期刊
NANOTECHNOLOGY
卷 27, 期 43, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/27/43/435405
关键词
graphene; surface plasmonic resonance; TiO2 beads; hydrogen production; silver nanoparticles; water splitting
资金
- Ministry of Science and Technology in Taiwan [MOST 104-2221-E-006-026-MY3]
- Headquarters of University Advancement at National Cheng Kung University - Ministry of Education, Taiwan
In this work, a novel configuration of the photoelectrochemical hydrogen production device is demonstrated. It is based on TiO2 beads as the primary photoanode material with the addition of a heterostructure of silver nanoparticles/graphene. The heterostructure not only caters to a great improvement in light harvesting efficiency (LHE) but also enhances the charge collection efficiency. For LHE, the optimized cell based on TiO2 beads/Ag/graphene shows a 47% gain as compared to the cell having a photoanode of commercial P25 TiO2 powders. For the charge collection efficiency, there is a pronounced improvement of an impressive value of 856%. The reason for the improvement in light absorption is attributed to either the light scattering of TiO2 beads or the surface plasmonic resonance on the Ag nanoparticles/graphene. The photoconversion efficiency (PCE) of the resulting cells is also presented and discussed. The PCE of the TiO2 beads/Ag/graphene cell is approximately 2.5 times than that of pure P25 cell.
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