Characterization of Nd-MCM41 obtained by impregnation

Maria Luisa Saladino ,  Alberto Spinella ,  Eugenio Caponetti 

Università di Palermo (UNIPA), Viale delle Scienze, Pallermo 90128, Italy

Abstract

The mesoporous silica MCM41 has properties such as a high specific surface area, tuneable pore size and a narrow pore size distribution. Rare earth oxides supported MCM41 is a promising optically functional material. MCM41 was synthesized adding the silica precursor tetraethoxysilane to an aqueous solution containing cetyl-trimethylammonium bromide and hydrochloric acid. The obtained solid was calcined at 600°C for 4h. The impregnation of MCM41 with neodymium was conducted by incipient wetness method, using neodymium nitrate solution with different Nd/Si weight ratio, followed by calcination at 550°C for 5h. Samples were characterized by several techniques. The presence of neodymium was confirmed by Energy Dispersive X-ray analysis. X-Ray Diffraction analysis indicated that the unit cell parameter a0 increase with Nd/Si weight ratio, but MCM41 structure is not disrupted by the neodymium presence. The specific surface area decreases from MCM41 to Nd-MCM41 with increasing of neodymium content. It is probably due to the partially blocking of the mesostructure pores during impregnation.

Legal notice
  • Legal notice:

    Copyright (c) Pielaszek Research, all rights reserved.
    The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
    In every case, proper references including Author(s) name(s) and URL of this webpage: http://science24.com/paper/7676 must be provided.

 

Related papers
  1. Effects of thermal treatment on Eu:YAG nanopowder structure
  2. Co-precipitation synthesis of Nd:YAG nanopowders: the effect of joint thermal and mechanical treatment
  3. NANOMETRIC SEMICONDUCTOR PARTICLES IN MESOPOROUS SILICA: SYNTHESIS AND CHARACTERIZATION

Presentation: Poster at E-MRS Fall Meeting 2006, Symposium B, by Maria Luisa Saladino
See On-line Journal of E-MRS Fall Meeting 2006

Submitted: 2006-05-12 13:29
Revised:   2009-06-07 00:44
Google
 
Web science24.com
© 1998-2021 pielaszek research, all rights reserved Powered by the Conference Engine