Anti-bacterial activity of indoor-light activated photocatalysts

Synnott, Damian W.; Seery, Michael K.; Hinder, Steven J.; Michlits, Georg; Pillai, Suresh C.

doi:10.1016/j.apcatb.2012.10.020

Cited by 52 publications

(19 citation statements)

References 48 publications

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“…32 The difference in the valence of the Zn 2+ and the In 3+ also leads to an increase in the number of sulfur vacancies, which act as stepping stones for the electrons travelling from the conduction band to the valence band. 33 This is incorporated in the supplementary information as Table 1. The silver has two roles in the system.…”

Section: Resultsmentioning

confidence: 99%

Novel microwave assisted synthesis of ZnS nanomaterials

Synnott

Seery²,

Hinder

et al. 2013

Nanotechnology

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A novel ambient pressure microwave-assisted technique is developed in which silver and indium modified ZnS is synthesised. The as prepared ZnS is characterised by X-ray diffraction, UV-Vis spectroscopy, X-ray photoelectron spectroscopy and luminescence spectroscopy. This procedure produced crystalline materials with particle sizes below 10 nm. The synthesis technique leads to defects in the crystal which induce mid energy levels in the band gap and lead to indoor light photocatalytic activity. Increasing the amount of silver causes a phase transition from cubic blende to hexagonal phase ZnS. In a comparative study, when the ZnS cubic blende is heated in a conventional chamber furnace, it is completely converted to ZnO at 600 °C. Both cubic blende and hexagonal ZnS show excellent photocatalytic activity under irradiation from a 60 watt light bulb. These ZnS samples also show significantly higher photocatalytic activity compared to the commercially available TiO 2 (Evonik-Degussa P-25).

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Section: Resultsmentioning

confidence: 99%

Novel microwave assisted synthesis of ZnS nanomaterials

Synnott

Seery²,

Hinder

et al. 2013

Nanotechnology

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“…The use of semiconductors as effective anti-bacterial materials has been greatly documented in the past [29,[172][173][174][175]. Here we discuss recent publications in the field which utilise visible light responsive titanium dioxide in order to make it a viable route for applications in industries such as environmental, hospital and wastewater treatment.…”

Section: Photocatalytic Anti-bacterial Actionmentioning

confidence: 99%

A review of solar and visible light active TiO2 photocatalysis for treating bacteria, cyanotoxins and contaminants of emerging concern

Fagan

McCormack

Dionysiou

et al. 2016

Materials Science in Semiconductor Processing

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515

195

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“…While we have reported the virucidal activity of photocatalysis for IFV [31] and bacteriophages [32,33], few studies have addressed viruses [34]. Recently non-TiO 2 photocatalysts (i.e., ZnO and ZnS) reported as significant progress archived in development were also observed their antimicrobial activity [35,36].…”

Section: Introductionmentioning

confidence: 99%

Broad Spectrum Microbicidal Activity of Photocatalysis by TiO2

et al. 2013

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Photocatalytically active titanium dioxide (TiO 2 ) is widely used as a self-cleaning and self-disinfecting material in many applications to keep environments biologically clean. Several studies on the inactivation of bacteria and viruses by photocatalytic reactions have also been reported; however, only few studies evaluated the spectrum of the microbicidal activity with photocatalysis for various species. There is a need to confirm the expected OPEN ACCESSCatalysts 2013, 3 311 effectiveness of disinfection by photocatalysis against multidrug-resistant bacteria and viruses. In this study, microbicidal activity of photocatalysis was evaluated by comparing the inactivation of various species of bacteria and viruses when their suspensions were dropped on the surface of TiO 2 -coated glass. Gram-positive bacteria, e.g., methicillin-resistant Staphylococcus aureus, vancomycin-resistant Enterococcus faecalis, and penicillin-resistant Streptococcus pneumoniae, were easily inactivated by photocatalysis, whereas some gram-negative bacteria, e.g., Escherichia coli and multidrug-resistant Pseudomonas aeruginosa, were gradually inactivated by photocatalysis. Influenza virus, an enveloped virus, was significantly inactivated by photocatalysis compared with feline calicivirus, a non-enveloped virus. The effectiveness of microbicidal activity by photocatalysis may depend on the surface structure. However, they are effectively inactivated by photocatalysis on the surface of TiO 2 -coated glass. Our data emphasize that effective cleaning and disinfection by photocatalysis in nosocomial settings prevents pathogen transmission.

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Anti-bacterial activity of indoor-light activated photocatalysts

Cited by 52 publications

References 48 publications

Novel microwave assisted synthesis of ZnS nanomaterials

Novel microwave assisted synthesis of ZnS nanomaterials

A review of solar and visible light active TiO2 photocatalysis for treating bacteria, cyanotoxins and contaminants of emerging concern

Broad Spectrum Microbicidal Activity of Photocatalysis by TiO2

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