A gas sensor based on Ga-doped SnO2 porous microflowers for detecting formaldehyde at low temperature

被引：40

作者：

Du, Liting ^{[1
]}

Li, Haiying ^{[1
]}

Li, Shuo ^{[1
]}

Liu, Li ^{[1
]}

Li, Yu ^{[1
]}

Xu, Suyan ^{[2
]}

Gong, Yimin ^{[1
]}

Cheng, Yali ^{[1
]}

Zeng, Xiangan ^{[1
]}

Lian, Qingcheng ^{[3
]}

机构：

[1] Jilin Univ, Coll Phys, State Key Lab Superhard Mat, Changchun 130012, Jilin, Peoples R China

[2] Dehui Secondary Vocat & Tech Sch, Changchun 130300, Jilin, Peoples R China

[3] Changchun Univ Sci & Technol, Sch Mat Sci & Engn, Changchun 130013, Jilin, Peoples R China

来源：

CHEMICAL PHYSICS LETTERS | 2018年 / 713卷

关键词：

Ga-doped SnO2 porous microflowers; Gas sensor; Hydrothermal; Formaldehyde; SENSING PROPERTIES; HYDROTHERMAL SYNTHESIS; MICROSPHERES; NANOSTRUCTURES; NANOFIBERS; IN2O3; NANOPARTICLES; SENSITIVITY; SELECTIVITY; MICROCUBES;

D O I：

10.1016/j.cplett.2018.10.052

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ga-doped and undoped SnO2 porous microflowers (SPMs) were synthesized by a facile hydrothermal method. The presence of Ga in the SPMs and their structure was determined by X-ray powder diffraction (XRD), energy-dispersive spectroscopy (EDS), X-ray photoelectric spectroscopy (XPS) and scanning electron microscopy (SEM). Compared with the pure SPM sensor, the 3 wt% Ga-doped SPM sensor exhibits a lower detection limit (3.0/ 0.1 ppm) and improved sensitivity (95.8/50 ppm) to formaldehyde at 230 degrees C, which is 4.5 times greater than the pure SPM sensor (21.2/50 ppm). Furthermore, the Ga-doped sensor shows a short response-recovery time (3/ 39 s) and good selectivity for formaldehyde.

引用

页码：235 / 241

页数：7

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