Significant enhancement of the NO2 sensing capability in networked SnO2 nanowires by Au nanoparticles synthesized via γ-ray radiolysis

被引：59

作者：

Choi, Sun-Woo ^{[1
]}

Jung, Sung-Hyun ^{[1
]}

Kim, Sang Sub ^{[1
]}

机构：

[1] Inha Univ, Sch Mat Sci & Engn, Inchon 402751, South Korea

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2011年 / 193卷

基金：

新加坡国家研究基金会;

关键词：

Au nanoparticles; gamma-Ray radiolysis; Functionalization; SnO2; nanowires; Gas sensors; GOLD NANOPARTICLES; GAS SENSORS; COMPOSITE NANOPARTICLES; CARBON NANOTUBES; CO; PARTICLES; GROWTH; OXIDES;

D O I：

10.1016/j.jhazmat.2011.07.053

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

gamma-Ray radiolysis was applied to the synthesis of Au nanoparticles. The growth behavior of Au nanoparticles was systematically investigated as a function of the processing parameters under gamma-ray radiolysis. The surface of the networked SnO2 nanowires fabricated through the vapor-phase selective growth process was uniformly functionalized with the Au nanoparticles by the gamma-ray radiolysis process. Au nanoparticle-functionalized SnO2 nanowires were compared to bare SnO2 nanowires in terms of the NO2 sensing characteristics. Au functionalization sharply improved the sensitivity and response time of SnO2 nanowire-based gas sensors, most likely due to the spillover and the catalytic effects of Au nanoparticles. The methodology used in this work can be easily extended to synthesize various combinations of metal nanoparticles and oxide nanowires, which may be useful materials for use in detecting hazardous substances. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：243 / 248

页数：6

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