Preparation method and application of blue titanium dioxide

Abstract

The invention discloses a preparation method and application of blue titanium dioxide. The blue titanium dioxide is prepared by: adding white titanium dioxide and 10-37% formaldehyde solution into a quartz photocatalytic reactor, dispersing by ultrasound, and exposing to ultraviolet irradiation of a high-voltage mercury lamp or xenon lamp 250-400 W for 8-30 min, wherein the concentration of the white titanium dioxide in the formaldehyde solution is 0.08-80 g / L. The blue titanium dioxide is prepared in a normal pressure and normal temperature atmosphere; the preparation method has the advantages of low cost, good simplicity and feasibility, suitability for large-scale preparation and application and the like; the prepared blue titanium dioxide is applicable to in-situ synthesis of titaniumdioxide-based nano heterojunction materials and is widely applicable to the energy and environment fields, such as photocatalytic manufacture of solar fuels and photocatalytic degradation of pollutants.

Description

technical field [0001] The invention relates to a preparation method and application of blue titanium dioxide. Background technique [0002] Energy crisis and environmental pollution are two major challenges facing human society, and photocatalytic technology provides an ideal way to solve energy and environmental problems. Photocatalytic solar fuels and photocatalytic degradation of pollutants have shown important applications in the fields of energy and the environment prospect. However, the realization of large-scale industrial application still needs to solve the bottleneck problems such as the lack of visible light-responsive catalytic materials and the low photocatalytic efficiency caused by the high recombination rate of photogenerated electrons and holes. [0003] Titanium dioxide is the best commercial application so far, and it is also a photocatalytic material with great development prospects in the future. It has strong photocatalytic redox ability, high stabili...

AI Technical Summary

Problems solved by technology

However, the realization of large-scale industrial applications still needs to solve the bottleneck problems of the lack of visible light-responsive catalytic materials and the low photocatalytic efficiency caused by the high recombination rate of photogenerated electrons and holes.

[0003] Titanium dioxide is the best commercial application so far, and it is also a promising photocatalytic material in the future. It has strong photocatalytic redox ability, high stability, resistance to light and chemical corrosion, low cost, reusable, and harmless to the human body. It is non-toxic and environmentally friendly, but it also has the problems of high recombination rate of photogenerated electrons and holes and low utilization rate of visible light

[0004] However, to obtain such colored titanium dioxide often requires conditions such as high temperature, high pressure and air isolation, which greatly limits its wide preparation and application.

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