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Nanometer titanium dioxide/selenium dioxide composition and its prepn. method

A nano-titanium dioxide, selenium dioxide technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of low photocurrent efficiency, low utilization rate of sunlight, and poor photocatalytic effect.

Inactive Publication Date: 2006-11-29
ANHUI UNIVERSITY
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Problems solved by technology

However, nano-TiO alone 2 There are some defects in practical application: (1) TiO 2 The band gap is wide (3.2V), and the light absorption is mainly in the ultraviolet region (the energy of this light region is less than 10% of the solar energy on the ground), and the utilization rate of sunlight is low; (2) TiO 2 Photogenerated carriers (h + , e - ) are easily recombined, resulting in poor photocatalytic effect and low photocurrent efficiency

Method used

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  • Nanometer titanium dioxide/selenium dioxide composition and its prepn. method
  • Nanometer titanium dioxide/selenium dioxide composition and its prepn. method
  • Nanometer titanium dioxide/selenium dioxide composition and its prepn. method

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Embodiment Construction

[0030] 1. Dissolve 0.08g of polyvinylpyrrolidone in 6.8ml of absolute ethanol, stir magnetically until completely dissolved, then add 0.028g of SeO 2 , continue to stir until it is completely dissolved, then add 2.3ml tetrabutyl titanate, stir and mix evenly with magnetic force to obtain A solution. Take 3.4ml of absolute ethanol, 5.4ml of deionized water, and adjust the pH value to 2.3 with hydrochloric acid to prepare solution B. Slowly drop 0.6ml of solution B into solution A at a rate of 1 drop / second under magnetic stirring. The process of transforming from a uniform light yellow transparent sol to a gel is completed within a few minutes after dropping. After aging the gel for 16 hours, it was dried in a vacuum oven at 60°C. Then burn in a box-type resistance furnace at 500 °C for 1 h. Cool in the furnace and grind for 20 minutes to get the composite product. The mass ratio of Se / Ti in the raw materials added when preparing the composite is 0.0601, the mass ratio of S...

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Abstract

A nano-class TiO2 / SeO2 composition used for solar cell is a spherical nano-particle and has the anatase-phase crystal structure. Its preparing process includes such steps as reaction between titanate or TiCl4 or titanium sulfate or titanium oxide sulfate and SeO2 or seleninic acid, and water-bath ageing or hydrothermal synthesis or high-temp burning.

Description

1. Technical field [0001] The invention relates to a nano material and a preparation method thereof, in particular to a nano material with photocatalytic activity and a preparation method thereof, specifically a nano titanium dioxide / selenium dioxide composite and a preparation method thereof. 2. Background technology [0002] Nano titanium dioxide (TiO 2 ) In addition to the characteristics of general nanomaterials, it also has good photocatalytic activity, can decompose various environmental pollutants into carbon dioxide and water, and can convert solar energy into electrical energy. Therefore, nano-TiO 2 It has broad application prospects in environmental pollution control, solar cell preparation and other fields. However, nano-TiO alone 2 There are some defects in practical application: (1) TiO 2 The band gap is wide (3.2V), and the light absorption is mainly in the ultraviolet region (the energy of this light region is less than 10% of the solar energy on the groun...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J27/057
Inventor 张胜义陈小景田玉鹏郜洪文金葆康杨家祥吴杰颖
Owner ANHUI UNIVERSITY
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