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Au@TiO2 core-shell decorated rGO nanocomposite (NC) was prepared using a simple solvothermal method followed by heat treat- ment for gas sensor application. The crystal structure and morphology of the composites were characterized by X-ray powder diffractionand transmission electron microscopy, respectively. The NO2 sensing response of the Au@TiO2/rGO NC was tested at operating tem- peratures from 250°C to 500°C, and was compared with those of the bare rGO and Au@TiO2 core-shell NPs. The Au@TiO2/rGO NC-based sensor showed a far higher response than the rGO or Au@TiO2 core-shell based sensors, with the maximum response detectedwhen the operating temperature was 400°C. This improved response was due to the high rGO gas absorption capability for NO2 gas and the catalytic effect of Au@TiO2 core-shell NPs in oxidizing NO2 to NO3.
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참고문헌 (21)
참고문헌 신청
S. Zhuiykov / 2008 / Carbon monoxide detection at low temperatures by semiconductor sensor with nanostructured Audoped CoOOH films / Sens. Actuators B 129(1):431~441
N. L. Hung / 2010 / Enhancement of CO gas sensing properties in ZnO thin films deposited on self-assembled Au nanodots / Sens. Actuators B 151(1):127~132
Y. J. Chiang / 2013 / PdO nanoflake thin films for co gas sensing at low temperatures / J. Phys. Chem. C 117(30):15593~15601
G. Neri / 2008 / Resistive CO gas sensors based on In2O3 and InSnOx nanopowders synthesized via starch-aided sol-gel process for automotive applications / Sens. Actuators B 132(1):224~233
J. Tan / 2007 / Nitrogen dioxide gas sensors based on titanium dioxide thin films deposited on langasite / Thin Solid Films 515(24):8738~8743
N. L. Hung / 2010 / Enhancement of CO gas sensing properties in ZnO thin films deposited on self-assembled Au nanodots / Sens. Actuators B 151(1):127~132
Y. J. Chiang / 2013 / PdO nanoflake thin films for co gas sensing at low temperatures / J. Phys. Chem. C 117(30):15593~15601
G. Neri / 2008 / Resistive CO gas sensors based on In2O3 and InSnOx nanopowders synthesized via starch-aided sol-gel process for automotive applications / Sens. Actuators B 132(1):224~233
J. Tan / 2007 / Nitrogen dioxide gas sensors based on titanium dioxide thin films deposited on langasite / Thin Solid Films 515(24):8738~8743
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