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Synthesis of mesoporous titania thin films (MTTFs) with two different structures as photocatalysts for generating hydrogen from water splitting

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  • Liao, Yu-Te
  • Huang, Chao-Wei
  • Liao, Chi-Hung
  • Wu, Jeffery C.-S.
  • Wu, Kevin C.-W.

Abstract

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., 1.05E−3eV) than the P-MTTF (i.e., 1.04E−3eV). However, the yield of hydrogen from T-MTTFs (i.e., 17.5μmol) was lower than that of P-MTTFs (i.e., 37.5μmol). Tube structure induced a concentration gradient of NaOH, which restrained the generation of oxygen and hydrogen.

Suggested Citation

  • Liao, Yu-Te & Huang, Chao-Wei & Liao, Chi-Hung & Wu, Jeffery C.-S. & Wu, Kevin C.-W., 2012. "Synthesis of mesoporous titania thin films (MTTFs) with two different structures as photocatalysts for generating hydrogen from water splitting," Applied Energy, Elsevier, vol. 100(C), pages 75-80.
    • Handle: RePEc:eee:appene:v:100:y:2012:i:c:p:75-80
    DOI: 10.1016/j.apenergy.2012.02.053
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    1. U. Bach & D. Lupo & P. Comte & J. E. Moser & F. Weissörtel & J. Salbeck & H. Spreitzer & M. Grätzel, 1998. "Solid-state dye-sensitized mesoporous TiO2 solar cells with high photon-to-electron conversion efficiencies," Nature, Nature, vol. 395(6702), pages 583-585, October.
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    2. Duan, Huiling & Xuan, Yimin, 2014. "Enhanced optical absorption of the plasmonic nanoshell suspension based on the solar photocatalytic hydrogen production system," Applied Energy, Elsevier, vol. 114(C), pages 22-29.
    3. Cheng, Ya-Hsin & Nguyen, Van-Huy & Chan, Hsiang-Yu & Wu, Jeffrey C.S. & Wang, Wei-Hon, 2015. "Photo-enhanced hydrogenation of CO2 to mimic photosynthesis by CO co-feed in a novel twin reactor," Applied Energy, Elsevier, vol. 147(C), pages 318-324.
    4. Kang, Zhenye & Mo, Jingke & Yang, Gaoqiang & Li, Yifan & Talley, Derrick A. & Retterer, Scott T. & Cullen, David A. & Toops, Todd J. & Brady, Michael P. & Bender, Guido & Pivovar, Bryan S. & Green, Jo, 2017. "Thin film surface modifications of thin/tunable liquid/gas diffusion layers for high-efficiency proton exchange membrane electrolyzer cells," Applied Energy, Elsevier, vol. 206(C), pages 983-990.
    5. Delavari, Saeed & Amin, Nor Aishah Saidina, 2016. "Photocatalytic conversion of CO2 and CH4 over immobilized titania nanoparticles coated on mesh: Optimization and kinetic study," Applied Energy, Elsevier, vol. 162(C), pages 1171-1185.
    6. He, Yan-Rong & Yan, Fang-Fang & Yu, Han-Qing & Yuan, Shi-Jie & Tong, Zhong-Hua & Sheng, Guo-Ping, 2014. "Hydrogen production in a light-driven photoelectrochemical cell," Applied Energy, Elsevier, vol. 113(C), pages 164-168.

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