Broad spectrum antibacterial zinc oxide-reduced graphene oxide nanocomposite for water depollution

被引：20

作者：

Rajapaksha, P. ^{[1
]}

Orrell-Trigg, R. ^{[1
]}

Shah, D. ^{[1
]}

Cheeseman, S. ^{[1
]}

Vu, K. B. ^{[2
]}

Ngo, S. T. ^{[3
]}

Murdoch, B. J. ^{[4
]}

Choudhury, N. R. ^{[5
]}

Yin, H. ^{[5
]}

Cozzolino, D. ^{[6
]}

Truong, Y. B. ^{[7
]}

Lee, A. F. ^{[1
]}

Truong, V. K. ^{[1
]}

Chapman, J. ^{[1
]}

机构：

[1] RMIT Univ, Sch Sci, Melbourne, Vic 3000, Australia

[2] Int Univ, Sch Biotechnol, Dept Chem Engn, Ho Chi Minh City, Vietnam

[3] Ton Duc Thang Univ, Lab Theoret & Computat Biophys, Ho Chi Minh City, Vietnam

[4] RMIT Univ, RMIT Microscopy & Microanal Facil, Melbourne, Vic 3000, Australia

[5] RMIT Univ, Sch Engn, Melbourne, Vic 3000, Australia

[6] Univ Queensland, Ctr Nutr & Food Sci, QAAFI, Brisbane, Qld 4069, Australia

[7] CSIRO, Clayton, Vic 3168, Australia

来源：

MATERIALS TODAY CHEMISTRY | 2023年 / 27卷

基金：

澳大利亚研究理事会;

关键词：

Antimicrobial-resistance; Superbugs; Photocatalysis; Graphene oxide; Nanoparticles; ENHANCED PHOTOCATALYTIC PERFORMANCE; ANTIMICROBIAL ACTIVITY; ESCHERICHIA-COLI; NANOPARTICLES; SILVER; NANOMATERIALS; COMPOSITES; RESISTANCE; COPPER; DEGRADATION;

D O I：

10.1016/j.mtchem.2022.101242

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Antimicrobial-resistance (AMR) is a global health challenge arising from the evolution of bacteria, vi-ruses, fungi, and parasites, such that pathogenic microorganisms no longer respond to classical therapies. AMR and the rise of so-called 'superbugs' requires innovative nanomaterials and biostatic strategies. Here we report a broad spectrum, antimicrobial nanomaterial integrating light-responsive ZnO nano -particles (NP) and reduced graphene oxide (rGO) into a heterojunction semiconductor nanocomposite for water depollution. Simultaneous chemical reduction of Zn sulphate and GO sheets yields a low concentration (0.5 mol%) of 10 nm ZnO nanoparticles decorating fragmented rGO nanosheets, with a total surface area of 12 m2/g and optical band gap of 1.6 eV. Antimicrobial performance of the ZnO-rGO nanocomposite was evaluated against methicillin-resistant Staphylococcus aureus (MRSA), Escherichia coli 0157:H7 and Salmonella typhimurium bacteria, which are prevalent in contaminated aquatic systems; antimicrobial efficacy against these organisms was 96%, 97%, and 73%, respectively, for a loading of 2 mg/ mL, evidencing a strong synergy compared with pure ZnO or rGO components. ZnO-rGO was also an effective photocatalyst for the aqueous degradation of Malachite Green dye, suggesting that its mode of antibacterial action reflects the production of reactive oxygen species under ambient illumination.(c) 2022 Elsevier Ltd. All rights reserved.

引用

页数：11

共 94 条

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