Sb掺杂金红石型TiO_2微球水热合成与气敏性能研究  

Study of Hydrothermal Preparation and Gas-sensing Properties of Sb-doped Rutile TiO_2 Microspheres

作　　者：黄苏萍[1] 胡昆[1] 欧阳林莉[2] 魏曙光[3] 陈枫[3] 肖奇[3] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083 [2]湖南有色金属研究院,湖南长沙410100 [3]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《湖南有色金属》2016年第4期51-53,76,共4页Hunan Nonferrous Metals

基　　金：国家自然科学基金项目(51102285)

摘　　要：采用水热法制备了不同Sb掺杂量的TiO_2微球,并用XRD和FE-SEM对样品进行表征。XRD结果表明,未掺杂和Sb掺杂样品均为纯金红石相;FE-SEM表明纯TiO_2微球和Sb掺杂TiO_2微球分别以纳米颗粒、纳米棒为组成单元。气敏测试结果表明,Sb掺杂使金红石TiO_2气敏元件的最佳工作温度由掺杂前的350℃降低至掺杂后的200℃,其中Sb掺杂量为7.5%的TiO_2气敏元件的灵敏度最高,在200℃下对100×10-6C2H5OH的灵敏度为11.82,响应时间为28 s,恢复时间为6 s,检测下限可达到10×10-6。Sb-doped rutile TiO2 microspheres with varied dopant concentrations were synthesized through hydrothermal method under acid condition. Its component, morphology were investigated by X-ray diffraction （XRD）, Field Emission Scanning electron microscope（FE-SEM）. Results showed that all of the samples are rutile. The FE-SEM patterns show that the Sb-deposed TiO2 microspheres are composed of nanorods with alengh of aboutl m instead of nanoparticles. Sb doping decreased the optimal working temperature from 350 ℃ to 200℃. When the doping amount is 7.5% ,its gas-sensitive properties was best. The 7.5% Sb-doped TiO2 show the highest response with a value of 11.82 under 200 ℃ condition, and the response time was 28 s, recovery time was 6 s. The detection limit of C2H OH was 10 × 10^-6.

关 键 词：Sb掺杂 TiO2微球 金红石 气敏 

分 类 号：TF803.13[冶金工程—有色金属冶金]