Design of highly sensitive and selective xylene gas sensor based on Ni-doped MoO3 nano-pompon

被引：88

作者：

Jiang, Wenhao ^{[1
]}

Meng, Lingling ^{[1
]}

Zhang, Sufang ^{[1
]}

Chuai, Xiaohong ^{[1
]}

Zhou, Zhijie ^{[2
]}

Hu, Changhua ^{[2
]}

Sun, Peng ^{[1
]}

Liu, Fangmeng ^{[1
]}

Yan, Xu ^{[1
]}

Lu, Geyu ^{[1
]}

机构：

[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Key Lab Gas Sensors, 2699 Qianjin St, Changchun 130012, Jilin, Peoples R China

[2] Rocket Force Univ Engn, Xian 710000, Shaanxi, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2019年 / 299卷

基金：

中国国家自然科学基金;

关键词：

Gas sensor; MoO3; nano-pompons; Ni-doping; Xylene; SENSING PROPERTIES; HOLLOW SPHERES; THIN-FILMS; ALPHA-MOO3; ZNO; PERFORMANCE; NANOSTRUCTURES; NANOLAMELLA; NANOFLOWERS; NANOFIBERS;

D O I：

10.1016/j.snb.2019.126888

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

MoO3 gas-sensing materials with different Ni2+ doping concentration were prepared by a simple one-step sol-vothermal method. The phase structure, micro-structure and morphology of the as-prepared samples were characterized by X-ray powder diffraction (XRD), field emission scanning electron microscope (FESEM) and the transmission electron microscope (TEM) etc., respectively. The morphology can be changed by adjusting the doping concentration of Ni2+. Among them, the 5 mol% Ni-doped MoO3 sample with a pompon-like morphology improved gas accessibility significantly. Prominently, the response of the sensors on xylene was increased 18 times from 3.48 to 62.6, the response time was about 1 s and the best selectivity was obtained at the optimum temperature of 250 degrees C. These breakthroughs are attributed to the increase of surface-active sites and the improvement of micro-morphology caused by Ni2+ doping.

引用

页数：9

共 57 条

[1] NOx sensors based on semiconducting metal oxide nanostructures: Progress and perspectives [J].