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Enhancement of visible-light-driven photocatalytic H-2 evolution from water over g-C3N4 through combination with perylene diimide aggregates
Shuai Chen; Chen Wang; Benjamin R. Bunesc; Yingxuan Li; Chuanyi Wanga; Ling Zangc
2015
发表期刊Applied Catalysis A: General
卷号498期号:5页码:63–68
摘要Graphitic carbon nitride (g-C3N4) is among the most promising metal-free photocatalysts for H2 production from solar-driven water reduction. However, the photocatalytic efficiency of bulk g-C3N4 powders is limited. In this work, molecular aggregates of perylene tetracarboxylic diimides (PTCDIs, a robust class of air-stable n-type organic semiconductor) were loaded via solution processing on the surface of g-C3N4, which is pre-deposited with cocatalyst Pt nanoparticles. The PTCDIs/Pt/g-C3N4 composites thus fabricated exhibit broader visible-light response than Pt/g-C3N4, and possess excellent photochemical stability. The initial intramolecular charge transfer features of the PTCDIs, as well as their energy levels being matched to g-C3N4, ensure subsequent charge separation in the PTCDIs/Pt/g-C3N4 composites. When the composites are dispersed into aqueous solutions containing triethanolamine as a sacrificial electron donor, a tenfold enhancement of H2 evolution activity (∼0.375 μmol h−1) is achieved compared to bare Pt/g-C3N4 under visible-light (λ ≥ 420 nm) irradiation.
关键词Photocatalysis Water-splitting Hydrogen G-c3n4 Perylene Diimide
DOI10.1016/j.apcata.2015.03.026
收录类别SCI
WOS记录号WOS:000355354600007
引用统计
文献类型期刊论文
条目标识符http://ir.xjipc.cas.cn/handle/365002/4226
专题环境科学与技术研究室
作者单位Chinese Acad Sci, Key Lab Funct Mat & Devices Special Environm, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Urumqi 830011, Peoples R China;Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China;Univ Utah, Nano Inst Utah, Salt Lake City, UT 84112 USA;Univ Utah, Dept Mat Sci & Engn, Salt Lake City, UT 84112 USA
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Shuai Chen,Chen Wang,Benjamin R. Bunesc,et al. Enhancement of visible-light-driven photocatalytic H-2 evolution from water over g-C3N4 through combination with perylene diimide aggregates[J]. Applied Catalysis A: General,2015,498(5):63–68.
APA Shuai Chen,Chen Wang,Benjamin R. Bunesc,Yingxuan Li,Chuanyi Wanga,&Ling Zangc.(2015).Enhancement of visible-light-driven photocatalytic H-2 evolution from water over g-C3N4 through combination with perylene diimide aggregates.Applied Catalysis A: General,498(5),63–68.
MLA Shuai Chen,et al."Enhancement of visible-light-driven photocatalytic H-2 evolution from water over g-C3N4 through combination with perylene diimide aggregates".Applied Catalysis A: General 498.5(2015):63–68.
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