Modified non-metal impure nanometer TIO* photocatalyst and its preparing method

Abstract

The invention relates to nonmetallic doped nanometer TiO2 photocatalyst through being modified and the preparation method thereof. The chemical formula of the photocatalyst of the invention is TiO2-XYX / WO3, TiO2-XYX / ZnO, or TiO2-XYX / Cu2O, the crystal grain size is 10 to 200 nm, crystal grains comprises anatase, or simultaneously comprises two crystal forms of anatase and rutile, the range of ultraviolet-visible absorption spectrum is of 230 to 600 nm, and Y is N, C, or S. The invention has the preparation method that the precursors TiN, TiC, or TiS2 of a non-metallic compound containing Ti are dipped in the solution of a compound of W, Zn, or Cu containing certain concentration, and are dried with the normal pressure or the reduced pressure, the obtained powder is calcined under the aerobic or non-oxidative condition, the calcination temperature is at 200 to 900 DEG C, and the reaction time needs 0.1 to 10 hours.

Description

technical field [0001] The invention belongs to the technical field of chemistry, and relates to a modified non-metal-doped nano-titanium dioxide photocatalyst and a preparation method thereof. The catalyst is mainly used in the technical field of indoor air pollution control. Background technique [0002] Indoor air pollution is 5-10 times higher than outdoor, and people spend 80-90% of their time indoors. To some extent, the impact of air pollution on human health is mainly indoors. According to the survey provided by China Standardization Association: 60% of diseases are caused by indoor air pollution. In the late 1990s, with the domestic housing reform and the improvement of people's living standards, especially the rapid development of the building materials industry and the rise of decoration, the pollution caused by decoration materials has become the main form of indoor pollution. [0003] Under the current living conditions in our country, the curative rate and dea...

AI Technical Summary

Problems solved by technology

But with regard to the non-metallic doping process of most research workers provided at present, all still exist certain defect.

[0007] The published patent number is: CN1454710, and the patent name is: nitrogen-containing titanium dioxide photocatalytic film and its preparation method. It provides a method for preparing a nitrogen-containing titanium dioxide photocatalytic film by magnetron sputtering. Its process Complicated and expensive equipment is also required; the patent publication number is: CN1712128A, and the patent name is: a preparation method of nitrogen-doped anatase nano-titanium dioxide, which discloses a method that needs to provide titanium source, precipitant, nitrogen source and water, and mixed according to a certain ratio, and then undergo a hydrothermal reaction, dry, and dry to obtain a nitrogen-doped nano-TiO 2 method, but the formula of this process is relatively complicated, there are too many influencing factors, and the conditions are not easy to control; the patent publication number is: CN150616A, and the patent name is: the preparation method of nitrogen-doped titanium dioxide powder, which provides a method of gradually dripping ammonia water Add it to the titanium compound, then filter, dry, dry, and burn at high temperature to get a nitrogen-doped nano-TiO 2 method, but the preparation process of this method is complicated, it is difficult to have industrial application prospects, and the activity of the catalyst needs to be further improved

[0008] Non-metallic doping can realize TiO through energy band regulation 2 Visible photocatalysis of photocatalysts, on this basis, the construction of semiconductors with matching energy bands can further reduce the recombination rate of photogenerated carriers, increase the photon quantum yield, and improve its photocatalytic efficiency. After searching, there is no patent publication in this regard

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