Preparation method for gold-loaded tin oxide nanometer material for detecting hydrogen

Abstract

The invention relates to a preparation method for a gold-loaded tin oxide nanometer material for detecting hydrogen. In order to deal with the conditions that hydrogen detecting gas sensitive materials are low in sensitivity, low in response speed and poor in stability, the gold-loaded tin oxide nanometer material is made from potassium stannate, chloroauric acid and glucose and prepared through the steps of hydro-thermal synthesis through a reaction still, vacuum heat treatment and grinding and sieving. According to the preparation method, the process is advanced, and data are full and accurate; products are atropurpureus crystals, the crystal particle diameter is smaller than or equal to 80 nm, and the product purity is high and reaches 99.6%; the gas sensitivity of the material on 100 ppm hydrogen reaches 25, response time is 1 s, and recovery time is 3 s; the sensitivity is high, response and recovery are fast, and the material can be applied to a gas sensor for detecting hydrogen. The preparation method for the gold-loaded tin oxide nanometer material is quite advanced.

Description

technical field [0001] The invention relates to a method for preparing a gold-supported tin oxide nanometer material for detecting hydrogen, and belongs to the technical field of preparation and application of gas-sensitive materials. Background technique [0002] Hydrogen is a clean energy with abundant reserves, high energy, and recyclability. Hydrogen has been used in various industrial fields, such as: high-energy batteries, glass manufacturing, steel smelting, petroleum refining, internal combustion engines, metal cutting, etc.; but hydrogen is A colorless, tasteless, odorless, flammable and explosive gas with an explosion range of 4%-75%; hydrogen is easy to cause leakage during storage, transportation and use, how to detect and prevent hydrogen leakage is very important research topic. [0003] Chromatographic analysis and mass spectrometry are commonly used in the detection of conventional hydrogen, but these equipment are bulky, the detection procedures are complic...

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Problems solved by technology

[0003] Chromatographic analysis and mass spectrometry are commonly used in the detection of conventional hydrogen, but these equipment are bulky, the detection procedures are complicated, and the error is relatively large; the more advanced hydrogen detection method is to use gas sensors, which can directly detect various technical parameters of hydrogen; gas Most of the detection materials used in sensors are gas-sensitive materials, such as zinc oxide, tin oxide, titanium oxide, and tungsten oxide, but most of these gas-sensitive materials have low sensitivity, slow response speed, and poor stability, and it is difficult to meet the requirements of gas sensors; To improve the high performance requirements of gas sensors, the gas-sensing materials are often doped with load agents to enhance the gas-sensing properties of the gas-sensing materials. This technology is still under study

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