Superior Antibacterial Activity of Fe3O4-TiO2 Nanosheets under Solar Light

2015 ◽  
Vol 7 (39) ◽  
pp. 21875-21883 ◽  
Author(s):  
Shuanglong Ma ◽  
Sihui Zhan ◽  
Yanan Jia ◽  
Qixing Zhou
Keyword(s):  
Antibacterial Activity ◽  
Solar Light ◽  
Tio2 Nanosheets

Uniform Gold-Nanoparticle-Decorated {001}-Faceted Anatase TiO2 Nanosheets for Enhanced Solar-Light Photocatalytic Reactions

2017 ◽  
Vol 9 (42) ◽  
pp. 36907-36916 ◽  
Author(s):  
Huimin Shi ◽  
Shi Zhang ◽  
Xupeng Zhu ◽  
Yu Liu ◽  
Tao Wang ◽  
...  
Keyword(s):  
Gold Nanoparticle ◽  
Anatase Tio2 ◽  
Solar Light ◽  
Tio2 Nanosheets ◽  
Photocatalytic Reactions

Solar-Light-Driven Photodegradation and Antibacterial Activity of Hierarchical TiO2/ZnO/CuO Material

ChemPlusChem ◽  
2012 ◽  
Vol 77 (10) ◽  
pp. 941-948 ◽  
Author(s):  
Hongwei Bai ◽  
Zhaoyang Liu ◽  
Darren Delai Sun
Keyword(s):  
Antibacterial Activity ◽  
Solar Light

Oxygen-defective MnO2/ZIF-8 nanorods with enhanced antibacterial activity under solar light

2021 ◽  
pp. 131349
Author(s):  
Zhenda Liang ◽  
Haiqing Wang ◽  
Kena Zhang ◽  
Ge Ma ◽  
Lishan Zhu ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Solar Light

scholarly journals Digitally Printed AgNPs Doped TiO2 on Commercial Porcelain-Grès Tiles: Synergistic Effects and Continuous Photocatalytic Antibacterial Activity

Surfaces ◽  
2020 ◽  
Vol 3 (1) ◽  
pp. 11-25 ◽  
Author(s):  
Claudia Letizia Bianchi ◽  
Giuseppina Cerrato ◽  
Bianca Maria Bresolin ◽  
Ridha Djellabi ◽  
Sami Rtimi
Keyword(s):  
Antibacterial Activity ◽  
Diffuse Reflectance Spectroscopy ◽  
Synergistic Effects ◽  
Light Response ◽  
Solar Light ◽  
Ceramic Tiles ◽  
Photocatalytic Ability ◽  
E Coli ◽  
Semiconductor Behavior ◽  
Tile Surface

In the present study, we use commercial digitally printed ceramic tiles, functionnalized by AgNPs doped micro–TiO2, to investigate the mechanism of Ag in the continouos photocatalytic antibacterial activity. The novelty of the research lies in the attempt to understand the mechanism of Ag, supported on TiO2, able to exhibit the same antibacterial activity of a standard system containing Ag species, but here, totally embedded on the tile surface, and thus not free to move and damage the bacteria cell. UV/vis diffuse reflectance spectroscopy (DRS) of AgNPs–TiO2 tiles indicated an enhanced visible light response, wherein a new absorption band was produced around 18,000–20,000 cm−1 (i.e., in the 400–600 nm range) owing to the surface plasmon resonance (SPR) of AgNPs. The antibacterial photocatalytic experiments were conducted towards the inactivation of E. coli under solar light and indoor light. It was found that the degradation speed of E. coli in the presence of AgNPs–TiO2 tiles is solar light-intensity depending. This justifies the semiconductor behavior of the material. Furthermore, the AgNPs–TiO2 tiles exhibit a high ability for the inactivation of E. coli at a high load (104–107 colony-forming unit (CFU)/mL). Additionally, AgNPs–TiO2 tiles showed a remarkable antibacterial activity under indoor light, which confirms the good photocatalytic ability of such tiles. On the basis of the reactive oxygen species (ROS) quenching experiments, O2•− species and h+ were more reactive for the inactivation of E. coli rather than •OH species. This is because of the different lifetime (bacteria are more likely oxidized by ROS with longer lifetime); in fact, O2•− and h+ exhibit a longer lifetime compared with •OH species. The generation of H2O2 as the most stable ROS molecule was also suggested.

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