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Surface acoustic wave ammonia sensor based on ZnO/SiO2 composite film.
Wang, Shuang-Yue; Ma, Jin-Yi; Li, Zhi-Jie; Su, H Q; Alkurd, N R; Zhou, Wei-Lie; Wang, Lu; Du, Bo; Tang, Yong-Liang; Ao, Dong-Yi; Zhang, Shou-Chao; Yu, Q K; Zu, Xiao-Tao.
Affiliation
  • Wang SY; Institute of Fundamental and Frontier Sciences and School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, PR China.
  • Ma JY; Sichuan Institute of Piezoelectric and Acousto-Optic Technology, Chongqing 400060, PR China.
  • Li ZJ; Institute of Fundamental and Frontier Sciences and School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, PR China.
  • Su HQ; Advanced Materials Research Institute, University of New Orleans, LA 70148, USA.
  • Alkurd NR; Advanced Materials Research Institute, University of New Orleans, LA 70148, USA.
  • Zhou WL; Advanced Materials Research Institute, University of New Orleans, LA 70148, USA.
  • Wang L; Sichuan Institute of Piezoelectric and Acousto-Optic Technology, Chongqing 400060, PR China.
  • Du B; Sichuan Institute of Piezoelectric and Acousto-Optic Technology, Chongqing 400060, PR China.
  • Tang YL; Institute of Fundamental and Frontier Sciences and School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, PR China.
  • Ao DY; Institute of Fundamental and Frontier Sciences and School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, PR China.
  • Zhang SC; Institute of Fundamental and Frontier Sciences and School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, PR China.
  • Yu QK; Ingram School of Engineering, and Materials Science, Engineering and Commercialization Program, Texas State University, San Marcos, TX 78666, USA.
  • Zu XT; Institute of Fundamental and Frontier Sciences and School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, PR China. Electronic address: xtzu@uestc.edu.cn.
J Hazard Mater ; 285: 368-74, 2015 Mar 21.
Article in En | MEDLINE | ID: mdl-25528236
ABSTRACT
A surface acoustic wave (SAW) resonator with ZnO/SiO2 (ZS) composite film was used as an ammonia sensor in this study. ZS composite films were deposited on the surface of SAW devices using the sol-gel method, and were characterized using SEM, AFM, and XRD. The performance of the sensors under ammonia gas was optimized by adjusting the molar ratio of ZnOSiO2 to 11, 12 and 13, and the sensor with the ratio of ZnO to SiO2 equaling to 12 was found to have the best performance. The response of sensor was 1.132 kHz under 10 ppm NH3, which was much higher than that of the sensor based on a pristine ZnO film. Moreover, the sensor has good selectivity, reversibility and stability at room temperature. These can be attributed to the enhanced absorption of ammonia and unique surface reaction on composite films due to the existence of silica.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Zinc Oxide / Silicon Dioxide / Ammonia Language: En Journal: J Hazard Mater Journal subject: SAUDE AMBIENTAL Year: 2015 Document type: Article
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Zinc Oxide / Silicon Dioxide / Ammonia Language: En Journal: J Hazard Mater Journal subject: SAUDE AMBIENTAL Year: 2015 Document type: Article