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Reduction of Graphene Oxide and its Effect on Square Resistance of Reduced Graphene Oxide Films
Zhaoxia Hou,Yin Zhou,Guangbin Li,Shaohong Wang,Meihan Wang,Xiaodan Hu,Siming Li 대한화학회 2015 Bulletin of the Korean Chemical Society Vol.36 No.6
Graphite oxide was prepared via the modified Hummers’ method and graphene via chemical reduction. Deoxygenation efficiency of graphene oxide was compared among single reductants including sodium borohydride, hydrohalic acids, hydrazine hydrate, and vitamin C. Two-step reduction of graphene oxide was primarily studied. The reduced graphene oxide was characterized by XRD, TG, SEM, XPS, and Raman spectroscopy. Square resistance was measured as well. Results showed that films with single-step N2H4 reduction have the best transmittance and electrical conductivity with square resistance of ~5746 Ω/sq at 70% transmittance. This provided an experimental basis of using graphene for electronic device applications.
Song Han,Wei Liu,Shaoshuai Wu,Zhaoxia Long,Qingxi Hou 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
Effects of four different kinds of industrial grade MgO as one alkali source in the alkaline peroxidebleaching of poplar chemi-thermomechanical pulp (CTMP) were investigated. The particle size andactivity of the MgO played the most important role in the improvement of optical and strengthproperties of the bleached CTMP. At a 25% substitution percentage of MgO for NaOH, a 77.4%ISObrightness and the optimal tensile index of the bleached CTMP could be obtained. When industrial gradeMgO was applied, appropriate increase in Na2SiO3 dosage and pulp consistency could improve thebrightness and strength properties of the bleached CTMP.