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Catalysis holds a very important and promising place in chemical industry. In a typical chemical transformation, the use of a catalyst reduces the reagent-based waste and enhances the reaction selectivity, thereby minimizing the chances of getting any side product. In the recent years, the introduction of nanotechnology in the field of catalysis has further revolutionized it. It is the extremely small...
In this paper, we describe the facile and effective preparation of a series of cobalt-doped Fe3O4 nanocatalysts via chemical coprecipitation in an aqueous solution. The catalyst allowed the hydrogenation of chloronitrobenzenes to chloroanilines (CAs) to proceed at low temperatures in absolute water and at atmospheric pressure, resulting in approximately 100% yield and selectivity. Several factors...
Ba-doped BiFeO3 (Bi1-xBaxFeO3) nanoparticles have been synthesized by sol-gel process using bismuth nitrate and iron nitrate as sources. X-ray diffraction (XRD) results show that a peak shift toward low angle caused by the Ba doping. Two characteristic peaks of (104) and (110) merging to a single peak was found when the Ba concentration up to 1%. Transmission electron microscope (TEM) images show...
Various loading amount of La-CuO/TiO2 were synthesized via a one step sol-gel process. The crystal structure and chemical properties were characterized using X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). XRD analysis revealed that two characteristic peaks at 35.54° and 38.76° according to cubic CuO were observed in the X-ray diffraction patterns of La-CuO/TiO2. Ti4+, Olat into...
A series of Zn2+ and Eu3+ co-doped TiO2 catalysts were prepared by a modified sol-gel method. The prepared catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy(TEM) and ultraviolet-visible diffuse reflection spectroscopy(UV-vis DRS). Characteristic results clearly show that all of Zn2+ and Eu3+ co-doped TiO2 samples exclusively consist of primary anatase crystallites,...
TiO2 is an ideal material for catalytic technology due to its unique properties. In this paper, the effect of Sm3+ dopant on the photocatalytic activity of TiO2 was studied to improve the catalytic efficiency of TiO2. The Sm3+-TiO2 photocatalyst was made from Titanium Tetrabutoxide and Samarium Oxide with the Sol-Gel process and used to degrade reactive orange 4 (RO4) in Azo Dyes. The characteristics...
In this study, we have investigated the effect of doping with cobalt and manganese oxide on the photocatalytic activity of nanoparticulate zinc oxide. Zinc oxide powders with controlled particle size, minimal agglomeration, and controlled chemical composition were manufactured by mechanochemical processing. The photocatalytic activity of the powders was measured using the spin trapping technique with...
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