Cu0- doped TiO2 nanofibers as potential photocatalyst and antimicrobial agent

Yousef, Ayman; El-Halwany, M.M.; Barakat, Nasser A.M.; Al-Maghrabi, Mohammednoor N.; Kim, Hee Young

doi:10.1016/j.jiec.2014.11.036

Cited by 38 publications

(17 citation statements)

References 55 publications

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“…In contrast, hydroxyl groups were not additionally formed on OAPs modified with Ag and Cu, since oxygen formed metallic oxides on the surface of these less noble metals. Deconvolution of Pt [76] , [77] , [78] , Au [71] , Cu [68] , [79] and Ag [67] , [68] , [71] peaks confirmed that metal deposition under anaerobic conditions resulted in the formation of mainly zero-charged Au and Pt (ca. 90% and 61%, respectively) deposits and oxidized forms of Ag and Cu ( Table 2 ).…”

Section: Resultsmentioning

confidence: 88%

Noble metal-modified octahedral anatase titania particles with enhanced activity for decomposition of chemical and microbiological pollutants

Wei

Endo

Wang

et al. 2017

Chemical Engineering Journal

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Section: Resultsmentioning

confidence: 88%

Noble metal-modified octahedral anatase titania particles with enhanced activity for decomposition of chemical and microbiological pollutants

Wei

Endo

Wang

et al. 2017

Chemical Engineering Journal

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“…The doped sample calcined at 600 • C displayed high photocatalytic activity for phenol degradation [32]. Several studies demonstrating the photocatalytic anti-bacterial efficiency were also reported (Table S1) [33][34][35][36][37][38][39][40]. However, in most of the cases, a high concentration of Cu was used to display the antimicrobial activity and did not study the effect of calcination temperature.…”

Section: Introductionmentioning

confidence: 99%

Cu-Doped TiO2: Visible Light Assisted Photocatalytic Antimicrobial Activity

et al. 2018

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Surface contamination by microbes is a major public health concern. A damp environment is one of potential sources for microbe proliferation. Smart photocatalytic coatings on building surfaces using semiconductors like titania (TiO2) can effectively curb this growing threat. Metal-doped titania in anatase phase has been proven as a promising candidate for energy and environmental applications. In this present work, the antimicrobial efficacy of copper (Cu)-doped TiO2 (Cu-TiO2) was evaluated against Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive) under visible light irradiation. Doping of a minute fraction of Cu (0.5 mol %) in TiO2 was carried out via sol-gel technique. Cu-TiO2 further calcined at various temperatures (in the range of 500–700 °C) to evaluate the thermal stability of TiO2 anatase phase. The physico-chemical properties of the samples were characterized through X-ray diffraction (XRD), Raman spectroscopy, X-ray photo-electron spectroscopy (XPS) and UV–visible spectroscopy techniques. XRD results revealed that the anatase phase of TiO2 was maintained well, up to 650 °C, by the Cu dopant. UV–vis results suggested that the visible light absorption property of Cu-TiO2 was enhanced and the band gap is reduced to 2.8 eV. Density functional theory (DFT) studies emphasize the introduction of Cu+ and Cu2+ ions by replacing Ti4+ ions in the TiO2 lattice, creating oxygen vacancies. These further promoted the photocatalytic efficiency. A significantly high bacterial inactivation (99.9999%) was attained in 30 min of visible light irradiation by Cu-TiO2.

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“…The antibacterial activity was tested using E. coli and K. pneumoniae as model organism and were able to degrade dyes in solution besides bacterial inactivation. 132,133 With the same purpose, nanosilver-decorated titanium TiO 2 nanofibers were prepared with photochemical and antimicrobial activity using a sol-gel-electrospinning process followed by calcination at 400 C with silver particles deposited via photoreduction decorating the outer surface. The authors demonstrated that the inclusion of silver not only introduces antimicrobial activity against S. aureus and E. coli, but increases photocatalytic efficiency via reducing electron hole recombination rate.…”

Section: Filters For Environmental Applicationsmentioning

confidence: 99%

Bioactive Applications for Electrospun Fibers

2016

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Electrospinning is a versatile technique providing highly tunable nanofibrous nonwovens. Many biomedical applications have been developed for nanofibers, among which the production of antimicrobial mats stands out. The production of scaffolds for tissue engineering, fibers for controlled drug release, or active wound dressings are active fields of research exploiting the possibilities offered by electrospun materials. The fabrication of materials for active food packaging or membranes for environmental applications is also reviewed. We attempted to give an overview of the most recent literature related with applications in which nanofibers get in contact with living cells and develop a nano-bio interface.

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Cu0- doped TiO2 nanofibers as potential photocatalyst and antimicrobial agent

Cited by 38 publications

References 55 publications

Noble metal-modified octahedral anatase titania particles with enhanced activity for decomposition of chemical and microbiological pollutants

Noble metal-modified octahedral anatase titania particles with enhanced activity for decomposition of chemical and microbiological pollutants

Cu-Doped TiO2: Visible Light Assisted Photocatalytic Antimicrobial Activity

Bioactive Applications for Electrospun Fibers

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