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首页> 外文期刊>Advanced energy materials >Bandgap Engineering of Organic Semiconductors for Highly Efficient Photocatalytic Water Splitting
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Bandgap Engineering of Organic Semiconductors for Highly Efficient Photocatalytic Water Splitting

机译：用于高效光催化水分解的有机半导体带隙工程

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摘要

The bandgap engineering of semiconductors, in particular low-cost organic/polymeric photocatalysts could directly influence their behavior in visible photon harvesting. However, an effective and rational pathway to stepwise change of the bandgap of an organic/polymeric photocatalyst is still very challenging. An efficient strategy is demonstrated to tailor the bandgap from 2.7 eV to 1.9 eV of organic photocatalysts by carefully manipulating the linker/terminal atoms in the chains via innovatively designed polymerization. These polymers work in a stable and efficient manner for both H-2 and O-2 evolution at ambient conditions (420 nm lambda 710 nm), exhibiting up to 18 times higher hydrogen evolution rate (HER) than a reference photocatalyst g-C3N4 and leading to high apparent quantum yields (AQYs) of 8.6%/2.5% at 420/500 nm, respectively. For the oxygen evolution rate (OER), the optimal polymer shows 19 times higher activity compared to g-C3N4 with excellent AQYs of 4.3%/1.0% at 420/500 nm. Both theoretical modeling and spectroscopic results indicate that such remarkable enhancement is due to the increased light harvesting and improved charge separation. This strategy thus paves a novel avenue to fabricate highly efficient organic/polymeric photocatalysts with precisely tunable operation windows and enhanced charge separation.
机译：半导体（特别是低成本的有机/聚合物光催化剂）的带隙工程可以直接影响其在可见光子收集中的行为。然而，逐步改变有机/聚合物光催化剂的带隙的有效且合理的途径仍然非常具有挑战性。通过创新设计的聚合反应，通过小心地操纵链中的连接子/末端原子，证明了一种有效的策略可将带隙从2.7 eV调整为1.9 eV的有机光催化剂。这些聚合物在环境条件下（420 nm

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  • 来源
    《Advanced energy materials》 |2018年第24期|1801084.1-1801084.10|共10页
  • 作者

    Wang Yiou; Silveri Fabrizio; Bayazit Mustafa K.; Ruan Qiushi; Li Yaomin; Xie Jijia; Catlow C. Richard A.; Tang Junwang;

  • 作者单位

    UCL, Dept Chem Engn, Solar Energy & Adv Mat Grp, Torrington Pl, London WC1E 7JE, England;

    Univ Cardiff, Sch Chem, Pk Pl, Cardiff CF10 3AT, S Glam, Wales;

    UCL, Dept Chem Engn, Solar Energy & Adv Mat Grp, Torrington Pl, London WC1E 7JE, England;

    UCL, Dept Chem Engn, Solar Energy & Adv Mat Grp, Torrington Pl, London WC1E 7JE, England;

    UCL, Dept Chem Engn, Solar Energy & Adv Mat Grp, Torrington Pl, London WC1E 7JE, England;

    UCL, Dept Chem Engn, Solar Energy & Adv Mat Grp, Torrington Pl, London WC1E 7JE, England;

    Univ Cardiff, Sch Chem, Pk Pl, Cardiff CF10 3AT, S Glam, Wales;

    UCL, Dept Chem Engn, Solar Energy & Adv Mat Grp, Torrington Pl, London WC1E 7JE, England;

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  • 正文语种 eng
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  • 关键词

    bandgap; organic semiconductors; photocatalytic; polymers; water splitting;

    机译：带隙;有机半导体;光催化;聚合物;水分解;

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