文献类型：期刊文献

英文题名：A Facile Method for Synthesis of Silver and Fe3O4 Reusable Hierarchical Nanocomposite for Antibacterial Applications

作者：Qin, Peng[1];Chen, Chao[1];Wang, Yibing[1];Zhang, Liting[1,2];Wang, Ping[1]

机构：[1]East China Univ Sci & Technol, Biomed Nanotechnol Ctr, State Key Lab Bioreactor Engn, Sch Biotechnol, Shanghai 200237, Peoples R China;[2]Zhejiang Univ Sci & Technol, Key Lab Recycling & Ecotreatment Waste Biomass Zh, Hangzhou 310023, Zhejiang, Peoples R China

年份：2017

卷号：17

期号：12

起止页码：9350

外文期刊名：JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY

收录：;EI(收录号：20174004232031);WOS:【SCI-EXPANDED(收录号:WOS:000417111000098)】；

基金：This work was supported by the National Natural Science Foundation of China (31471659 and 21636003), the Fundamental Research Funds for the Central Universities (222201514327), the International Science and Technology Cooperation Program of China (2014DFE90040), and the National Thousand Talents Program of China.

语种：英文

外文关键词：Silver Nanoparticle; Nanocomposite; Antibacterial Materials; Magnetic Materials; Water Contamination

摘要：Silver (Ag) nanoparticles are effective disinfectants that offer a broad-spectrum of antibacterial activities. However, concerns about releasing Ag-based disinfectants into environment have significantly limited their large-scale applications. In this study, a facile and environmentally benign method was developed to grow Ag nanoparticles on polydopamine-functionalized Fe3O4 particles, forming a hierarchical Fe3O4-polydopamine-Ag nanocomposite. The polydopamine layer was coated on the surface of the Fe3O4 particles via self-polymerization under ambient conditions; it subsequently facilitated the formation of Ag nanoparticles from [Ag(NH3)(2)](+) and provided anchoring sites for the immobilization of the Ag nanoparticles. The nanocomposite presented excellent antibacterial activities against both Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) bacteria, with respective minimum inhibitory concentration as 40 and 60 mu g/mL, respectively. Furthermore, the nanocomposite can be separated and recovered magnetically, avoiding environmental contamination and enabling particle reuse. Recycling tests showed that over 60% of the original antibacterial activity of the particles was retained after 6 cycles of reuse.