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首页> 外文期刊>RSC Advances >Enhanced visible-light-induced photocatalytic performance of a novel ternary semiconductor coupling system based on hybrid Zn-In mixed metal oxide/g-C3N4 composites
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Enhanced visible-light-induced photocatalytic performance of a novel ternary semiconductor coupling system based on hybrid Zn-In mixed metal oxide/g-C3N4 composites

机译：基于杂交Zn的混合金属氧化物/ G-C3N4复合材料，增强了新型三元半导体耦合系统的可见光诱导的光催化性能

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摘要

Hybrid composites of Zn-In mixed metal oxides (ZnIn-MMO) and g-C3N4 were synthesized by a facile thermal decomposition of Zn-In layered double hydroxide (ZnIn-LDH) and melamine mixture precursors. The structural and optical properties of the ZnIn-MMO/g-C3N4 composites were characterized by powder X-ray diffraction, transmission electron microscopy, UV-vis diffuse reflectance spectroscopy, X-ray photoelectron spectra, photoluminescence spectra, electron spin resonance and transient absorption spectra. The results indicated that ZnIn-MMO nanoparticles were well distributed over the surface of the g-C3N4 sheets formed in situ. Compared with pristine ZnIn-MMO, the assynthesized ZnIn-MMO/g-C3N4 nanohybrids showed stronger absorption in the visible light region. Furthermore, the ZnIn-MMO/g-C3N4 composite with a g-C3N4 amount of 36 wt% exhibited significantly enhanced photodegradation activity for Rhodamine B under visible light irradiation, in comparison with pure g-C3N4 and ZnIn-MMO, which was attributable to the unique heterostructure of the ternary semiconductor coupling system composed of g-C3N4, In2O3 and ZnO in the composites, facilitating efficient transportation and separation of the photogenerated electron-hole pairs and thus the continuous generation of reactive oxygen species. The present finding provides a simple approach for fabricating new types of visible-light-induced g-C3N4-based semiconductor composite photocatalysts for pollutant degradation in advanced oxidation processes.
机译：日宁的混合金属氧化物（日宁-MMO）和g-C3N4的混杂复合材料是由日宁的容易热分解合成层状双氢氧化物（日宁-LDH）和三聚氰胺混合物的前体。该日宁-MMO /克 - C3N4复合材料的结构和光学性质通过粉末X射线衍射，透射电子显微镜，紫外可见漫反射光谱，X射线光电子光谱，光致发光光谱，电子自旋共振和瞬态吸收光谱。结果表明，日宁-MMO纳米粒子良好地分散在原位形成的g C3N4片材的表面上。与原始的日宁-MMO相比，assynthesized日宁-MMO /克 - C3N4纳米复合物显示出在可见光区较强的吸收。此外，日宁-MMO /克C3N4复合与罗丹明B可见光照射下36％（重量）展出显著提高光降解活性的G-C3N4量，在具有纯G-C3N4和日宁-MMO比较，这是由于在复合材料的G-C3N4，氧化铟和氧化锌构成的三元半导体耦合系统，有利于高效率的运输和光生电子 - 空穴对分离，从而不断产生活性氧物质的独特异质结构。本发现提供了用于高级氧化处理污染物降解的制造的新类型的可见光诱导的基于G-C3N4-半导体复合光催化剂的一种简单的方法。

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  • 来源
    《RSC Advances》 |2015年第8期|共10页
  • 作者

    Lan Meng; Fan Guoli; Yang Lan; Li Feng;

  • 作者单位

    Beijing Univ Chem Technol State Key Lab Chem Resource Engn Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol State Key Lab Chem Resource Engn Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol State Key Lab Chem Resource Engn Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol State Key Lab Chem Resource Engn Beijing 100029 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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