新型结构介孔SiO2和ZrO2-GO纳米复合材料在可见光照射下光催化降解有毒酚类衍生物,Surfaces and Interfaces

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新型结构介孔SiO2和ZrO2-GO纳米复合材料在可见光照射下光催化降解有毒酚类衍生物
Surfaces and Interfaces ( IF 5.7 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.surfin.2020.100613
Jingjing Zhao , Zambaga Otgonbayar , Kamrun Nahar Fatema , Suresh Sagadevan , Won-Chun Oh

摘要本研究采用自组装技术合成了新型介孔三元 ZrO2-GO-SiO2 复合材料，并通过物理特性设备，利用 XRD、SEM、TEM、拉曼、XPS、DRS、BET 和 PL技术。TEM 图像显示介孔结构的半导体和过渡金属氧化物均匀分布在氧化石墨烯的外部。ZrO2 的平均粒径和球形 SiO2 的直径分别为（55.04 和 280.21）nm。ZrO2-GO、GO-SiO2 和三元 ZrO2-GO-SiO2 纳米复合材料的带隙分别为 (4.13、4.17 和 4.21)eV，通过 UV-vis DRS 方法进行分析。在可见光照射下测定了所制备的二元和三元复合材料的光催化活性。SiO2 的球形介孔结构可以提高催化剂的吸附性能。此外，石墨烯增加了催化剂材料的活性位点的体积，从而增强了染料材料与光催化剂之间的相互作用。这项工作揭示了染料吸附/还原与催化剂之间的关系，为提高光催化性能提供了基本指导。

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Novel-structured Mesoporous SiO2 and ZrO2 -GO Nanocomposite for Photocatalytic Degradation of Toxic Phenolic Derivatives under the Visible Light Irradiation

Abstract In this study, the new mesoporous ternary ZrO2–GO–SiO2 composite was synthesized by self-assembly technique, and progressively analyzed through physical characteristic equipment, by use of XRD, SEM, TEM, Raman, XPS, DRS, BET, and PL techniques. The TEM images showed the mesoporous structured semiconductor and transition metal oxide uniformly spread on the exterior of graphene oxide. The average particle size of ZrO2 and the diameter of the spherical SiO2 was (55.04 and 280.21) nm, respectively. The bandgap of ZrO2–GO, GO–SiO2, and the ternary ZrO2–GO–SiO2 nanocomposites were (4.13, 4.17, and 4.21)eV, respectively, which was analyzed through the UV–vis DRS method. The photocatalytic activity of the as-prepared binary and ternary composites were determined under the vis-light irradiation. The spherical mesoporous structure of SiO2 can boost the adsorption property of catalyst. In addition, the graphene increases the volume of active sites of catalyst material which enhanced the interaction between dye-material and photocatalyst. This work unearths into the relation between Dye adsorption/reduction and catalyst, providing fundamental guidance to improve photocatalytic performance.

更新日期：2020-09-01

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