SciELO - Scientific Electronic Library Online

 
vol.12 issue4Effect of solvents on the morphological characterization of enteric nanoparticlesImpact and fracture resistance of an experimental acrylic polymer with elastomer in different proportions author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Materials Research

Print version ISSN 1516-1439

Abstract

NARAYANAN, Venkatathri; DANIEL, Santhanaraj  and  KANNAN, Shanthi. Synthesis and characterization of a novel mesoporous Mn - organophosphate molecular sieve. Mat. Res. [online]. 2009, vol.12, n.4, pp.411-414. ISSN 1516-1439.  https://doi.org/10.1590/S1516-14392009000400006.

A novel mesoporous Mn - organophosphate was synthesized for the first time. It is characterized by several physicochemical techniques. Small angle X-ray diffraction analysis shows the first peak in 2.5ºwith 39 Aº pore width. Elemental analysis shows that the composition is [(C12H23N)3PO]40Mn. Scanning electron microscopic picture shows the flag morphology with 1-15 µm particle size. Thermogravimetry/Differentaial thermal analysis shows almost 80% exothermic weight loss. Nitrogen adsorption isotherm shows type III with 300 m2/g BET surface area. Fourier transform Infrared spectroscopic analysis shows that the framework vibrations are comparable to other well known silica mesoporous materials. Electron spin resonance spectroscopic analysis shows the absence of hyperfine splitting indicates the presence of Mn3+ species. Ultraviolet - visible spectroscopic analysis shows that most of the Mn is in tetrahedral co-ordination beside small square pyramidal species. A plausible synthesis mechanism also proposed.

Keywords : mesoporous; Mn - organophosphate; characterization.

        · text in English     · English ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License