Introduction
Mesoporous materials usually have high surface area and large pore volume. The pore
diameters are narrowly centered at 2-50 nm. Hence, novel mesoporous materials with
nanostructured morphology have been developed by different synthesized routes, which
include sol-gel route, microwave-assisted synthesis, co-precipitation, solid-state reaction,
and hydrothermal urea reaction in our lab. One of the objectives of this thesis study is to
extend this synthesized approach to develop nanostructured porous materials, and to explore
some new potential applications, such as carbon dioxide capture and controlled drug
delivery.
Chapter 2 presents literature review focused on the synthesis of mesoporus materials
and a potential application of these materials in the carbon dioxide capture or drug delivery
is also included in this chapter.
A pre-study on the sorbents for CO2 capture, in the Appendix-1, which presents a study
focused on the synthesis of the metal oxides (M-Al-O; M=Mg, Ca, and Sr). To use
hydrothermal co-precipitation route, the metal oxide precursors was fabricated by the
divalent metal ion and trivalent metal ion in basic solution. These metal oxides can be use as
CO2 sorbent at various adsorption temperatures. Moreover, the structural characterization
and CO2 adsorption behavior of the metal oxide is clearly described in the Appendix-1.
Chapter 3 presents the studies on a novel mesoporous CaAl oxides, which was
prepared by synthesizing and modifying AlOOH-supported CaAl layered double hydroxides
(CaAl LDHs) in hydrothermal urea reaction. The mesoporous CaAl metal oxides exhibited
ordered hexagonal mesoporous arrays or uniform nanotubes with a large surface area,
narrow pore size distribution, and highly crystalline frameworks. The mesoporous metal
oxides were used as a solid sorbent for high-temperature CO2 capture and displayed a