碩士 / 國立高雄應用科技大學 / 化學工程與材料工程系 / 99 / Nitrogen-doped mesoporous TiO2 materials were prepared by evaporation-induced self-assembly (EISA) using Pluronic F127, titanium isopropoxide, Urea and EMIC as templating agents, titanium sources and nitrogen sources, respectively. A variety of different spectroscopic and analytical techniques, such as small- and wide-angle powder X-ray diffraction (XRD), Brunauer-Emmet-Teller (BET) analysis, Raman scattering spectroscopy, UV-visible spectroscopic (UV-vis), Fourier Transform Infrared (FT-IR), X-ray Photoelectron Spectroscopy (XPS) and transmission electron microscopy (TEM) were used to characterize the physicochemical properties of various materials. Photocatalytic splitting of water by these photocatalysts under visible light was also examined in this study.
During the synthesis of mesoporous titania, it was found that the amount of ethanol solvents has a notable effect on EISA process. Among various concentrations of solvents, the well-defined structure of mesoporous TiO2 was obtained upon addition of 20 % Ethanol. In terms of nitrogen-doped mesoporous TiO2 synthesis, two different routes, namely using five different ratios of Ti/Urea in the sol-gel solutions during EISA and doping N by simultaneously utilizing EMIC as nitrogen sources and templates were investigated. Combined the SAXS and BET results, the catalysts prepared by the latter methods possessed mesoporous structure and relatively high specific surface areas of 101 m2/g which may lead to the enhanced photocatalytic activity using visible light.
| Identifer | oai:union.ndltd.org:TW/099KUAS8063033 |
| Date | January 2011 |
| Creators | Han-Ren Syu, 許瀚仁 |
| Contributors | Shou-Heng Liu, Tsung-Han Ho, 劉守恒, 何宗漢 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 166 |
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