WO3/TiO2 hollow composite nanotube and preparation method

Abstract

The invention discloses a WO3/TiO2 hollow composite nanotube and a preparation method. TiO2 and WO3 require different spectra in light-catalyzed reaction, and are combined organically to form an effective WO3/TiO2 heterostructure, so that a solar spectrum can be used better. In addition, WO3 nanoparticles organically grow on the internal surface and the external surface of a TiO2 nanotube, so that a specific surface area of the nanotube is increased greatly, and a light-catalyzed reaction speed is increased greatly. The composite nanotube comprises the hollow TiO2 nanotube with a porous structure, and WO3 nanoparticle layers distributed on an external wall and an internal wall of the TiO2 nanotube. The WO3/TiO2 nanotube has excellently-matched crystal lattices, and can accelerate charge separation of photoinduced electrons and holes. TiO2 generates the photoinduced electrons and the holes under irradiation, and performs oxidation-reduction reaction with a pollutant on the surface. The photoinduced electrons and the holes of a WO3/TiO2 composite thin film are obviously better than those of a TiO2 thin film under the irradiation; the oxidation-reduction reaction is accelerated; and the catalytic performance of the thin film is improved.

Description

technical field [0001] The invention relates to the field of photocatalytic materials, in particular to a tungsten trioxide / titanium dioxide hollow nanotube and a preparation method. Background technique [0002] Energy and environmental issues have always been a concern of people. With the development of science and technology, the requirements for energy are getting higher and higher, and there are more requirements for the efficiency of production capacity. In recent years, nano-photocatalytic technology has been developing continuously. Among them, titanium dioxide catalyst has attracted extensive attention of researchers because of its advantages such as strong oxidation ability, high photocatalytic efficiency and good stability. [0003] Layered nanomaterials, especially those heterostructured semiconductor nanostructures, have received great attention from researchers in recent years, because this material is an environmentally friendly potential material with high sp...

AI Technical Summary

Problems solved by technology

However, in these works, the heterostructured semiconducting nanomaterials were only deposited on the outer walls of the nanotubes, thus limiting the practical applications of the materials.

However, if heterostructured semiconducting nanomaterials can be deposited on the inner and ...

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