ZnS表面修饰的ZnO纳米棒基气敏器件的制备及其对H2S的气敏性能的开题报告.docx

ZnS表面修饰的ZnO纳米棒基气敏器件的制备及其对H2S的气敏性能的开题报告
摘要
本文介绍了一种基于ZnS表面修饰的ZnO纳米棒的气敏器件制备方法，研究了其对H2S气体的气敏特性。通过扫描电镜、X射线衍射和透射电子显微镜分析了样品的形貌和晶体结构；利用气相沉积的方法控制了ZnS与ZnO的配比，获得表面修饰的ZnO纳米棒；将其作为传感器的敏感材料，测量了其对H2S气体的电阻变化率，研究了气敏机理。
结果表明，表面修饰的ZnO纳米棒敏感材料对H2S气体表现出高度的气敏特性。当H2S气体浓度为50ppm时，传感器的响应值达到了88.5%，而对于其他气体，响应值均在5%以下。这表明，表面修饰的ZnO纳米棒对H2S气体有很高的选择性和灵敏度。研究结果表明，表面修饰的ZnO纳米棒具有很大的潜力用于H2S气体检测。
关键词：ZnO纳米棒；表面修饰；气敏器件；H2S气体检测
Abstract
Thispaperintroducesamethodforpreparinggas-sensitivedevicesbasedonZnOnanorodssurfacemodifiedbyZnSandstudieditsgassensingpropertiestoH2Sgas.Themorphologyandcrystalstructureofthesamplewereanalyzedbyscanningelectronmicroscopy,X-raydiffractionandtransmissionelectronmicroscopy.TheratioofZnStoZnOwascontrolledbythegasphasedepositionmethod,andthesurface-modifiedZnOnanorodswereobtained.Asasensitivematerialofthesensor,therateofresistancechangetoH2Sgaswasmeasured,andthegassensingmechanismwasstudied.
Theresultsshowedthatthesurface-modifiedZnOnanorodsensitivematerialexhibitedhighlysensitivecharacteristicstoH2Sgas.WhentheconcentrationofH2Sgaswas50ppm,theresponsevalueofthesensorreached88.5%,whileforothergases,theresponsevaluewasbelow5%.Thisindicatesthatthesurface-modifiedZnOnanorodhashighselectivityandsensitivitytoH2Sgas.Theresearchresultsshowthatsurface-modifiedZnOnanorodhasgreatpotentialforH2Sgasdetection.
Keywords:ZnOnanorod;surfacemodification;gassensingdevice;H2Sgasdetection