Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 171, Issue -, Pages 24-34Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2013.01.001
Keywords
Mesoporous hectorites; Delaminated hectorites; Silicate-bearing hectorites; Microwaves; Ultrasounds
Categories
Funding
- Ministerio de Ciencia e Innovacion of Spain
- FEDER funds [CTQ2008-04433/PPQ, CTQ2011-24610]
Ask authors/readers for more resources
Stable mesoporous delaminated and silicate-bearing hectorites were synthesized at short times (1-2 h) varying the pH of the hydrothermal treatment (7 and 10) and using microwaves and ultrasounds during the synthesis. The use of microwaves, ultrasounds and aging pH of 10 improved hectorite crystallinity. Additionally, longer times of ultrasounds involved a better incorporation of magnesium and lithium cations in the octahedral sheet for the delaminated hectorites prepared a pH 7. Delaminated hectorites showed higher BET areas (536-603 m(2)/g) than silicate-bearing hectorites, due to delamination and probably to the presence of magnesium vacancies in the octahedral sheet. The formation of vacancies was favored with the use of microwaves and at short times of ultrasounds. This agrees with the C.E.C. values and the low amounts of lithium obtained for delaminated samples. (C) 2013 Elsevier Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available