Composite titanium-base film photoelectrode and its making process

Abstract

The invention relates to the area of the semiconductor catalysis technique, especially relates to the thin film photoelectric pole responding to visible light in mixed mode as well as the preparing method. The thin film photoelectric pole comprises following layers is sequence: the titanium substrate, the titanium dioxide thin film with the composite adulteration of cobalt and rethenium, and the titanium dioxide thin film. The photoelectric pole is prepared by using the sol-gel method with features of simple technique and easy to adjust the adulterated density. The invented thin film photoelectric pole possesses the characters of the wide spectral response, stable performance. The invention is applicable to the applicable to the areas of solar utilization, photovoltaic conversion, photocatalysis for degrading the organic contaminant.

Description

technical field [0001] The invention relates to the technical field of semiconductor photoelectric catalysis, in particular to a composite thin film photoelectrode with visible light response and a preparation method thereof. Background technique [0002] In recent years, research on the photocatalytic properties of semiconductor materials has made great progress. Among many inorganic photocatalytic materials such as zinc oxide, titanium dioxide, iron oxide, cadmium sulfide, etc., titanium dioxide has been proved to have the advantages of high photocatalytic activity, stable chemical properties, resistance to photochemical corrosion and non-toxicity, etc. Hydrogen production and other fields have great potential application value. But its disadvantage is that the band gap is large, and it can only absorb light with a wavelength of less than 387.5mm, so it can only absorb a small amount of ultraviolet light in the solar spectrum, and this part of sunlight radiated to the gro...

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Problems solved by technology

But its disadvantage is that the band gap is large, and it can only absorb light with a wavelength of less than 387.5mm, so it can only absorb a small amount of ultraviolet light in the solar spectrum, and this part of sunlight radiated to the ground only accounts for the total solar radiation. 5-10% of the amount, so the utilization rate of solar energy is small

Doping titanium dioxide with metal ions such as Co and Ru can expand the spectral response range of semiconductor catalysts to varying degrees, but most of the current research uses a single metal homogeneous doping to prepare photocatalysts, and its photoelectric catalytic and conversion performance is not ideal.

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