Visible-Light-Driven, Dye-Sensitized TiO2 Photo-Catalyst for Self-Cleaning Cotton Fabrics

Ahmad, Ishaq; Kan, Chi Wai

doi:10.3390/coatings7110192

Cited by 38 publications

(26 citation statements)

References 34 publications

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“…Under light, this bacterial adhesion facilitates the charge transfer between the photocatalyst and the bacterial cell wall leading to cell wall damage [44]. The TiO2 photo-switchable surface wettability was extensively reported in the literature [45,46] and is beyond the scope of the present study focusing more on the effect of the NTs geometry on the bacterial inactivation. Figure 6 shows also a slight bacterial inactivation in the dark on Ag/TiO2-NTs.…”

Section: Accepted Manuscriptmentioning

confidence: 87%

Bacterial adhesion and inactivation on Ag decorated TiO2-nanotubes under visible light: Effect of the nanotubes geometry on the photocatalytic activity

Hajjaji

Elabidi

Trabelsi

et al. 2018

Colloids and Surfaces B: Biointerfaces

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This study investigates the effect of the diameter of TiO nanotubes and silver decorated nanotubes on optical properties and photocatalytic inactivation of Escherichia coli under visible light. The TiO nanotubes (TiO-NTs) were prepared using the electrochemical method varying the anodization potential starting from 20 V until 70 V. The Ag nanoparticles were carried out using the photoreduction process under the same experimental conditions. The diameter size was determined using the scanning electronic microscopy (SEM). TiO-NTs diameter reached ∼100 nm at 70 V. Transmission electronic microscopy (TEM) imaging confirmed the TiO-NTs surface decoration by silver nanoparticles. The Ag-NPs average size was found to be equal to 8 nm. The X-Ray diffraction (XRD) analysis confirm that all TiO-NTs crystallize in the anatase phases regardless the used anodization potential. The decrease of the photoluminescence (PL) intensity of Ag NPs decorated TiO-NTs indicates the decrease of the specific area when the nanotubes diameter increases. The UV-vis absorbance show that the absorption edges was bleu shifted with the increasing of nanotubes diameter, which can be explained by the increase of the crystallites average size. The bacterial adhesion and inactivation tests were carried in the dark and under light. Bacteria were seen to adhere on TiO-NTs in the dark; however, under light the bacteria were killed before they establish a strong contact with the TiO-NTs and Ag/TiO-NTs surfaces. Bacterial inactivation kinetics were faster when the anodizing potential of the NTs-preparation increases. A total bacterial inactivation was obtained on ∼100 nm nanotubes diameter within 90 min. This result was attributed to the enhancement of the TNTs crystallinity leading to reduced surface defects. Redox catalysis was seen to occur under light on the TiO-NTs and Ag/TiO-NTs. the photo-induced antibacterial activity on the AgO/AgO decorated TiO-NTs was attributed to the interfacial charge transfer mechanism (IFCT).

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Section: Accepted Manuscriptmentioning

confidence: 87%

Bacterial adhesion and inactivation on Ag decorated TiO2-nanotubes under visible light: Effect of the nanotubes geometry on the photocatalytic activity

Hajjaji

Elabidi

Trabelsi

et al. 2018

Colloids and Surfaces B: Biointerfaces

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“…The padded cotton fabrics were weighed to determine the wet pick up which was about 75-77%. 8 Na 2 CO 3 aqueous solution was thoroughly sprayed by conventional spraying method to neutralize the fabric surface. The coated photoactive cotton fabrics were heated in a preheated oven at 80 C for 5-8 min till complete drying.…”

Section: Coating Of Cotton Fabric With Rb-21/tio 2 Nano-solmentioning

confidence: 99%

“…Strong adhesive, photocatalytic, UV blocking and non-toxic properties of nanoscale titanium dioxide (TiO 2 ) make it the most promising material applied on the cotton fabrics for tailored properties. 8,9 Moreover, nanoscale TiO 2 can be prepared by the cheaper and environmentally friendly methods. Recently, the integration of UV protection and self-cleaning properties in the textile materials by photoactive TiO 2 coating has received extensive attention.…”

Section: Introductionmentioning

confidence: 99%

Photoactive cotton fabric for UV protection and self-cleaning

2019

Self Cite

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“…Organometallic dyes contain a transition metal in the structure and the organic dyes are composed of organic chromophores [187]. Ahmad and Kan [188] used a phthalocyanine-based reactive dye, C.I. reactive blue 25 (RB-25), as a dye photosensitizer for anatase (TiO2) and tested photocatalytic performance by degradation of Rhodamine B (RhB).…”

Section: Dye Photosensitizationmentioning

confidence: 99%

Impact of Titanium Dioxide (TiO2) Modification on Its Application to Pollution Treatment—A Review

Zhou

2020

Catalysts

167

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A high-efficiency method to deal with pollutants must be found because environmental problems are becoming more serious. Photocatalytic oxidation technology as the environmentally-friendly treatment method can completely oxidate organic pollutants into pollution-free small-molecule inorganic substances without causing secondary pollution. As a widely used photocatalyst, titanium dioxide (TiO2) can greatly improve the degradation efficiency of pollutants, but several problems are noted in its practical application. TiO2 modified by different materials has received extensive attention in the field of photocatalysis because of its excellent physical and chemical properties compared with pure TiO2. In this review, we discuss the use of different materials for TiO2 modification, highlighting recent developments in the synthesis and application of TiO2 composites using different materials. Materials discussed in the article can be divided into nonmetallic and metallic. Mechanisms of how to improve catalytic performance of TiO2 after modification are discussed, and the future development of modified TiO2 is prospected.

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Visible-Light-Driven, Dye-Sensitized TiO2 Photo-Catalyst for Self-Cleaning Cotton Fabrics

Cited by 38 publications

References 34 publications

Bacterial adhesion and inactivation on Ag decorated TiO2-nanotubes under visible light: Effect of the nanotubes geometry on the photocatalytic activity

Bacterial adhesion and inactivation on Ag decorated TiO2-nanotubes under visible light: Effect of the nanotubes geometry on the photocatalytic activity

Photoactive cotton fabric for UV protection and self-cleaning

Impact of Titanium Dioxide (TiO2) Modification on Its Application to Pollution Treatment—A Review

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