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

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

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.

Biosynthesized TiO2 nanoparticles an efficient biogenic material for photocatalytic and antibacterial applications

2021 ◽  
pp. 0958305X2110002
Author(s):  
Nagalakshmi Meenatchisundaram ◽  
Jeganathan Chellamuthu ◽  
Anandha Raj Jeyaraman ◽  
Nithya Arjunan ◽  
Jothi Basu Muthuramalingam ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Antibacterial Activity ◽  
Diffuse Reflectance Spectroscopy ◽  
Group Analysis ◽  
Light Irradiation ◽  
Solar Light ◽  
Morphological Properties ◽  
Blue Dye ◽  
X Ray ◽  
Solar Light Irradiation

A simple one-step biosynthesis route has been adopted for the synthesis of high crystalline phase pure anatase TiO2 nanoparticles. The structural conformation and functional group analysis of the synthesized nanoparticles were made through X-Ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR), respectively. The optical property and the band gap were estimated by using UV-Visible diffuse reflectance spectroscopy (UV-DRS). The surface morphological properties of the anatase TiO2 nanoparticles were confirmed using Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) and the size of the synthesized nanoparticles are 8 nm. The element analysis was evaluated by using EDS and X-ray photoelectron spectroscopy (XPS). The photocatalytic activity of the prepared sample was investigated by the decolourization of Methylene blue dye under UV and solar light irradiation. The maximum dye removal efficiency of 99.2% was observed for solar light irradiation. Besides, the prepared samples also exhibit excellent antibacterial activity against Klebsilla Pneumoniae and Streptococcus Pneumoniae. The antibacterial activity for the synthesized TiO2 nanoparticles show maximum zone of inhibition (23.5 mm). Thus, the biogenic property of the bioprocessed TiO2 nanoparticles is a potential material for environmental and biomedical applications. [Formula: see text]

Dual-sensitized upconversion-assisted, triple-band absorbing luminescent solar concentrators

Nanoscale ◽  
2020 ◽  
Vol 12 (33) ◽  
pp. 17265-17271
Author(s):  
Seong Kyung Nam ◽  
Kiwon Kim ◽  
Ji-Hwan Kang ◽  
Jun Hyuk Moon
Keyword(s):  
Solar Light ◽  
Photovoltaic Systems ◽  
Solar Concentrator ◽  
Solar Concentrators ◽  
Luminescent Solar Concentrators ◽  
Luminescent Solar Concentrator ◽  
Triple Band

Luminescent solar concentrator-photovoltaic systems (LSC-PV) harvest solar light by using transparent photoluminescent plates, which is expected to be particularly useful for building-integrated PV applications.

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