Synthesizing method of water-based nano conductive sol and transparent conductive thin film made of water-based nano conductive sol

Abstract

The invention relates to a synthesizing method of tin dioxide / titanium dioxide solid solution nano sol composite and a film forming technique for preparing transparent conductive thin films on surfaces of different substrates on the basis of the sol. The synthesizing method includes the steps of firstly, precipitating tin-titanium hydroxide; secondly, dispersing precipitate with hydrogen peroxide; and thirdly, synthesizing final product. The synthesizing method is few in steps and simple in process. The synthesized tin-titanium oxide solid solution nano sol is water-based, defects in the prior art are overcome, environmental pollution is avoided, synthesizing of water-based sol at normal pressure and low temperature is achieved, and film forming is easy.

Description

technical field [0001] This project involves a synthesis method of tin dioxide / titanium dioxide solid solution nano-sol composite material and a preparation method of the corresponding transparent conductive film, which belongs to the field of inorganic non-metallic materials. Background technique [0002] SnO 2 It can be used in gas sensors, resistors, transparent heating elements, catalysts and solar cells, and has attracted considerable attention in scientific research and industrial applications. However, SnO 2 Semiconductors have a relatively wide band gap of 3.6eV, which is a typical insulator. Only by doping them can various functional products be obtained. For example, through the SnO 2 The doping of the thin layer greatly reduces its resistance, resulting in a good conductive film. [0003] SnO 2 -TiO 2 It is a widely studied oxide-doped SnO 2 Composite materials are widely used in photocatalysis, conductive powder and other fields. SnTiO solid solution nano...

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Problems solved by technology

[0004] The current preparation methods (such as solid phase sintering, hydrothermal method, etc.) have certain limitations. For example, the patent No. 02109076.9 reports that titanium tetrachloride and tin tetrachloride are used as raw materials, and obtained by hydrolysis and alkali neutralization. Precipitation is a method of treating nanocomposite particles with the precipitate obtained by filtration in a high-temperature and high-pressure reactor, but their reaction temperature is generally high, the requirements for equipment are high, and the energy consumption is also large; at the same time, the obtained product also has poor dispersion. The problem of easy agglomeration, such as the patent No. 200510031659, reports that SnO that is miscible in any proportion can be prepared 2 -TiO 2 compound, but it is obtained as a powder

[0005] Although there are also some reports on the preparation of nano-sol at low temperature, as the patent No. 200710067939.X reports the in-situ synthesis method of tin-titanium sol, organic solvents and organic reagents are used in large quantities in these methods, which not only improves the quality of the product Production cost and certain harm to the environment restrict the large-scale production and industrial application of nanomaterials

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