Synthesis, UV response, and room-temperature ethanol sensitivity of undoped and Pd-doped coral-like SnO2

  • Chunliang Guo
  • Zhidong Lin
  • Wenlong Song
  • Xuehua Wang
  • Yangyi Huang
  • Ke Wang
Research Paper
First Online:
Received:
Accepted:

Abstract

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.

Keywords

Coral-like SnO2 Pd-doped Gas sensing UV light 
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Notes

Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (No. 51072141).

Supplementary material

11051_2013_1998_MOESM1_ESM.tif (1.1 mb)
Supplementary material 1 (TIFF 1130 kb)

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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Chunliang Guo
    • 1
  • Zhidong Lin
    • 1
  • Wenlong Song
    • 1
  • Xuehua Wang
    • 1
  • Yangyi Huang
    • 1
  • Ke Wang
    • 1
  1. 1.Provincial Key Laboratory of Plasma Chemistry & Advanced MaterialsWuhan Institute of TechnologyWuhanPeople’s Republic of China

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