Bactericidal activity under UV and visible light of cotton fabrics coated with anthraquinone-sensitized TiO2

Rahal, Raed; Béchec, Mickaël Le; Guyoneaud, Rémy; Pigot, Thierry; Paolacci, H.; Lacombe, Sylvie

doi:10.1016/j.cattod.2012.10.012

Cited by 17 publications

(9 citation statements)

References 64 publications

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“…The bactericidal activity of cotton fabrics coated with anthraquinone-sensitized TiO 2 has been investigated under UVA and UV-free visible irradiation [34]. Ohko et al [25] reported that the TiO 2 photocatalyst was successfully used as a coating in silicon catheters and medical tubes.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

The sol–gel synthesis of cotton/TiO2 composites and their antibacterial properties

Galkina

Sycheva

Blagodatskiy

et al. 2014

Surface and Coatings Technology

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Access to the published version may require journal subscription. Published with permission from: Elsevier.Standard set statement from the publisher: This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT AbstractPresent work is devoted to investigation of structure and functional properties of hybrid nanomaterials based on the TiO 2 -modified cellulose fibers of cotton. The titania hydrosol was successfully prepared using the titanium tetraisopropoxide as precursor and the nitric acid as peptizing agent via the low-temperature sol-gel synthesis in aqueous medium and applied to cotton fabric. For cross-linking of titania nanoparticles to cotton the 1,2,3,4-butanetetracarboxylic acid (BTCA) was used as a spacer. The morphology and composition of the surface pure and TiO 2 modified cotton fibers were investigated by the Scanning Electron Microscopy (SEM). The cotton/TiO 2 composite was characterized by the dielectric permittivity.For the estimation of total titania concentration, all samples were calcined at 650°C. The antimicrobial activity of the treated TiO 2 cotton fibers was investigated against Escherichia coli as a model Gram -negative bacteria after exposure to UV-irradiation for 10 minutes.

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Section: Accepted M Manuscriptmentioning

confidence: 99%

The sol–gel synthesis of cotton/TiO2 composites and their antibacterial properties

Galkina

Sycheva

Blagodatskiy

et al. 2014

Surface and Coatings Technology

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“…A previous study has reported the use of extender pigments to reduce the amount of TiO2 present in the composition of the acrylic paints [152]. Several textiles such as cotton, polyester and rayon fibers can be coated or grafted with TiO2 through techniques as sol-gel, reflux, dip-coating, spin-coating and so on [261,262,263]. Another eco-friendly application that can be exploited commercially is the J o u r n a l P r e -p r o o f coating of textile materials with photoactive materials that help to deodorize and eliminate pathogenic microorganisms.…”

Section: Practical Ecofriendly Applicationsmentioning

confidence: 99%

An approach to the photocatalytic mechanism in the TiO2-nanomaterials microorganism interface for the control of infectious processes

Rodríguez-González

Obregón

Patrón-Soberano

et al. 2020

Applied Catalysis B: Environmental

135

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J o u r n a l P r e -p r o o f 2 Graphical Abstract Highlights  Photoactive TiO2 nanomaterials can solve the actual microbial infectious defies  The microbial cell/TiO2 surface approach is key to get the photo-kill mechanism  Microbial preparation requires a reproducible protocol for proper characterization  Advanced surface characterization techniques can unravel the photo-kill mechanism  Generation of ROS, physical injuries and biocidal features confirm the annihilation J o u r n a l P r e -p r o o f Abstract The approach of this timely review considers the current literature that is focused on the interface nanostructure/cell-wall microorganism to understand the annihilation mechanism. Morphological studies use optical and electronic microscopes to determine the physical damage on the cell-wall and the possible cell lysis that confirms the viability and microorganism death. The key parameters of the tailoring the surface of the photoactive nanostructures such as the metal functionalization with bacteriostatic properties, hydrophilicity, textural porosity, morphology and the formation of heterojunction systems, can achieve the effective eradication of the microorganisms under natural conditions, ranging from practical to applications in environment, agriculture, and so on. However, to our knowledge, a comprehensive review of the microorganism/nanomaterial interface approach has rarely been conducted. The final remarks point the ideal photocatalytic way for the effective prevention/eradication of microorganisms, considering the resistance that the microorganism could develop without the appropriate regulatory aspects for human and ecosystem safety. Introduction and background 1. TiO 2 based materials obtained from TiO 2 and its composites J o u r n a l P r e -p r o o f previous studies have demonstrated that photocatalysis can be considered a promising tool in anticancer therapies, since the photocatalyst can kill cancer cells such as HeLa cells, which cause cervical cancer [7]. The energy absorbed by the photocatalyst comprises the range of ultraviolet and/or visible light, even natural sunlight. When the photocatalyst absorbs light, if the energy of the photons is enough to excite the electrons J o u r n a l P r e -p r o o f 6in the valence band (VB), then they migrate to a higher energy level in the conduction band (CB) of the material, as it is illustrated in Fig. 1. This phenomenon generates the charge carriers known as hole-electron pairs. The photogenerated hole can migrate to the surface of the material and react with water molecules or hydroxyl ions to produce hydroxyl radicals, while the photoexcited electron in the conduction band can react with the adsorbed molecular oxygen to produce superoxide ions [8]. Since the report of Fujishima and Honda about the water splitting process using a TiO2 electrode under UV irradiation, numerous studies have exploited the photoactive properties of this material [9,10]. Several reviews have studied the relationship between the electronic properties of TiO2 with...

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“…Antimicrobial photodynamic inactivation (aPDI) of microorganisms like bacteria, fungi, and viruses is an attractive tool that has been recently employed to prevent the spreading and growth of microbial pathogens. This approach implies the use of a photosensitizer, which in combination with light leads to the generation of cytotoxic species like singlet oxygen ( 1 O 2 ) or superoxide (O 2 • – ). − A great number of publications have appeared during the last years, advocating for the use of this strategy, with an emphasis in the development of materials, − especially to be used for the manufacture of healthcare-related objects. − …”

Section: Introductionmentioning

confidence: 99%

Photodynamic Inactivation of Staphylococcus aureus Biofilms Using a Hexanuclear Molybdenum Complex Embedded in Transparent polyHEMA Hydrogels

López-López

Resta

Llanos

et al. 2020

ACS Biomater. Sci. Eng.

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Three new photoactive polymeric materials embedding a hexanuclear molybdenum cluster (Bu4N)2[Mo6I8(CH3COO)6] (1) have been synthesized and characterized by means of Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and emission spectroscopy. The materials are obtained in the format of transparent and thin sheets, and the formulations used to synthesize them are comprised of 2-hydroxyethyl methacrylate (HEMA), as a polymerizable monomer, and ethylene glycol dimethacrylate (EGDMA) or poly(ethylene glycol)dimethacrylate (PEGDMA), as cross-linkers. All the polymeric hydrogels generate singlet oxygen (1O2) upon irradiation with visible light (400–700 nm), as demonstrated by the reactivity toward two chemical traps of this reactive species (9,10-dimethylanthracene and 1,5-dihydroxynaphthalene). Some differences have been detected between the photoactive materials, probably attributable to variations in the permeability to solvent and oxygen. Notably, one of the materials resisted up to 10 cycles of photocatalytic oxygenation reactions of 1,5-dihydroxynaphthalene. All three of the polyHEMA hydrogels doped with 1 are efficient against S. aureus biofilms when irradiated with blue light (460 nm). The material made with the composition of 90% HEMA and 10% PEGDMA (Mo6@polymer-III) is especially easy to handle, because of its flexibility, and it achieves a notable level of bacterial population reduction (3.0 log10 CFU/cm2). The embedding of 1 in cross-linked polyHEMA sheets affords a protective environment to the photosensitizer against aqueous degradation while preserving the photochemical and photobactericidal activity.

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Bactericidal activity under UV and visible light of cotton fabrics coated with anthraquinone-sensitized TiO2

Cited by 17 publications

References 64 publications

The sol–gel synthesis of cotton/TiO2 composites and their antibacterial properties

The sol–gel synthesis of cotton/TiO2 composites and their antibacterial properties

An approach to the photocatalytic mechanism in the TiO2-nanomaterials microorganism interface for the control of infectious processes

Photodynamic Inactivation of Staphylococcus aureus Biofilms Using a Hexanuclear Molybdenum Complex Embedded in Transparent polyHEMA Hydrogels

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