Antibacterial properties of F-doped ZnO visible light photocatalyst

Podporska-Carroll, Joanna; Myles, Adam; Quilty, Bríd; McCormack, Declan E.; Fagan, Rachel; Hinder, Steven J.; Dionysiou, Dionysios D.; Pillai, Suresh C.

doi:10.1016/j.jhazmat.2015.12.038

Cited by 208 publications

(58 citation statements)

References 62 publications

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“…As described in the Fig. 7, the antibacterial mechanism of Ag/TiO 2 /PDA nanofilm showed that Ag/TiO 2 /PDA nanofilm generated highly ROS after visible light irradiation [47][48][49]. The presence of the ROS with hydroxyl groups leads to cell inactivation through oxidative damage of the cell membrane or by the penetration of superoxide anions and hydrogen peroxide into the cells [50].…”

Section: Antibacterial Activity Of Ag/tio 2 /Pda Nanofilm Under Visibmentioning

confidence: 95%

“…The contribution of PDA nanofilm as plausible support to the photocatalytic mechanism is confirmed by the efficient electron transfer process. Subsequently, some ROS such as hydroxyl radical, hydrogen peroxide, and superoxides are generated, which can destroy the cell wall and membrane of bacterial cell, causing immediate bacterial inactivation [47][48][49].…”

Section: Evaluation Of Photoelectrochemical Propertiesmentioning

confidence: 99%

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Antibacterial properties of Ag/TiO2/PDA nanofilm on anodized 316L stainless steel substrate under illumination by a normal flashlight

Liu

et al. 2020

J Mater Sci

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The demand of medical materials for rapid and efficient elimination of bacteria has seen a dramatic surge over the past few years. In this study, antibacterial nanofilms with reactive oxygen species were generated by photocatalysis. To prepare these nanofilms, Ag and amorphous TiO 2 nanoparticles decorated on polydopamine (PDA) were coated on three-dimensional (3D) nanopore arrays, which was fabricated on a substrate of anodized stainless steel. All the antibacterial tests were conducted with a household flashlight, which may be considered as a practical approach for antibacterial materials. The photoelectrochemical property of the 3D Ag/TiO 2 /PDA nanofilm on 316L stainless steel (Ag/TiO 2 /PDA SS) was about 15 times higher than that of the annealed Ag/ TiO 2 /PDA SS, and consequently, it exhibited higher antibacterial activity. The enhanced photoelectrochemical property is attributed to the successful separation of electrons (amorphous TiO 2 ) and holes (Ag nanoparticles). Further, when a plate containing 3D Ag/TiO 2 /PDA SS was irradiated with visible light just for 10 min, it immediately destroyed the bacteria in 10 6 CFU/mL without any bacterial colony. After five weeks, there were still no bacterial colonies in the plate corresponding to Ag/TiO 2 /PDA SS under visible light, while Ag/TiO 2 / PDA SS in dark had a negligible effect on the bacteria, i.e., the antibacterial mechanism through direct contact and ion dissolution was not efficient. The excellent antibacterial properties of 3D Ag/TiO 2 /PDA SS illuminated by flashlight provides an efficient, facile, and cost-effective technique for the development of antibacterial medical materials to meet the increasing demand of eliminating bacterial infections.

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Section: Antibacterial Activity Of Ag/tio 2 /Pda Nanofilm Under Visibmentioning

confidence: 95%

Section: Evaluation Of Photoelectrochemical Propertiesmentioning

confidence: 99%

Antibacterial properties of Ag/TiO2/PDA nanofilm on anodized 316L stainless steel substrate under illumination by a normal flashlight

Liu

et al. 2020

J Mater Sci

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“…For instance, ZnO NPs doped with fluorine generate more ROS than ZnO NPs, resulting in greater damage to bacterial cells. 164,165 The O content at the surface of the ZnO NPs is the key factor regulating antimicrobial effectiveness against both Gram-negative and Gram-positive bacteria. 166 Nano-TiO 2 is widely applied in orthopedic and dental implants, which have antibacterial activity that can reduce the formation of biofilms.…”

Section: Doping Modificationmentioning

confidence: 99%

The antimicrobial activity of nanoparticles: present situation and prospects for the future

Wang¹,

Hu²,

Shao³

2017

IJN

3,034

1,792

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Nanoparticles (NPs) are increasingly used to target bacteria as an alternative to antibiotics. Nanotechnology may be particularly advantageous in treating bacterial infections. Examples include the utilization of NPs in antibacterial coatings for implantable devices and medicinal materials to prevent infection and promote wound healing, in antibiotic delivery systems to treat disease, in bacterial detection systems to generate microbial diagnostics, and in antibacterial vaccines to control bacterial infections. The antibacterial mechanisms of NPs are poorly understood, but the currently accepted mechanisms include oxidative stress induction, metal ion release, and non-oxidative mechanisms. The multiple simultaneous mechanisms of action against microbes would require multiple simultaneous gene mutations in the same bacterial cell for antibacterial resistance to develop; therefore, it is difficult for bacterial cells to become resistant to NPs. In this review, we discuss the antibacterial mechanisms of NPs against bacteria and the factors that are involved. The limitations of current research are also discussed.

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“…Depending upon the level and positions of these centers, ZnO is able to emit light in various colors such as violet, blue, green, yellow, orange and red [3,4]. Because of these remarkable * E-mail: 123105005 aibhav@manit.ac.in and peculiar properties, ZnO has a wide range of applications in the areas ranging from photovoltaic [5] to photocatalyst [6,7], from electronics [2] to medical sciences [2,7] and from cosmetics [5] to antibacterial applications [6].…”

Section: Introductionmentioning

confidence: 99%

“…Intensive studies have been done on various factors, such as precursor concentrations [8,9], temperature [10,11], duration [12], surfactant concentration [7], dopant concentration [6], solvent medium [13], pH of reaction mixture [14] and source of light during synthesis [15], which individually and collectively affect the shape, size and optical properties of ZnO. Various researchers [16][17][18] suggested that NaOH concentration plays a vital role in determining the morphology, size and optical bandgap of obtained nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Effect of NaOH concentration on optical properties of zinc oxide nanoparticles

Koutu

Shastri

Malik

2016

Materials Science-Poland

107

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In the present work, powder zinc oxide samples were prepared by varying NaOH concentration (0.1 M -0.4 M) using wet-chemical co-precipitation method. As-synthesized ZnO was characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), photoluminescence (PL) and Raman spectroscopy. Formation of hexagonal wurtzite structure of the ZnO samples has been revealed from XRD studies. This study further suggests reduction in crystallite size from 40 nm to 23 nm with an increase in NaOH concentration which is confirmed by FESEM. PL and Raman spectroscopy studies of these samples show significant peak shift towards the higher and lower energy respectively, with maximum PL emission between 400 nm and 470 nm region of the visible spectrum. Noticeable inverse relationship between optical properties of ZnO nanoparticles and NaOH concentration may be attributed to the rapid nucleation during the synthesis process. With these remarkable properties, ZnO nanoparticles may find applications in nanoelectronic devices, sensors, nanomedicine, GATE dielectrics, photovoltaic devices, etc.

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Antibacterial properties of F-doped ZnO visible light photocatalyst

Cited by 208 publications

References 62 publications

Antibacterial properties of Ag/TiO2/PDA nanofilm on anodized 316L stainless steel substrate under illumination by a normal flashlight

Antibacterial properties of Ag/TiO2/PDA nanofilm on anodized 316L stainless steel substrate under illumination by a normal flashlight

The antimicrobial activity of nanoparticles: present situation and prospects for the future

Effect of NaOH concentration on optical properties of zinc oxide nanoparticles

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