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Protein modified molybdenum selenide photocatalyst for sewage treatment and preparation method of protein modified molybdenum selenide photocatalyst

A technology for protein modification and sewage treatment, applied in physical/chemical process catalysts, water/sewage treatment, light water/sewage treatment, etc., can solve the problem of low photocatalytic activity and catalytic efficiency, easy recombination of photogenerated electrons and holes, Problems such as photocorrosion occur, so as to prevent photocorrosion of molybdenum selenide, inhibit recombination, and reduce recombination rate

Inactive Publication Date: 2018-09-07
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problems that currently widely used molybdenum selenide photocatalysts have large particle size, small specific surface area, easy recombination of photogenerated electrons and holes, low photocatalytic activity and catalytic efficiency, and easy occurrence of photocorrosion, the present invention proposes a Protein-modified molybdenum selenide photocatalyst and preparation method for sewage treatment, thereby effectively improving the specific surface area and photocatalytic activity of molybdenum selenide, and effectively curbing the occurrence of photocorrosion

Method used

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Effect test

Embodiment 1

[0035] The preparation process is:

[0036] (1) Disperse 5 parts by weight of bovine serum albumin in 95 parts by weight of an aqueous urea solution and stir evenly in a water bath to obtain a completely soluble bovine serum albumin solution; the mass concentration of the aqueous urea solution is 32%; the temperature of the water bath is 88°C, the stirring speed is 400r / min, and the dissolution time is 60min;

[0037](2) Add 24 parts by weight of N-diethylhydroxylamine to 76 parts by weight of the bovine serum albumin solution prepared in step (1), and carry out the reduction reaction under stirring; the temperature of the reduction reaction is 75°C, and the time is 3.5h ;

[0038] (3) Add 20 parts by weight of sodium selenite and 23 parts by weight of ammonium heptamolybdate to 57 parts by weight of the reaction solution in step (2) while stirring, ultrasonically disperse evenly, further heat in a water bath, and generate selenium by hydrothermal reaction Molybdenum chlorid...

Embodiment 2

[0046] The preparation process is:

[0047] (1) Disperse 6 parts by weight of bovine serum albumin in 94 parts by weight of an aqueous urea solution and stir evenly in a water bath to obtain a completely soluble bovine serum albumin solution; the mass concentration of the aqueous urea solution is 35%; the temperature of the water bath is 90°C, the stirring speed is 500r / min, and the dissolution time is 50min;

[0048] (2) Add 18 parts by weight of N-diethylhydroxylamine to 82 parts by weight of the bovine serum albumin solution prepared in step (1), and carry out a reduction reaction under stirring; the temperature of the reduction reaction is 78° C., and the time is 3 hours;

[0049] (3) Add 22 parts by weight of sodium selenite and 26 parts by weight of ammonium heptamolybdate to 52 parts by weight of the reaction solution in step (2) while stirring, ultrasonically disperse evenly, further heat in a water bath, and generate selenium by hydrothermal reaction molybdenum, and ...

Embodiment 3

[0057] The preparation process is:

[0058] (1) Disperse 4 parts by weight of bovine serum albumin in 96 parts by weight of an aqueous urea solution and stir evenly in a water bath to obtain a completely soluble bovine serum albumin solution; the mass concentration of the aqueous urea solution is 28%; the temperature of the water bath is 85°C, the stirring speed is 300r / min, and the dissolution time is 70min;

[0059] (2) Add 30 parts by weight of N-diethylhydroxylamine to 70 parts by weight of the bovine serum albumin solution prepared in step (1), and carry out a reduction reaction under stirring; the temperature of the reduction reaction is 72° C., and the time is 4 hours;

[0060] (3) Add 18 parts by weight of sodium selenite and 20 parts by weight of ammonium heptamolybdate to 62 parts by weight of the reaction solution in step (2) while stirring, ultrasonically disperse evenly, further heat in a water bath, and generate selenium by hydrothermal reaction Molybdenum chlor...

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Abstract

The invention provides a protein modified molybdenum selenide photocatalyst for sewage treatment and a preparation method of the protein modified molybdenum selenide photocatalyst. The preparation method comprises the following steps of adding bovine serum albumin in a urea aqueous solution to obtain a bovine serum albumin solution, adding N-diethyl hydroxylamine for reduction reaction, then adding sodium selenite and ammonium heptamolybdate, performing hydrothermal reaction to produce molybdenum selenide, and performing washing and drying to obtain the protein modified molybdenum selenide photocatalyst for sewage treatment. For the preparation method, by utilizing molybdenum ions in a sulfydryl efficient complex solution contained in the bovine serum albumin, prepared nanometer photocatalyst particles are small in size; and meanwhile, through hole reaction of lone pair electrons on sulfydryl groups in the bovine serum albumin and a molybdenum selenide valence band, compounding of molybdenum selenide photoinduced electrons and holes can be effectively inhibited, molybdenum selenide photocorrosion is prevented, the photocatalytic activity and the photocatalytic degradation efficiency are improved, and the protein modified molybdenum selenide photocatalyst has wide application prospect in the aspect of photocatalytically degrading organic pollutants in water.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to the preparation of photocatalysts, in particular to a protein-modified molybdenum selenide photocatalyst for sewage treatment and a preparation method. Background technique [0002] Since the 1970s, continuous environmental pollution and energy shortages have aroused people's concerns about global crises, especially water resource pollution has seriously threatened human health, which has attracted people's attention. In order to realize the sustainable development of human society, it is an urgent and urgent task to develop a new technology that can be used for environmental governance and clean energy production. Among them, photocatalytic technology has been highly valued because of its broad application prospects in environmental protection, clean energy production and other fields, and has gradually become a promising sewage treatment technology. [0003] The key to photocat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/34B01J35/02C02F1/30C02F1/72C02F101/30B01J35/00
CPCC02F1/30C02F1/725B01J31/34C02F2305/10C02F2101/30B01J35/40B01J35/39
Inventor 陈庆司文彬
Owner CHENDU NEW KELI CHEM SCI CO LTD