| Summary: | 碩士 === 國立成功大學 === 化學工程學系碩博士班 === 96 === In this study, a novel surfactant TEOA-C10 was synthesized to prepare anatase titania nanoparticles with secondary structures by a surfactant-assisted self-assembling process. The crystal lattice planes of the second structure were aligned with each other due to the “oriented attachment” mechanism, which is expected to increase the rate of electron transfer through the highly crystallized second structure. The grain size and secondary structure were controlled by changing the mole ratio of TEOA-C10 to titanium precursor and the temperature of the hydrothermal via control of the grain size, second structure, and thermal stability for the TiO2 second structure. A single-crystalline anatase photoelectrode adsorbed mercurochrome dye about 4~5 times higher as compared to P25.
A light-to-electricity conversion yield of 1.31% was achieved by applying the titania nanomaterials with 2 micrometer thin film, and it can increase to 1.68~1.69%, if using double layer photoelectrode made by anatase titania nanoparticle and P25. When the dye was changed from mercurochrome to N719, double layer still can improve the light-to-electricity conversion efficiency from 3.91% to 4.57%.
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