A method for preparing bismuth-doped nano-titanium dioxide photocatalyst

Abstract

The invention discloses a method for preparing bismuth-doped nano-titanium dioxide photocatalyst. The preparation steps are: 1) take tetrabutyl titanate and absolute ethanol into a beaker, stir evenly, and prepare A mixed solution; 2) take absolute ethanol , glacial acetic acid and deionized water into the beaker, stir evenly, weigh bismuth nitrate pentahydrate into the beaker, stir evenly; 3) under stirring, transfer the A mixed solution to the beaker and stir to prepare the B mixed solution; 4 ) Transfer the mixed solution of B to the reaction kettle, and place it at 60-70°C for 10 hours to form a sol-gel; 5) Take out the sol-gel and put it in a beaker, take polyethylene balls into the beaker and stir, then transfer to the reaction 6) Place the gel in a muffle furnace and calcinate it at 600°C in an oxygen environment to obtain a nano-titanium dioxide photocatalyst. The preparation method has simple steps, convenient operation, short time consumption, no pollution in the preparation process, and cheap and easy-to-obtain raw materials.

Description

technical field [0001] The invention belongs to the technical field of nano-titanium dioxide catalysts, and in particular relates to a method for preparing bismuth-doped nano-titanium dioxide photocatalysts. Background technique [0002] TiO 2 , the Chinese name is titanium dioxide, which is a cheap and efficient semiconductor material. In recent years, it has attracted widespread attention due to its excellent properties such as good chemical stability, thermal stability, non-toxicity, and superhydrophilicity. It is widely used in materials such as photocatalysts, self-cleaning glass, sunscreen coatings and inks, and can be used in the aerospace industry and lithium batteries. Because it can be used to reduce environmental pollution and improve energy shortages, TiO 2 The application in the field of photocatalysis has been paid more and more attention. But because pure TiO 2 The energy bandgap is wide (3.2 eV), and it can only absorb ultraviolet light with a relatively...

AI Technical Summary

Problems solved by technology

This kind of preparation method, its preparation time is as long as more than 100 hours, and the average pore diameter of the co-doped nano-titanium dioxide obtained at last is 9-10nm, and the final experimental measurement shows that compared with pure titanium dioxide, the co-doped nano-titanium dioxide is more optically The catalytic efficiency does not show a good difference, and the catalytic efficiency of the co-doped nano-titanium dioxide catalyst with a molar ratio of Zr:TiO2=8:100 is not as good as that of pure titanium dioxide.

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