期刊
RSC ADVANCES
卷 5, 期 18, 页码 13544-13549出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra15820b
关键词
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资金
- National Natural Science Foundation of China [51202208, 51172191, 11274264]
- Scientific Research Fund of Hunan Provincial Education Department [12B129]
- National Basic Research Program of China [2012CB921303]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT13093]
A facile and effective procedure for the synthesis of quasi-vertically aligned TiO2/Bi2S3 core-shell nanowire arrays (NWAs) is reported. The nontoxic and earth abundant Bi2S3 was assembled onto the hydrothermal pre-grown TiO2 NWAs via a successive ionic layer adsorption and reaction (SILAR) method. The morphologies, microstructures, and optical properties of the pristine TiO2 and composite TiO2/Bi2S3 with different SILAR circles were characterized in detail. For photoelectrochemical (PEC) measurements, the TiO2/ Bi2S3 core-shell NWAs exhibited not only an enhanced photocurrent density (2.8 times higher than that of pristine TiO2), but also a negatively shifted onset potential from 0.067 to -0.072 V vs. RHE, as compared to the TiO2. This better PEC performance results from the broadened light absorption and the improved charge carrier separation efficiency. Our results provide a green photoelectrode for PEC hydrogen generation.
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