Cobaltous oxide photocatalytic material with high photoelectrocatalytic activity and preparation method thereof

A cobalt oxide photoelectric and photoelectric catalysis technology, applied in cobalt oxide/cobalt hydroxide, chemical instruments and methods, physical/chemical process catalysts, etc. problem, to achieve the effect of improving the photocatalytic reaction activity, saving production cost and low cost

Active Publication Date: 2021-11-19
香港城市大学深圳研究院
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  • Application Information

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Problems solved by technology

The cobaltous oxide synthesized by these methods will produce a particle diameter that is too large, and the reaction process is easy to agglomerate, and it is easy to deposit Mg in seawater. 2+ , Ca 2+ ions and other problems, resulting in a decrease in the stability of the photocatalyst and shortened service life

Method used

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  • Cobaltous oxide photocatalytic material with high photoelectrocatalytic activity and preparation method thereof
  • Cobaltous oxide photocatalytic material with high photoelectrocatalytic activity and preparation method thereof
  • Cobaltous oxide photocatalytic material with high photoelectrocatalytic activity and preparation method thereof

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Embodiment 1

[0029] The present embodiment provides a method for preparing cobaltous oxide photocatalytic material having high photo catalytic activity, comprising the steps of:

[0030] (1) the cobalt oxalate was dissolved in 0.7322g 42.5mL of deionized water to obtain an aqueous solution of cobalt oxalate, 7.5mL was added dropwise at 80 ℃ water bath concentration of 5mol / L sodium hydroxide aqueous solution, to maintain the water bath at 80 deg.] C for 10 minutes to precursor body;

[0031] (2) the precursor into a microwave digestion tank, hydrothermal microwave for 20 minutes at 200 ℃, intermediate to obtain a suspension;

[0032] (3) separating the resulting suspension, respectively, with deionized water, washed with ethanol several times, and dried under vacuum to give a solid powder.

[0033] (4) The solid was transferred to a powder under nitrogen, and heated at 900 deg.] C to give the final product cobaltous oxide nanopowder (e.g. figure 2 Shown), the size distribution of the powder ...

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Abstract

The invention relates to a cobaltous oxide photocatalytic material with high photoelectrocatalytic activity and a preparation method thereof. According to the method, a precursor is prepared from a cobalt oxalate aqueous solution and a sodium hydroxide aqueous solution, and the cobaltous oxide is prepared through microwave hydrothermal treatment, drying and high-temperature treatment. The invention provides a novel synthesis method of cobaltous oxide powder with a controllable grain size. The method can significantly improve the photocatalytic reaction activity of the material. The cobaltous oxide powder produced by the method is expected to be further applied in the field of photocatalysis. The production method is low in cost and simple and convenient in synthesis process, can be applied to mass production, and effectively saves the production cost. The cobaltous oxide powder prepared by the method has excellent photoelectrocatalytic activity and has a relatively large commercialization prospect.

Description

Technical field [0001] The present invention belongs to the field of optoelectronic catalytic decomposition of water, in particular to a CoO powder and a preparation method having a high photoelectric catalytic activity. Background technique [0002] In recent years, a large number of studies have shown that cobalt oxide has excellent electrical properties of the catalytic decomposition of water, may be implemented in the efficient transfer of electrons between the surface of a cobalt-based catalyst and a cobalt atom via a water molecule. Meanwhile, a cobalt-based compounds are also applied to seawater photocatalytic decomposition of hydrogen, such as Co 3 O 4 , Co-Pi and so on. Stage a cobalt-based oxide semiconductor, but has a high mobility of carriers, it is a kind of semiconductor photocatalytic material potential. Since a significant impact between the electron transport properties and desorption properties of photogenerated carriers reactant atomic arrangement will reactan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75C01B3/04C01G51/04
CPCB01J23/75B01J35/004B01J35/0033C01G51/04C01B3/042C01P2004/03C01P2004/52C01P2004/64C01P2004/62C01B2203/0277C01B2203/1052Y02E60/36
Inventor 张瑞勤田浩然于耀光
Owner 香港城市大学深圳研究院
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