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首页> 外文期刊>Journal of Colloid and Interface Science >Investigation of photocatalytic activities over ZnO-TiO_2-reduced graphene oxide composites synthesized via microwave-assisted reaction
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Investigation of photocatalytic activities over ZnO-TiO_2-reduced graphene oxide composites synthesized via microwave-assisted reaction

机译：微波辅助反应合成ZnO-TiO_2还原氧化石墨烯复合材料的光催化活性研究

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摘要

ZnO-TiO_2-reduced graphene oxide (RGO) composites were successfully synthesized by microwave-assisted reduction of graphite oxide in ZnO precursor solution with TiO_2 suspension using a microwave synthesis system. Their morphology, structure, and photocatalytic performance in the reduction of Cr(VI) were characterized by scanning electron microscopy, X-ray diffraction spectroscopy, and UV-vis absorption spectrophotometer. The results show that ZnO-TiO_2-RGO composites exhibit an enhanced photocatalytic performance in reduction of Cr(VI) with a maximum removal rate of 99.4% under UV light irradiation as compared with pure ZnO (58%) and ZnO-RGO (98%) composites due to the increased light absorption intensity and the reduction of electron-hole pair recombination in ZnO with the introduction of TiO_2.
机译：采用微波合成系统，以TiO_2为悬浮液，通过微波辅助还原ZnO前驱体溶液中的氧化石墨，成功合成了ZnO-TiO_2还原的氧化石墨烯（RGO）复合材料。通过扫描电子显微镜，X射线衍射光谱和紫外可见吸收分光光度计表征了它们的形态，结构和在还原Cr（VI）中的光催化性能。结果表明，与纯ZnO（58％）和ZnO-RGO（98％）相比，ZnO-TiO_2-RGO复合材料在紫外光照射下对Cr（VI）的还原具有增强的光催化性能，最大去除率为99.4％。 ）是由于TiO_2的引入增加了ZnO中的光吸收强度并减少了电子-空穴对的重组。

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