Journal
NPG ASIA MATERIALS
Volume 8, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/am.2016.35
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Funding
- Korean Center for Artificial Photosynthesis [NRF-2011-C1AAA0001-2011-0030278]
- MISIP
- Ministry of Trade, Industry and Energy (MOTIE), Republic of Korea [10050509]
- Basic Science Research Program through National Research Foundation of Korea - Ministry of Science, ICT and Future Planning [NRF-2015-01003143]
- National Research Foundation of Korea [2009-0093880, 2015R1A2A2A01003143] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Silicon nanosheets have attracted much attention owing to their novel electronic and optical properties and compatibility with existing silicon technology. However, a cost-effective and scalable technique for synthesizing these nanosheets remains elusive. Here, we report a novel strategy for producing silicon nanosheets on a large scale through the simultaneous molten-salt-induced exfoliation and chemical reduction of natural clay. The silicon nanosheets thus synthesized have a high surface area, are ultrathin (similar to 5 nm) and contain mesoporous structures derived from the oxygen vacancies in the clay. These advantages make the nanosheets a highly suitable photocatalyst with an exceptionally high activity for the generation of hydrogen from a water-methanol mixture. Further, when the silicon nanosheets are combined with platinum as a cocatalyst, they exhibit high activity in KOH (15.83 mmol H-2 per s per mol Si) and excellent photocatalytic activity with respect to the evolution of hydrogen from a water-methanol mixture (723 mu mol H-2 per h per g Si).
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