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Research Of Copper Oxide Semiconductor Nanomaterials And Their Gas Sensing Devices

Posted on:2018-03-12Degree:MasterType:Thesis
Country:ChinaCandidate:F WangFull Text:PDF
GTID:2348330533957954Subject:Integrated circuit engineering
Abstract/Summary:PDF Full Text Request
Air pollution problems are drawing more and more people's attention with the development of human society and modern industry.The gas sensor based on various oxide semiconductors are used to detect toxic and harmful gases at present.In this thesis,nanometer scale copper oxide semiconductor were synthesized,which were applied successfully to fabricate the indirectly heated gas sensor in order to implement the gas detection of low-concentration common reducing Volatile Organic Compounds in environment for human life and production.The following research work was carried out:The problem of long-term poor adhesion that easy to fall off the ceramic material has been improved through CuO gas sensitive materials were grown on the outer wall of the ceramic tube of the gas sensor by sol-gel and thermal annealing process for the first time.The crystal structure and micromorphology of nanoparticles CuO were characterized by XRD,XPS and SEM.The gas sensor with nanoparticles CuO as the sensitive material was fabricated,which optimum working parameters were also measured.Finally,the gas sensitivity of the sensor to methanol,ethanol and acetone was obtained.The experimental results show that the nanoparticles CuO gas sensor prepared by this method has a good response to the reducing organic volatile gas at low concentration.The doping modification of the nanoparticle CuO gas sensor has been studied by incorporating the appropriate amount of AgNO3 and(CH3COO)2Zn·2H2O in the sol solution.The effects of doping on the gas sensing properties of CuO nanoparticles were investigated by using formaldehyde,ethanol,acetone and other gases.Nano linear CuO was prepared by chemical precipitation method to study the gas sensing properties of nanoCuO materials with different micromorphologies,which was applied to fabricatethe indirectly heated gas sensor.The optimum working parameters of nanometer linear CuO gas sensor and the gas-sensing response to formaldehyde,ethanol and acetone has been studied.The experimental results show that the nanometer linear CuO gas sensor prepared by this method is also suitable for the high sensitivity detection of reducing Organic Compounds,meanwhile,the the power consumption is reduced.
Keywords/Search Tags:nanostructure copper oxide, gas sensor, gas sensing properties
PDF Full Text Request
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