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首页> 外文期刊>Applied Surface Science >Steering charge kinetics in metal-free g-C_3N_4/melem hybrid photocatalysts for highly efficient visible-light-driven hydrogen evolution
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Steering charge kinetics in metal-free g-C_3N_4/melem hybrid photocatalysts for highly efficient visible-light-driven hydrogen evolution

机译：无金属g-C_3N_4 / melem杂化光催化剂中的转向电荷动力学，用于高效可见光驱动的氢气释放

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摘要

The low efficiency of photogenerated charge separation is a critical factor to restrict the efficiency of photocatalytic reaction. Extensive research efforts have been devoted to charging kinetics to improve the efficiency of photogenerated charge separation and transfer to catalytic sites. In this research, the heterostructure and interfacial electron polarization are formed between melem and graphitic carbon nitride (g-C3N4) through first-principles calculation, which can greatly suppress the electron-hole recombination. The synergistic advantage of g-C3N4/melem hybrid reveals great enhancement in photocatalytic hydrogen activity. Subsequently, we prepared the composite material of g-C3N4/melem by molecular engineering strategy, and found that the photocatalytic efficiency of g-C3N4/melem was twice of pristine g-C3N4. This study provides an insightful idea to improve the efficiency of photogenerated charge separation.
机译：光生电荷分离的低效率是限制光催化反应效率的关键因素。已经进行了广泛的研究努力以提高动力学，以提高光生电荷分离和转移到催化部位的效率。通过第一性原理计算，在元素与石墨氮化碳（g-C3N4）之间形成了异质结构和界面电子极化，可以极大地抑制电子-空穴的复合。 g-C3N4 /蜜mel杂种的协同优势显示出光催化氢活性的极大提高。随后，通过分子工程策略制备了g-C3N4 /蜜em的复合材料，发现g-C3N4 /蜜em的光催化效率是原始g-C3N4的两倍。这项研究提供了一个有见地的想法，以提高光生电荷分离的效率。

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  • 来源
    《Applied Surface Science》 |2020年第30期|145345.1-145345.7|共7页
  • 作者

    Yang Dong; Li LeiLei; Xiao Gao; Zhang Sheng;

  • 作者单位

    Univ Sci & Technol China iChEM Collaborat Innovat Ctr Chem Energy Mat Hefei Natl Lab Phys Sci Microscale Hefei 230026 Anhui Peoples R China|Univ Sci & Technol China Sch Chem & Mat Sci Hefei 230026 Anhui Peoples R China;

    Univ Sci & Technol China Dept Modern Mech CAS Key Lab Mech Behav & Design Mat CAS Ctr Excellence Complex Syst Mech Hefei 230026 Anhui Peoples R China;

    Harvard Univ John A Paulson Sch Engn & Appl Sci Cambridge MA 02138 USA;

    Zhejiang Univ Ningbo Res Inst Ningbo 315100 Peoples R China|Tokai Univ Micro Nano Technol Ctr 4-1-1 Kitakaname Hiratsuka Kanagawa 2591292 Japan;

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  • 正文语种 eng
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  • 关键词

    Hybrid photocatalyst; Hydrogen evolution; Metal-free photocatalyst; C3N4;

    机译：杂化光催化剂;析氢无金属的光催化剂;C3N4;

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