Hydrothermal synthesis of hierarchically porous Rh-doped ZnO and its high gas sensing performance to acetone

被引：22
作者：
Chen, Ziwei [1 ]
Lin, Zhidong [1 ]
Hong, Yuyuan [1 ]
Li, Na [1 ]
Xu, Mengying [1 ]
机构：
[1] Wuhan Inst Technol, Prov Key Lab Plasma Chem & Adv Mat, Wuhan 430074, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2016年 / 27卷 / 03期
基金：
中国国家自然科学基金;
关键词：
CONTROLLABLE SYNTHESIS; SENSORS; PROPERTY; NANORODS; NANOSTRUCTURES; NANOPARTICLES;
D O I：
10.1007/s10854-015-4069-x
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The hierarchically porous Rh-doped ZnO and pure ZnO samples have been successfully synthesized through a simple hydrothermal reaction process at 180 degrees C. The morphology and composition were carefully characterized by X-ray diffraction, field emission scanning electronic microscopy, transmission electron microscopy and BET. Gas-sensing testing results demonstrated that ZnO doped with 1 mol% Rh significantly improve gas sensitivity from pure ZnO. The high sensitivity of the sensor based on 1 mol% Rh doping ZnO was of 142-100 ppm acetone, the response increased linearly with the concentration of acetone in the range of 50-1500 ppm. All the response and recovery times of the sensors were less than 20 s at a low working temperature of 340 degrees C. The improved response of Rh-doped ZnO sensor was related to the electronic interaction of Rh2O3 and ZnO due to heterojunction formation. The good sensing performances of the Rh-doped ZnO sensor indicated that hierarchically porous Rh-doped ZnO could be a promising candidate for highly sensitive gas sensors.
引用
收藏
页码：2633 / 2639
页数：7
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