Preparation method of high-purity N-doped TiO2 mesoporous nanofiber

Abstract

The invention discloses a preparation method of a high-purity N-doped TiO2 mesoporous nanofiber. The preparation method comprises following steps: 1) a precursor spinning solution is prepared, wherein polyvinylpyrrolidone, butyl titanate, diisopropyl azodicarboxylate, and urea are dissolved in a mixed solvent of absolute ethyl alcohol and glacial acetic acid so as to obtain the uniform precursor spinning solution; 2) precursor nanowire is prepared, wherein the precursor nanowire is obtained by subjecting the precursor spinning solution to spinning; and 3) nanowire is prepared, wherein the obtained precursor nanowire is subjected to high temperature calcinations so as to obtain the high-purity N-doped TiO2 mesoporous nanofiber. The preparation technology of the high-purity N-doped TiO2 mesoporous nanofiber is simple; production is convenient; and product quality stability is high.

Description

technical field [0001] The invention relates to a preparation method of an inorganic semiconductor optoelectronic material, especially high-purity N-doped TiO 2 Preparation method of fully mesoporous nanofibers. [0002] Mesoporous material refers to a material with a porous structure and a pore diameter between 2 and 50 nanometers; at% atomic percent. Background technique [0003] TiO 2 It is an important inorganic semiconductor photoelectric material, which has been widely used in the fields of photocatalysis, sewage treatment and solar cells. However, due to TiO 2 It is a typical wide-bandgap semiconductor (Eg=3.2eV), so that it has photoexcitation activity only under the irradiation of ultraviolet light with a wavelength less than 387nm, and this part of light energy only accounts for 3% to 5% of the solar energy on the ground , the utilization rate of solar energy is very low, which greatly limits the TiO 2 Industrial application and promotion of materials. Studie...

AI Technical Summary

Problems solved by technology

However, from the perspective of practical application, traditional TiO 2 Photocatalysts still have the following problems: 1) The spectral response range is <380nm, there is no visible light response, and the utilization rate of solar energy is very low; 2) Commercial nano-powder photocatalysts are easy to agglomerate in the liquid phase system, and the photocatalytic stability is poor and It is difficult to separate and recycle; 3) The specific surface area is low, the adsorption and desorption ability of photocatalytic participants is poor, and the photocatalytic efficiency is low

However, a lot of research work often can only solve one of the problems, such as the synthesis of N-doped TiO 2 Photocatalysts still have disadvantages such as poor stability and low specific surface area, and the improvement of photocatalytic efficiency has limitations. N-doped TiO 2 The research and development of fully mesoporous nanofibers with high-efficiency visible light photocatalysts still faces severe challenges

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