Study of Material Properties and Solar Energy Conversionof Plasmonic/MesoporousCarbon /Titanium OxideCocatalysts

• Main Authors: Sz Nian Lai, 賴思年
• Other Authors: Wei Hsuan Hung
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/81479453266051738619

碩士 === 逢甲大學 === 材料科學與工程學系 === 103 === This study introduced a new composite photoelectrode plasmonic metal nanoparticles (NPs) - titanium dioxide (TiO2) - ordered mesoporous carbon material (CMK-3) for water splitting application. TiO2 and CMK-3 were successfully fabricated by using facile solution-based process and hard template method, followed by the plasmonic metal deposition process. The optimal mixing ratio of TiO2-CMK-3 photoelectrode was determined by the photocurrent response during the water splitting process. Remarkably, CMK-3 not only enhanced incident photon capture rate but also improved mass transfer effect for the electrolyte at the surface of photoelectrode. Consequently, two orders of magnitude of the enhanced water splitting photocurrent was obtained in the TiO2-CMK-3 composite photoelectrode with respect to TiO2 only under 532 nm laser irradiation. Furthermore, with the integration of gold (Au) and silver (Ag) plasmonic nanoparticles, water-splitting photocurrents were significantly improved due to strong light scattering and near fields from the surface plasmon resonance metal NPs. The detail enhanced mechanism of these composite plasmonic photoelectrodes were systematically investigated by using different structural configurations and light sources. Finally, we also demonstrated spatially resolved mapping photocurrents in this work for the potential large area fabrication.