Preparation method of visible light response type TiO2 (titanium dioxide) precursor and prepared TiO2 precursor and catalyst thereof

Abstract

The invention relates to a preparation method of a visible light response type TiO2 (titanium dioxide) precursor and a prepared TiO2 precursor and a catalyst thereof. The preparation method comprises the following steps of (1) adding titanate and organic macromolecules into a reaction container, adding boric acid at the temperature of 50 to 90 DEG C, and reacting at the temperature of 100 to 120 DEG C until a solution is clear and transparent; (2) at the temperature from room temperature to 90 DEG C, adding a nitrogen-containing compound, heating and refluxing; (3) at the temperature from room temperature to 100 DEG C, adding a chelating agent, heating and refluxing; and (4) at the temperature from room temperature to 80 DEG C, dripping a mixed solution of water and alcohol, refluxing after dripping, cooling, relieving pressure, and removing a solvent, so as to obtain the TiO2 precursor. The preparation method has the advantages that the TiO2 precursor can be dissolved into a common solvent, so that the TiO2 precursor can be loaded on substrates of fibers, molecular sieves and the like by simple impregnating; the substrate for loading the precursor is sintered at high temperature in air, and the precursor is converted into a TiO2 photocatalyst to be loaded onto the substrate, so that the problem of recycling of the catalyst is solved, and the problem of no response of common TiO2 catalyst to the visible light is also solved.

Description

technical field [0001] The invention belongs to the field of material science, in particular, relates to a visible light responsive TiO 2 Preparation method of precursor and obtained TiO 2 Precursors and catalysts. Background technique [0002] Since the 20th century, with the continuous development and progress of science and technology, the global industry has achieved unprecedented development. However, while the development of industry promotes economic development and brings convenience to human life, it is also ruthlessly destroying the environment on which human beings live. The air pollution and water pollution brought about by industrial development have an impact on people's lives. has become increasingly apparent. As an advanced oxidation technology, the photocatalytic oxidation technology based on semiconductor catalysts has attracted increasing attention from scholars at home and abroad. Almost all organic compounds can be completely oxidized to CO by photoc...

AI Technical Summary

Problems solved by technology

[0003] TiO 2 The photocatalytic properties of semiconductors have been confirmed by many researches, but there are two key problems to be solved in order to be practical: ① Traditional photocatalytic research is generally carried out in a suspended photocatalytic reaction system, where TiO 2 The powder is easy to agglomerate, and it is difficult to realize the continuous separation, recovery and regeneration of the catalyst; ②TiO 2 Photocatalytic oxidation can only be carried out in the limited wavelength range of ultraviolet light, and the proportion of utilizing sunlight is low, which limits the popularization and application of photocatalytic technology

Although this invention solves the problems of catalyst recycling and visible light response, the visible light catalytic activity needs to be further improved

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