A theoretical and experimental formalism of electronic structure of BFO:Cr thin films and modulation of their electrical properties upon visible light illumination

2018 ◽  
Vol 124 (15) ◽  
pp. 155304 ◽  
Author(s):  
Shaan Ameer ◽  
Kajal Jindal ◽  
Monika Tomar ◽  
Ashok Kumar ◽  
Pradip K. Jha ◽  
...  
Keyword(s):  
Thin Films ◽  
Electronic Structure ◽  
Electrical Properties ◽  
Visible Light ◽  
Light Illumination ◽  
Visible Light Illumination

scholarly journals Electrical investigation of TiO2 thin films coated on glass and silicon substrates—effect of UV and visible light illumination

2015 ◽  
Vol 6 (4) ◽  
pp. 591-598 ◽  
Author(s):  
Saranya Amirtharajan ◽  
Pandiarajan Jeyaprakash ◽  
Jeyakumaran Natarajan ◽  
Prithivikumaran Natarajan
Keyword(s):  
Thin Films ◽  
Visible Light ◽  
Silicon Substrates ◽  
Light Illumination ◽  
Tio2 Thin Films ◽  
Electrical Investigation ◽  
Visible Light Illumination

A facile solution approach to W,N co-doped TiO2 nanobelt thin films with high photocatalytic activity

2015 ◽  
Vol 3 (31) ◽  
pp. 15863-15868 ◽  
Author(s):  
Lu-Lu Lai ◽  
Jin-Ming Wu
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
High Photocatalytic Activity ◽  
Light Illumination ◽  
Direct Oxidation ◽  
Solution Approach ◽  
Visible Light Illumination ◽  
Subsequent Calcination ◽  
Co Doped

W,N co-doped anatase TiO2 nanobelt films were synthesized by direct oxidation of metallic Ti substrates with H2O2 solutions containing H2WO4 and C3H6N6 at 80 °C, followed by a subsequent calcination. The photocatalytic activity of the W,N co-doped anatase TiO2 nanobelt films was nearly three times that of undoped alkali-hydrothermal synthesized anatase TiO2 nanobelt films, under UV and visible light illumination.

scholarly journals Sulfur-, nitrogen- and platinum-doped titania thin films with high catalytic efficiency under visible-light illumination

2018 ◽  
Vol 9 ◽  
pp. 1629-1640 ◽  
Author(s):  
Boštjan Žener ◽  
Lev Matoh ◽  
Giorgio Carraro ◽  
Bojan Miljević ◽  
Romana Cerc Korošec
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Sol Gel ◽  
Catalytic Efficiency ◽  
Dip Coating ◽  
Light Illumination ◽  
Organic Pigment ◽  
Visible Light Illumination ◽  
Doped Titania

Titanium dioxide photocatalysts have received a lot of attention during the past decades due to their ability to degrade various organic pollutants to CO2 and H2O, which makes them suitable for use in environmental related fields such as air and water treatment and self-cleaning surfaces. In this work, titania thin films and powders were prepared by a particulate sol–gel route, using titanium tetrachloride (TiCl4) as a precursor. Afterwards, the prepared sols were doped with nitrogen (ammonium nitrate, urea), sulfur (thiourea) and platinum (chloroplatinic acid), coated onto glass substrates by dip-coating, and thermally treated in a muffle furnace to promote crystallization. The resulting thin films were then characterized by various techniques (i.e., TGA-DSC-MS, XRD, BET, XPS, SEM, band gap measurements). The photocatalytic activity of the prepared thin films was determined by measuring the degradation rate of plasmocorinth B (PB), an organic pigment used in the textile industry, which can pose an environmental risk when expelled into wastewater. A kinetic model for adsorption and subsequent degradation was used to fit the experimental data. The results have shown an increase in photocatalytic activity under visible-light illumination of nonmetal and metal doped and co-doped titania thin films compared to an undoped sample.

scholarly journals Bandgap Tailored TiO2 Thin Films by Addition of SiO2 for Enhanced Photocatalytic Activity against Congo Red under Visible Light Illumination

2017 ◽  
Vol 29 (5) ◽  
pp. 1085-1090
Author(s):  
M. Sankareswari ◽  
R. Vidhya ◽  
P. Malliga ◽  
I. Rathinamala ◽  
S. Karuthapandian ◽  
...  
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Congo Red ◽  
Light Illumination ◽  
Tio2 Thin Films ◽  
Visible Light Illumination

Visible-Light Inactivation of Escherichia Coli on N-Doped Titanium Oxide Thin Films

2006 ◽  
Vol 930 ◽  
Author(s):  
Pinggui Wu ◽  
JianKu Shang
Keyword(s):  
Thin Films ◽  
Escherichia Coli ◽  
Visible Light ◽  
Titanium Oxide ◽  
Nitrogen Concentration ◽  
Clear Correlation ◽  
Light Illumination ◽  
Bacterial Killing ◽  
Visible Light Illumination ◽  
Nitrogen Concentrations

AbstractAntimicrobial behavior of nitrogen-doped titanium dioxide (TiON) thin films was examined by cell viability assays under visible light illumination, using Escherichia coli as the indicator. The nitrogen doping was found to enable visible-light inactivation of Escherichia coli on titanium oxide films. At a light intensity of 1.6 mW/cm2, TiON films reached a bacterial killing rate of about 50% in half an hour, comparable to those reported for ultraviolet light irradiated TiO2. In the range of nitrogen concentrations from 0.2 to 0.9, the bacterial killing rates showed no clear correlation with the nitrogen concentration for the TiON films.

Photoelectrocatalytic Oxidation of Organics Under Visible Light Illumination: A Short Review

2015 ◽  
Vol 19 (6) ◽  
pp. 512-520 ◽  
Author(s):  
Nikolaos Karanasios ◽  
Jenia Georgieva ◽  
Eugenia Valova ◽  
Stephan Armyanov ◽  
Georgios Litsardakis ◽  
...  
Keyword(s):  
Visible Light ◽  
Short Review ◽  
Light Illumination ◽  
Photoelectrocatalytic Oxidation ◽  
Visible Light Illumination ◽  
Oxidation Of Organics

scholarly journals Enhanced Visible-Light Photocatalytic Performance of SAPO-5-Based g-C3N4 Composite for Rhodamine B (RhB) Degradation

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3948
Author(s):  
Lingfang Qiu ◽  
Zhiwei Zhou ◽  
Mengfan Ma ◽  
Ping Li ◽  
Jinyong Lu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Redox Reactions ◽  
Photocatalytic Performance ◽  
Dye Degradation ◽  
Thermal Polymerization ◽  
Light Illumination ◽  
Electron Hole ◽  
Visible Light Illumination ◽  
Visible Light Photocatalytic

Novel visible-light responded aluminosilicophosphate-5 (SAPO-5)/g-C3N4 composite has been easily constructed by thermal polymerization for the mixture of SAPO-5, NH4Cl, and dicyandiamide. The photocatalytic activity of SAPO-5/g-C3N4 is evaluated by degrading RhB (30 mg/L) under visible light illumination (λ > 420 nm). The effects of SAPO-5 incorporation proportion and initial RhB concentration on the photocatalytic performance have been discussed in detail. The optimized SAPO-5/g-C3N4 composite shows promising degradation efficiency which is 40.6% higher than that of pure g-C3N4. The degradation rate improves from 0.007 min−1 to 0.022 min−1, which is a comparable photocatalytic performance compared with other g-C3N4-based heterojunctions for dye degradation. The migration of photo-induced electrons from g-C3N4 to the Al site of SAPO-5 should promote the photo-induced electron-hole pairs separation rate of g-C3N4 efficiently. Furthermore, the redox reactions for RhB degradation occur on the photo-induced holes in the g-C3N4 and Al sites in SAPO-5, respectively. This achievement not only improves the photocatalytic activity of g-C3N4 efficiently, but also broadens the application of SAPOs in the photocatalytic field.

scholarly journals Hybrid ZnO/MoS2 Core/Sheath Heterostructures for Photoelectrochemical Water Splitting

Applied Nano ◽  
2021 ◽  
Vol 2 (3) ◽  
pp. 148-161
Author(s):  
Katerina Govatsi ◽  
Aspasia Antonelou ◽  
Labrini Sygellou ◽  
Stylianos G. Neophytides ◽  
Spyros N. Yannopoulos
Keyword(s):  
Visible Light ◽  
Wide Band ◽  
Nanowire Arrays ◽  
Maximum Efficiency ◽  
Light Illumination ◽  
Wide Band Gap ◽  
Long Term Stability ◽  
Visible Light Illumination ◽  
Nanowire Surface ◽  
Wide Range

The rational synthesis of semiconducting materials with enhanced photoelectrocatalytic efficiency under visible light illumination is a long-standing issue. ZnO has been systematically explored in this field, as it offers the feasibility to grow a wide range of nanocrystal morphology; however, its wide band gap precludes visible light absorption. We report on a novel method for the controlled growth of semiconductor heterostructures and, in particular, core/sheath ZnO/MoS2 nanowire arrays and the evaluation of their photoelectrochemical efficiency in oxygen evolution reaction. ZnO nanowire arrays, with a narrow distribution of nanowire diameters, were grown on FTO substrates by chemical bath deposition. Layers of Mo metal at various thicknesses were sputtered on the nanowire surface, and the Mo layers were sulfurized at low temperature, providing in a controlled way few layers of MoS2, in the range from one to three monolayers. The heterostructures were characterized by electron microscopy (SEM, TEM) and spectroscopy (XPS, Raman, PL). The photoelectrochemical properties of the heterostructures were found to depend on the thickness of the pre-deposited Mo film, exhibiting maximum efficiency for moderate values of Mo film thickness. Long-term stability, in relation to similar heterostructures in the literature, has been observed.

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