Method for preparing photocatalyst for sensitization of TiO2 nanotubes by semiconductor quantum dots

Abstract

The invention discloses a method for preparing a photocatalyst for the sensitization of TiO2 nanotubes by semiconductor quantum dots, which comprises: firstly, obtaining TiO2 nanotube powder by using an acid and alkali hydrothermal synthesis method; secondly, mixing and stirring the nanotube powder and thioglycollic acid to perform a reaction at 50 to 100 DEG C for several hours, adding the reaction solution into solution of nitrate, adjusting the pH value of the mixed solution, stirring the mixed solution, filtering the mixed solution, washing an obtained precipitate, adding the precipitate into solution of Na2S, stirring the solution, filtering the solution and washing the resulting product to obtain the TiO2 nanotubes sensitized by the semiconductor quantum dots; or synthesizing solution of quantum dots, ultrasonically mixing the solution with the nanotube powder, filtering a resulting product and washing the resulting product to obtain the TiO2 nanotubes sensitized by the semiconductor quantum dots. The method of the invention is simple, easy to implement, safe and energy-saving and can be used in dye and environmental protection industries and used for developing solar cells.

Description

technical field [0001] The invention relates to the preparation of inorganic materials, especially a semiconductor quantum dot sensitized TiO 2 The preparation method of the nanotube photocatalyst can be used for industrial wastewater treatment, dye degradation and preparation of sensitized solar cells. Background technique [0002] In recent years, the application research of photocatalytic technology in environmental treatment, disinfection and sterilization has developed extremely rapidly. Oxidation of organic pollutants to CO at room temperature using solar energy, photocatalytic oxidation technology 2 、H 2 Simple molecules of inorganic substances such as O, inorganic pollutants can also be oxidized or reduced to harmless substances, and the reaction conditions are mild and the equipment is simple, which has incomparable advantages over traditional catalytic technology and adsorption technology; among them, TiO 2 Because of its stable chemical properties, non-toxicity...

AI Technical Summary

Problems solved by technology

However, there has always been such a contradiction in semiconductor materials used for photochemical conversion, that is, the band gap with good stability is too wide (such as TiO 2 ,E g =3.2ev), visible light is difficult to excite, and narrow-bandgap semiconductor materials sensitive to visible light (such as CdS, E g =2.5ev) but unstable