Highly sensitive acetone gas sensor based on porous ZnFe2O4 nanospheres
Highly sensitive acetone gas sensor based on porous ZnFe2O4 nanospheres
复制标题
基于多孔ZnFe2O4纳米球的高灵敏度丙酮气体传感器
DOI：
10.1016/j.snb.2014.09.080
复制
发表时间：
2015
影响因子：
8.4
通讯作者：
Lu Geyu
中科院分区：
文献类型：
--
作者：
Zhou Xin;Liu Jiangyang;Wang Chen;Sun Peng;Hu Xiaolong;Li Xiaowei;Shimanoe Kengo;Yamazoe Noboru;Lu Geyu
采用乙醇/乙二醇（EG）二元溶剂，通过无模板溶剂热法合成了ZnFe 2 O 4前驱体，并对其进行退火处理，成功地制备了ZnFe 2 O 4多孔球形结构。采用各种技术表征所得产物的结构和形态。结果表明，样品由大量的纳米级初级粒子构成的平均粒径约为230 nm的ZnFe 2 O 4多孔纳米球组成。并以此为基础制备了气敏元件，对其气敏性能进行了研究。结果表明，在200 °C的工作温度下，该传感器对丙酮具有良好的选择性，对12-30 ppm丙酮的响应比ZnFe 2 O 4纳米颗粒传感器高2.5倍。多孔ZnFe 2 O 4纳米球的气敏性能的提高归因于其独特的结构。
Porous ZnFe2O4spherical structures built from nanoparticles were successfully synthesized by annealing the precursor, which was synthesized via a simple template-free solvothermal route with ethanol/ethylene glycol (EG) binary solvents. Various techniques were employed for the characterization of the structure and morphology of as-obtained products. The results revealed that the samples were composed of large amounts of porous ZnFe2O4nanospheres with an average diameter around 230 nm, which were constructed by plenty of nano-sized primary particles. Moreover, gas sensor based on the as-prepared samples was fabricated and its sensing performances were investigated. It was revealed that the as-fabricated sensor device exhibited excellent selectivity toward acetone at the operating temperature 200 °C and had a response of about 12–30 ppm acetone, which was about 2.5 times higher than that of sensor based on ZnFe2O4nanoparticles. The enhancement in gas sensing properties of porous ZnFe2O4nanospheres was attributed to their unique structures.