Antibacterial properties and mechanism of graphene oxide-silver nanocomposites as bactericidal agents for water disinfection

2016 ◽  
Vol 604 ◽  
pp. 167-176 ◽  
Author(s):  
Biao Song ◽  
Chang Zhang ◽  
Guangming Zeng ◽  
Jilai Gong ◽  
Yingna Chang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Antibacterial Properties ◽  
Water Disinfection ◽  
Silver Nanocomposites

scholarly journals An N-Halamine/Graphene Oxide-Functionalized Electrospun Polymer Membrane That Inactivates Bacteria on Contact and by Releasing Active Chlorine

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2784
Author(s):  
Shi Lan ◽  
Jinghua Zhang ◽  
Jie Li ◽  
Yanan Guo ◽  
Xianliang Sheng ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Antibacterial Properties ◽  
Polymer Membrane ◽  
Water Disinfection ◽  
Fibrous Membrane ◽  
Active Chlorine ◽  
Public Health Issue ◽  
Emerging Pathogens ◽  
Electrospinning Technique ◽  
E Coli

The emergence of antibiotic-resistant “superbugs” in recent decades has led to widespread illness and death and is a major ongoing public health issue. Since traditional antimicrobials and antibiotics are in many cases showing limited or no effectiveness in fighting some emerging pathogens, there is an urgent need to develop and explore novel antibacterial agents that are both powerful and reliable. Combining two or more antibiotics or antimicrobials has become a hot topic in antibacterial research. In this contribution, we report on using a simple electrospinning technique to create an N-halamine/graphene oxide-modified polymer membrane with excellent antibacterial activity. With the assistance of advanced techniques, the as-obtained membrane was characterized in terms of its chemical composition, morphology, size, and the presence of active chlorine. Its antibacterial properties were tested with Escherichia coli (E. coli) as the model bacteria, using the colony-counting method. Interestingly, the final N-halamine/graphene oxide-based antibacterial fibrous membrane inactivated E. coli both on contact and by releasing active chlorine. We believe that the synergistic antimicrobial action of our as-fabricated fibrous membrane should have great potential for utilization in water disinfection, air purification, medical and healthcare products, textile products, and other antibacterial-associated fields.

Preparation of polycrystalline ZnO nanoparticles loaded onto graphene oxide and their antibacterial properties

2021 ◽  
pp. 102531
Author(s):  
Xin Zhang ◽  
Huanxian Shi ◽  
Enzhou Liu ◽  
Xiaoyun Hu ◽  
Ke Zhang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Zno Nanoparticles ◽  
Antibacterial Properties

Preparation of quaternarized N-halamine-grafted graphene oxide nanocomposites and synergetic antibacterial properties

2021 ◽  
Author(s):  
Danlin Bu ◽  
Yu Zhou ◽  
Chang Yang ◽  
Hengyu Feng ◽  
Chunxia Cheng ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Antibacterial Properties

scholarly journals A short review of titania-graphene oxide based composites as a photocatalysts

2021 ◽  
Vol 10 (2) ◽  
pp. 51-60
Author(s):  
Katarina Stepić ◽  
Radomir Ljupković ◽  
Jovana Ickovski ◽  
Aleksandra Zarubica
Keyword(s):  
Graphene Oxide ◽  
Water Purification ◽  
Organic Contaminants ◽  
Environmental Pollutants ◽  
Short Review ◽  
Sorption Process ◽  
Water Disinfection ◽  
Co Catalysts ◽  
Photocatalytic Reactions ◽  
Chemical Wastes

New and effective methods of water purification are necessary to minimize pollution. Many methods have been used in wastewater treatment, but sorption is considered as an easy and economic process. The efficiency of any sorption process mainly depends on the physicochemical properties of the used adsorbent. Since photocatalysts can initiate reactions of decomposition organic contaminants under ultraviolet or sunlight irradiation without using chemicals or producing chemical wastes, photocatalytic reactions are considered a sustainable way to remove a variety of environmental pollutants. Ultraviolet water purification became the most effective method of water disinfection and purification. Heterogeneous semiconductor photocatalysts have recently emerged as an efficient material for purifying water. The crystal structure is crucial for photocatalytic activity and efficiency of semiconductors, thus optimal parameters must be provided during the preparation of photocatalysts. To overcome problems with semiconductors usage, the use of co-catalysts and photocatalyst carriers is one of the solutions. Recently, much emphasis has been placed on using graphene oxide (GO) supported semiconductor photocatalysts. In this paper, a short review of composites of titanium dioxide and graphene oxide-based materials is given.

The antifungal activity of graphene oxide–silver nanocomposites

Biomaterials ◽  
2013 ◽  
Vol 34 (15) ◽  
pp. 3882-3890 ◽  
Author(s):  
Chao Li ◽  
Xiansong Wang ◽  
Feng Chen ◽  
Chunlei Zhang ◽  
Xiao Zhi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Antifungal Activity ◽  
Silver Nanocomposites

scholarly journals Antimicrobial and Antibiofilm Properties of Graphene Oxide on Enterococcus faecalis

Antibiotics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 692
Author(s):  
Cecilia Martini ◽  
Francesca Longo ◽  
Raffaella Castagnola ◽  
Luca Marigo ◽  
Nicola Maria Grande ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Enterococcus Faecalis ◽  
Antibacterial Properties ◽  
Luria Bertani ◽  
Bacterial Suspension ◽  
Adhesion Properties ◽  
High Antibacterial Activity ◽  
Luria Bertani Broth ◽  
Bacterial Film

The aim of this study was to evaluate the antibacterial properties of graphene oxide (GO) against Enterococcus faecalis in vitro conditions and when used to coat dentin surface to prevent E. faecalis adhesion. The ATCC strain of E. faecalis 29212 has been used to perform a viability test. The pellet was suspended in ultrapure water, NaCl, PBS buffer, CaCl2 and MgCl2, Luria−Bertani broth solutions. The viability was evaluated by the colony forming unit counting method. Atomic force microscopy images and the measure of surface zeta potential variation were analyzed. Dentin discs were covered with a film of GO (n = 15) or were not treated (n = 15). Bacterial suspension was added to each sample of dentine discs and microbial counts were calculated. Statistically significant differences between two groups were assessed by a two-tailed unpaired t-test. Bacteria cell morphology was investigated with scanning electron microscopy. The highest growth inhibition was obtained in ddH2O and CaCl2 solution while, in PBS and NaCl, GO had poor antibacterial efficacy with a growth enhancing effect in the latter. GO on dentin discs demonstrated high antibacterial activity. GO film has demonstrated acceptable adhesion properties to root dentin and a role in the inhibition of bacterial film proliferation and biofilm formation.

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