Method for preparing high stable, reproducible load type photocatalyst of Nano cadmium sulphide

Abstract

A regeneratable high-stability carried nano-CdS photocatalyst is prepared through providing the hydrosulfuryl modified meso-porous oxide (or carbon) as carrier, in-situ generating CdS in the arteries of said carrier, and coating the polyelectrolyte on its external surface. It has high optical reaction activity and stability, and long service life.

Description

technical field [0001] The invention relates to a preparation method of a highly stable and reproducible loaded nano cadmium sulfide photocatalyst. The nano cadmium sulfide catalyst prepared by the method is protected by a polyelectrolyte, and is a photocatalyst with high stability and reproducible use. Background technique [0002] The use of solar energy has become the focus of worldwide attention in the field of new energy and new catalyst research because of its clean energy, non-exhaustion and simple operation. Among them, the photocatalytic oxidation-reduction reaction has received extensive attention and in-depth research in the past two decades. The principle is to use light energy to excite the electrons on the valence band of the catalyst to transition to the conduction band to form electron-hole pairs, which are released in water and air. The oxygen and electron-hole pairs undergo a series of reactions to generate free radicals with super oxidation-reduction capa...

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Problems solved by technology

However, these methods have also caused damage to the photocatalytic activity of cadmium sulfide without exception (such as Y.Guo et al., J.Phys.Chem.B 2005, 109, 21602), and there are also high synthesis costs and cumbersome operating steps. , making it difficult to mass-produce the disadvantages of

[0005] From the above description of the prior art, it can be seen that the current photocatalysts have the problem of incompatibility of activity and stability under visible light.

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