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首页> 外文期刊>Journal of Hazardous Materials >Molybdenum sulfide-modified metal-free graphitic carbon nitride/black phosphorus photocatalyst synthesized via high-energy ball-milling for efficient hydrogen evolution and hexavalent chromium reduction
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Molybdenum sulfide-modified metal-free graphitic carbon nitride/black phosphorus photocatalyst synthesized via high-energy ball-milling for efficient hydrogen evolution and hexavalent chromium reduction

机译：通过高能球磨合成的钼硫化物改性的无金属石墨氮化物/黑色磷光催化剂，以获得高效的氢气进化和六价铬还原

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摘要

Improving the photocatalytic property of metal-free photocatalyst is still a challenging work. Herein, a novel high-efficiency molybdenum sulfide (MoS2)-modified metal-free graphitic carbon nitride (g-C3N4)/black phosphorus (BP) photocatalyst (MCN/BP/MS) was synthesized on a large scale via high-energy ball milling process. The optimized MCN/BP/MS exhibits the excellent hydrogen evolution rate of 2146.8 mu mol.g(-1).h(-1), and hexavalent chromium (Cr(VI)) reduction activity with an apparent rate constant of 0.1464 min(-1) and a degradation rate of 100% in 25 min. Detailed characterizations and mechanism research verified that the significantly improved photocatalytic activity of MCN/BP/MS mainly profited from the matched band structure, enhanced light absorption, intense interface contact, as well as the type-I/Z hybrid charge transfer mechanism, which gave rise to a consecutive multistep charge migration, thus the photocarriers transfer and separation can be greatly promoted, and the photogenerated electrons with high reducing capacity can be preserved. This work not only provides a high-efficiency g-C3N4-based noble-metal-free photocatalyst, but also affords a beneficial inspiration for improving the photocatalytic property of the metal free photocatalyst.
机译：改善无金属光催化剂的光催化性能仍然是一个具有挑战性的工作。在此，通过高能量球在大规模上合成了一种新型高效钼硫化物（MOS2）硫化物（MOS2）制型无金属 - 无金属石墨氮化物（G-C3N4）/黑磷（BP）光催化剂（MCN / BP / MS）铣削过程。优化的MCN / BP / MS表现出2146.8μmmol.g（-1）.h（-1）和六价铬（Cr（vi））还原活性的优异氢进化率，表观速率常数为0.1464 min（ -1）和25分钟内降解率为100％。详细表征和机制研究证实，MCN / BP / MS的显着改善的光催化活性主要来自匹配带结构，增强的光吸收，强烈的界面接触以及所提供的I / Z混合电荷转移机制。升至连续的多步电荷迁移，从而可以大大促进光载体转移和分离，并且可以保留高降低容量的光静电电子。这项工作不仅提供了一种高效的G-C3N4的无贵金属光催化剂，而且还提供了有益的灵感，用于改善金属自由光催化剂的光催化性能。

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  • 来源
    《Journal of Hazardous Materials》 |2021年第5期|125400.1-125400.13|共13页
  • 作者

    Meng Alan; Tian Wenli; Yang Hui; Wang Xianghu; Wang Xuehua; Li Zhenjiang;

  • 作者单位

    Qingdao Univ Sci & Technol MOE Coll Chem & Mol Engn Key Lab Opt Elect Sensing & Analyt Chem Life Sci Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci & Technol MOE Coll Chem & Mol Engn Key Lab Opt Elect Sensing & Analyt Chem Life Sci Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci & Technol MOE Coll Chem & Mol Engn Key Lab Opt Elect Sensing & Analyt Chem Life Sci Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci & Technol MOE Coll Chem & Mol Engn Key Lab Opt Elect Sensing & Analyt Chem Life Sci Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci & Technol Coll Mat Sci & Engn Qingdao 266042 Shandong Peoples R China;

    Qingdao Univ Sci & Technol Coll Mat Sci & Engn Qingdao 266042 Shandong Peoples R China|Qingdao Univ Sci & Technol Coll Sinp German Sci & Technol Qingdao 266061 Shandong Peoples R 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);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    G C3N4; BP; MoS2; Photocatalytic activity; Charge transfer mechanism;

    机译：G C3N4;BP;MOS2;光催化活动;电荷转移机制;

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