Preparation and Gas-sensing Properties of Cu2+-doped ZnO Nanorods

doi:10.3724/SP.J.1077.2012.11780

Abstract

Abstract: Cu²⁺-doped ZnO nano-rod powders (0–6mol%) were prepared via solvothermal method. The crystal and micro-morphology of the doped ZnO nano-rods were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The effects of Cu²⁺ dopant and the thermal condition (reaction temperature and duration) on the gas sensitivities of ZnO nano-rods were studied. The gas sensing properties of pure ZnO nanorod sensor and 3mol% Cu²⁺-doped ZnO nano-rod sensors to formaldehyde, acetic acid, toluene, ethanol, acetone and trimethylamine were also studied. The results show that the micro-morphology of ZnO powders are nano-rods, the lengths and diameters of ZnO nanorods change with the variation of the Cu²⁺ concentration. The sensor based on 3mol% Cu²⁺-doped ZnO nano-rods exhibits high response and good selectivity to dilute ethanol, the responses to 1×10^-3 ethanol and 1×10^–6 ethanol reach 380.5 and 4.2 when it works at 395℃, respectively, and its response time and recovery time are 16 s and 40 s, respectively.

Key words: ZnO, nano-rods, gas sensing properties

CLC Number:

TQ174

CHEN Tong-Yun, ZHU Xiao-Hua, CHU Xiang-Feng, GE Xiu-Tao, DONG Yong-Ping, YE Ming-Fu. Preparation and Gas-sensing Properties of Cu²⁺-doped ZnO Nanorods[J]. Journal of Inorganic Materials, 2012, 27(10): 1089-1094.

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Preparation and Gas-sensing Properties of Cu²⁺-doped ZnO Nanorods

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