Visible-light-driven photocatalytic bacterial inactivation and the mechanism of zinc oxysulfide under LED light irradiation

2016 ◽  
Vol 4 (3) ◽  
pp. 1052-1059 ◽  
Author(s):  
Dan Wu ◽  
Wei Wang ◽  
Tsz Wai Ng ◽  
Guocheng Huang ◽  
Dehua Xia ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Visible Light ◽  
Light Irradiation ◽  
Bacterial Inactivation ◽  
Led Light ◽  
Visible Light Driven ◽  
Zinc Oxysulfide ◽  
K 12 ◽  
First Time

Zinc oxysulfide (ZnO0.6S0.4) nanoparticles were prepared and used as an effective visible-light-driven (VLD) photocatalyst for the inactivation of Escherichia coli K-12 for the first time.

Visible-light-driven BiOBr nanosheets for highly facet-dependent photocatalytic inactivation of Escherichia coli

2015 ◽  
Vol 3 (29) ◽  
pp. 15148-15155 ◽  
Author(s):  
Dan Wu ◽  
Bo Wang ◽  
Wei Wang ◽  
Taicheng An ◽  
Guiying Li ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Visible Light ◽  
Photocatalytic Inactivation ◽  
Visible Light Driven ◽  
K 12 ◽  
Exposed Facets

The efficiency of photocatalytic inactivation towards Escherichia coli K-12 is highly dependent on the dominantly exposed facets of BiOBr.

Visible-light-driven inactivation of Escherichia coli K-12 over thermal treated natural pyrrhotite

2015 ◽  
Vol 176-177 ◽  
pp. 749-756 ◽  
Author(s):  
Dehua Xia ◽  
Yan Li ◽  
Guocheng Huang ◽  
Chi Ching Fong ◽  
Taicheng An ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Visible Light ◽  
Visible Light Driven ◽  
K 12

scholarly journals Templated Fabrication of Graphitic Carbon Nitride with Ordered Mesoporous Nanostructures for High-Efficient Photocatalytic Bacterial Inactivation under Visible Light Irradiation

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Jianqin Chen ◽  
Wenting Lin ◽  
Liyan Xie ◽  
Jianhui Huang ◽  
Wanjun Wang
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Light Irradiation ◽  
Graphitic Carbon Nitride ◽  
Bacterial Inactivation ◽  
Ordered Mesoporous ◽  
K 12 ◽  
Mesoporous Nanostructures

Biohazards are widely present in water, and a variety of waterborne diseases can be aroused by contaminated water. Therefore, the effective removal of biological hazards from water is necessary for the protection of human health. In this study, graphitic carbon nitride (g-C3N4) with ordered mesoporous nanostructures was successfully synthesized by a template method using SBA-15 as a hard template. The morphology, crystal structure, specific surface area, molecular structure, and light absorption properties of the as-prepared sample were characterized by TEM, XRD, BET, FT-IR, and UV-Vis DRS, respectively. The photocatalytic performance of the ordered mesoporous g-C3N4 was evaluated by the inactivation of Escherichia coli K-12 in water under visible light irradiation. Results showed that the bacterial inactivation efficiency can reach as high as 99% within 2 h of VL irradiation, which is 4 times higher than that of bulk g-C3N4. Moreover, the photocatalytic bacterial inactivation mechanism was revealed by a scavenging study, and the main active species in the photocatalytic inactivation process was found to be a photogenerated hole. This work will provide useful information for the development of new efficient g-C3N4-based materials for enhanced water disinfection applications by introducing ordered mesoporous nanostructures in a photocatalyst design and fabrication.

Cu Doped TiO2: Visible Light Assisted Photocatalytic Antimicrobial Activity and High Temperature Anatase Stability

2018 ◽  
Author(s):  
Snehamol Mathew ◽  
Priyanka Ganguly ◽  
Stephen Rhatigan ◽  
Vignesh Kumaravel ◽  
Ciara Byrne ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Density Functional ◽  
Anatase Phase ◽  
Sol Gel ◽  
Chemical Properties ◽  
Light Irradiation ◽  
Health Concern ◽  
Bacterial Inactivation ◽  
X Ray

Indoor surface contamination by microbes is a major public health concern. A damp environment is one potential sources for microbe proliferation. Smart photocatalytic coatings on building surfaces using semiconductors like titania (TiO<sub>2</sub>) can effectively curb this growing threat.<b> </b>Metal-doped titania in anatase phase has been proved as a promising candidate for energy and environmental applications. In this present work, the antimicrobial efficacy of copper (Cu) doped TiO<sub>2 </sub>(Cu-TiO<sub>2</sub>) was evaluated against <i>Escherichia coli</i> (Gram-negative) and <i>Staphylococcus aureus</i> (Gram-positive) under visible light irradiation. Doping of a minute fraction of Cu (0.5 mol %) in TiO<sub>2 </sub>was carried out <i>via</i> sol-gel technique. Cu-TiO<sub>2</sub> further calcined at various temperatures (in the range of 500 °C – 700 °C) to evaluate the thermal stability of TiO<sub>2</sub> anatase phase. The physico-chemical properties of the samples were characterised 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 TiO<sub>2</sub> was maintained well, up to 650 °C, by the Cu dopant. UV-DRS results suggested that the visible light absorption property of Cu-TiO<sub>2 </sub>was enhanced and the band gap is reduced to 2.8 eV. Density functional theory (DFT) studies emphasises the introduction of Cu<sup>+</sup> and Cu<sup>2+</sup> ions by replacing Ti<sup>4+</sup> ions in the TiO<sub>2</sub> lattice, creating oxygen vacancies. These further promoted the photocatalytic efficiency. A significantly high bacterial inactivation (99.9%) was attained in 30 mins of visible light irradiation by Cu-TiO<sub>2</sub>.

Highly efficient adhesion and inactivation of Escherichia coli on visible-light-driven amino-functionalized BiOBr hybrids

2021 ◽  
Vol 193 ◽  
pp. 110570
Author(s):  
Dan Wu ◽  
Tsz Ho Tsang ◽  
Ho Yin Yip ◽  
Wei Wang ◽  
Po Keung Wong
Keyword(s):  
Escherichia Coli ◽  
Visible Light ◽  
Highly Efficient ◽  
Visible Light Driven

Visible light-driven novel g-C3N4/NiFe-LDH composite photocatalyst with enhanced photocatalytic activity towards water oxidation and reduction reaction

2015 ◽  
Vol 3 (36) ◽  
pp. 18622-18635 ◽  
Author(s):  
Susanginee Nayak ◽  
Lagnamayee Mohapatra ◽  
Kulamani Parida
Keyword(s):  
Photocatalytic Activity ◽  
Composite Materials ◽  
Visible Light ◽  
Water Splitting ◽  
Visible Light Irradiation ◽  
Water Oxidation ◽  
Reduction Reaction ◽  
Light Irradiation ◽  
Composite Photocatalyst ◽  
Visible Light Driven

Dispersion of exfoliated CN over the surface of exfoliated LDH composite materials, and its photocatalytic water splitting under visible-light irradiation.

Solvothermal synthesis and visible light-driven photocatalytic degradation for tetracycline of Fe-doped SrTiO3

RSC Advances ◽  
2014 ◽  
Vol 4 (88) ◽  
pp. 47615-47624 ◽  
Author(s):  
Ping Li ◽  
Chunbo Liu ◽  
Guoling Wu ◽  
Yang Heng ◽  
Shuang Lin ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Solvothermal Synthesis ◽  
Solvothermal Method ◽  
Light Irradiation ◽  
Photocatalytic Activities ◽  
Visible Light Driven ◽  
Facile Solvothermal Method

In this paper, Fe-doped SrTiO3 (FSTO) photocatalysts were successfully prepared via a facile solvothermal method, and their photocatalytic activities for degrading tetracycline (TC) under visible light irradiation were examined.

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