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Sensors 2015, 15(6), 14230-14240;

Synthesis and Gas Sensing Properties of Single La-Doped SnO2 Nanobelts

Institute of Physics and Electronic Information Technology, Yunnan Normal University, Kunming 650500, China
Author to whom correspondence should be addressed.
Academic Editor: W. Rudolf Seitz
Received: 12 April 2015 / Accepted: 3 June 2015 / Published: 16 June 2015
(This article belongs to the Section Chemical Sensors)
Full-Text   |   PDF [2581 KB, uploaded 16 June 2015]   |  


Single crystal SnO2 nanobelts (SnO2 NBs) and La-SnO2 nanobelts (La-SnO2 NBs) were synthesized by thermal evaporation. Both a single SnO2 NB sensor and a single La-SnO2 NB sensor were developed and their sensing properties were investigated. It is found that the single La-SnO2 NB sensor had a high sensitivity of 8.76 to ethanediol at a concentration of 100 ppm at 230 °C, which is the highest sensitivity of a single SnO2 NB to ethanediol among three kinds of volatile organic (VOC) liquids studied, including ethanediol, ethanol, and acetone. The La-SnO2 NBs sensor also exhibits a high sensitivity, good selectivity and long-term stability with prompt response time to ethanediol. The mechanism behind the enhanced sensing performance of La-doped SnO2 nanobelts is discussed. View Full-Text
Keywords: La-doped SnO2 nanobelts; single nanobelt; gas sensor; ethanediol La-doped SnO2 nanobelts; single nanobelt; gas sensor; ethanediol

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Wu, Y.; Zhang, H.; Liu, Y.; Chen, W.; Ma, J.; Li, S.; Qin, Z. Synthesis and Gas Sensing Properties of Single La-Doped SnO2 Nanobelts. Sensors 2015, 15, 14230-14240.

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