Water decomposition photocatalyst, preparation method and applications thereof

A technology of catalysts and composite catalysts, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as poor stability and low quantum efficiency of photocatalysts, and achieve good stability.

Inactive Publication Date: 2015-08-26
SUZHOU FANGSHENG OPTOELECTRONICS CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

However, these photocatalysts suffer from low quantum efficiencies and poor stability

Method used

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  • Water decomposition photocatalyst, preparation method and applications thereof
  • Water decomposition photocatalyst, preparation method and applications thereof
  • Water decomposition photocatalyst, preparation method and applications thereof

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Embodiment Construction

[0044] The method of the present invention will be described below through specific examples, but the present invention is not limited thereto. The experimental methods described in the following examples, unless otherwise specified, are conventional methods; the reagents and materials, unless otherwise specified, can be obtained from commercial sources.

[0045] The present invention is pyrolysis urea synthesis C3 N 4 method to prepare CDots-C by compounding carbon nanodots 3 N 4 Composite nano-catalysts realize visible light catalytic water splitting. In this specification, CDots all represent carbon quantum dots.

[0046] Prepare CDots;

[0047] CDots were synthesized by electrochemical etching. Two graphite rods were inserted into ultrapure water as anode and cathode, and a DC voltage of 30 V was applied between the two electrodes, and the reaction was continued for 120 h under constant stirring. After the reaction, the colorless ultrapure water turns dark yellow. ...

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Abstract

The present invention provides a water decomposition photocatalyst and a preparation method thereof, wherein the catalyst is a carbon quantum dot-carbon nitride composite catalyst, the carbon quantum dot concentration in the catalyst is 4.8*10<-3>, and carbon quantum dots are respectively performed, the carbon quantum dot solution is further treated through ammonia water, and the obtained material and carbon nitride are subjected to compounding preparation. According to the present invention, the catalyst can have good stability after being subjected to dry reuse 200 times, and the quantum efficiency of the catalyst does not produce significant degeneration after 50 cycles.

Description

technical field [0001] The invention relates to a photocatalyst capable of efficiently and stably catalytically decomposing water through a two-step, two-electron oxidation process by effectively utilizing visible light, and simultaneously producing hydrogen and oxygen, and a preparation method thereof. Background technique [0002] In today's fossil energy crisis, low-cost production of clean energy is one of the effective ways to achieve sustainable human development. However, the decomposition of water usually needs to be realized under relatively strict experimental conditions, such as electrolysis of water, combined photoelectricity and electricity splitting of water, etc., all of which require a certain amount of electrical energy to be injected into the reaction system. Using solar energy to split water to produce H 2 and O 2 is a promising way to store renewable energy. In the past 40 years, many inorganic and organic systems have been used as photocatalysts to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C01B3/04
CPCY02E60/36
Inventor 康振辉李述汤刘阳耶沙亚胡·里弗西兹
Owner SUZHOU FANGSHENG OPTOELECTRONICS CO LTD
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