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首页> 外文期刊>Advanced Functional Materials >In Situ Formation of Bismuth-Based Perovskite Heterostructures for High-Performance Cocatalyst-Free Photocatalytic Hydrogen Evolution
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In Situ Formation of Bismuth-Based Perovskite Heterostructures for High-Performance Cocatalyst-Free Photocatalytic Hydrogen Evolution

机译：原位形成基于铋的钙钛矿异质结构，用于高性能助催化剂的无催化氢气进化

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摘要

Solar-to-fuel conversion with organic-inorganic hybrid halide perovskites has attracted growing attention as a result of their excellent optoelectronic properties as well as the low temperature of the solution based fabrication process. However, the most comprehensively developed hybrid perovskite materials are comprised of the toxic metal lead, raising concerns about environmental health threats. Herein, a lead-free bismuth (Bi)-based hybrid perovskite showing in situ growth of heterojunctions is successfully developed at the interface of methylammonium bismuth iodide (MA(3)Bi(2)I(9)) and tri(dimethylammonium) hexa-iodobismuthate (DMA(3)BiI(6)) by a facile solvent engineering technique. The air-stable MA(3)Bi(2)I(9)/DMA(3)BiI(6)perovskite heterostructure with enhanced photoinduced charge separation exhibit outstanding visible-light-induced photocatalytic activity for H(2)evolution in aqueous hydrogen iodide solution. The powdered MA(3)Bi(2)I(9)/DMA(3)BiI(6)heterostructured composite (BBP-5) shows a H(2)evolution rate of 198.2 mu mol h(-1)g(-1)without the addition of Pt co-catalysts under 100 mW cm(-2)of visible-light (lambda = 420 nm) illumination.
机译：由于其优异的光电性能以及基于溶液的制造工艺的低温，具有有机无机杂交卤化物的太阳能 - 无机杂交卤化物钙锌矿引起了不断的关注。然而，最全面的杂交钙钛矿材料由毒性金属铅组成，提高了对环境健康威胁的担忧。在此，在甲基铋碘化物（MA（3）Bi（2）I（9））和三（二甲基铵）六征的界面，在杂交型杂交液（Bi）的杂交钙钛矿上显示出异质结的杂交钙钛矿。 - 碘ismuthate（DMA（3）BII（6））通过容易溶剂工程技术。空气稳定MA（3）BI（2）I（9）I（9）/ DMA（3）BII（6）钙钛矿异质结构，具有增强的光致电荷分离，其在氢气水溶液中表现出H（2）进化的突出的可见光诱导的光催化活性碘化物溶液。粉末MA（3）BI（2）I（9）/ DMA（3）BII（6）异质化复合材料（BBP-5）显示198.2μmolH（-1）g（ - 1）在不在100mW cm（-2）的可见光（Lambda> = 420nm）照明下的Pt助催化剂的添加。

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  • 来源
    《Advanced Functional Materials》 |2020年第52期|2006919.1-2006919.9|共9页
  • 作者

    Tang Yunqi; Mak Chun Hong; Liu Rugeng; Wang Zuankai; Ji Li; Song Haisheng; Tan Chunyan; Barriere Frederic; Hsu Hsien-Yi;

  • 作者单位

    City Univ Hong Kong Sch Energy & Environm Kowloon Tong Hong Kong Peoples R China|City Univ Hong Kong Dept Mat Sci & Engn Kowloon Tong Hong Kong Peoples R China|City Univ Hong Kong Shenzhen Res Inst Shenzhen 518057 Peoples R China;

    City Univ Hong Kong Sch Energy & Environm Kowloon Tong Hong Kong Peoples R China|City Univ Hong Kong Dept Mat Sci & Engn Kowloon Tong Hong Kong Peoples R China|City Univ Hong Kong Shenzhen Res Inst Shenzhen 518057 Peoples R China;

    City Univ Hong Kong Sch Energy & Environm Kowloon Tong Hong Kong Peoples R China|City Univ Hong Kong Dept Mat Sci & Engn Kowloon Tong Hong Kong Peoples R China|City Univ Hong Kong Shenzhen Res Inst Shenzhen 518057 Peoples R China;

    City Univ Hong Kong Dept Mech Engn Hong Kong Peoples R China;

    Fudan Univ Sch Microelect State Key Lab ASIC & Syst Shanghai 200433 Peoples R China;

    City Univ Hong Kong Sch Energy & Environm Kowloon Tong Hong Kong Peoples R China|City Univ Hong Kong Dept Mat Sci & Engn Kowloon Tong Hong Kong Peoples R China|City Univ Hong Kong Shenzhen Res Inst Shenzhen 518057 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    co-catalyst-free; in situ formation; perovskite heterojunctions; photocatalytic hydrogen evolution;

    机译：无催化剂;原位形成;Perovskite杂交;光催化氢气进化;

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