碩士 / 國立高雄應用科技大學 / 化學工程與材料工程系碩士在職專班 / 101 / Visible-light responsive evolution of hydrogen on Pt/CdS/N-doped mesoporous TiO2 from photocatalytic water splitting
Student：Yao-Zhang Huang Advisors：Dr. Shou-Heng Liu
Department of Chemical and Materials Engineering
National Kaohsiung University of Applied Sciences
Abstract
A simple method was developed to fabricate CdS/nitrogen doped mesoporous TiO2 through evaporation induced self-assembly by using an ionic liquid simultaneously as nitrogen sources and a mesopore creator and Cd(NO3)2 as Cd precursors, respectively. Then, the CdO on nitrogen doped mesoporous TiO2 can be ion exchanged with Na2S to form CdS/N-doped mesoporous TiO2 photocatalyst. Finally, different amounts of Pt were deposited on CdS/N-doped mesoporous TiO2 by impregnation method. These Pt/CdS/N-doped mesoporous TiO2 samples were fully characterized by a series of spectroscopic and analytical techniques, such as small- and large-angle X-ray diffraction (XRD), N2 adsorption-desorption isotherms, transmission electron microscopy (TEM), Raman, ultraviolet-visible (UV-vis) diffuse reflectance and X-ray photoelectron (XPS) spectroscopies. Photocatalytic splitting of water by these photocatalysts under visible light was also performed in this stduy.
The UV-vis spectra indicated that absorbance of CdS/N-doped mesoporous TiO2 red-shifted to visible area (ca. 510 nm). Moreover, after depositing Pt, the intensity of visible light absorption was significantly enhanced. In the photocatalytic splitting of water under visible light, we found that higher amounts of Pt on CdS/N-doped mesoporous TiO2 could enhance hydrogen evolution, which may due to the fact that Pt metals hindered recombination rate of electron-hole.
Keywords: nitrogen-doping mesoporous TiO2, Pt, CdS, EISA, water splitting by visible light.
| Identifer | oai:union.ndltd.org:TW/101KUAS1063017 |
| Date | January 2013 |
| Creators | Yao-Zhang Huang, 黃耀樟 |
| Contributors | Shou-Heng Liu, 劉守恒 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 81 |
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