Res. Chem. Intermed.
, Vol. 34, No. 4, pp. 347–352 (2008)
Koninklijke Brill NV, Leiden, 2008.
Also available online - www.brill.nl/rci
Evaluation of microstructures and properties of bulk
, HIDEZUMI NAGATA
, TAKAMASA ONOKI
Osaka Prefecture University, 1-1, Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
Tokyo Institute of Technology, 4259, Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
Hosei University, 4342, Aihara-cho, Machida, Tokyo 194-0298, Japan
Received 1 May 2007; accepted 31 August 2007
Abstract—Synthesis of mesoporous MCM-type bulks prepared by hydrothermal hot-pressing (HHP)
method using MCM-type mesoporous powder was attempted. Scanning electron microscopy (SEM),
bulk density measurement, N
adsorption–desorption isotherms and formaldehyde adsorption test
have been employed to characterize the bulky products. As a result, we succeeded in preparing a dense
and strong mesoporous bulks with high BET over 1000 m
/g through the hydrothermal hot-pressing
method under appropriate conditions.
Keywords: Mesoporous silica; hydrothermal hot-pressing; adsorption; formaldehyde.
Since the discovery of a fascinating class of mesoporous molecular sieves, M41S,
in 1992 [1, 2], the surfactant-template synthesis for mesoporous materials that we
desire has constituted the essence of research in the ﬁelds of materials and surface
chemistry. Synthesis of such open-structured inorganic materials has expanded the
range of uniform pore sizes from the micropore to the mesopore range. Most of the
research has been concentrated on MCM-41 because of its hexagonal arrangement
of uni-dimensional mesopores with uniform size, the diameter being controllable in
the range of 2–10 nm [3–7]. These rigid structured materials possessing extremely
high speciﬁc pore volumes, larger speciﬁc surface areas more than 1000 m
and narrow adjustable pore size distribution can be synthesized under controlled
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