Carbon-doped TiO2 nanoparticles wrapped with nanographene as a high performance photocatalyst for phenol degradation under visible light irradiation

2014 ◽  
Vol 144 ◽  
pp. 893-899 ◽  
Author(s):  
Sungju Yu ◽  
Hyeong Jin Yun ◽  
Yong Hwa Kim ◽  
Jongheop Yi
Keyword(s):  
Visible Light ◽  
Tio2 Nanoparticles ◽  
Visible Light Irradiation ◽  
High Performance ◽  
Phenol Degradation ◽  
Light Irradiation ◽  
Doped Tio2 ◽  
Carbon Doped

Hydrogen production from organic fatty acids using carbon-doped TiO2 nanoparticles under visible light irradiation

2018 ◽  
Vol 43 (9) ◽  
pp. 4335-4346 ◽  
Author(s):  
Yang Li ◽  
Liyuan Kuang ◽  
Dequan Xiao ◽  
Appala Raju Badireddy ◽  
Maocong Hu ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Hydrogen Production ◽  
Visible Light ◽  
Tio2 Nanoparticles ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Doped Tio2 ◽  
Carbon Doped

scholarly journals Enhanced Photocatalytic Properties of PET Filaments Coated with Ag-N Co-Doped TiO2 Nanoparticles Sensitized with Disperse Blue Dyes

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 987 ◽  
Author(s):  
Hui Zhang ◽  
Qi Tang ◽  
Qingshan Li ◽  
Qingwen Song ◽  
Hailiang Wu ◽  
...  
Keyword(s):  
Visible Light ◽  
Tio2 Nanoparticles ◽  
Visible Light Irradiation ◽  
Reaction Rate Constant ◽  
Light Irradiation ◽  
Photocatalytic Properties ◽  
Blue Dye ◽  
Dye Sensitization ◽  
Doped Tio2 ◽  
Co Doped

In this study, the effects of disperse blue dye-sensitization on the photocatalytic properties of the Ag-N co-doped TiO2 nanoparticles loaded on polyethylene terephthalate (PET) filaments are investigated under visible light irradiation. The microstructure and photocatalytic properties of the as-synthesized TiO2 nanocomposites, as well as the as-prepared PET filaments, are systematically characterized. The photocatalytic performance of the PET filaments coated with the Ag-N co-doped TiO2 nanoparticles sensitized with disperse blue dyes is evaluated via its capacity of photo-degrading methyl orange (MO) dyes under visible light irradiation. It is found that the holes are the predominant reactive radical species and the hydroxyl and superoxide radicals play a subordinate role in the photocatalytic reaction process. The reaction rate constant of the photocatalytic composite filaments is nearly 4.0 times higher than that of the PET filaments loaded solely with TiO2 nanoparticles. The resultant photocatalytic composite filaments are evident to be capable of repeatedly photo-degrading MO dyes without losing its photocatalytic activity significantly.

scholarly journals Development of Smart Composites Based on Doped-TiO2 Nanoparticles with Visible Light Anticancer Properties

Materials ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 2589 ◽  
Author(s):  
Evdokia Galata ◽  
Eleni A. Georgakopoulou ◽  
Maria-Emmanouela Kassalia ◽  
Nefeli Papadopoulou-Fermeli ◽  
Evangelia A. Pavlatou
Keyword(s):  
Visible Light ◽  
Tio2 Nanoparticles ◽  
Visible Light Irradiation ◽  
Sol Gel ◽  
Ultra Violet ◽  
Light Irradiation ◽  
Composite Particles ◽  
Doped Tio2 ◽  
X Ray ◽  
Anticancer Properties

In this study, the synthesis of smart, polymerically embedded titanium dioxide (TiO2) nanoparticles aimed to exhibit photo-induced anticancer properties under visible light irradiation is investigated. The TiO2 nanoparticles were prepared by utilizing the sol gel method with different dopants, including nitrogen (N-doped), iron (Fe-doped), and nitrogen and iron (Fe,N-doped). The dopants were embedded in an interpenetrating (IP) network microgel synthesized by stimuli responsive poly (N-Isopropylacrylamide-co-polyacrylicacid)–pNipam-co-PAA forming composite particles. All the types of produced particles were characterized by X-ray powder diffraction, micro-Raman, Fourier-transform infrared, X-ray photoelectron, ultra-violet-visible spectroscopy, Field Emission Scanning Electron, Transmission Electron microscopy, and Dynamic Light Scattering techniques. The experimental findings indicate that the doped TiO2 nanoparticles were successfully embedded in the microgel. The N-doped TiO2 nano-powders and composite particles exhibit the best photocatalytic degradation of the pollutant methylene blue under visible light irradiation. Similarly, the highly malignant MDA-MB-231 breast cancer epithelial cells were susceptible to the inhibition of cell proliferation at visible light, especially in the presence of N-doped powders and composites, compared to the non-metastatic MCF-7 cells, which were not affected.

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.

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