Au doped ZnO/SnO2 composite nanofibers for enhanced H2S gas sensing performance

被引：43

作者：

Chu Manh Hung ^{[1
]}

Han Viet Phuong ^{[1
]}

Vu Van Thinh ^{[1
]}

Le Thi Hong ^{[1
]}

Nguyen Tat Thang ^{[1
]}

Nguyen Hong Hanh ^{[1
]}

Nguyen Quang Dich ^{[2
]}

Nguyen Van Duy ^{[1
]}

Nguyen Van Hieu ^{[3
,4
]}

Nguyen Duc Hoa ^{[1
]}

机构：

[1] Hanoi Univ Sci & Technol HUST, Int Training Inst Mat Sci ITIMS, 1 Dai Co Viet, Hanoi, Vietnam

[2] Hanoi Univ Sci & Technol HUST, Inst Control Engn & Automat ICEA, 1 Dai Co Viet, Hanoi, Vietnam

[3] Phenikaa Univ, Phenikaa Inst Adv Study PIAS, Fac Elect & Elect Engn, Hanoi 10000, Vietnam

[4] A&A Green Phoenix Grp, Phenikaa Res & Technol Inst PRATI, 167 Hoang Ngan, Hanoi 100000, Vietnam

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 2021年 / 317卷

关键词：

ZnO/SnO2; nanofibers; Au doped; Electrospinning; H2S gas sensor; HIGH-SENSITIVITY; SENSOR; NANOSHEETS; HYDROGEN; ETHANOL;

D O I：

10.1016/j.sna.2020.112454

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Nanofibers of ZnO-SnO2 nanocomposites doped with Au crystals were synthesized by an electrospinning method for enhancement of H2S gas sensing performance. The mixed solution of zinc acetate dihydrate and tin(II) chloride dihydrate, dissolved in ethanol/DMF solvent, was spun directly on the interdigital Pt electrodes for sensor fabrication. Thermal treatment was carried out to convert the spun nanofibers into ZnO-SnO2 nanocomposites doped with Au crystals. SEM and TEM observation confirmed the formation of porous nanofibers with an average diameter of about 120 nm. X-ray diffraction studies revealed that the nanocomposites of ZnO and SnO2 phases were formed, but not ZnSnO3, despite the precursor solution being mixed on the atomic scale from the starting solution. Doping with 0.001, 0.005 and 0.01 wt.% of Au slightly changed the morphology of the nanofibers because the Au was not doped into the crystals of ZnO or SnO2, but mostly existed as the surface decoration. This ensured that the effective surface catalyzed the gas reaction, thus enhance the sensing performance. Gas sensitivity to H2S gas was improved by approximately 700% with the optimal doping concentration of Au. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：12

共 56 条

[1] Electrospun Granular Hollow SnO2 Nanofibers Hydrogen Gas Sensors Operating at Low Temperatures [J].