نتایج جستجو برای: co precipitation

تعداد نتایج: 388160  

A co-precipitation method was used for synthesis of pure MgTiO3 ceramic powder with Mg(NO3)2.6H2O, TiCl4 or C12H28O4Ti and NaOH as raw materials. In this method, solutions of 1 M, Mg (NO3)2 6H2O and 2 M, NaOH were prepared. A stoichiometric amount of Ti precursors from TiCl4 or C12H28O4Ti was weighted. Solutions of Mg (NO3)2. 6H2O and Ti precursor were added dropwise to NaOH solution unde...

A facile and simple method was proposed to control the size and shape of the MgO nano structures with high surface area in the presence of efficient and cheap templates like PEG 200, PEG 600, PEG 4000 and sorbitol at low temperature within a little time. Nano rods and Nanoparticles have been achieved by applying these templates and altering other growth parameters. The products were charact...

Nanocrystalline ceria has been considered as support for carbon monoxide preferentially oxidation. In this study ceria was prepared by precipitation method and the effects of preparation conditions, such as pH of solution (8-10), aging time (1-12 hr), drying temperature (80-120 °C), calcination time (2-6 hr) and temperature (400-600 °C) were investigated on ceria synthesized powders properties....

2015
Jinzhu Ma Hong He Fudong Liu

We synthesized different Fe/TiO2 catalysts and studied the influence of Fe on the structure and performance of Fe/TiO2 as a photocatalyst to remove gaseous NO in air under visible light. The electron paramagnetic resonance results revealed that Fe ions substituted the Ti ions of TiO2 prepared by coprecipitation and homogeneous precipitation method. More Fe ions were incorporated into the crysta...

2007
M. C. AGUIRRE G. SANTORI P. REYES

The effect of the preparation method of Co/TiO2 catalysts on the performance in the liquid phase hydrogenation of cinnamaldehyde and crotonaldehyde has been studied. The Co/TiO2 catalysts were prepared by impregnation on titania (TiO2, P-25), sol-gel, and precipitation procedures. Different reduction-oxidation-reduction cycles were carried out in order to detect possible changes in the nature o...

Journal: :journal of the iranian chemical research 0
beena bhaskaran department of chemistry, d. b college, sasthamcotta, kollam, kerala, india manoj sadanandan, department of chemistry, d. b college, sasthamcotta, kollam, kerala, india

nanoparticles of zirconium(iv) tungstate are prepared by chemical co-precipitation method. thecharacterizations have been carried out by tg/dta, dsc, afm, xrd, ftir and uv-vis spectrum. plspectrum shows two emission bands at 350 nm and at 477 nm. the effects of frequency on the dielectricbehavior and ac electrical conductivity have been studied. the dielectric constant is found to be 119.43 at1...

Journal: :Chemical communications 2010
Wei Wei Xiaobin Huang Xiaoli Zhao Peng Zhang Xiaozhen Tang

This study reports a novel super-hydrophobic surface with fluorinated cross-linked poly[cyclotriphosphazene-co-(4,4'-(hexafluoroisopropylidene)diphenol)] microspheres prepared via a single-step precipitation polymerization and simple dip-coating route.

Journal: :Chemical communications 2013
Yingyu Li Shuiqin Zhou

With a rational design of functional co-monomers, low-cost dye-complexed microgels, capable of continuous glucose detection at physiological pH, were readily synthesized in one-pot via precipitation polymerization in water.

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