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首页> 外文期刊>RSC Advances >Microwave synthesis of a CoSe2/graphene-TiO2 heterostructure for improved hydrogen evolution from aqueous solutions in the presence of sacrificial agents
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Microwave synthesis of a CoSe2/graphene-TiO2 heterostructure for improved hydrogen evolution from aqueous solutions in the presence of sacrificial agents

机译：微波合成COSE2 / GRAPHENE-TiO2异质结构，用于改善牺牲剂存在下水溶液的氢逸出

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摘要

A heterogeneous material consisting of a tube type TiO2 was grown in the presence of a CoSe2/graphene hybrid, as a high-performance photocatalyst material, through a fast microwave-assisted technique. The prepared composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopic analysis, UV-vis absorbance spectra and UV-vis diffuse reflectance spectra (DRS) analysis. The hydrogen evolution rate for ternary composites was found to be markedly high compared to bare TiO2 and binary CoSe2/graphene composites. This extraordinary photocatalytic activity for hydrogen evolution arises from the positive synergistic effect between the CoSe2 and graphene components in our heterogeneous system. The optical properties were also found to be affected by the different weight% of graphene in the composites by observing their respective band gaps from the DRS spectra.
机译：通过快速微波辅助技术，在COSE2 /石墨烯杂交物的存在下生长由管型TiO 2组成的异质材料，作为高性能光催化剂材料。 通过X射线衍射（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM），拉曼光谱分析，UV-Vis吸收光谱和UV-VI扩散反射光谱（DRS）分析的制备的复合材料。 与裸TiO2和二元链烯2 /石墨烯复合材料相比，发现三元复合材料的氢进化率明显高。 这种用于氢化的非凡光催化活性来自我们的异构体系中的COSE2和石墨烯组分之间的正协同效应。 还发现光学性质通过观察来自DRS光谱的各自带间隙来受复合材料中的不同重量％的石墨烯的影响。

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  • 来源
    《RSC Advances》 |2015年第24期|共9页
  • 作者

    Ullah Kefayat; Lei Zhu; Ye Shu; Ali Asghar; Oh Won-Chun;

  • 作者单位

    Hanseo Univ Dept Adv Mat Sci &

    Engn Seosan 356706 Chungnam Do South Korea;

    Hanseo Univ Dept Adv Mat Sci &

    Engn Seosan 356706 Chungnam Do South Korea;

    Hanseo Univ Dept Adv Mat Sci &

    Engn Seosan 356706 Chungnam Do South Korea;

    Hanseo Univ Dept Adv Mat Sci &

    Engn Seosan 356706 Chungnam Do South Korea;

    Hanseo Univ Dept Adv Mat Sci &

    Engn Seosan 356706 Chungnam Do South Korea;

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  • 正文语种 eng
  • 中图分类 化学;
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