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首页> 外文期刊>Journal of Materials Research >Stable core-shell ZIF-8@ZIF-67 MOFs photocatalyst for highly efficient degradation of organic pollutant and hydrogen evolution
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Stable core-shell ZIF-8@ZIF-67 MOFs photocatalyst for highly efficient degradation of organic pollutant and hydrogen evolution

机译：稳定的核心 - 壳ZIF-8 @ ZIF-67 MOFS光催化剂，用于高效降解有机污染物和氢气进化

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摘要

Compared to single metal-organic framework (MOF), core-shell MOF crystals are more promising due to their special structure and unique properties. Herein, since ZIF-8 and ZIF-67 have the same topology, crystal growth method is used to synthesize core-shell crystals ZIF-8@ZIF-67, which exhibit far superior light adsorption, charge separation capabilities, and excellent stability than ZIF-8 and ZIF-67. The photocatalytic H_2 generation rate for ZIF-8@ZIF-67 (1∶1) is about 17 times higher than that of pure ZIF-67 without cocatalyst loading under same reaction conditions. Through a series of characterizations, two connection modes between ZIF-8 and ZIF-67 frames in core-shell contact interface are proposed, and the corresponding photocatalytic mechanism is elucidated. Transient photovoltaic curve reveals the unique transfer paths of electrons through contact interface, which leads to efficient charge separation compared with other ZIF materials. This study provides a novel and simple strategy to synthesis high effective and stable core-shell ZIF photocatalyst for photodegradation and hydrogen evolution.
机译：相比于单金属 - 有机骨架（MOF），核 - 壳MOF晶体是由于其特殊的结构和独特的性质更有前途。在此，由于ZIF-8和ZIF-67具有相同的拓扑结构，晶体生长方法用于合成芯 - 壳晶体ZIF-8 @ ZIF-67，其表现出远远优于光吸收，电荷分离能力，并且比ZIF优异的稳定性-8和ZIF-67。光催化H_2生成速率为ZIF-8 @ ZIF-67（1点01分）比纯的ZIF-67的高约17倍，而不相同反应条件下的助催化剂负载。通过一系列的特征中的，ZIF-8和之间的两个连接模式ZIF-67在芯 - 壳接触接口帧被提出，并且相应的光催化机理进行说明。瞬态光伏曲线揭示了通过接触界面电子，这导致有效的电荷分离与其它ZIF材料相比的独特的传送路径。本研究提供了一种新的和简单的策略来合成高有效且稳定的核 - 壳ZIF光催化剂为光降解和析氢。

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  • 来源
    《Journal of Materials Research》 |2021年第3期|602-614|共13页
  • 作者

    Zheao Huang; Jianqing Zhou; Yingying Zhao; Hengbin Cheng; Gongxuan Lu; A. W. Morawski; Ying Yu;

  • 作者单位

    Institute of Nanoscience and Nanotechnology College of Physical Science and Technology Central China Normal University Wuhan 430079 People's Republic of China;

    Institute of Nanoscience and Nanotechnology College of Physical Science and Technology Central China Normal University Wuhan 430079 People's Republic of China;

    Institute of Nanoscience and Nanotechnology College of Physical Science and Technology Central China Normal University Wuhan 430079 People's Republic of China;

    Institute of Nanoscience and Nanotechnology College of Physical Science and Technology Central China Normal University Wuhan 430079 People's Republic of China;

    State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 People's Republic of China;

    Department of Inorganic Chemical Technology and Environment Engineering West Pomeranian University of Technology ul. Pulaskiego 10 70-322 Szczecin Poland;

    Institute of Nanoscience and Nanotechnology College of Physical Science and Technology Central China Normal University Wuhan 430079 People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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