Silver/Reduced graphene oxide hydrogel as novel bactericidal filter for point-of-use water disinfection

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Nanomaterials open an alternative way for water disinfection. However, limitations such as aggregation, toxicity, and complex post-treatment block their practical application. In this study, an antibacterial silver/reduced graphene oxide (Ag/rGO) hydrogel consisting of controlled porous rGO network and well-dispersed Ag nanoparticle is synthesized by a facile hydrothermal reaction. Scanning electron microscopy, transmission electron microscope, X-ray diffraction, mercury porosimetry, and Fourier transform IR spectroscopy are employed to characterize the Ag/rGO hydrogel. The 3D structure of the rGO network serves as an excellent support for Ag nanoparticles. Disinfection experiments show that the Ag/rGO hydrogel exhibits good efficacy against Escherichia coli when used as a bactericidal filter driven by gravity. The mechanistic study indicates that bacteria cells are inactivated due to cell membrane damage induced by silver nanoparticles and rGO nanosheets when they flow through Ag/rGO hydrogel. Moreover, due to the retaining of Ag by rGO, the leaching level of silver from Ag/rGO hydrogel is considerably lower than the drinking water standard. This study sheds new light on designing antibacterial materials for point-of-use water disinfection application.
Original languageEnglish
Pages (from-to)4344 - 4351
Number of pages8
JournalAdvanced Functional Materials
Volume25
Issue number27
DOIs
Publication statusPublished - 2015

Cite this

@article{8b05b7a64db545ce99bc0c4e4973bb92,
title = "Silver/Reduced graphene oxide hydrogel as novel bactericidal filter for point-of-use water disinfection",
abstract = "Nanomaterials open an alternative way for water disinfection. However, limitations such as aggregation, toxicity, and complex post-treatment block their practical application. In this study, an antibacterial silver/reduced graphene oxide (Ag/rGO) hydrogel consisting of controlled porous rGO network and well-dispersed Ag nanoparticle is synthesized by a facile hydrothermal reaction. Scanning electron microscopy, transmission electron microscope, X-ray diffraction, mercury porosimetry, and Fourier transform IR spectroscopy are employed to characterize the Ag/rGO hydrogel. The 3D structure of the rGO network serves as an excellent support for Ag nanoparticles. Disinfection experiments show that the Ag/rGO hydrogel exhibits good efficacy against Escherichia coli when used as a bactericidal filter driven by gravity. The mechanistic study indicates that bacteria cells are inactivated due to cell membrane damage induced by silver nanoparticles and rGO nanosheets when they flow through Ag/rGO hydrogel. Moreover, due to the retaining of Ag by rGO, the leaching level of silver from Ag/rGO hydrogel is considerably lower than the drinking water standard. This study sheds new light on designing antibacterial materials for point-of-use water disinfection application.",
author = "Zeng, {Max Xiangkang} and McCarthy, {David Thomas} and Ana Deletic and Xiwang Zhang",
year = "2015",
doi = "10.1002/adfm.201501454",
language = "English",
volume = "25",
pages = "4344 -- 4351",
journal = "Advanced Functional Materials",
issn = "1616-301X",
publisher = "Wiley-VCH Verlag GmbH & Co. KGaA",
number = "27",

}

Silver/Reduced graphene oxide hydrogel as novel bactericidal filter for point-of-use water disinfection. / Zeng, Max Xiangkang; McCarthy, David Thomas; Deletic, Ana; Zhang, Xiwang.

In: Advanced Functional Materials, Vol. 25, No. 27, 2015, p. 4344 - 4351.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Silver/Reduced graphene oxide hydrogel as novel bactericidal filter for point-of-use water disinfection

AU - Zeng, Max Xiangkang

AU - McCarthy, David Thomas

AU - Deletic, Ana

AU - Zhang, Xiwang

PY - 2015

Y1 - 2015

N2 - Nanomaterials open an alternative way for water disinfection. However, limitations such as aggregation, toxicity, and complex post-treatment block their practical application. In this study, an antibacterial silver/reduced graphene oxide (Ag/rGO) hydrogel consisting of controlled porous rGO network and well-dispersed Ag nanoparticle is synthesized by a facile hydrothermal reaction. Scanning electron microscopy, transmission electron microscope, X-ray diffraction, mercury porosimetry, and Fourier transform IR spectroscopy are employed to characterize the Ag/rGO hydrogel. The 3D structure of the rGO network serves as an excellent support for Ag nanoparticles. Disinfection experiments show that the Ag/rGO hydrogel exhibits good efficacy against Escherichia coli when used as a bactericidal filter driven by gravity. The mechanistic study indicates that bacteria cells are inactivated due to cell membrane damage induced by silver nanoparticles and rGO nanosheets when they flow through Ag/rGO hydrogel. Moreover, due to the retaining of Ag by rGO, the leaching level of silver from Ag/rGO hydrogel is considerably lower than the drinking water standard. This study sheds new light on designing antibacterial materials for point-of-use water disinfection application.

AB - Nanomaterials open an alternative way for water disinfection. However, limitations such as aggregation, toxicity, and complex post-treatment block their practical application. In this study, an antibacterial silver/reduced graphene oxide (Ag/rGO) hydrogel consisting of controlled porous rGO network and well-dispersed Ag nanoparticle is synthesized by a facile hydrothermal reaction. Scanning electron microscopy, transmission electron microscope, X-ray diffraction, mercury porosimetry, and Fourier transform IR spectroscopy are employed to characterize the Ag/rGO hydrogel. The 3D structure of the rGO network serves as an excellent support for Ag nanoparticles. Disinfection experiments show that the Ag/rGO hydrogel exhibits good efficacy against Escherichia coli when used as a bactericidal filter driven by gravity. The mechanistic study indicates that bacteria cells are inactivated due to cell membrane damage induced by silver nanoparticles and rGO nanosheets when they flow through Ag/rGO hydrogel. Moreover, due to the retaining of Ag by rGO, the leaching level of silver from Ag/rGO hydrogel is considerably lower than the drinking water standard. This study sheds new light on designing antibacterial materials for point-of-use water disinfection application.

UR - http://onlinelibrary.wiley.com.ezproxy.lib.monash.edu.au/doi/10.1002/adfm.201501454/epdf

U2 - 10.1002/adfm.201501454

DO - 10.1002/adfm.201501454

M3 - Article

VL - 25

SP - 4344

EP - 4351

JO - Advanced Functional Materials

JF - Advanced Functional Materials

SN - 1616-301X

IS - 27

ER -