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题名: Visible-light-driven photocatalytic H-2 evolution from aqueous suspensions of perylene diimide dye-sensitized Pt/TiO2 catalysts
作者: Chen, S (Chen, Shuai); Li, YX (Li, Yingxuan); Wang, CY (Wang, Chuanyi)
通讯作者: Wang, Chuanyi
关键词: GRAPHENE-BASED PHOTOCATALYSTS ; HYDROGEN-PRODUCTION ; WATER ; TIO2 ; GENERATION
刊名: RSC ADVANCES
发表日期: 2015
DOI: 10.1039/c4ra16245e
卷: 5, 期:21, 页:15880-15885
收录类别: SCI
摘要: TiO2 is among the most important semiconductor photocatalysts for solar light-driven H-2 production from photocatalytic water reduction. Commercialized mixed-phase Degussa P25 nanoparticles have been demonstrated as the most popular TiO2. However, its superiority cannot be exerted in the visible-light region. In this work, molecular aggregates of perylene tetracarboxylic diimide ( PTCDI, a kind of air-stable n-type organic semiconductor bearing an electron-rich phenylamino moiety and a dodecyl side-chain) were employed as a sensitizer to combine with Pt/TiO2 nanoparticles via solution processing. The PTCDI/Pt/TiO2 composites thus fabricated exhibit a broad visible-light response and excellent photochemical stability. The initial intramolecular charge transfer of PTCDI and its energy level being well matched to TiO2, ensure effective charge transfer among the PTCDI/Pt/TiO2 composite. When 25 mg of the composite powders are suspended in aqueous solution (100 mL) containing 10 mL of triethanolamine as a sacrificial electron donor, stable H-2 evolution with an activity of similar to 0.075 mu mol h(-1) is achieved under visible-light (lambda >= 420 nm) irradiation. Both intramolecular electron transfer from the electron rich 4-dimethylaminobenzyl group to the perylene core of PTCDI and the intermolecular charge transfer from PTCDI to TiO2 are key to the effective visible-light photoactivity.
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内容类型: 期刊论文
URI标识: http://ir.xjipc.cas.cn/handle/365002/4210
Appears in Collections:中国科学院特殊环境功能材料与器件重点试验室_期刊论文

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作者单位: Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Key Lab Funct Mat & Devices Special Environm, Lab Environm Sci & Technol, Urumqi 830011, Peoples R China;Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

Recommended Citation:
Chen, S ,Li, YX ,Wang, CY . Visible-light-driven photocatalytic H-2 evolution from aqueous suspensions of perylene diimide dye-sensitized Pt/TiO2 catalysts[J]. RSC ADVANCES,2015,5(21):15880-15885.
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