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Facile synthesis and enhanced visible-light photoactivity of a g-C3N4/mullite composite

机译：容易合成和增强G-C3N4 /莫来石复合材料的可见光光接收

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摘要

A novel g-C3N4/mullite composite with enhanced visible light-driven photoactivity was prepared through a facile wetting chemical method. The microstructure, interfacial and optical properties of the obtained g-C3N4/mullite composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), surface area measurement (BET), and UV-visible diffused reflectance spectroscopy (UV-vis DRS), respectively. It is indicated that a tight interfacial combination was formed between g-C3N4 and mullite, which is beneficial for the transfer of electrons and the enhancement of quantum efficiency. Compared with pure g-C3N4 or a g-C3N4 + mullite physical mixture, the synthesized g-C3N4/mullite composites exhibit significantly enhanced photoactivity under visible light irradiation, almost 6.5 times that of the pure g-C3N4 and around 10.0 times that of a g-C3N4 + mullite physical mixture for the degradation of tetracycline. The enhanced photoactivity of the g-C3N4/mullite composite could be attributed not only to its stronger visible light adsorption and enhanced adsorption capacity for pollutants but also to the strong interfacial combination between g-C3N4 and mullite, effectively reducing the recombination probability of photogenerated electron-hole pairs.
机译：通过容易的润湿化学方法制备具有增强的可见光光接触的新型G-C3N4 /莫来石体复合材料。通过X射线衍射（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM），傅里叶变换红外光谱（FTIR），表征了所得G-C3N4 /莫来石复合材料的微观结构，界面和光学性质。区域测量（BET）和UV可见光散射反射光谱（UV-VIS DRS）。结果表明，在G-C3N4和莫来石之间形成了紧密的界面组合，这对于电子传递和量子效率的增强是有益的。与纯G-C3N4或G-C3N4 +莫来石物理混合物相比，合成的G-C3N4 /莫来石二酯复合材料表现出明显增强的可见光照射下的可光度，纯G-C3N4的近6.5倍，约为10.0倍。 G-C3N4 +莫来石体物理混合物用于四环素的降解。 G-C3N4 /莫来石体复合材料的增强光度不仅可以归因于其较强的可见光吸附和增强污染物的吸附能力，而且归因于G-C3N4和莫来石的强界面组合，有效地降低了光生电子的重组概率 - 井对。

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  • 来源
    《RSC Advances》 |2016年第93期|共10页
  • 作者

    Li Chunquan; Sun Zhiming; Liu Lixin; Huang Weixin; Zheng Shuilin;

  • 作者单位

    China Univ Min &

    Technol Beijing Sch Chem &

    Environm Engn Beijing 100083 Peoples R China;

    China Univ Min &

    Technol Beijing Sch Chem &

    Environm Engn Beijing 100083 Peoples R China;

    China Univ Min &

    Technol Beijing Sch Chem &

    Environm Engn Beijing 100083 Peoples R China;

    China Univ Min &

    Technol Beijing Sch Chem &

    Environm Engn Beijing 100083 Peoples R China;

    China Univ Min &

    Technol Beijing Sch Chem &

    Environm Engn Beijing 100083 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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