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首页> 外文期刊>ChemPlusChem >Nickel‐Doped Porous ZnO Nanosheets Functionalized with CuInS 2 2 Nanoparticles: An Efficient Photocatalyst for Chromium (VI) Reduction
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Nickel‐Doped Porous ZnO Nanosheets Functionalized with CuInS 2 2 Nanoparticles: An Efficient Photocatalyst for Chromium (VI) Reduction

机译：用CuIns 2 2纳米颗粒官能化的镍掺杂的多孔ZnO纳米片：减少铬（VI）的有效光催化剂

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摘要

Abstract Heterojunction nanocomposites comprising Nickel‐doped porous ZnO nanosheets decorated with CuInS 2 nanoparticles (CuInS 2 /Ni?ZnO) were prepared through a facile two‐step process. Compared with pure ZnO nanosheets, the Ni doping modifies the energy band structure and narrows the bandgap from 3.1?eV to 2.4?eV, thus enhancing the absorption of visible light. The production of high‐quality CuInS 2 /Ni?ZnO nanosheets with well‐matched band energy alignment facilitates effective charge transportation and separation. Benefiting from these favorable properties, the as‐prepared CuInS 2 /Ni?ZnO heterojunction nanosheets exhibit higher photocatalytic activity for reduction of Cr (VI) than CuInS 2 and Ni?ZnO in the presence of visible light. The CuInS 2 /Ni?ZnO‐5 (2?% Ni) composite shows the best photocatalytic activity, which is 7.2 and 5.4 times higher than that of the Ni?ZnO and CuInS 2 . 98?% of Cr (VI) (50?mg/L) can be reduced within 25?min. Moreover, the activity and structure of the CuInS 2 /Ni?ZnO catalyst are maintained after five cycles. Combining theoretical calculations and experimental results, a possible photocatalysis mechanism of the CuInS 2 /Ni?ZnO heterojunction nanocomposites is proposed.
机译：抽象的异质结纳米复合材料包含用CuIns 2纳米颗粒（CuIns 2 / NiβZnO）装饰的镍掺杂的多孔ZnO纳米片（CuIns 2 / NiβZnO）制备。与纯ZnO纳米片相比，NI掺杂改变了能带结构并从3.1°EEV缩小到2.4 ev，从而增强了可见光的吸收。具有良好匹配带能量对准的高质量CuIns 2 / Ni的生产有助于有效的电荷运输和分离。从这些有利的性质中受益，AS制备的CuIns 2 / Ni？ZnO异质结纳米片表现出较高的光催化活性，用于在可见光存在下比CUINS 2和NiγZnO还原Cr（VI）。 CuIns 2 / Ni？ZnO-5（2→％Ni）复合材料显示出最佳的光催化活性，其比NiγZnO和CuIns 2高7.2和5.4倍。 98？％Cr（VI）（50×mg / L）在25℃内可以减少。此外，在五个循环后，CuIns 2 / NiαZnO催化剂的活性和结构保持。组合理论计算和实验结果，提出了CuIns 2 / NiαZnO异质结纳米复合材料的可能光催化机理。

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  • 来源
    《ChemPlusChem》 |2020年第1期|共9页
  • 作者

    Gu Shuo; Zhao Xiaoli; Zhou Xiaoyu; Xie Fazhi; Wang Xiufang; Tang Zhi;

  • 作者单位

    School of Materials and Chemical EngineeringAnhui Jianzhu UniversityHefei Anhui 230601 P. R. China;

    State Key Laboratory of Environmental Criteria and Risk AssessmentChinese Research Academy of;

    School of Materials and Chemical EngineeringAnhui Jianzhu UniversityHefei Anhui 230601 P. R. China;

    School of Materials and Chemical EngineeringAnhui Jianzhu UniversityHefei Anhui 230601 P. R. China;

    School of Materials and Chemical EngineeringAnhui Jianzhu UniversityHefei Anhui 230601 P. R. China;

    State Key Laboratory of Environmental Criteria and Risk AssessmentChinese Research Academy of;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

    Chromium; doping; CuInS 2; nanostructures; photocatalysis;

    机译：铬;掺杂;CUINS 2;纳米结构;光催化;

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