Activated carbon fiber based composite photocatalyst preparation method

Abstract

The invention belongs to the technical field of pavement materials, discloses an activated carbon fiber based composite photocatalyst preparation method and solves the problem that conventional TiO2 only absorbs ultraviolet light and is high in surface energy, prone to agglomeration and difficult in gathering of pollutants on the TiO2 surface. The method includes: pretreating activated carbon fibers, adding methyl alcohol into a reactor, sequentially adding tetrabutyl titanate, glycol ether, lanthanum nitrate solution, glucose solution, lauric acid and activated carbon fibers, well mixing, performing reaction for 24h in the reactor, cooling to the room temperature, and cleaning and drying with absolute ethyl alcohol to obtain an activated carbon fiber based composite photocatalyst; finally, assessing effectiveness of the composite photocatalyst in catalytic degradation of main components in tail gas under simulated sunlight, adjusting the concentration of lanthanum nitrate and glucosesolution to determine optimum lanthanum and carbon doping quantity in TiO2 to prepare the activated carbon fiber based composite photocatalyst. The activated carbon fiber based composite photocatalystprepared according to the method is capable of absorbing visible light, and pollutant gathering promotion and photocatalytic efficiency improvement are realized.

Description

technical field [0001] The invention relates to a preparation method of an activated carbon fiber-based composite photocatalyst, which belongs to the technical field of pavement materials. Background technique [0002] The research on semiconductor photocatalysis originated in the 1970s. In 1972, Fujishima et al. reported that titanium dioxide (TiO2) irradiated in photovoltaic cells 2 ) can undergo continuous water redox reactions to produce hydrogen gas. Since then, semiconductor photocatalysts have been developed rapidly. At present, the widely studied semiconductor photocatalyst materials are metal oxides and chalcogenides, which have the characteristics of low price, mild reaction conditions, no secondary pollution and high chemical stability. In recent years, semiconductor photocatalysts have been widely used in the decomposition of environmental pollutants, which can degrade organic pollutants into CO 2 、H 2 O, etc., to oxidize or reduce inorganic pollutants to har...

AI Technical Summary

Problems solved by technology

[0007] The purpose of this invention is to provide a kind of preparation method of active carbon fiber-based composite photocatalyst, solve conventional TiO 2 It can only absorb ultraviolet light, has high surface energy, is prone to agglomeration, and is difficult for pollutants to be deposited on TiO 2 surface enrichment issues, thereby improving the TiO 2 Photocatalytic efficiency

[0009] In order to solve the problems of low visible light utilization efficiency of titanium dioxide, high surface energy, easy agglomeration, and difficult enrichment of pollutants, the present invention first selects lanthanum and carbon as modified ions and activated carbon fibers as adsorbents according to the photocatalytic principle of titanium dioxide. Utilize the synergistic effect of the two to improve the catalytic degradation effect of photocatalysts under sunlight, and provide a method for preparing composite photocatalysts