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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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TiO2 oxide semiconductor is being widely studied in various applications such as photocatalyst and photosensor. Pd/TiO2 gas sensor is mainly used to detect H2, CO and ethanol. This study focus on increasing hydrogen detection ability of Pd/TiO2 in room temperature through Al-doping. Pd/TiO2 was fabricated by the hydrothermal method. Contacting to Aluminum (Al) foil led to Al doping effect in Pd/TiO2 by thermal diffusion and enhanced hydrogen sensing response. TiO2 nanoparticles were sized at ~30 nm of diameter from scanning electron microscope (SEM) and maintained anatase crystal structure after Al doping from X-ray diffraction analysis. Presence of Al in TiO2 was confirmed by X-ray photoelectron spectroscopy at 73 eV. SEM-energy dispersive spectroscopy measurement also confirmed 2 wt% Al in Pd/TiO2 bulk. The gas sensing test was performed with O2, N2 and H2 gas ambient. Pd/Al-doped TiO2 did not response O2 and N2 gas in vacuum except H2. Finally, the normalized resistance ratio (RH2on/RH2off) of Pd/Al-doped TiO2 increases about 80% compared to Pd/TiO2.
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참고문헌 (11)
참고문헌 신청
G. Bokerman / 2011 / Chemochromic Hydrogen Sensors, Google Patents
G. Eranna / 2004 / Oxide materials for development of integrated gas sensors-A comprehensive review / Crit. Rev. Sold State 29 : 111 ~ 188
J. O'Connor / 2003 / Surface Analysis Methods in Materials Science / Springer
L. Schlapbach / 2001 / Hydrogen-storage materials for mobile applications / Nature 414 : 353 ~ 358
M. Alexander / 2002 / Quantification of oxide film thickness at the surface of aluminium using XPS / Surf. Interface Anal. 34 : 485 ~ 489
G. Eranna / 2004 / Oxide materials for development of integrated gas sensors-A comprehensive review / Crit. Rev. Sold State 29 : 111 ~ 188
J. O'Connor / 2003 / Surface Analysis Methods in Materials Science / Springer
L. Schlapbach / 2001 / Hydrogen-storage materials for mobile applications / Nature 414 : 353 ~ 358
M. Alexander / 2002 / Quantification of oxide film thickness at the surface of aluminium using XPS / Surf. Interface Anal. 34 : 485 ~ 489
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