Lanthanum-yttrium-codoped nano-titanium dioxide gas-sensitive material as well as preparation method and application thereof

A technology of nano-titanium dioxide and gas-sensing materials, applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology for materials and surface science, etc., can solve the problems of rare gas-sensing materials or gas-sensing sensors, and achieve Improved gas sensing performance, improved stability, and high sensitivity
CN103159255BInactive Publication Date: 2015-03-11QUFU NORMAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
QUFU NORMAL UNIV
Publication Date
2015-03-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a lanthanum-yttrium-codoped nano-titanium dioxide gas-sensitive material as well as a preparation method and an application thereof. The material is prepared by the steps of: by taking nano-titanium dioxide as a matrix and the amount of titanium substances as a base number, doping 0.1-0.8 mol% of lanthanum and 0.1-0.8 mol% of yttrium, dripping ethanol solution of tetrabutyl titanate into the ethanol solution of lanthanum nitrate and yttrium nitrate by utilizing a sol-gel method to prepare sol, and drying, grinding and roasting the sol. The grain diameter of the obtained lanthanum-yttrium-codoped nano-titanium dioxide is 35-70 nm. The invention further provides the preparation method of the material. The obtained gas-sensitive material is used for producing gas-sensitive sensors for detecting o-chlorophenol, is high in sensitivity, good in selectivity and short in response time and is beneficial for realizing fast detection of the o-chlorophenol.
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Description

technical field

[0001] The invention relates to a lanthanum-yttrium co-doped nano-titanium dioxide gas-sensing material and a preparation method and application thereof, belonging to the technical field of gas-sensing materials. Background technique

[0002] Ortho-chlorophenol, namely 2-chlorophenol, is an important chemical raw material, which is widely used in organic synthesis and the manufacture of dyes. Because it is easy to volatilize and cause serious harm to animals, plants, water and soil, it is identified as a persistent organic pollutant. At present, gas chromatography and chromatography / mass spectrometry are mainly used for the detection of o-chlorophenol. Because these methods require large precision instruments and are inconvenient to carry, the application of real-time detection is limited. How to quickly and accurately detect o-chlorophenol has become one of the focuses of attention.

[0003] The research on making nanomaterials into gas sensors to detect ...

Claims

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