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Metal/polycrystal surface Cu2O composite adjustable photocatalyst and preparation method thereof

A polycrystalline surface and light-regulating technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of photocatalytic efficiency discount and achieve low cost , less pollution, and convenient operation

Active Publication Date: 2020-03-06
NANKAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is generally believed that the carrier transport and separation ability of semiconductors is the key factor affecting the photocatalytic performance, but if the carrier accumulation site is inconsistent with the target reactant adsorption site, the photocatalytic efficiency will be greatly reduced (Small 2018,14, 1704531)

Method used

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  • Metal/polycrystal surface Cu2O composite adjustable photocatalyst and preparation method thereof
  • Metal/polycrystal surface Cu2O composite adjustable photocatalyst and preparation method thereof
  • Metal/polycrystal surface Cu2O composite adjustable photocatalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1) Preparation of polycrystalline Cu by chemical precipitation method 2 O particles;

[0047] 1.1) Add 20mmol CuSO 4 ·5H 2 O was added to 50ml of deionized water and heated to 70°C to obtain solution I;

[0048] 1.2) Add 20ml of 0.18g / ml aqueous sodium hydroxide solution dropwise to the copper salt solution obtained in step 1.1), and stir for 5min to obtain suspension II;

[0049] 1.3) Add 0.6 g of glucose to the suspension II obtained in step 1.2), and react for 1 hour to obtain

[0050] The suspension of copper precipitation is taken out and aged for 1 hour, separated, washed, and dried in vacuum at 70°C for 12 hours to obtain polycrystalline Cu 2 O particles. It was confirmed by scanning electron microscope (SEM) observation that the polycrystalline Cu 2 The O particle is a 26-hedron. According to the common knowledge of the prior art, the polycrystalline Cu 2 The crystal faces of O particles are divided into three types: {100}, {110}, and {111} according to d...

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Abstract

The invention discloses a metal / polycrystal surface Cu2O composite adjustable photocatalyst and a preparation method thereof. The photocatalyst is prepared by combining chemical precipitation method and photoreduction method. The preparation method includes the specific steps of: 1) preparing polycrystal surface Cu2O particles by chemical precipitation method, and 2) growing metal on the surfacesof the polycrystal surface Cu2O particles obtained in step 1) by photoreduction method to obtain the metal / polycrystal surface Cu2O composite adjustable photocatalyst.

Description

technical field [0001] The invention relates to a composite photocatalyst with adjustable photocatalytic performance and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of industry and the continuous growth of global population, problems such as energy shortage and environmental pollution have been caused. To ensure the sustainable development of human society, there is an urgent need to develop environmentally friendly renewable technologies that produce green energy and repair environmental problems. Semiconductor-based artificial photocatalysis technology directly uses solar energy to produce green renewable fuels and decompose organic pollutants in wastewater, providing a revolutionary new model for solar energy conversion and utilization. In 1972, Japanese scientists Fujishima and Honda discovered that semiconductor TiO 2 Capable of decomposing water into H through photocatalysis 2 (Nature, 1972, 37, 238), since...

Claims

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Application Information

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IPC IPC(8): B01J23/89C02F1/30
CPCB01J23/8926C02F1/30C02F2305/10C02F2101/308B01J35/23
Inventor 刘晖张瑞程雅慧孙兴军
Owner NANKAI UNIV
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