Method for preparing stannic oxide by dissolution pyrolysis method

Abstract

The invention discloses a method to prepare tin oxide by dissolving pyrolysis, which comprises: dissolving the tin source and organic acid in reactor at 20-290Deg; stirring and reacting for 0.1-240h to obtain the predecessor; putting the predecessor into muffle furnace for calcining and pyrolysis at temperature more than 280Deg to obtain the product. Wherein, selecting on organic acid arbitrarily from the acetic acid, oxalic acid, citric acid, tartaric acid or aconitic acid; between the dissolution and pyrolysis, using any one of water, alcohol, ethyl ether, acetone or chloroform to clear the predecessor. This invention is simple and low cost, and has high purity.

Description

technical field [0001] The invention relates to a method for preparing functional materials, in particular to a method for preparing tin oxide by dissolution and pyrolysis. Background technique [0002] Tin oxide is the most widely used gas-sensing material so far. It has the characteristics of low price, good mechanical, chemical and thermal stability, and fast response speed, and the selectivity to gas can be adjusted by doping different elements. The special pores in the structure of tin oxide can be suitable for the transport of ions in it, so it can be used as an anode material for lithium-ion batteries. Tin oxide is a good catalyst and catalyst carrier. It has a strong complete oxidation ability and has a good effect on the oxidation of organic matter. It can catalyze the fumarate reaction and the oxidation of CO. Tin oxide has excellent optoelectronic properties and can be used to make transparent electrodes, solar energy conversion materials, conductive materials, e...

AI Technical Summary

Problems solved by technology

Solid phase reaction method and mechanical pulverization method are difficult to produce uniform ultrafine particles, which cannot be used in production. Metal salt decomposition method is to decompose organic tin salt at high temperature to obtain tin oxide powder. The shape and size of the prepared micropowder depend on the parent group In addition to its characteristics and characteristics, it is also affected by the decomposition temperature and atmospheric pressure, so the process of preparing uniform ultrafine tin oxide powder by solid-state method has yet to be developed.

Moreover, although the combustion synthesis of the solid-state reaction has the advantages of simplicity and speed, the excessive use of organic matter causes high costs. At the same time, the large amount of heat generated during the combustion process will cause the powder particles to grow abnormally.