Antibacterial properties of TiO2 modified with reduced graphene oxide

Wanag, Agnieszka; Rokicka, Paulina; Kusiak-Nejman, Ewelina; Kapica-Kozar, Joanna; Wróbel, Rafał; Markowska‐Szczupak, Agata; Morawski, Antoni W.

doi:10.1016/j.ecoenv.2017.09.039

Cited by 102 publications

(43 citation statements)

References 38 publications

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“…However, the excitation wavelengths of these metal oxides are usually located in the UV region, which is not suitable for in vivo biomedical applications. After incorporating metal oxides with GMs, the excitation wavelength of the nanohybrids can be extended to the visible‐light region and the interaction between GMs and metal oxide NPs facilitates electron–hole pair separation, which thus enhances the photocatalytic disinfection efficiency …”

Section: Antimicrobial Activity Of Gmsmentioning

confidence: 99%

“…GMs have been combined with metal/metal oxide nanoparticles, such as AgNPs, [62][63][64][65][66][67][68][69][70][71][72] CuNPs, [73][74][75][76] Au nanostructures, [77À79] alloy NPs, [80,81] TiO 2 NPs, [82][83][84][85][86][87][88] ZnO NPs, [89][90][91][92] Fe 3 O 4 NPs, [93][94][95][96][97][98] CuO nanostractures, [99][100][101][102] SnO 2 NPs, [103] NiO NPs, [104] CeO 2 NPs, [105] and WO 3 NPs, [106] to form GM-metal nanohybrids. Some repre-sentativeG M-metaln anohybrids and their advantages are summarized in Ta ble 1.…”

Section: Gm Derivatives and Nanohybrids For Antimicrobial Applicationsmentioning

confidence: 99%

“…After incorporating metal oxideswith GMs,the excitation wavelength of the nanohybrids can be extended to the visiblelight region and the interaction between GMs andm etal oxide NPs facilitateselectron-hole pair separation, which thus enhances the photocatalytic disinfection efficiency. [85][86][87] Although GM-metal nanohybrids have shown many merits for antimicrobial applications,t he concerns of cytotoxicity toward mammalian cells caused by metal leakages hould not be ignored. Consequently,G Ms have also been used as nonmetal bactericide carriers to produce GM-metal-free nanohybrids.…”

Section: Gm Derivatives and Nanohybrids For Antimicrobial Applicationsmentioning

confidence: 99%

See 2 more Smart Citations

Two‐Dimensional Materials for Antimicrobial Applications: Graphene Materials and Beyond

Sun

2018

Chemistry An Asian Journal

123

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Since the "birth" of graphene in 2004, two-dimensional (2D) materials have attracted unprecedented research interest from scientists and have stimulated numerous applications in various fields, such as electronic/optical devices, energy storage, catalysis, sensors, and biomedicine. In this review, we summarize recent advances in the antimicrobial applications of 2D materials, such as graphene materials (GMs), layered double hydroxides (LDHs), transition-metal dichalcogenides (TMDs), graphitic carbon nitride (g-C N ), MXenes, black phosphorus (BP), and their derivatives. This review also correlates the unique physicochemical properties of 2D materials with their antimicrobial activities. Finally, some current challenges and future perspectives in this field are also presented.

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Section: Antimicrobial Activity Of Gmsmentioning

confidence: 99%

Section: Gm Derivatives and Nanohybrids For Antimicrobial Applicationsmentioning

confidence: 99%

Section: Gm Derivatives and Nanohybrids For Antimicrobial Applicationsmentioning

confidence: 99%

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Two‐Dimensional Materials for Antimicrobial Applications: Graphene Materials and Beyond

Sun

2018

Chemistry An Asian Journal

123

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“…In this respect, the inclusion of rGO to TiO 2 NPs can produce novel photocatalysts with improved antibacterial performance. There are few studies in the literature reporting bacterial inactivation of rGO/TiO 2 photocatalysts [101,102,276,277].…”

Section: Graphene and Mwnt Modified Titania Nanocompositesmentioning

confidence: 99%

“…More recently, Wanag et al fabricated (0.5-2.5 wt%) rGO/TiO 2 NPs using hydrothermal process at 180 • C for 4 h. The resulting products were finally heated in a furnace at 100 • C for 4 h [101]. Figure 27A,B shows the survival rate of E. coli treated with (0.5-2.5 wt%) rGO/TiO 2 NPs in the dark and under artificial solar light irradiation, respectively.…”

Section: Graphene and Mwnt Modified Titania Nanocompositesmentioning

confidence: 99%

Visible-Light Active Titanium Dioxide Nanomaterials with Bactericidal Properties

2020

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This article provides an overview of current research into the development, synthesis, photocatalytic bacterial activity, biocompatibility and cytotoxic properties of various visible-light active titanium dioxide (TiO2) nanoparticles (NPs) and their nanocomposites. To achieve antibacterial inactivation under visible light, TiO2 NPs are doped with metal and non-metal elements, modified with carbonaceous nanomaterials, and coupled with other metal oxide semiconductors. Transition metals introduce a localized d-electron state just below the conduction band of TiO2 NPs, thereby narrowing the bandgap and causing a red shift of the optical absorption edge into the visible region. Silver nanoparticles of doped TiO2 NPs experience surface plasmon resonance under visible light excitation, leading to the injection of hot electrons into the conduction band of TiO2 NPs to generate reactive oxygen species (ROS) for bacterial killing. The modification of TiO2 NPs with carbon nanotubes and graphene sheets also achieve the efficient creation of ROS under visible light irradiation. Furthermore, titanium-based alloy implants in orthopedics with enhanced antibacterial activity and biocompatibility can be achieved by forming a surface layer of Ag-doped titania nanotubes. By incorporating TiO2 NPs and Cu-doped TiO2 NPs into chitosan or the textile matrix, the resulting polymer nanocomposites exhibit excellent antimicrobial properties that can have applications as fruit/food wrapping films, self-cleaning fabrics, medical scaffolds and wound dressings. Considering the possible use of visible-light active TiO2 nanomaterials for various applications, their toxicity impact on the environment and public health is also addressed.

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