Reduction of free-standing graphene oxide papers by a hydrothermal process at the solid/gas interface
作者： Hong Chen , Zhanyu Song , Xiaochong Zhao , Xin Li , Hong Lin
DOI: 10.1039/C2RA21576D
关键词: Raman spectroscopy 、 Electrical resistivity and conductivity 、 X-ray photoelectron spectroscopy 、 Chemistry 、 Oxide 、 Inorganic chemistry 、 Hydrothermal circulation 、 Graphene 、 Graphene oxide paper 、 Infrared spectroscopy
摘要: Chemical reduction of free-standing graphene oxide papers at a solid/gas interface by hydrothermal process has been developed. Graphene in autoclaves were kept from contacting de-ionized water to form the between steam and papers. Ammonia was also introduced into system improve reduction. The influences temperature, reducing time ammonia concentration on electrical conductivity reduced GO examined. Reduction under optimum conditions produced relatively high 2283 S m−1. Structural evolution studied Fourier-transform infrared spectroscopy, X-ray diffraction, Raman photoelectron spectroscopy. characterizations showed that oxygen functional groups effectively removed interfacial reduction, especially with addition ammonia. Fitting results for high-resolution spectra further indicated doping N atoms replacing C skeleton sheets responsible improved conductivity.
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