Synthesis of 1-dimensional ZnO and its sensing property for CO

被引：39

作者：

Chen Liangyuan ^{[2
]}

Liu Zhiyong ^{[1
]}

Bai Shouli ^{[1
]}

Zhang Kewei ^{[1
]}

Li Dianqing ^{[1
]}

Chen Aifan ^{[1
]}

Liu, Chung Chiun ^{[2
]}

机构：

[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

[2] Case Western Reserve Univ, Dept Chem Engn, Cleveland, OH 44106 USA

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2010年 / 143卷 / 02期

基金：

北京市自然科学基金; 中国国家自然科学基金;

关键词：

ZnO nanorods; Hydrothermal synthesis; CO; Sensing property; CONTROLLABLE GROWTH; NANORODS; NANOSTRUCTURES; MECHANISM;

D O I：

10.1016/j.snb.2009.10.009

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

One-dimensional (1D) needle-like ZnO nanorods with aspect ratio about 50 were successfully synthesized by a sodium dodecylsulphate (SDS)-assisted hydrothermal process at lower temperature (85 degrees C). The morphology and structure of crystals were characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD) analysis. Experimental results show that SDS, ratio of OH-/Zn2+ and hydrothermal reaction time play important roles in the formation and oriented growth of ZnO nanorods. Gas sensors have been fabricated using 1D ZnO powders to examine the response towards 40 ppm CO over a range of operating temperature from 150 degrees C to 450 degrees C. The highest response is 49.58 at the operating temperature of 400 degrees C. The response was greatly enhanced by doping Nd element as Surface modifier or ZrO2 as secondary oxide. The effect of doping on the ZnO structure and gas sensing has been discussed by X-ray photoelectron spectroscopy (XPS) analysis. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：620 / 628

页数：9

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