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Sensors 2011, 11(2), 1261-1276; doi:10.3390/s110201261
Article

Preparation of Mesoporous and/or Macroporous SnO2-Based Powders and Their Gas-Sensing Properties as Thick Film Sensors

1
, 2
, 2,*  and 2
Received: 13 December 2010; in revised form: 10 January 2011 / Accepted: 19 January 2011 / Published: 25 January 2011
(This article belongs to the Special Issue Gas Sensors - 2010)
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Abstract: Mesoporous and/or macroporous SnO2-based powders have been prepared and their gas-sensing properties as thick film sensors towards H2 and NO2 have been investigated. The mesopores and macropores of various SnO2-based powders were controlled by self-assembly of sodium bis(2-ethylhexyl)sulfosuccinate and polymethyl-methacrylate (PMMA) microspheres (ca. 800 nm in diameter), respectively. The introduction of mesopores and macropores into SnO2-based sensors increased their sensor resistance in air significantly. The additions of SiO2 and Sb2O5 into mesoporous and/or macroporous SnO2 were found to improve the sensing properties of the sensors. The addition of SiO2 into mesoporous and/or macroporous SnO2 was found to increase the sensor resistance in air, whereas doping of Sb2O5 into mesoporous and/or macroporous SnO2 was found to markedly reduce the sensor resistance in air, and to increase the response to 1,000 ppm H2 as well as 1 ppm NO2 in air. Among all the sensors tested, meso-macroporous SnO2 added with 1 wt% SiO2 and 5 wt% Sb2O5, which were prepared with the above two templates simultaneously, exhibited the largest H2 and NO2 responses.
Keywords: mesopore; macropore; meso-macropore; SnO2 gas sensors; SiO2; Sb2O5 mesopore; macropore; meso-macropore; SnO2 gas sensors; SiO2; Sb2O5
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Yuan, L.; Hyodo, T.; Shimizu, Y.; Egashira, M. Preparation of Mesoporous and/or Macroporous SnO2-Based Powders and Their Gas-Sensing Properties as Thick Film Sensors. Sensors 2011, 11, 1261-1276.

AMA Style

Yuan L, Hyodo T, Shimizu Y, Egashira M. Preparation of Mesoporous and/or Macroporous SnO2-Based Powders and Their Gas-Sensing Properties as Thick Film Sensors. Sensors. 2011; 11(2):1261-1276.

Chicago/Turabian Style

Yuan, Luyang; Hyodo, Takeo; Shimizu, Yasuhiro; Egashira, Makoto. 2011. "Preparation of Mesoporous and/or Macroporous SnO2-Based Powders and Their Gas-Sensing Properties as Thick Film Sensors." Sensors 11, no. 2: 1261-1276.



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