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Layered composite photocatalyst using bimetallic nanoparticles as heterojunctions and preparation method thereof

A bimetallic nano, photocatalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, non-metallic elements, etc., can solve problems such as poisoning, soil and water environmental pollution, achieve high activity and improve photocatalytic efficiency , good stability

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

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Problems solved by technology

[0014] Although the above-mentioned photocatalysts 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 them, cadmium and bismuth elements are toxic to the human body, and a large amount of It is easy to cause pollution of soil and water environment

Method used

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  • Layered composite photocatalyst using bimetallic nanoparticles as heterojunctions and preparation method thereof
  • Layered composite photocatalyst using bimetallic nanoparticles as heterojunctions and preparation method thereof
  • Layered composite photocatalyst using bimetallic nanoparticles as heterojunctions and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Weigh 15mg 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 3mL of chloroauric acid aqueous solution containing 2.4mg / mL of Au respectively. Adjust the pH value to 7.5, and after fully mixing, use the reflux stirring device to maintain the condition of 80 ℃ and reduce it with a mixture of hydrogen and argon containing 1% hydrogen for 1 hour, and then statically place it in a constant temperature water bath at 40 ℃. Place and age for 4h to obtain a solution containing Pd-Au bimetallic nanoparticles;

[0035] In the resulting solution containing bimetallic nanoparticles, 500 mg of layered Ti 3 C 2 and 2mL of 0.5wt.% perfluorosulfonic acid resin solution, ultrasonically disperse for 30min, make it fully mixed, and then keep it at 80°C for 24h in vacuum to obtain Pd-Au bimetallic nanoparticles as heterojunction Layered Ti 3 C 2 Composite photocata...

Embodiment 2

[0037] 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;

[0038] In the resulting solution containing bimetallic nanoparticles, 500 mg of layered Ti 3 C 2 and 2mL of 0.5wt.% perfluorosulfonic acid resin solution, ultrasonically dispersed for 30min to make it fully mixed, and then kept at 80°C for 24h in vacuum to obtain Pd-Ag bimetallic nanoparticles as heterojunction Layered Ti 3 C 2 Composite photocatalyst B.

Embodiment 3

[0040] Weigh 20 mg of methyl cellulose and dissolve it in 40 mL of deionized water. After fully stirring and dissolving, add 4 mL of chloroauric acid aqueous solution containing 2.4 mg / mL of Au and 5 mL of silver nitrate aqueous solution containing 2 mg / mL of Ag. Adjust the pH value to 7.5, and after fully mixing, use the reflux stirring device to maintain the condition of 80 ℃ and reduce it with a mixture of hydrogen and argon containing 1% hydrogen for 2 hours, and then statically place it in a constant temperature water bath at 40 ℃. Place and age for 4h to obtain a solution containing Au-Ag bimetallic nanoparticles;

[0041] In the resulting solution containing bimetallic nanoparticles, 500 mg of layered Ti 3 C 2 and 2mL of 0.5wt.% perfluorosulfonic acid resin solution, ultrasonically dispersed for 30min to make it fully mixed, and then kept at 80°C for 24h in vacuum to obtain Au-Ag bimetallic nanoparticles as heterojunction Layered Ti 3 C 2 Composite photocatalyst C. ...

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Abstract

The invention discloses a layered composite photocatalyst using bimetallic nanoparticles as heterojunctions. The composite photocatalyst consists of a photocatalysis active component and bimetallic nanoparticles, wherein the bimetallic nanoparticles are uniformly distributed on the photocatalysis active component through an adhesive; the photocatalysis active component is Ti3C2 with a layered structure or an oxidizing product TiO2-xCx, and the adhesive is 0.1-5wt% Nafion perfluorination resin solution, preferably 0.5wt%; the weight percentage of bimetallic nanoparticles and photocatalysis active component is 0.01 to 10.0%; the weight percentage of adhesive and photocatalysis active component is 0.01 to 5.0%. Compared with the prior art, the composite photocatalyst has the advantages that the visible light is more effectively utilized, and the compounding of photo-induced electrons and cavities is inhibited; when the composite photocatalyst is used for photocatalyzing to decompose water to produce hydrogen, the activity is high, and the stability is good.

Description

technical field [0001] The invention relates to the field, in particular to a layered composite photocatalyst with bimetallic nanoparticles as a heterojunction 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 the use of 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 all over the world are competing to develop products related to hydrogen energy. Ni-MH batteries, 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; or to produce hydrogen through electrolysis of water; due to the consumption of a large a...

Claims

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Application Information

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IPC IPC(8): B01J27/20B01J27/22C01B3/04
CPCC01B3/042B01J27/20B01J27/22C01B2203/0277B01J35/39Y02E60/36
Inventor 张火利曹建亮王燕陈泽华贾建波唐庆杰马名杰秦聪申豆
Owner HENAN POLYTECHNIC UNIV
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