期刊
MATERIALS RESEARCH BULLETIN
卷 98, 期 -, 页码 314-321出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2017.10.034
关键词
Solar light; Photocatalytic water splitting; Reduced graphene oxide; TiO2 nanotubes; Supercapacitor
资金
- UNIST (Ulsan National Institute of Science Technology) [1.170013.01]
- Energy Technology Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea [20153030012870]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2017R1A2A2A05000770]
Herein, we discuss the synthesis of reduced graphene oxide and TiO2 (rGO-TiO2) nanocomposites with varying ratios of rGO to TiO2 by hydrothermal method. Photocatalytic ability of the nanocomposites was assessed for H-2 production under natural sunlight. At 5 wt% GO loading, the rGO-TiO2 exhibited 24,880 mu mol/g/h H-2, 12.9 times to commercial P25-TiO2 (1920 mu mol/g/h). The symmetric supercapacitor device fabricated using rGO-TiO2 demonstrated 160 F/g specific capacitance with 99% retention. The efficient charge carrier separation and transportation between TiO2 nanotubes and rGO resulted high photocatalytic activity. The synergistic double layer pseudo capacitor behavior of rGO-TiO2 is the reason for improved specific capacitance.
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