Supported silver nanoparticles as photocatalysts under ultraviolet and visible light irradiation

2010 ◽  
Vol 12 (3) ◽  
pp. 414 ◽  
Author(s):  
Xi Chen ◽  
Zhanfeng Zheng ◽  
Xuebin Ke ◽  
Esa Jaatinen ◽  
Tengfeng Xie ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation

Deposition of silver nanoparticles onto two dimensional BiOCl nanodiscs for enhanced visible light photocatalytic and biocidal activities

RSC Advances ◽  
2016 ◽  
Vol 6 (69) ◽  
pp. 64911-64920 ◽  
Author(s):  
Wenyu Zhu ◽  
Zhong Li ◽  
Yan Zhou ◽  
Xiaoli Yan
Keyword(s):  
Silver Nanoparticles ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Photocatalytic Performance ◽  
Light Irradiation ◽  
Two Dimensional ◽  
Antibacterial Efficiency ◽  
Visible Light Photocatalytic

Silver modified 2D BiOCl showed excellent photocatalytic performance in degrading sulfanilamide and presented good antibacterial efficiency under visible light irradiation.

Phytosynthesis of silver nanoparticles using rhizome extract of Alpinia officinarum and their photocatalytic removal of dye under UV and visible light irradiation

Optik ◽  
2020 ◽  
Vol 208 ◽  
pp. 164521 ◽  
Author(s):  
Jin Feng Li ◽  
Ying-Chun Liu ◽  
Mohan Chokkalingam ◽  
Esrat Jahan Rupa ◽  
Ramya Mathiyalagan ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Alpinia Officinarum ◽  
Photocatalytic Removal

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>.

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