Two-dimensional nanosheet composite photocatalyst with bimetallic nanoparticles as heterojunction and preparation method thereof

A bimetallic nano, two-dimensional nano technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of human poisoning, soil, water environmental pollution, etc., and achieve good stability , Improve photocatalytic efficiency, high activity effect

Inactive Publication Date: 2017-05-10
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Although the photocatalysts disclosed above are all composite photocatalysts, these photocatalysts are composite photocatalysts prepared on the basis of traditional materials such as cadmium sulfide, bismuth phosphate or bismuth nitrate, among which cadmium and bismuth elements are toxic to the human body. , a large amount of use is likely to cause pollution to the soil and water environment

Method used

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  • Two-dimensional nanosheet composite photocatalyst with bimetallic nanoparticles as heterojunction and preparation method thereof
  • Two-dimensional nanosheet composite photocatalyst with bimetallic nanoparticles as heterojunction and preparation method thereof

Examples

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Effect test

Embodiment 1

[0030] Weigh 10 mg of methyl cellulose and dissolve it in 40 mL of deionized water. After fully stirring and dissolving, add 1 mL of palladium nitrate aqueous solution containing 2 mg / mL of Pd and 4 mL of silver nitrate aqueous solution containing 2 mg / mL of Ag to adjust the pH value to 7.5, after fully mixing evenly, and then using the reflux stirring device to maintain the condition of 80 ° C with a hydrogen-containing 1% mixture of hydrogen and argon for 1 hour, and then let it stand in a constant temperature water bath at 40 ° C Aging for 4h to obtain a solution containing Pd-Ag bimetallic nanoparticles;

[0031] In the resulting solution containing Pd-Ag bimetallic nanoparticles, add 500 mg of two-dimensional g-C 3 N 4 Nanosheets and 2mL of 0.5wt.% perfluorosulfonic acid resin solution were ultrasonically dispersed for 30 minutes to make them fully mixed, and then kept at 80°C for 24 hours in vacuum to obtain Pd-Ag bimetallic nanoparticles as heterogeneous Two-dimension...

Embodiment 2

[0033] Weigh 20mg of methylcellulose and dissolve it in 40mL of deionized water. After fully stirring and dissolving, add 2mL of palladium nitrate aqueous solution containing 2mg / mL of Pd and 4mL of silver nitrate aqueous solution of 2mg / mL of Ag to adjust the pH value to 7.5, after fully mixing evenly, and then using the reflux stirring device to maintain the condition of 80 ° C with a hydrogen-containing 1% mixture of hydrogen and argon for 1 hour, and then let it stand in a constant temperature water bath at 40 ° C Aging for 4h to obtain a solution containing Pd-Ag bimetallic nanoparticles;

[0034] In the resulting solution containing Pd-Ag bimetallic nanoparticles, add 500 mg of two-dimensional g-C 3 N 4 Nanosheets and 2mL of 0.5wt.% perfluorosulfonic acid resin solution were ultrasonically dispersed for 30 minutes to make them fully mixed, and then kept at 80°C for 24 hours in vacuum to obtain Pd-Ag bimetallic nanoparticles as heterogeneous Two-dimensional g-C of the j...

Embodiment 3

[0036] Weigh 20 mg of methyl cellulose and dissolve it in 40 mL of deionized water. After fully stirring and dissolving, add 4 mL of an aqueous solution of palladium nitrate containing 2 mg / mL of Pd and 4 mL of aqueous solution of silver nitrate containing 2 mg / mL of Ag to adjust the pH value to 7.5, after fully mixing evenly, and then using the reflux stirring device to maintain the condition of 80 ° C with a hydrogen-containing 1% mixture of hydrogen and argon for 1 hour, and then let it stand in a constant temperature water bath at 40 ° C Aging for 4h to obtain a solution containing Pd-Ag bimetallic nanoparticles;

[0037] In the resulting solution containing Pd-Ag bimetallic nanoparticles, add 500 mg of two-dimensional g-C 3 N 4 Nanosheets and 2mL of 0.5wt.% perfluorosulfonic acid resin solution were ultrasonically dispersed for 30 minutes to make them fully mixed, and then kept at 80°C for 24 hours in vacuum to obtain Pd-Ag bimetallic nanoparticles as heterogeneous Two-...

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Abstract

The invention discloses a two-dimensional nanosheet composite photocatalyst with bimetallic nanoparticles as heterojunctions. The two-dimensional nanosheet composite photocatalyst is composed of a photocatalytic active component and the bimetallic nanoparticles uniformly distributed on the photocatalytic active component by virtue of a binding agent, wherein the photocatalytic active component is a two-dimensional g-C3N4 nanosheet, the binding agent is 0.1-5wt% Nafion perfluorinated resin solution, and the bimetallic nanoparticles are Pd-Ag bimetallic nanoparticles. Raw materials used by the composite photocatalyst are environment-friendly materials respectively, and the Pd-Ag bimetallic nanoparticle heterojunctions have surface plasma resonance effect and interface schottky effect and can more effectively utilize visible light and inhibit recombination of photo-induced electrons and holes, so that the composite photocatalyst disclosed by the invention has high activity and good stability when being applied to hydrogen production through photocatalytic decomposition of water.

Description

technical field [0001] The invention relates to the field of catalysts for photocatalytic decomposition of water to produce hydrogen, in particular to a two-dimensional nanosheet composite photocatalyst with bimetallic nanoparticles as heterojunctions and a preparation method thereof. Background technique [0002] At present, due to the limited reserves of traditional fossil energy and the environmental problems caused by using them are becoming more and more prominent, people urgently need to find new alternative energy. Hydrogen energy is valued for its high efficiency and cleanness. Scientists from various countries are competing to develop products related to hydrogen energy. Ni-MH batteries and hydrogen fuel cell vehicles and other related products are moving from the laboratory to the society, and the hydrogen energy economy is coming. [0003] The traditional way of hydrogen production is mainly to produce hydrogen through the cracking of coal, oil, and natural gas; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C01B3/04
CPCB01J27/24B01J35/004B01J35/023B01J37/0018C01B3/042C01B2203/0277C01B2203/1064C01B2203/1082Y02E60/36
Inventor 张火利王燕曹建亮唐庆杰贾建波陈泽华马名杰宫雨晓秦聪申豆张润
Owner HENAN POLYTECHNIC UNIV
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