Water decomposition photocatalyst, preparation method and applications thereof

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...

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Problems solved by technology

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

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