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首页> 外文期刊>Crystal growth & design >Large Conjugated Organic Cations Sensitized Hybrid Lead Halides as Visible Light Driven Photocatalysts
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Large Conjugated Organic Cations Sensitized Hybrid Lead Halides as Visible Light Driven Photocatalysts

机译：大型共轭有机阳离子敏化杂交铅卤化物作为可见光驱动的光催化剂

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摘要

Visible light driven photocatalysts based on crystalline metal halides received much less attention compared with dense or composite oxide semiconductors due to low photochemical stabilities. Here, by using large conjugated organic cations as structural direction agents, a series of hybrid cuprous and/or lead halides have been solvothermally prepared and structurally characterized. Compounds H[(Me)(3)-TPT](6)(Cu2I6)(3)(Pb6I19)center dot(H2O)(2) (1) and [(Me)(3)-TPT](2) Cu2Pb3Br14 (2; TPT = 2,4,6-tri(4-pyridyl)-1,3,5-triazine) contain uncommon Lindqvist-type [Pb6I19](7-) nanoclusters and heterometallic [Cu2Pb3Br14](6-) units, respectively. Compounds [H3TIB](2)Pb5Br16 (3) and H[(Me)(3)-TIB](2)Pb5I17 (4; TIB = 1,3,5-tris(1-imidazolyl)benzene) are composed of one-dimensional (ID) [Pb5Br16](6-) chains and two-dimensional (2D) [Pb5I17](7-) layers, respectively. The photosensitized conjugated organic cations offer a great contribution to the conduction bands, which lead to narrow band gaps of 2.01-2.35 eV. Under visible light irradiation, compound 4 exhibits efficient and stable photocatalytic degradation activity for various organic pollutants. The possible photocatalytic mechanism obtained from the radical trapping experiments and electronic band structural calculation show that conjugated organic cations effectively inhibit the recombination of photoinduced electron-hole pairs leading to excellent photocatalytic activity and photochemical stability.
机译：基于结晶金属卤化物的可见光驱动光催化剂与由于低光化学稳定性，与致密或复合氧化物半导体相比，较少的关注值得太少。这里，通过使用大缀合的有机阳离子作为结构方向剂，一系列杂化铜和/或卤化物在溶于热制备和结构表征。化合物H [（ME）（3）--TPT]（6）（Cu 2 5）（3）（3）（Pb6i19）中心点（H 2 O）（2）（1）和[（ME）（3） - TPT]（2）Cu2PB3BR14 （2; TPT = 2,4,6-三（4-吡啶基）-1,3,5-三嗪）含有罕见的Lindqvist型[Pb6i19]（7-）纳米蛋白和杂核[Cu2PB3BR14]（6-）单位，分别。化合物[H3TIB]（2）PB5BR16（3）和H [（ME）（3） - Tib]（2）Pb5i17（4; Tib = 1,3,5-三（1-咪唑基）苯）由一个组成 - 二维（ID）[PB5BR16]（6-）链和二维（2D）[PB5i17]（7-）层。光敏的共轭有机阳离子为导通带提供了极大的贡献，这导致窄带间隙为2.01-2.35eV。在可见光照射下，化合物4对各种有机污染物表现出高效且稳定的光催化降解活性。从自由基捕获实验和电子频带结构计算中获得的可能的光催化机制表明，共轭有机阳离子有效地抑制光致电子 - 孔对的重组，导致优异的光催化活性和光化学稳定性。

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  • 来源
    《Crystal growth & design》 |2019年第8期|共7页
  • 作者

    Yue Cheng-Yang; Zhao Hui-Fang; Jiang Hao; Guo Ya-Hui; Che Hang-Xin; Li Jing-Zhao; Chu Wen-Xin; Yuan Yun; Jing Zhi-Hong; Lei Xiao-Wu;

  • 作者单位

    Jining Univ Dept Chem &

    Chem Engn Qufu 273155 Shandong Peoples R China;

    Jining Univ Dept Chem &

    Chem Engn Qufu 273155 Shandong Peoples R China;

    Jining Univ Dept Chem &

    Chem Engn Qufu 273155 Shandong Peoples R China;

    Jining Univ Dept Chem &

    Chem Engn Qufu 273155 Shandong Peoples R China;

    Jining Univ Dept Chem &

    Chem Engn Qufu 273155 Shandong Peoples R China;

    Jining Univ Dept Chem &

    Chem Engn Qufu 273155 Shandong Peoples R China;

    Jining Univ Dept Chem &

    Chem Engn Qufu 273155 Shandong Peoples R China;

    Jining Univ Dept Chem &

    Chem Engn Qufu 273155 Shandong Peoples R China;

    Qufu Normal Univ Coll Chem &

    Chem Engn Qufu 273165 Shandong Peoples R China;

    Jining Univ Dept Chem &

    Chem Engn Qufu 273155 Shandong Peoples R China;

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  • 正文语种 eng
  • 中图分类 晶体学;
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