摘要
采用低温沉淀法分别制备了纯的In_(2)O_(3)和Ni掺杂的In_(2)O_(3)纳米粉体。通过XRD、SEM和TEM等手段进行微观结构表征,并对粉体的气敏性能进行测试。结果表明:Ni的掺杂对针状形貌的形成具有直接而重要的作用,纯的In_(2)O_(3)为颗粒状结构,Ni掺杂的In_(2)O_(3)(In︰Ni摩尔比为9︰1)由大量的长度为0.4μm左右、直径为5 nm左右的针状结构所组成。其中,In︰Ni摩尔比为9︰1时所得到的Ni掺杂的In_(2)O_(3)纳米粉体(样品S4)在260℃工作温度下对50×10^(-6) Cl_(2)的灵敏度值为696.9±73.1,且具有选择性好、响应-恢复时间短等特性。最后,对可能的形貌生成机理进行了研究。
Needle-like Ni-doped In_(2)O_(3) is prepared by a facile chemical route under a low temperature of 60℃without any surfactant or template.The morphological features are analyzed by XRD,SEM and TEM,and the gas sensing characteristics of the obtained products are also studied.The results demonstrate that the doping of Ni plays a direct and important role in the formation of needle-like morphology,as the pure In_(2)O_(3) consists of large irregular nanospheres,while the Ni-doped In_(2)O_(3)(molar ratio of In︰Ni is 9︰1)consists of large needle-like with 5 nm in width and 0.4μm in length.The sensor based on the needle-like Ni-doped In_(2)O_(3)(sample S4)exhibits sensitivity of 696.9±73.1 for 50×10^(-6) Cl_(2) at 260℃.The sensor also has satisfactory selectivity,quickly response and short recover time.Finally,the formation mechanism is studied.
作者
周星宇
方正
李培
ZHOU Xingyu;FANG Zheng;LI Pei(School of Electrical Engineering and Automation,Jiangxi University of Science and Technology,Ganzhou 341000,China)
出处
《传感器与微系统》
CSCD
北大核心
2021年第9期14-17,21,共5页
Transducer and Microsystem Technologies
基金
江西省教育厅科学技术研究项目青年项目(GJJ180485)。
