A new route for the synthesis of manganese incorporated SBA-15

Manganese incorporated SBA-15 was synthesized by pre-hydrolyzing tetraethyl orthosilicate and manganese acetate above the isoelectric point of silica (pH 2–4) employing triblock copolymer as the template. The synthesized material was characterized by AAS, XRD, N 2 adsorption, FT-IR, TGA, ESR, diffus...

Full description

Saved in:
Bibliographic Details
Published in:Microporous and mesoporous materials 2008-07, Vol.112 (1), p.53-60
Main Authors: Kumar, G. Satish, Palanichamy, M., Hartmann, M., Murugesan, V.
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
ESR
Exact sciences and technology
General and physical chemistry
MnSBA-15
Porous materials
Prehydrolyse
UV–Vis DRS
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Manganese incorporated SBA-15 was synthesized by pre-hydrolyzing tetraethyl orthosilicate and manganese acetate above the isoelectric point of silica (pH 2–4) employing triblock copolymer as the template. The synthesized material was characterized by AAS, XRD, N 2 adsorption, FT-IR, TGA, ESR, diffuse reflectance UV–Vis and SEM techniques. The XRD results showed well-ordered hexagonal array of the synthesized materials. The thermal stability of synthesized material was evaluated using TGA. The results of AAS, ESR and UV–Vis DRS revealed that almost all manganese added in the initial reaction is introduced into the product at higher pH. Thus, higher pH of the synthesis gel favoured better incorporation of manganese in the framework. The incorporation of Mn 2+ in the product was confirmed by ESR studies, and the presence of Mn 3+ ions was clearly evident from UV–Vis DRS studies. Thus manganese exists both as bivalent and trivalent states in all the synthesized materials.
ISSN:1387-1811
1873-3093
DOI:10.1016/j.micromeso.2007.09.012