Method for preparing Nano composite material of stannic oxide / titanium dioxide

Abstract

This invention relates to a method for preparing SnO2 / TiO2 nanocomposites. The method comprises: (1) performing sol-gel method to prepare SnO2 / TiO2 composite precursor; (2) milling, and torrefying at a high temperature to obtain nanocomposites with different mol. ratios. The method has such advantages as simple technical principle, simple operation and low requirement for equipment. Compared with pure TiO2 material, the obtained SnO2 / TiO2 nanocomposites have such advantages as improved charge separation effect, higher photocatalytic ability, higher sensitivity and changed impedance.

Description

technical field

[0001] The invention relates to a preparation method of a tin dioxide / titanium dioxide nanocomposite material, belonging to the field of inorganic non-metallic materials. Background technique

[0002] Nanocomposite materials have attracted extensive attention because they can enhance the characteristics of a single substance or have incomparable advantages of a single substance. Titanium dioxide is chemically stable, insoluble, non-toxic, and low in cost, and is a widely used semiconductor nanometer photocatalyst. However, the recombination probability of photogenerated electron-hole pairs in pure titanium dioxide is high, and the photocatalytic efficiency is low. Doping a certain amount of tin dioxide can improve its photocatalytic activity. As a surface resistive gas sensor, tin dioxide is widely used in various toxic and harmful gases, combustible gases, industrial waste gases, For the detection of environmental pollution gases, the sensitivity and selec...

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