Synthesis and bactericidal action of Fe3O4/AgO bifunctional magnetic-bactericidal nanocomposite

被引：13
作者：
Ge, Yanfeng [1 ,3 ]
Shen, Wenning [1 ,3 ]
Wang, Xu [1 ,3 ]
Feng, Hui [2 ]
Feng, Lajun [1 ,3 ]
机构：
[1] Xian Univ Technol, Sch Mat Sci & Engn, 5 South Jinhua Rd, Xian 710048, Shaanxi, Peoples R China
[2] Shaanxi Inst Zool, Xian 710032, Shaanxi, Peoples R China
[3] Xian Univ Technol, Key Lab Corros & Protect Shaanxi Prov, 5 South Jinhua Rd, Xian 710048, Shaanxi, Peoples R China
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2019年 / 563卷
关键词：
Divalent silver oxide; Nanocomposite; Magnetic separation; Bactericidal; SILVER NANOPARTICLES; ANTIBACTERIAL ACTIVITY; WATER; CHLORINATION; PERFORMANCE; OZONATION; CATALYST; REMOVAL; FACILE;
D O I：
10.1016/j.colsurfa.2018.11.063
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
AgO-Fe3O4 hybrid is a promising bactericidal agent for water purification, because of its strong antimicrobial activity and magnetically recoverable performance. However, the complicated preparing process, raw materials waste and milling medium contamination of AgO-Fe3O4 hybrids have limited its practical application. In this paper, Fe3O4/AgO nanocomposite synthesized via a simple chemical oxidation method was investigated. The nanocomposite with 35.0 wt% AgO content was composed of monoclinic AgO and cubic Fe3O4. The nanocomposite exhibited strong antimicrobial properties, superparamagnetic behavior, good magnetically recoverable performance and bactericidal stability. When the concentration was 20 mg. L-1, more than 98.5% of S. aureus or E. coli was killed in 25 min. Further increasing the concentration to 5000 mg. L-1, all of the two bacteria were killed in 25 min. Finally, based on present investigation, a plausible bactericidal mode of action for the nanocomposite against S. aureus and E. coli was proposed.
引用
收藏
页码：160 / 169
页数：10
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