片花状ZnO@碳球核壳结构的制备及太阳光催化性能

发布时间：2019-06-08 13:52

【摘要】：采用水热法合成具有核壳结构的片花状ZnO@碳球系列复合物(ZnO@C)。利用X射线衍射(XRD),扫描电子显微镜(SEM),X射线光电子能谱(XPS),红外光谱(FTIR),紫外可见漫反射光谱(UV-Vis DRS),荧光光谱(PL)以及N2吸附-脱附等技术对所合成样品进行表征,结果表明,碳球被ZnO纳米片包裹形成具有核壳结构的片花状复合物,碳球的存在增加了ZnO对可见光的吸收,有效抑制了光生电子空穴对的复合。在模拟太阳光下,对活性染料GR黑及甲硝唑的光催化降解测试结果显示,ZnO@C系列复合物的光催化性能均高于纯ZnO,其中ZnO@C-2样品表现出最好的光催化性能,其光催化降解GR黑和甲硝唑的速率分别为纯ZnO的4.2倍和2.1倍。
[Abstract]:Flake ZnO@ carbon sphere composites (ZnO@C) with core-shell structure were synthesized by hydrothermal method. X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), infrared spectrum (FTIR), ultraviolet visible diffuse reflection spectrum (UV-Vis DRS),) The synthesized samples were characterized by fluorescence spectrum (PL) and N2 adsorption-desorption techniques. The results showed that the carbon spheres were wrapped by ZnO nanoparticles to form flake flower complexes with core-shell structure, and the existence of carbon spheres increased the absorption of visible light by ZnO. The recombination of photogenerated electron hole pairs is effectively suppressed. The photocatalytic degradation of reactive dye GR black and metronidazole under simulated sunlight showed that the photocatalytic performance of ZnO@C series complexes was higher than that of pure ZnO, and ZnO@C-2 samples showed the best photocatalytic performance. The photocatalytic degradation rate of GR black and metronidazole was 4.2 times and 2.1 times higher than that of pure ZnO, respectively.
【作者单位】：河南师范大学环境学院黄淮水环境与污染防治教育部重点实验室河南省环境污染控制重点实验室环境功能材料与污染控制河南省工程实验室;河南师范大学化学化工学院;
【基金】：国家水体污染控制与治理科技重大专项(No.2015ZX07204-002) 河南省重点科技攻关项目(No.122102210233) 河南省基础与前沿技术研究计划项目(No.132300410286,152300410087) 河南省高等学校重点科研项目(No.16A150032)资助
【分类号】：O643.36

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