Shape-Controlled Synthesis of Coral-like ZnO/C-ZnFe2O4 Hierarchical Structures and Their Improved Photocatalytic Antibacterial Efficiency under Visible Light Illumination
Shape-Controlled Synthesis of Coral-like ZnO/C-ZnFe2O4 Hierarchical Structures and Their Improved Photocatalytic Antibacterial Efficiency under Visible Light Illumination
复制标题
形控合成珊瑚状ZnO/C-ZnFe2O4多级结构及其在可见光照射下提高光催化抗菌效率
DOI：
10.1021/acs.iecr.0c00939
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发表时间：
2020-06-17
影响因子：
4.2
通讯作者：
Zhang, Chun
中科院分区：
文献类型：
--
作者：
Gu, Yinan;Teng, Guixiang;Zhang, Chun
模拟珊瑚的结构特点，利用其有利于光的捕获和吸收的特点，合成了珊瑚状ZnO/C-ZnFe 2 O 4（Z/C-ZFO）光催化剂。合成过程包括两步过程。首先，采用水热自组装法合成了花状分级结构前驱体。接着，在用锌源掺杂后，在氮气氛中对前体进行热退火。除了形成异质结增强其光催化性能外，珊瑚状纳米结构赋予Z/C-ZFO显著的光捕获效率。最后，将该光催化剂用于对大肠杆菌和金黄色葡萄球菌的抗菌应用。结果表明，优化后的杀菌剂对大肠杆菌的杀菌效果最好。coli和革兰氏阳性菌S.金黄色葡萄球菌的检出率分别为99.4%和98.0%，具有良好的循环稳定性。本研究中设计合成珊瑚状结构的方法也可推广到其他光催化和光学材料的合成。
A coral-like ZnO/C-ZnFe2O4 (Z/C-ZFO) photocatalyst was synthesized by simulating the structural characteristics of coral since its structure is conducive to the capture and absorption of light. The synthesis process involves a two-step process. First, flowerlike hierarchical precursors were synthesized through a hydrothermal self-assembled route. Next, the precursors were thermally annealed in a nitrogen atmosphere after doping with a zinc source. In addition to forming heterojunctions that enhance its photocatalytic properties, the coral-like nanostructures endowed Z/C-ZFO with significant light-harvesting efficiency. Finally, the photocatalyst was used for antibacterial applications against Escherichia coli and Staphylococcus aureus bacteria. The results showed that the optimized sterilization efficiencies toward E. coli and S. aureus bacteria were 99.4 and 98.0%, respectively, combined with excellent cycling stability. The method of designing and synthesizing coral-like structures in this study may also be extended to the synthesis of other photocatalytic and optical materials.