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Structure based optical properties and catalytic activities of hydrothermally prepared CuS nanostructures

机译：基于结构的光学性能和水热制备的CUS纳米结构的催化活性

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摘要

The nano-sized copper sulfides (CuS) with different morphologies were prepared by hydrothermal method without any surfactant or template. The morphology and structure of CuS were characterized by powder x-ray diffraction (XRD), Fourier transform infrared spectroscopy, x-ray photoelectron spectra (XPS), field emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), Bmnauer-Emmett-Teller (BET) and ultraviolet-visible (UV-vis) absorption spectroscopy. FESEM results show that four morphologies of CuS (flower-like nanospheres, cross-linked nanodisks, cross-linked nanoplates and nanosheets) were prepared simply by changing the hydrothermal solvent. According to the XPS, XRD and HR ELM results the synthesized nano-sized structures are highly crystallized pure hexagonal covellite CuS. UV-vis spectra results show intense absorption peaks in the visible region, confirming that the resultant CuS has potential application in the field of solar cells. The catalytic activities of resultant CuS on model pollutant methylene blue (MB) in the dark were also investigated in detail. The small and flat crystallites show rapid degradation rate on MB, which is attributed to the numerous active sites on their large specific surface area. The as-synthesized CuS nanosheets took the shortest time (only 15 min) to degrade MB completely compared with the other nanostructural CuS in this work as well as previously reported ones. Total organic carbon removal of the samples approved mineralization of the MB pollutant. Thus, CuS is an excellent catalyst for degrading organic pollutants, which does not require light energy for its catalytic activities.
机译：通过没有任何表面活性剂或模板的水热方法制备具有不同形态的纳米硫化铜（CU）。 CUS的形态和结构是通过粉末X射线衍射（XRD），傅里叶变换红外光谱，X射线光电子体光谱（XPS），场发射扫描电子显微镜（FESEM），高分辨率透射电子显微镜（HRTEM）。 ，Bmnauer-Emmett-keter（Bet）和紫外线可见（UV-VIS）吸收光谱。 FeSEM结果表明，通过改变水热溶剂，制备了四种CUS（花样纳米球，交联纳米管，交联纳米层，交联纳米层，交联纳米片和纳米片）。根据XPS，XRD和HR ELM结果，合成的纳米尺寸结构是高度结晶的纯六边形钴CU。 UV-VIS光谱结果显示出可见区域中的浓度吸收峰，证实得到的CU在太阳能电池领域具有潜在的应用。还详细研究了在黑暗中产生的模型污染物亚甲基蓝（MB）上所得CUS的催化活性。小型和扁平的微晶显示出Mb的快速降解速率，其归因于其大的比表面积上的许多活性位点。和综合的CUS纳米片占据了最短的时间（仅15分钟），与此工作中的其他纳米结构CU相比，将MB与此工作中的其他纳米结构CU相比，以及先前报告的。总有机碳去除样品批准MB污染物的矿化。因此，CU是用于降解有机污染物的优异催化剂，其不需要光能的催化活性。

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  • 来源
    《Nanotechnology》 |2019年第10期|共15页
  • 作者

    Mezgebe Mebrahtu Melake; Ju Anqi; Wei Gang; Macharia Daniel K.; Guang Shanyi; Xu Hongyao;

  • 作者单位

    Donghua Univ State Key Lab Modificat Chem Fibers &

    Polymers Ma Coll Mat Sci &

    Engn Shanghai 201620 Peoples R China;

    Donghua Univ State Key Lab Modificat Chem Fibers &

    Polymers Ma Coll Mat Sci &

    Engn Shanghai 201620 Peoples R China;

    Donghua Univ State Key Lab Modificat Chem Fibers &

    Polymers Ma Coll Mat Sci &

    Engn Shanghai 201620 Peoples R China;

    Donghua Univ State Key Lab Modificat Chem Fibers &

    Polymers Ma Coll Mat Sci &

    Engn Shanghai 201620 Peoples R China;

    Donghua Univ Coll Chem &

    Bioengn Shanghai 201620 Peoples R China;

    Donghua Univ State Key Lab Modificat Chem Fibers &

    Polymers Ma Coll Mat Sci &

    Engn Shanghai 201620 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    semiconductors; nanostructures; copper sulfide; optical property; catalytic activity;

    机译：半导体;纳米结构;硫化铜;光学性质;催化活性;

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