摘要
以钼酸铵为原料,利用酒石酸辅助水热法一步合成了球状纳米结构的MoO_2,利用XRD和TEM对样品的结构、微观形貌进行分析。将样品制成旁热式气敏元件,并对其气敏特性进行了测试。研究结果表明,酒石酸在水热合成过程中对产物的形貌和相行为起决定性的作用,而且对气敏材料的气敏性影响显著。取适量的酒石酸,可有效提高传感器的灵敏度。在260℃工作温度下,MoO_2纳米球气敏元件对10×10^(-6)乙醇气体的灵敏度达3.9,并具有良好的选择性。
Molybdenum dioxide nanospheres were synthesized with （NH4）6Mo7O24· 4H2O and HCl as the startingmaterials by tartaric acid-assisted one-step hydrothermal method. The structure and morphology of the samples wereanalyzed by XRD and TEM. Heater -type gas sensors are fabricated from the samples and their gas -sensingproperties are measured. The results show that the dosage of tartaric acid play a decisive role in determining themorphology and phase behaviors of the products, and it has a significant influence on the gas sensitivity of thesensitive material. The right amount of tartaric acid doped effectively improves the sensitivity. The sensitivity ofMoO2 nanospheres to10×10-6ethanol gas is 3.9 at 260 ℃. In addition, the sensor possesses an excellent selectivity forethanol.
出处
《中国钨业》
CAS
北大核心
2017年第5期58-63,共6页
China Tungsten Industry
基金
新疆高校科研计划重点项目(XJEDU2013I36)
关键词
水热法
纳米MoO2
酒石酸
气敏特性
hydrothermal treatment
nanosheres MoO2
tartaric acid
gas sensing property
