Amorphous sulfated zirconium hydroxide was promoted with iron or manganese via the incipient wetness technique, to give 0.5–3.5 weight% promoter in the final catalyst. An exothermic reaction during the calcination temperature ramp (to 823 or 923 K) leads to a rapid overheating (“glow”) of the sample. XRD shows that crystallization starts before and progresses during the overheating. The surface...

nano-structured lanthanum strontium cobalt ferrite, la0.6sr0.4co0.2fe0.8o3 (lscf), was successfully synthesized via co-precipitation method using metal nitrates as starting materials. effects of precipitating agent and calcination temperature on the phase composition and morphology of synthesized powders were systematically studied using x-ray diffraction (xrd) and field emission scanning elect...

Chlorodifluoromethane (HCFC-22) is one of the air pollutants that destroy ozone layer and warm earth. In order to degrade HCFC-22, catalytic hydrolysis method currently most effective environmental technology. Herein, we prepare solid acid MoO3/ZrO2 base MgO/ZrO2 catalysts for degradation with a particular focus on revealing effects catalyst preparation methods, calcination temperatures, temper...

Up to now, researchers have proposed several synthesis methods for the preparation of β-nickel(II) hydroxide nanostructures. Most of these approaches contain harsh synthetic conditions such as multi-step processes, high temperatures and long reaction time. In this work, a novel, facile and low cost method is introduced to produce of β-Ni(OH)2 nanostructures using the gas-solution precipitation ...

Orthorhombic molybdenum oxide (α-MoO3) samples were prepared via calcination. During this process, the ratio of (0 4 0)/(1 1 0) or 0)/(0 2 1) crystallographic planes was fine-tuned by applying different calcination temperatures. Textural characterization carried out to comprehend their differences in photocatalytic and adsorption applications. Except for methyl orange, all tested dyes (methylen...

Uniform nanostructure coating of TiO2 was prepared on 316L stainless steel by sol-gel method using Tetra-n-Butyle Titanat (TBT) as alkoxide material. 316L specimens were coated with the mentioned sol by dip coating method. The influences of preparation condition, pH of sol on TiO2 nanostructure coating were investigated. Their structural properties were examined at var...

A comparing study on formation and microstructure features of aluminum titanate is investigated through both solid-state and sol-gel processes. Aluminum titanate formed by firing at 1350ºC and 1450ºC for 4h in solid-state process. In the sol-gel process formation of submicron sized particles is followed by addition of sucrose into the transparent sol. XRD analysis was confirmed the formation of...