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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한양대학교 세라믹공정연구센터 Journal of Ceramic Processing Research Journal of Ceramic Processing Research 제17권 제6호
- 발행연도
- 2016.6
- 수록면
- 523 - 531 (9page)
- DOI
- 10.36410/jcpr.2016.17.6.523
이용수
초록· 키워드
오류제보하기
We fabricated functionalized RGO that demonstrates excellent sensitivity to H2S gas. The functionalization process used GOsuspensions mixed with AgNO3, NaOH, and DI water. X-ray diffraction (XRD) and transmission electron microscopyindicated that the functionalizing structures were composed of cubic Ag and silver oxide (AgxOy) phases. Nanoparticles andnanorods with a cubic Ag phase were attached to the surface of the RGO. Raman spectra revealed that the structural disorderof the functionalized RGO was higher than that of pristine GO. The decrease of resistance by the introduction of H2S gasindicated that the functionalized RGO was an n-type sensor. Accordingly, we suggested that the n-type AgxOy, whose presencewas confirmed by XRD, should be a main current path for the sensor. A H2S gas sensing test revealed that the sensor responseat 50 ppm was about 1.65. With respect to H2S sensing mechanisms, we propose that the following four reasons could explainthe significant enhanced sensitivity by the functionalization: (i) reduction of the conduction volume by the conduction throughthe AgxOy structure rather than RGO, (ii) generation of silver sulfide structures, (iii) generation of an n-AgxOy/p-RGOheterointerface, and (iv) larger surface area of Ag/AgxOy structures. The Ag catalyst is not only the source of the AgxOy, butalso provides the spillover effect.
목차
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참고문헌 (67)
참고문헌 신청
Han Longxiang / 2014 / Preparation of Spherical Bi3.25La0.75Ti3O12 Nanocrystals by a Sol-Gel Inverse Mini-Emulsion Approach / Electronic Materials Letters 10(1):1~4
Sh. Valedbagi / 2014 / Ab initio Calculations of Electronic and Optical Properties of BeO Nanosheet / Electronic Materials Letters 10(1):5~11
M.S. Kale / 2014 / Structural, Optical and Thermo Electrical Properties of Nanostructured Vacuum Evaporated CdS Thin Films / Electronic Materials Letters 10(1):21~25
Santa Chawla / 2014 / White Light Emitting Magnetic ZnO:Sm Nanoparticles Prepared by Inclusive Co-Precipitation Synthesis / Electronic Materials Letters 10(1):73~80
Mohammad Khajelakzay / 2014 / Fabrication and Dielectric Properties of Pb(Zr0.52Ti0.48)O3 Nanofibers-Cement Composites / Electronic Materials Letters 10(1):117~120
Sh. Valedbagi / 2014 / Ab initio Calculations of Electronic and Optical Properties of BeO Nanosheet / Electronic Materials Letters 10(1):5~11
M.S. Kale / 2014 / Structural, Optical and Thermo Electrical Properties of Nanostructured Vacuum Evaporated CdS Thin Films / Electronic Materials Letters 10(1):21~25
Santa Chawla / 2014 / White Light Emitting Magnetic ZnO:Sm Nanoparticles Prepared by Inclusive Co-Precipitation Synthesis / Electronic Materials Letters 10(1):73~80
Mohammad Khajelakzay / 2014 / Fabrication and Dielectric Properties of Pb(Zr0.52Ti0.48)O3 Nanofibers-Cement Composites / Electronic Materials Letters 10(1):117~120
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