Silver-Incorporated Mussel-Inspired Polydopamine Coatings on Mesoporous Silica as an Efficient Nanocatalyst and Antimicrobial Agent
Silver-Incorporated Mussel-Inspired Polydopamine Coatings on Mesoporous Silica as an Efficient Nanocatalyst and Antimicrobial Agent
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DOI：
10.1021/acsami.7b18136
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发表时间：
2018-01-17
影响因子：
9.5
通讯作者：
Chen, Jin
中科院分区：
文献类型：
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作者：
Song, Yiyan;Jiang, Huijun;Chen, Jin
为了解决严重的环境污染问题，寻求经济环保的制剂材料是公众健康的需求。在本研究中，开发了一种新的方法，原位形成银纳米粒子在温和的条件下，使用仿生还原剂聚多巴胺包覆在棒状介孔二氧化硅的SBA-15。采用物理化学和电化学相结合的方法对合成的SBA-15/聚多巴胺（PDA）/Ag纳米复合材料进行了表征。4-以4-硝基苯酚（4-NP）和亚甲基蓝（MB）为降解模型，对所制备的SBA-15/PDA/Ag纳米催化剂进行了评价，结果表明，复合材料对4-NP溶液和MB膜的降解分别表现出较好的催化性能。此外，与固体核壳SiO2/PDA/Ag相比，管状SBA-15/PDA/Ag对以大肠杆菌（60 h）、金黄色葡萄球菌（36 h）和烟曲霉（60 h）为代表的微生物生长显示出延长的抑制效果，这证明了银纳米颗粒从介孔释放的有效控制。所构建的SBA-15/PDA/Ag双功能材料作为长效抗菌剂和工业产品的催化剂，为解决环境问题提供了一个集成的纳米平台。
To tackle severe environmental pollution, a search for materials by economical and eco-friendly preparations is demanding for public health. In this study, a novel in situ method to form silver nanoparticles under mild conditions was developed using biomimetic reducing agents of polydopamine coated on the rodlike mesoporous silica of SBA-15. The synthesized SBA-15/polydopamine (PDA)/Ag nanocomposites were characterized by a combination of physicochemical and electrochemical methods. 4-Nitrophenol (4-NP) and methylene blue (MB) were used as models for the evaluation of the prepared nanocatalysts of SBA-15/PDA/Ag in which the composite exhibited enhanced catalytic performance toward degrading 4-NP in solution and MB on the membrane, respectively. Additionally, compared with that of solid core-shell SiO2/PDA/Ag, tubular SBA-15/PDA/Ag showed the prolonged inhibitory effect on microbial growth as typified by Escherichia coli (60 h), Staphylococcus aureus (36 h), and Aspergillus fumigatus (60 h), which demonstrated efficient control of silver nanoparticles release from the mesopores. The constructed dual-functional SBA-15/PDA/Ag as the long-term antimicrobial agent and the catalyst of industrial products provides an integrated nanoplatform to deal with environmental concerns.