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Mesoporous RF-xerogels by facile hydrothermal synthesis
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Document Title
Mesoporous RF-xerogels by facile hydrothermal synthesis
Author
Ratchahat S.,Kodama S.,Sekiguchi H.,Tanthapanichakoon W.,Al-Ali K.,Charinpanitkul T.,Soottitantawat A.,Eiad-Ua A.,Faungnawakij K.
Name from Authors Collection
Affiliations
Dept. of Chem. Eng., Tokyo Institute of Technology, Tokyo, 152-8550, Japan; Dept. of Chem. and Env. Eng., Masdar Institute of Science and Technology, Abu Dhabi, United Arab Emirates; Chulalongkorn University, Bangkok, 10330, Thailand; National Nanotechnology Center, NSTDA, Patumthani, 12120, Thailand
Type
Article
Source Title
Engineering Journal
ISSN
01258281
Year
2015
Volume
19
Issue
3
Open Access
All Open Access, Bronze, Green
Publisher
Chulalongkorn University 1
DOI
10.4186/ej.2015.19.3.95
Abstract
Mesoporous resorcinol-formaldehyde (RF) xerogels were difficult to obtain by conventional sol-gel polymerization at atmospheric pressure because the resulting tenuous RF-gel structures tended to shrink or collapse during subsequent hot-air drying. To avoid this problem, costly and energy-intensive supercritical drying and freeze-drying are often used. In this work the main goal was to produce high-quality RF xerogels with good mesoporosity and high surface area by employing a hydrothermal process. The hydrogel synthesis was carried out in an autoclave at elevated temperature and pressure in order to sufficiently strengthen its network structure. The initial reactant ratio was held constant to search for most suitable hydrothermal temperature and initial pH. The experimental results showed that the reaction in the autoclave at 140 ºC and initial pH of 6 could successfully produce RF xerogels with good mesoporosity (peaking pore radius rpeak = 2.38 nm), high specific surface area and large pore volume. The hydrothermal process was on the overall relatively simple, low-cost, and less time-consuming compared to the conventional atmospheric method. © 2015, Chulalongkorn University 1. All rights reserved.
Keyword
Industrial Classification
Knowledge Taxonomy Level 1
Knowledge Taxonomy Level 2
Knowledge Taxonomy Level 3
License
CC BY-NC-ND
Rights
EJ
Publication Source
Scopus