Room temperature sol–gel synthesis of crystalline Cs[V3O8]. Probing the hydration level of the interlamellar space by 51V and 133Cs MAS NMR spectroscopy

2008 ◽  
Vol 18 (31) ◽  
pp. 3702 ◽  
Author(s):  
Olivier Durupthy ◽  
Jocelyne Maquet ◽  
Christian Bonhomme ◽  
Thibaud Coradin ◽  
Jacques Livage ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Room Temperature ◽  
Sol Gel ◽  
Mas Nmr ◽  
Hydration Level ◽  
Interlamellar Space ◽  
Sol Gel Synthesis

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%.

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.

Nanoscopic yttrium oxide fluorides: non-aqueous fluorolytic sol–gel synthesis and structural insights by 19F and 89Y MAS NMR

2015 ◽  
Vol 44 (30) ◽  
pp. 13522-13529 ◽  
Author(s):  
G. Scholz ◽  
M. Dreger ◽  
R. Bertram ◽  
E. Kemnitz
Keyword(s):  
Yttrium Oxide ◽  
Sol Gel ◽  
Mas Nmr ◽  
Yttrium Acetate ◽  
Oxide Fluorides ◽  
Sol Gel Synthesis ◽  
Structural Insights

Nanoscopic yttrium acetate fluorides Y(CH3COO)3−zFz and yttrium oxide fluorides YO(3−z)/2Fz were prepared via the fluorolytic sol–gel route and studied by 19F and 89Y MAS NMR.

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.

The effects of surfactant in the sol–gel synthesis of CuO/TiO2 nanocomposites on its photocatalytic activities under UV-visible and visible light illuminations

2020 ◽  
Vol 44 (5) ◽  
pp. 1888-1904 ◽  
Author(s):  
T. N. Ravishankar ◽  
M. de O. Vaz ◽  
S. R. Teixeira
Keyword(s):  
Visible Light ◽  
Room Temperature ◽  
Low Cost ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Photocatalytic Activities ◽  
Uv Visible ◽  
Sol Gel Synthesis ◽  
Surfactant Assisted

Effective and low-cost CuO/TiO2 nanocomposites were prepared at room temperature by a surfactant-assisted sol–gel method for photocatalytic activities under UV-visible and visible light irradiations.

scholarly journals Blend Hybrid Solid Electrolytes Based on LiTFSI Doped Silica-Polyethylene Oxide for Lithium-Ion Batteries

Membranes ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 109 ◽  
Author(s):  
Jadra Mosa ◽  
Jonh Fredy Vélez ◽  
Mario Aparicio
Keyword(s):  
Ionic Conductivity ◽  
Solid Electrolytes ◽  
Room Temperature ◽  
Sol Gel ◽  
Lithium Ion ◽  
Hybrid Structure ◽  
Hybrid Network ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Sol Gel Synthesis

Organic/inorganic hybrid membranes that are based on GTT (GPTMS-TMES-TPTE) system while using 3-Glycidoxypropyl-trimethoxysilane (GPTMS), Trimethyletoxisilane (TMES), and Trimethylolpropane triglycidyl ether (TPTE) as precursors have been obtained while using a combination of organic polymerization and sol-gel synthesis to be used as electrolytes in Li-ion batteries. Self-supported materials and thin-films solid hybrid electrolytes that were doped with Lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) were prepared. The hybrid network is based on highly cross-linked structures with high ionic conductivity. The dependency of the crosslinked hybrid structure and polymerization grade on ionic conductivity is studied. Ionic conductivity depends on triepoxy precursor (TPTE) and the accessibility of Li ions in the organic network, reaching a maximum ionic conductivity of 1.3 × 10−4 and 1.4 × 10−3 S cm−1 at room temperature and 60 °C, respectively. A wide electrochemical stability window in the range of 1.5–5 V facilitates its use as solid electrolytes in next-generation of Li-ion batteries.

Room-temperature sol–gel synthesis of organic ligand-capped ZnO nanoparticles

2015 ◽  
Vol 17 (5) ◽  
Author(s):  
Mirijam Zobel ◽  
Haimantee Chatterjee ◽  
Galina Matveeva ◽  
Ute Kolb ◽  
Reinhard B. Neder
Keyword(s):  
Zno Nanoparticles ◽  
Room Temperature ◽  
Sol Gel ◽  
Organic Ligand ◽  
Sol Gel Synthesis

Sol-Gel Synthesis & Photoluminescence of Multiple Layer LaPO4 Nanostructure Thin Films

2013 ◽  
Vol 667 ◽  
pp. 68-73 ◽  
Author(s):  
A.Z. Zainurul ◽  
Mohamad Rusop ◽  
Saifollah Abdullah
Keyword(s):  
Structural Properties ◽  
Spin Coating ◽  
Room Temperature ◽  
Sol Gel ◽  
Excitation Spectra ◽  
Force Microscopy ◽  
Lanthanum Phosphate ◽  
Atomic Force ◽  
Coating Method ◽  
Sol Gel Synthesis

The present paper reports on the structural properties of Lanthanum Phosphate (LaPO4) nanostructure film in term of its surface morphology. In this study, the LaPO4 samples were prepared by sol-gel spin coating method with different layers. Photoluminescent (PL) properties of the samples were investigated using FluoroMax-4 Spectrofluorometer - Horiba Scientific at room temperature with excitation spectra 254 nm. While its physical structural properties was investigated using atomic force microscopy (AFM-XE100).

Sol-gel synthesis of ternary phosphate-ZrO2-SiO2 catalysts for alcohol dehydration

2001 ◽  
Vol 79 (8) ◽  
pp. 1224-1228 ◽  
Author(s):  
Quan Zhuang ◽  
Jack M Miller
Keyword(s):  
Key Words ◽  
Sol Gel ◽  
Acid Catalyst ◽  
Tetraethyl Orthosilicate ◽  
Mas Nmr ◽  
Alcohol Dehydration ◽  
Zirconium Propoxide ◽  
P Content ◽  
Sol Gel Synthesis ◽  
Cp Mas Nmr

Phosphate–ZrO2–Si2O catalysts were synthesized by sol-gel method using tributyl phosphite, zirconium propoxide, and tetraethyl orthosilicate as precursors. They were characterized by N2 adsorption, 31P CP MAS NMR, and DRIFTS. At lower P content, monomeric phosphates were formed on the surface of the catalysts, which were mainly responsible for the isopropanol dehydration activity. At higher P content, polyphosphates were formed, and thus, the dehydration activity decreased. An optimum P content for dehydration activity was found to be at 10 mol%.Key words: sol-gel synthesis, ternary oxides, phosphate, acid catalyst, alcohol dehydration, 31P CP MAS NMR, N2 adsorption, DRIFTS.

Sign in / Sign up

Export Citation Format

Share Document