摘要
以废弃的柳絮为模板,通过简单的硝酸锌/铟盐(n(Zn)∶n(In)=1∶0.15)浸渍和500℃空气热解法,成功合成了由均匀纳米粒子复制的仿生形态In_(2)O_(3)/ZnO异质纤维管,其丰富的氧空位(V_(O))缺陷和n-n异质界面,可促进电子的快速迁移和暴露更多的反应位点。在低的92℃下,In_(2)O_(3)/ZnO传感器对10×10^(-6)NO_(2)气体的响应值达到225,明显好于迄今报道的多数ZnO基气体传感器,且具有快的响应/恢复特性(35 s/20 s)、低的实际检测限(50×10^(-9))以及好的60 d稳定性和耐湿性。因此,它有望成为一种低能耗下快速和准确检测痕量NO_(2)气体的敏感材料。
In_(2)O_(3)/ZnO fibrous hetero-tubes with bionic structure formed by uniform nanoparticles were successfully synthesized through simple zinc nitrate/indium salt(n(Zn)∶n(In)=1∶0.15)immersion and air calcination at 500℃by using waste willow catkins as template.It possesses abundant oxygen vacancy(V_(O))defects and n-n hetero-interfaces,which can promote the rapid diffusion of electrons and expose more reactive sites.At a low temperature of 92℃,the response value of In_(2)O_(3)/ZnO sensor to 10×10^(-6)NO_(2)gas reaches a response value of 225,which is significantly better than most reported ZnO-based gas sensor.It also has fast response/recovery characteristics(35 s/20 s),low practical detection limit(50×10^(-9)),good stability over 60 d and humidity resistance.Therefore,In_(2)O_(3)/ZnO sensor is expected to enable rapid and accurate detection of trace NO_(2)at low energy consumption.
作者
吕明松
李亚男
邓兆鹏
高山
LU Mingsong;LI Yanan;DENG Zhaopeng;GAO Shan(Key Laboratory of Functional Inorganic Material Chemistry,Ministry of Education,School of Chemistry and Materials Science,Heilongjiang University,Harbin 150080,China)
出处
《黑龙江大学自然科学学报》
2025年第4期423-430,共8页
Journal of Natural Science of Heilongjiang University
基金
中央支持地方高校改革发展资金(高水平人才项目)。
