کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1414191 | 1508887 | 2013 | 8 صفحه PDF | دانلود رایگان |
Nano graphene oxide (NGO) was produced by further refluxing graphene oxide (GO) sheets in HNO3, and carboxylic acid functionalized graphene oxide (GO–COOH) was obtained by a simple etherification reaction between GO and chloroacetic acid. The GO, GO–COOH and NGO sheets are combined with TiO2 nanorods by a two-phase assembling method, and confirmed by transmission electronic microscopy. The GO–TiO2, GO–COOH–TiO2 and NGO–TiO2 composites are used in a comparative study of photocatalytic H2 generation activity under UV light irradiation. The H2 generation rate of TiO2 nanorods was slightly increased from 15 to 30 mL h−1 g−1 by replacing oleic acid ligands with hydrophilic dopamine, and significantly increased to 105 mL h−1 g−1 after combining with GO sheets. The further comparative study shows that GO–COOH–TiO2 composite has higher H2 generation rate of 180 mL h−1 g−1 than that of GO–TiO2 and NGO–TiO2 composites.
Journal: Carbon - Volume 60, August 2013, Pages 445–452