Tin-doped layered porous nanometer zinc oxide as well as preparation method and application thereof

Abstract

The invention provides tin-doped layered porous nanometer zinc oxide. The tin-doped layered porous nanometer zinc oxide is characterized in that the tin-doped layered porous nanometer zinc oxide is of a three-dimensional porous layered structure formed by crystal particles and nanopores on the whole, the thickness of each layer of tin-doped layered porous nanometer zinc oxide is about 10-20nm, the length of each layer of tin-doped layered porous nanometer zinc oxide is about 0.8-1.2 micrometers, the width of each layer of tin-doped layered porous nanometer zinc oxide is about 300-700nm, and the tin doping content is 0.1-22.0at.%. A typical preparation method of the tin-doped layered porous nanometer zinc oxide comprises the steps of weighing zinc salt, dissolving the zinc salt by adding water, adding stannous chloride according to proportions, stirring so as to form white emulsion, slowly adding polyhydric alcohols (such as ethylene glycol, glycerol, 1,2-propylene glycol, 1,4-butanediol) till forming semitransparent light white mixed liquid, transferring the mixed liquid to a reaction kettle, sealing the reaction kettle, carrying out thermal reaction by adding hot water, then carrying out solid-liquid separation on a reaction product after the reaction, and washing and drying the solid product. The tin-doped layered porous nanometer zinc oxide provided by the invention has excellent gas-sensitive property for volatile organic compounds, and has the advantages of simple method and low cost.

Description

technical field [0001] The invention relates to the field of gas sensors, in particular to a tin-doped layered porous nano-zinc oxide used for detecting volatile organic compound gas sensors and its preparation method and application. Background technique [0002] Volatile organic compounds (volatile organic compounds, VOCs) refer to various organic compounds with a boiling point of 50°C-260°C at room temperature. According to their chemical structure, VOCs can be further divided into: alkanes, aromatics, esters, aldehydes and others. More than 300 species have been identified so far. The most common ones are benzene, toluene, xylene, styrene, trichloroethylene, chloroform, trichloroethane, diisocyanate (TDI), diisocyanocresyl, etc. When the concentration of volatile organic compounds in the indoor air is too high, it is easy to cause acute poisoning. In mild cases, headache, dizziness, cough, nausea, vomiting, or drunkenness will occur; in severe cases, liver poisoning or...

AI Technical Summary

Problems solved by technology

[0004] Although the performance of the gas-sensing materials used in the currently prepared VOCs gas sensors and reported in the literature has been improved to a certain extent, they are still limited to the optimization of a single unit and cannot meet the requirements for the benzene series in VOCs in real life. Especially the detection requirements for benzene gas, which is difficult to detect and has carcinogenic effects (requires the minimum detection concentration to be at the ppb level)

Images