Preparation, catalytic property and antibacterial property of Ag@Fe3O4 core-shell composite nanomaterials

被引：0

作者：

Guo S. ^{[1
]}

Liang Y. ^{[1
]}

Ji X. ^{[1
]}

Lan A. ^{[2
]}

Huang P. ^{[1
]}

Du Q. ^{[1
]}

Ma J. ^{[1
]}

机构：

[1] School of Chemistry and Environmental Science, Shaanxi University of Technology, Hanzhong

[2] School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong

来源：

Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2021年 / 38卷 / 03期

关键词：

Ag; Catalytic; Composite materials; Fe[!sub]3[!/sub]O[!sub]4[!/sub; Inhibition; The Core-shell type;

D O I：

10.13801/j.cnki.fhclxb.20200623.001

中图分类号：

学科分类号：

摘要：

The Ag@Fe3O4 composites with nano core-shell structure were successfully prepared by a one-pot method. The resulting Ag@Fe3O4 composites were characterized by TEM, XRD, UV-vis DRS and vibrating sample magnetometry (VSM). The catalytic performance and mechanism of Ag@Fe3O4 composites were investigated by photometrically monitoring the reduction of methyl orange in the presence of excess of NaBH4. Furthermore, the antibacterial of Ag@Fe3O4 composites against Staphylococcus aureus (S.aureus) and Escherichia coli (E.coli) was studied by the paper diffusion experiment using Ag and Fe3O4 as the references. The results indicate that over 98% of methyl orange is catalytically degraded within 10 min. This superior catalytic activity may be resulted from transferring electron to N=N bond by Ag, thereby causing N=N fracture and generating sodium 4-aminobenzenesulfonate and p-diaminobenzene. Antibacterial experiment shows that Ag@Fe3O4 composites more excellent bacteriostatic activity than Ag and is more sensitive to E.coli than to S.aureus. The main reason can be ascribed to the fact that phospholipid bilayer in cell wall of E.coli is thinner than that of S.aureus. Copyright ©2021 Acta Materiae Compositae Sinica. All rights reserved.

引用

页码：816 / 823

页数：7

共 25 条

[1] SONG S Y, LIU R X, ZHANG Y, Et al., Colloidal noble-metal and bimetallic alloy nanocrystals: A general synthetic method and their catalytic hydrogenation properties, Chemistry: A European Journal, 16, 21, pp. 6251-6256, (2010)
[2] PRADHAN N, ANLI P., Catalytic reduction of aromatic nitro compounds by coinage metal nanoparticles, Langmuir, 17, 5, pp. 1800-1802, (2001)
[3] MEI L, LU Z T, ZHANG X G., Polymer-Ag nanocomposites with enhanced antimicrobial activity against bacterial infection, ACS Applied Materials & Interfaces, 6, 18, pp. 15813-15821, (2014)
[4] CONG Y, XIA T, ZOU M, Et al., Mussel-inspired polydopamine coating as aversatile platform for synthesizing polystyrene/Ag nanocomposite particles with enhanced antibacterial activities, Journal of Materials Chemistry B, 2, 22, pp. 3450-3461, (2014)
[5] DENG H, MCSHAN D, ZHANG Y, Et al., Mechanistic study of the synergistic antibacterial activity of combined silver nanoparticles and common antibiotics, Environmental Science & Technology, 50, 16, pp. 8840-8848, (2016)
[6] ZHOU W H, JIA Z J, XIONG P, Et al., Bioinspired and biomimetic AgNPs/gentamicin-embedded silk fibroin coatings for robust antibacterial and osteogenetic applications, ACS Applied Materials & Interfaces, 9, 31, pp. 25830-25846, (2017)
[7] ZHENG K Y, MAGDIEL I, SETYA W, Et al., Antimicrobial cluster bombs: Silver nanoclusters packed with daptomycin, ACS Nano, 10, 8, pp. 7934-7942, (2016)
[8] HAMIDREZA A, EHSAN N K, SAMANEH K, Et al., Multifunctional thin-film nanofiltration membrane incorporated with reduced graphene oxide@TiO2@Ag nanocomposites for high desalination performance, dye retention, and antibacterial properties, ACS Applied Materials & Interfaces, 11, 26, pp. 23535-23545, (2019)
[9] DAVIT J, WU Y T, WANG D., Preparation and self-assembly of dendronized janus Fe3O4-Pt and Fe3O4-Au heterodimers, ACS Nano, 11, 8, pp. 7958-7966, (2017)
[10] OLENA I C, JUSTYNA J S, EERSON C, Et al., Fourier transform infrared and Raman spectroscopy studies on magnetite/Ag/antibiotic nanocomposites, Applied Surface Science, 364, pp. 400-409, (2016)

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