scholarly journals Room Temperature Synthesis of V-Doped TiO2 and Its Photocatalytic Activity in the Removal of Caffeine under UV Irradiation

Materials ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 911 ◽  
Author(s):  
Olga Sacco ◽  
Diana Sannino ◽  
Mariantonietta Matarangolo ◽  
Vincenzo Vaiano
Keyword(s):  
Room Temperature ◽  
Uv Light ◽  
Sol Gel ◽  
Doped Tio2 ◽  
Toc Removal ◽  
Calcination Step ◽  
Caffeine Degradation ◽  
Wavelength Emission ◽  
Sol Gel Synthesis ◽  
Uv Leds

In this work, the influence of simple acids in the room temperature sol-gel synthesis of TiO2 was investigated and the efficiency of prepared photocatalysts was evaluated in the removal of caffeine. To improve the photoactivity of TiO2, vanadium-doped TiO2 (VTiO2) samples were obtained starting from different amount of vanadyl sulphate as a dopant source. The samples were centrifuged, washed and finally dried at room temperature, and no calcination step was carried out. The prepared photocatalysts were characterized by different techniques (X-ray powder diffraction (XRD), specific surface area (SSA), ultraviolet-visible diffuse reflectance spectra (UV-vis DRS) and Raman). VTiO2 photocatalysts were tested in the photocatalytic removal of aqueous solutions containing caffeine. The photocatalytic tests were carried out in a recirculating batch cylindrical photoreactor irradiated by a UV LEDs strip (nominal power of 12 W and wavelength emission peak at about 365 nm) surrounding the external surface of the reactor. The optimized VTiO2 photocatalyst was able to reach a caffeine degradation of about 96% after 360 min of UV light irradiation with a total organic carbon (TOC) removal of 72%.

Nano-crystalline Ce-doped TiO2 powders: sol-gel synthesis and optoelectronic properties

2018 ◽  
Vol 5 (9) ◽  
pp. 095008 ◽  
Author(s):  
Azam Jafari ◽  
Siamak Khademi ◽  
Majid Farahmandjou
Keyword(s):  
Sol Gel ◽  
Optoelectronic Properties ◽  
Doped Tio2 ◽  
Nano Crystalline ◽  
Sol Gel Synthesis

Sol–gel synthesis of Sn/Fe co-doped TiO2 nanoparticles: study of structural, optical and photocatalytic properties

2018 ◽  
Vol 29 (14) ◽  
pp. 12351-12359 ◽  
Author(s):  
Behzad Koozegar Kaleji ◽  
Sajad Mirzaee ◽  
Soroush Ghahramani ◽  
Saba Rezaie ◽  
Navid Hosseinabadi ◽  
...  
Keyword(s):  
Tio2 Nanoparticles ◽  
Sol Gel ◽  
Photocatalytic Properties ◽  
Doped Tio2 ◽  
Sol Gel Synthesis ◽  
Co Doped

scholarly journals Zn Doped α-Fe2O3: An Efficient Material for UV Driven Photocatalysis and Electrical Conductivity

Crystals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 273 ◽  
Author(s):  
Suman ◽  
Surjeet Chahal ◽  
Ashok Kumar ◽  
Parmod Kumar
Keyword(s):  
Band Gap ◽  
Room Temperature ◽  
Uv Light ◽  
Sol Gel ◽  
High Energy ◽  
Lattice Parameter ◽  
Dielectric Behavior ◽  
Energy Storage Devices ◽  
Vis Spectroscopy ◽  
Potential Applications

Zinc (Zn) doped hematite (α-Fe2O3) nanoparticles with varying concentrations (pure, 2%, 4% and 6%) were synthesized via sol-gel method. The influence of divalent Zn ions on structural, optical and dielectric behavior of hematite were studied. X-ray diffraction (XRD) pattern of synthesized samples were indexed to rhombohedral R3c space group of hematite with 14–21 nm crystallite size. The lattice parameter (a and c) values increase upto Zn 4% and decrease afterwards. The surface morphology of prepared nanoparticles were explored using transmission electron microscopy (TEM). The band gap measured from Tauc’s plot, using UV-Vis spectroscopy, showed reduction in its values upto Zn 4% and the reverse trend was obtained in higher concentrations. The dielectric properties of pure and Zn doped hematite were investigated at room temperature and followed the same trends as that of XRD parameters and band gap. Photocatalytic properties of nanoparticles were performed for hazardous Rose bengal dye and showed effective degradation in the presence of UV light. Hence, Zn2+ doped hematite can be considered as an efficient material for the potential applications in the domain of photocatalysis and also higher value of dielectric constant at room temperature makes them applicable in high energy storage devices.

The effect of solvent in the sol–gel synthesis of visible light-activated, sulfur-doped TiO2 nanostructured porous films for water treatment

2014 ◽  
Vol 224 ◽  
pp. 132-139 ◽  
Author(s):  
Changseok Han ◽  
Joel Andersen ◽  
Vlassis Likodimos ◽  
Polycarpos Falaras ◽  
Jacob Linkugel ◽  
...  
Keyword(s):  
Water Treatment ◽  
Visible Light ◽  
Sol Gel ◽  
Porous Films ◽  
Doped Tio2 ◽  
Effect Of Solvent ◽  
Sol Gel Synthesis

scholarly journals Nanoscale CaF2 doped with Eu3+ and Tb3+ through fluorolytic sol–gel synthesis

2014 ◽  
Vol 2 (40) ◽  
pp. 8607-8613 ◽  
Author(s):  
Benjamin Ritter ◽  
Thoralf Krahl ◽  
Knut Rurack ◽  
Erhard Kemnitz
Keyword(s):  
Room Temperature ◽  
Sol Gel ◽  
Synthesis Method ◽  
One Pot ◽  
One Pot Synthesis ◽  
Sol Gel Synthesis

Easy upscaleable one-pot synthesis method at room temperature for ultra small sized Eu3+- and Tb3+-doped CaF2 nanoparticles.

scholarly journals Sol-Gel Synthesis of Fe2O3-Doped TiO2 for Optimized Photocatalytic Degradation of 2,4- Dichlorophenoxyacetic Acid

2017 ◽  
Vol 33 (04) ◽  
pp. 1959-1968 ◽  
Author(s):  
Afini Razani ◽  
Abdul Halim Abdullah ◽  
Anwar Fitrianto ◽  
Nor Azah Yusof ◽  
Umar Ibrahim Gaya
Keyword(s):  
Photocatalytic Degradation ◽  
Sol Gel ◽  
Dichlorophenoxyacetic Acid ◽  
Doped Tio2 ◽  
2,4 Dichlorophenoxyacetic Acid ◽  
Sol Gel Synthesis

scholarly journals Sol–gel synthesis and room-temperature properties of α-LiZr2(PO4)3

RSC Advances ◽  
2015 ◽  
Vol 5 (22) ◽  
pp. 17054-17059 ◽  
Author(s):  
Hany El-Shinawi ◽  
Colin Greaves ◽  
Jürgen Janek
Keyword(s):  
Room Temperature ◽  
Sol Gel ◽  
Bulk Conductivity ◽  
Gel Method ◽  
Sol Gel Method ◽  
Sol Gel Synthesis

A room-temperature stable α-LiZr2(PO4)3 phase is prepared by a modified sol–gel method, and shows bulk conductivity as high as 1.58 × 10−4 Scm−1.

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