Highly sensitive and selective trimethylamine sensors using Ru-doped SnO2 hollow spheres

被引：75

作者：

Kim, Kang-Min ^{[1
]}

Choi, Kwon-Il ^{[1
]}

Jeong, Hyun-Mook ^{[1
]}

Kim, Hyo-Joong ^{[1
]}

Kim, Hae-Ryong ^{[1
]}

Lee, Jong-Heun ^{[1
]}

机构：

[1] Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2012年 / 166卷

关键词：

Ru-SnO2; Hollow spheres; Trimethylamine; Gas sensors; FILM GAS SENSOR; OXIDE THIN-FILM; SENSING PROPERTIES; FRESHNESS; FISH; NANOSTRUCTURES; MICROSPHERES; RUTHENIUM; MECHANISM; TIO2;

D O I：

10.1016/j.snb.2012.03.049

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The 0.45 mol% Ru-doped SnO2 (Ru-SnO2) hollow spheres, each with a shell thickness of similar to 17 nm, were prepared by the uniform coating of Ru- and Sn-precursors onto SiO2 microspheres with diameters of similar to 300 nm, followed by heat treatment at 350 degrees C and subsequent: removal of the core SiO2 using a dilute HF solution. The Ru-SnO2 hollow spheres showed high responses to 5 ppm trimethylamine (TMA) at 350 degrees C with negligible cross-responses to toluene. benzene, NH3, CO, H-2, and C3H8 and decreased cross-responses to C2H5OH, while undoped SnO2 hollow spheres showed similar responses to TMA and C2H5OH. The selective and sensitive detection of TMA that was achieved in Ru-doped SnO2 hollow spheres is explained in relation to the catalytic sensitization of Ru and the gas-accessible hollow morphology of the thin shell configurations. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：733 / 738

页数：6

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