scholarly journals Rutile TiO2 films with 100% exposed pyramid-shaped (111) surface: photoelectron transport properties under UV and visible light irradiation

2013 ◽  
Vol 1 (7) ◽  
pp. 2646 ◽  
Author(s):  
Haimin Zhang ◽  
Xiaolu Liu ◽  
Yun Wang ◽  
Porun Liu ◽  
Weiping Cai ◽  
...  
Keyword(s):  
Visible Light ◽  
Transport Properties ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Tio2 Films ◽  
Rutile Tio2

scholarly journals Floating Carbon-Doped TiO2 Photocatalyst with Metallic Underlayers Investigation for Polluted Water Treatment under Visible-Light Irradiation

Catalysts ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1454
Author(s):  
Sarunas Varnagiris ◽  
Marius Urbonavičius ◽  
Sandra Sakalauskaitė ◽  
Emilija Demikyte ◽  
Simona Tuckute
Keyword(s):  
Visible Light ◽  
Salmonella Typhimurium ◽  
Membrane Permeability ◽  
Tio2 Film ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Tio2 Films ◽  
Tio2 Photocatalyst ◽  
Doped Tio2 ◽  
Carbon Doped

In the current study, we analysed the influence of metallic underlayers on carbon-doped TiO2 films for RhB decomposition and Salmonella typhimurium inactivation under visible-light irradiation. All the experiments were divided into two parts. First, layered M/C-doped-TiO2 film structures (M = Ni, Nb, Cu) were prepared by magnetron sputtering technique on borosilicate glass substrates in the two-step deposition process. The influence of metal underlayer on the formation of the carbon-doped TiO2 films was characterised by X-ray diffractometer, scanning electron microscope, and atomic force microscope. The comparison between the visible-light assisted photocatalytic activity of M/C-doped TiO2 structures was performed by the photocatalytic bleaching tests of Rhodamine B dye aqueous solution. The best photocatalytic performance was observed for Ni/C-doped-TiO2 film combination. During the second part of the study, the Ni/C-doped-TiO2 film combination was deposited on high-density polyethylene beads which were selected as a floating substrate. The morphology and surface chemical analyses of the floating photocatalyst were performed. The viability and membrane permeability of Salmonella typhimurium were tested in cycling experiments under UV-B and visible-light irradiation. Three consecutive photocatalytic treatments of fresh bacteria suspensions with the same set of floating photocatalyst showed promising results, as after the third 1 h-long treatment bacteria viability was still reduced by 90% and 50% for UV-B and visible-light irradiation, respectively. The membrane permeability and ethidium fluorescence results suggest that Ni underlayer might have direct and indirect effect on the bacteria inactivation process. Additionally, relatively low loss of the photocatalyst efficiency suggests that floating C-doped TiO2 photocatalyst with the Ni underlayer might be seen as the possible solution for the used photocatalyst recovery issue.

Photo-induced monomer/dimer kinetics in methylene blue degradation over doped and phase controlled nano-TiO2 films

RSC Advances ◽  
2016 ◽  
Vol 6 (49) ◽  
pp. 43563-43573 ◽  
Author(s):  
K. Murugan ◽  
J. Joardar ◽  
A. S. Gandhi ◽  
B. S. Murty ◽  
P. H. Borse
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Tio2 Films ◽  
Nano Tio2 ◽  
Methylene Blue Degradation

Schematic showing efficient MB degradation under visible light irradiation via the monomer and dimer.

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