Preparation method of sulphur and fluorin-doped titanium dioxide nanotube

Abstract

The invention discloses a preparation method of a sulphur and fluorin-doped titanium dioxide nanotube, which comprises the following steps of: preparing 0.5M H2SO4+0.5wt% of HF into electrolyte; adopting a positive electrode oxidation method, taking a titanium plate as a positive electrode, and taking a nickel plate as a negative electrode; growing the titanium dioxide nanotube, on the titanium plate; and calcining in a heating furnace of 673-973K in the air atmosphere and naturally cooling. The preparation technology is simple, has low cost, and is easily controlled. Compared with the normal titanium dioxide film, the sulphur and fluorin-doped titanium dioxide nanotube has larger specific surface area and higher adsorption capacity, can effectively improve the photoelectricity conversion efficiency, and obviously improves the catalytic activity of visible light of TiO2. The titanium dioxide nanotube can be effectively used in fields such as solar energy use, photoelectricity conversion, photochemical catalysis, and organic matter photocatalytic degradation, etc.

Description

technical field [0001] The invention relates to a preparation method of sulfur and fluorine co-doped titanium dioxide nanotubes, and belongs to the technical field of semiconductor photoelectric catalysis. Background technique [0002] TiO 2 It is an n-type semiconductor material with stable chemical properties and light corrosion resistance; it has the advantages of large band gap, high redox potential, large photocatalytic reaction driving force, and high photocatalytic activity; it can make some endothermic chemical reactions TiO irradiated by light 2 Surfaces are realized and accelerated; coupled with TiO 2 Inexpensive, easy to obtain, non-toxic and harmless, low cost, so photocatalytic research is based on TiO 2 most active. However, in the process of large-scale practical and commercial industrial applications, TiO 2 There has been no major breakthrough in photocatalytic technology for a long time because of: (1) TiO 2 The utilization rate of solar energy is low;...

AI Technical Summary

Problems solved by technology

However, in the process of large-scale practical and commercial industrial applications, TiO 2 There has been no major breakthrough in photocatalytic technology for a long time because of: (1) TiO 2 The utilization rate of solar energy is low; (2) the recombination rate of semiconductor carriers is high, so the quantum efficiency is low; (3) TiO 2 The direct use of powder has disadvantages such as easy aggregation of the catalyst, easy poisoning and deactivation, and difficulty in separation and recovery; while the stationary phase system has disadvantages such as relatively harsh immobilization conditions and decreased photocatalytic activity.

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