Method for preparing modified titanium oxide sol, powder and film

Abstract

The invention discloses a preparing method of modified titanium oxide sol, powder and film, which comprises the following steps: (1) adding at least one titanium tetrachloride, titanium sulfate or butyl titanate in the alcohol diluent; (2) dripping the composite solution in the step (1) into hydrolytic solvent; (3) dissolving nitrogen-containing compound in the sol evenly; (4) stewing the sol; aging until producing blue white transparent sol; (5) drying the sol into dried powder to obtain titanium oxide powder; (6) filming the sol in the step (4) to form titanium oxide film.

Description

Technical field [0001] The invention relates to a method for preparing a titanium oxide photocatalyst, and more specifically, to a method for preparing a modified titanium oxide sol, powder and film. Background technique [0002] As an ideal semiconductor photocatalyst, titanium oxide has good application prospects in solar energy storage and utilization, photochemical conversion, and environmental treatment of organic pollutants. If titanium oxide photocatalyst powder is added to the ceramic glaze, the resulting product can have antibacterial and self-cleaning effects. [0003] Pure titanium oxide has a large band gap, which requires ultraviolet light to be excited, and the light utilization rate is low. Many researchers introduce various ions (including metal ions such as Fe and La and non-metal ions such as N and C) into the solution through wet chemical processes, and then make the metal or non-metal ions enter the crystal of titanium oxide through subsequent high-temperature...

AI Technical Summary

Problems solved by technology

However, the high-temperature calcination in the above process limits the application of titanium oxide, so that it can only appear in the form of film or powder, and cannot be applied to heat-labile substrates (such as plastics) or areas that are difficult to heat (such as The walls of buildings); in addition, the high-temperature heat treatment process will make the titanium oxide grains grow, the quantum effect will be weakened, and the photocatalytic effect will be reduced

[0004] In another study, a nitrogen-doped titanium oxide film was prepared by CVD and plasma methods in a protective atmosphere of nitrogen and ammonia, but the requirements for equipment are relatively high, and it is difficult for industrial application; the high-temperature calcination in the above-mentioned wet chemical process can also be used process, using nitrogen and ammonia protective atmosphere to achieve nitrogen doping, but it is difficult to control the amount and process of doping