李越湘.高效稳定的Al3 偶联多层Eosin Y敏化TiO2光催化制氢体系研究[J].分子催化,2010,(1):0
高效稳定的Al3 偶联多层Eosin Y敏化TiO2光催化制氢体系研究
Studies on high efficient and stable reaction system for photocatalytic hydrogen evolution with multilayer-Eosin
投稿时间:2009-12-31  修订日期:2010-01-26
DOI:
中文关键词:  多层Eosin Y  TiO2  制氢  Al3  甲醇体系
英文关键词:Multilayer-Eosin Y  TiO2  Hydrogen evolution  Al3  Methanol system
基金项目:
作者单位E-mail
李越湘* 南昌大学化学系 liyuexiang@sina.com 
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中文摘要:
      通过Al3+偶联制备了多层EosinY敏化的TiO2催化剂,其光催化制氢性能优于Fe3+偶联的催化剂。在水体系、甲醇-水体系中,以三乙醇胺(TEOA)作电子给体,采用原位载Pt,考察了催化剂在可见光(l>420 nm)下的制氢活性与稳定性。结果表明,含水0.5%(体积分数)的体系、载铂量为1.0wt% 时,显示了较高的活性和良好的稳定性,20 h的平均量子效率为20.5%,转换数为220。较高的活性和稳定性初步归结于Al3+水解趋势较Fe3+小,且催化剂在甲醇中比在水中更稳定,进一步的研究正在进行中。
英文摘要:
      An efficient visible-light active photocatalyst of multilayer-EosinY-sensitized TiO2 was prepared through linkage of Al3+ to form 3-dimensional polymeric dye structure. The performance of the as-prepared photocatalyst was compared with multilayer-Eosin Y-sensitized TiO2 via Fe3+ coupling. The activity and stability of multilayer-dye-sensitized photocatalyst were investigated in water and methanol reaction system using triethanolamine as electron donor under visible light irradiation (l>420 nm). The effects of water content in methanol and Pt loading content were studied. In methanol reaction system, the photocatalyst exhibited high activity and stability when water content was 0.5% (volume fraction) and Pt loading content was 1.0 wt%. Its average apparent quantum yield for hydrogen evolution was 20.5% in 20 h with 220 turnover number. The high activity and stability could be attributed to that hydrolysis of Al3+ is lower than that of Fe3+, and 3-dimensional polymeric dye structure with Al3+ in methanol system is more stable than in water system. The further studies are in progress.
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