Fabrication of a Double-Shell Ag/AgCl/G-ZnFe2O4 Nanocube with Enhanced Light Absorption and Superior Photocatalytic Antibacterial Activity
Fabrication of a Double-Shell Ag/AgCl/G-ZnFe2O4 Nanocube with Enhanced Light Absorption and Superior Photocatalytic Antibacterial Activity
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具有增强光吸收和优异光催化抗菌活性的双壳Ag/AgCl/G-ZnFe2O4纳米立方体的制备
DOI：
10.1021/acsami.0c01476
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发表时间：
2020
影响因子：
9.5
通讯作者：
Ma Weigang
中科院分区：
文献类型：
--
作者：
Zhang Chun;Gu Yinan;Teng Guixiang;Wang Liping;Jin Xiaodong;Qiang Zengwei;Ma Weigang
高效光催化剂的开发是光催化领域的主要目标，其中具有协同光催化效应的可重复使用的复合材料引起了广泛的兴趣。催化剂捕获光的能力决定了其光催化效果，多孔或中空的光催化剂更有利于光的进入和反射。本研究的目的是开发一种具有高抗菌活性和良好循环稳定性的可见光驱动双壳层光催化剂。以空心石墨化ZnFe 2 O 4纳米球（G-ZnFe 2 O 4）为载体制备了光催化剂。以聚多巴胺（PDA）为模板层对G-ZnFe 2 O 4进行功能化修饰后，在PDA/G-ZnFe 2 O 4纳米球表面依次原位生成了Ag纳米粒子（NPs）和AgCl纳米粒子。然后，用KOH溶液去除PDA模板，构建了具有优良光催化抗菌活性的双壳层Ag/AgCl/G-ZnFe 2 O 4纳米立方体（简称DAGZNs）。DAGZNs对金黄色葡萄球菌和大肠杆菌表现出良好的抗菌性能。DAGZNs的高效协同光催化抗菌活性以及磁分离性和可回收性使其在水净化和环境保护方面具有实际应用潜力。设计和合成双壳层结构以增强光催化性能的方法也可以扩展到其他光催化和光学材料的合成。
Development of highly efficient photocatalysts is a primary goal in the photocatalysis domain among which reusable composites with a synergistic photocatalytic effect have attracted extensive interest. The ability of catalysts to capture light determines their photocatalytic effect, and porous or hollow photocatalysts are more conducive to the entry and reflection of light. The goal of this research is to develop a type of visible-light-driven, double-shell photocatalyst with high antibacterial activity and excellent cycling stability. Photocatalysts were fabricated using hollow graphitized ZnFe2O4nanospheres (G-ZnFe2O4) as the carrier. After G-ZnFe2O4was functionalized with a polydopamine (PDA) template layer, Ag nanoparticles (NPs) and cubic AgCl NPs were in situ generated on the surface of the PDA/G-ZnFe2O4nanospheres successively. Then, the PDA template was removed using KOH solution, and double-shell Ag/AgCl/G-ZnFe2O4nanocubes (referred to as DAGZNs) with excellent photocatalytic antibacterial activity were constructed. The DAGZNs showed excellent antibacterial properties againstStaphylococcus aureusandEscherichia coli. The efficient synergistic photocatalytic antibacterial activity coupled with magnetic separability and recyclability of DAGZNs make them potential for practical application in water purification and environmental protection. The method of designing and synthesizing double-shell structures to enhance photocatalysis may also be extended to synthesis of other photocatalytic and optical materials.