نتایج جستجو برای: sulfated titania

تعداد نتایج: 7407  

Journal: :iranian journal of catalysis 0
mona hosseini-sarvari department of chemistry, shiraz university, shiraz 71454, i.r. iran. sepideh najafvand-derikvandi department of chemistry, shiraz university, shiraz 71454, i.r. iran.

nano sulfated titania was tested as solid acid heterogeneous catalyst for the synthesis of 4-(trifluoromethyl) coumarin and coumarin derivatives under solvent-free condition. factorial design evidenced a positive effect of reaction temperature, amount of catalyst, and solvents.  this nano-sized sulfated titania has been prepared by a sol-gel hydrothermal process. the prepared sulfated titania s...

Mona Hosseini-Sarvari, Sepideh Najafvand-Derikvandi

Nano sulfated titania was tested as solid acid heterogeneous catalyst for the synthesis of 4-(Trifluoromethyl) coumarin and coumarin derivatives under solvent-free condition. Factorial design evidenced a positive effect of reaction temperature, amount of catalyst, and solvents.  This nano-sized sulfated titania has been prepared by a sol-gel hydrothermal process. The prepared sulfated titania s...

Mona Hosseini-Sarvari, Sepideh Najafvand-Derikvandi

Nano sulfated titania was tested as solid acid heterogeneous catalyst for the synthesis of 4-(Trifluoromethyl) coumarin and coumarin derivatives under solvent-free condition. Factorial design evidenced a positive effect of reaction temperature, amount of catalyst, and solvents.  This nano-sized sulfated titania has been prepared by a sol-gel hydrothermal process. The prepared sulfated titania s...

Journal: :journal of nanostructures 2015
a. tadjarodi a. azad m. g. dekamin s. afshar r. hejazi

sulfated titania nanoparticles (so42-/tio2 nps) were synthesized using titanium tetraisopropoxide (ttip) by the sol-gel method. the structure and morphology of the prepared nanocatalyst was characterized using x-ray diffraction (xrd), scanning electron microscopy (sem) and brunauer–emmett–teller (bet) methods as well as fourier transform infrared (ft-ir) and energy dispersive x-ray (edx) spectr...

A. Azad A. Mollahosseini A. Tadjarodi, M. G. Dekamin, R. Hejazi S. Afshar

Sulfated titania nanoparticles (SO42-/TiO2 NPs) were synthesized using titanium tetraisopropoxide (TTIP) by the sol-gel method. The structure and morphology of the prepared nanocatalyst was characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM) and Brunauer–Emmett–Teller (BET) methods as well as Fourier transform infrared (FT-IR) and energy dispersive X-ray (EDX) spectr...

Journal: :Catalysts 2021

Composite magnetic catalysts containing different amounts of sulfated titania (33–50 wt %) have been prepared by means high energy ball-milling between TiO2 and NiFe2O4. The characterized with N2 adsorption/desorption isotherms, XRD, temperature programmed oxidation (TPO) vibrating sample magnetometer (VSM). catalytic activity was measured in the reaction aniline 4-phenylbutyric acid continuous...

2018
Nagi R. E. Radwan Mohamed Hagar Tarek H. Afifi Fahd Al-wadaani Rawda M. Okasha

New modified acidic catalysts were prepared from the treatment of silica, titania and silica prepared from hydrolyzed tetraethyl orthosilicate (TEOS) with sulfuric and phosphoric acid. The sulfated and phosphated silica synthesized from TEOS were calcined at 450 and 650 ◦C. These catalysts were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), transmissio...

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