Pt nanoparticles decorated SnO2 nanoneedles for efficient CO gas sensing applications

被引：271

作者：

Zhou, Qu ^{[1
]}

Xu, Lingna ^{[1
,2
]}

Umar, Ahmad ^{[3
,4
]}

Chen, Weigen ^{[2
]}

Kumar, Rajesh ^{[5
]}

机构：

[1] Southwest Univ, Coll Engn & Technol, Chongqing 400715, Peoples R China

[2] Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Se, Chongqing 400030, Peoples R China

[3] Najran Univ, Dept Chem, Coll Sci & Arts, POB 1988, Najran 11001, Saudi Arabia

[4] Najran Univ, PCSED, POB 1988, Najran 11001, Saudi Arabia

[5] JCDAV Coll, PG Dept Chem, Dasuya 144205, Punjab, India

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2018年 / 256卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Pt-decorated SnO2; Nanoneedles; Hydrothermal; Gas sensor; Carbon monoxide; TIN OXIDE-FILMS; THIN-FILMS; FACILE SYNTHESIS; DOPED ZNO; PD NANOPARTICLES; ZINC-OXIDE; SENSOR; TEMPERATURE; NANOSTRUCTURES; MICROSPHERES;

D O I：

10.1016/j.snb.2017.09.206

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Herein, we report the synthesis, characterization, and gas sensing applications of Pt nanoparticlesdecorated SnO2 nanoneedles synthesized through a facile hydrothermal process. The synthesized nanoneedles were characterized for their morphological, structural, compositional and sensing properties using different characterization techniques. The morphological and structural characterizations confirmed the synthesis of well crystalline Pt nanoparticles decorated SnO2 nanoneedles with tetragonal rutile crystal phase. X-ray photoelectron spectroscopic analysis (XPS) confirmed the spatial distribution of Pt metal into SnO2 nanoneedles. Further, gas sensor applications of the synthesized nanoneedles were studies at different operating temperatures and concentrations of the CO gas. The detailed CO gas sensing analysis revealed that at an optimized temperature of 250 degrees C, the sensor exhibited 23.18 gas response with the response and recovery times of 15 s and 14 s, respectively. The long-term stability and the selectivity of the 3.125 at% Pt-decorated SnO2 nanoneedles were also explored. Finally, a plausible gas sensing mechanism was also proposed. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：656 / 664

页数：9

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