties of carbon quantum dots can effectively convert long-wavelength light into short-wavelength light to achieve a broad spectral response of the composite catalyst.

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 Patents(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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