Synthesis, UV response, and room-temperature ethanol sensitivity of undoped and Pd-doped coral-like SnO2
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- 作者：Chunliang Guo ; Zhidong Lin ; Wenlong Song ; Xuehua Wang…
- 关键词：Coral ; like SnO2 ; Pd ; doped ; Gas sensing ; UV light
- 刊名：Journal of Nanoparticle Research
- 出版年：2013
- 出版时间：October 2013
- 年：2013
- 卷：15
- 期：10
- 全文大小：544KB
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Zhidong Lin (1)
Wenlong Song (1)
Xuehua Wang (1)
Yangyi Huang (1)
Ke Wang (1)
1. Provincial Key Laboratory of Plasma Chemistry & Advanced Materials, Wuhan Institute of Technology, Wuhan, 430074, People’s Republic of China - ISSN：1572-896X
文摘
Coral-like mesoporous SnO2 was synthesized by controlled hydrolysis of SnCl4 and subsequent removal of the template by calcination in air. The obtained powder was doped directly with palladium chloride solution. The morphology, crystal structure, specific surface area, and photoelectrical and ethanol gas-sensing properties of undoped and Pd-doped coral-like SnO2 were investigated. The average crystalline sizes of undoped and Pd-doped SnO2 were estimated by Williamson–Hall plots to be 10.3 and 10.0?nm, respectively. From the N2 adsorption–desorption analysis, the pure sample had a surface area 63.3?m2/g with pore size distribution narrowly centered around 5.7?nm. The film sensors based on undoped and Pd-doped SnO2 exhibited novel photoelectrical properties. The photocurrents of the sensors decreased with increasing UV light intensity. The response of the Pd-doped SnO2 sensor to 500 ppm ethanol was 35.3 under UV illumination at room temperature. The results demonstrated that Pd doping could achieve room-temperature detection to ethanol under UV light radiation.