https://scholars.lib.ntu.edu.tw/handle/123456789/370429
標題: | Synthesis of mesoporous titania thin films (MTTFs) with two different structures as photocatalysts for generating hydrogen from water splitting | 作者: | Liao, Yu-Te Huang, Chao-Wei Liao, Chi-Hung Wu, Jeffery C.-S. Wu, Kevin C.-W. Liao, Y.-T. Huang, C.-W. Liao, C.-H. Wu, J.C.-S. Wu, K.C.-W. KEVIN CHIA-WEN WU JEFFREY CHI-SHENG WU |
關鍵字: | Hydrogen; Mesoporous; Photocatalyst; Thin films; Titania; Water splitting | 公開日期: | 2012 | 卷: | 100 | 起(迄)頁: | 75-80 | 來源出版物: | Applied Energy | 摘要: | We researched the structural effect of titania photocatalysts on the yield of hydrogen gas from water splitting. We synthesized mesoporous titania thin films (MTTFs) with two different structures (that is, pillar structure and tube structure, denoted as P-MTTFs and T-MTTFs, respectively) through an evaporation-induced self-assembling (EISA) process with the presence of a surfactant as a structure-directing agent. The synthesized MTTFs were carefully characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV-Vis spectra. After analysis of photocurrent and hydrogen generation, we concluded that with different structures, MTTFs generate photocurrents and hydrogen with different efficiencies. The results indicated that the T-MTTF had a higher net current (i.e., 1.05. E-3. eV) than the P-MTTF (i.e., 1.04. E-3. eV). However, the yield of hydrogen from T-MTTFs (i.e., 17.5 μmol) was lower than that of P-MTTFs (i.e., 37.5 μmol). Tube structure induced a concentration gradient of NaOH, which restrained the generation of oxygen and hydrogen. © 2012 Elsevier Ltd. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-84867728553&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/370429 |
DOI: | 10.1016/j.apenergy.2012.02.053 | SDG/關鍵字: | Hydrogen; Mesoporous materials; Photocatalysts; Scanning electron microscopy; Semiconductor quantum wells; Surface active agents; Thin films; Titanium dioxide; Tubes (components); X ray diffraction; Concentration gradients; Different structure; Hydrogen gas; Hydrogen generations; Mesoporous; Mesoporous titania thin film; Pillar structure; Self-assembling; Structural effect; Structure directing agents; Titania; Titania photocatalyst; Tube structures; UV-vis spectra; Water splitting; Hydrogen production; catalyst; film; hydrogen; titanite; ultraviolet radiation; visible spectrum; X-ray diffraction |
顯示於: | 化學工程學系 |
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