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

A nanocomposite material and titanium dioxide technology, which is applied in the field of preparation of tin dioxide/titanium dioxide nanocomposite materials, can solve the problems of high composite probability and low photocatalytic efficiency, and achieve the effects of low equipment requirements, high photocatalytic ability and stable performance.

Inactive Publication Date: 2008-07-16
CENT SOUTH UNIV
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Problems solved by technology

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.

Method used

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

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Embodiment Construction

[0012] 1. The tin salt is tin protochloride (SnCl 2 2H 2 O), get 6.63g, be dissolved in the dehydrated alcohol of 40ml, disperse 30min in the ultrasonic disperser. The titanium salt is butyl orthotitanate (Ti(C 4 h 9 O) 4 ), get 10ml, pour in the 100ml beaker, and slowly pour in the ethanol solution of above-mentioned dispersed stannous chloride, put into magnetic stirrer and stir for 30min. Add 4-5ml deionized water dropwise, measure the pH value every 15 minutes, and control the pH value of the mixture to 9.0 with ammonia water. After the mixture was stirred under a magnetic stirrer for 2 hours, it was left to stand and aged at room temperature for 24 hours. Add 2 to 3 times the volume of distilled water to the aged gel, disperse in an ultrasonic disperser for 30 minutes, then filter and wash twice with a vacuum filter, and wash and filter once with ethanol in the same way. The filtered sample was baked at 100° C. for 12 hours to fully dry it to obtain a composite oxid...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/453C04B35/46C04B35/624
Inventor 杨华明胡岳华张科史蓉蓉唐爱东
Owner CENT SOUTH UNIV
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