Preparation method of nitrogen-doped titanium dioxide photochemical catalyst loaded with foam metal carrier

Abstract

The invention provides a preparation method of a nitrogen-doped titanium dioxide photochemical catalyst loaded with a foam metal carrier. In the preparation method provided by the invention, a vacuum arc ion plating process is used and a prepared nitrogen-doped titanium dioxide film of a photochemical catalyst can be uniformly distributed on the surface of a porous metal, so that the contact areafor a catalytic reaction of the photochemical catalyst is increased and the photocatalytic activity of the photochemical catalyst is higher.

Description

technical field [0001] The invention relates to a preparation method of a nitrogen-doped titanium dioxide photocatalyst, in particular to a preparation method of a nitrogen-doped titanium dioxide photocatalyst loaded on a foam metal carrier. Background technique [0002] Titanium dioxide has been paid more and more attention by scientists for its excellent photocatalytic performance, but its application in real life is still greatly limited due to its own defects. [0003] First: Since titanium dioxide is a wide-bandgap semiconductor (Eg=3.2eV), according to the formula λg=1240 / Eg(nm), it can only respond to short-wavelength ultraviolet rays (input <387nm, accounting for about 5% of solar energy), while the solar spectrum Most of the visible light part (energy accounts for about 45%) in the solar system cannot be effectively utilized, and sunlight cannot be effectively utilized. [0004] Secondly: Although titanium dioxide photocatalyst has good photocatalytic activity, ...

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Problems solved by technology

[0002] Titanium dioxide has been paid more and more attention by scientists for its excellent photocatalytic properties, but its application in real life is still greatly limited due to its own defects.

[0008] Calcination method under ammonia and nitrogen atmosphere, this method is directly heated in nitrogen-containing atmosphere, on the one hand, it will lead to an increase in the grain size of titanium dioxide, on the other hand, it is difficult for nitrogen to be incorporated into titanium dioxide;

[0009] Hydrothermal synthesis method, it is difficult to accurately control the composition of reactants, reaction temperature, reaction time and other parameters that have an important impact on the microscopic morphology, doping amount and doping effect of titanium dioxide;

[0010] Sol-gel method, the effect of nitrogen doping in sol-gel method is affected by many factors such as raw material ratio, reaction conditions, drying conditions, etc. The process is unstable and difficult to control precisely

[0011] The inventors used the multi-arc ion plating method to plate nitrogen-doped TiO on the glass substrate carrier. 2 Thin film overcomes the shortcomings in the above-mentioned process methods, but limited by the glass substrate carrier, the catalytic reaction contact area is small, and the photocatalytic activity needs to be improved

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