title: Preparation of supported mesoporous thin films concerning template removal by supercritical fluid extraction.
abstract: Thin films of silicate MCM-41 and silicate MCM-48 have been prepared on porous ceramic supports by the hydrothermal method. A comparative study of template removal has been made on supported thin films and on powder. By supercritical fluid extraction (SFE) with CH(3)OH-modified CO(2), at least 78% of the template can be removed from as-synthesized materials at 85 degrees C. X-ray diffraction (XRD) observations indicate that the resulting supported thin films after SFE are structurally stable and ordered with a weak pore contraction. The advantages of SFE over calcination in template removal are presented with a series of results obtained on supported thin films and on powder by XRD and N(2) adsorption-desorption.
authors.forename: L
authors.initials: L
authors.lastname: Huang
authors.forename: C
authors.initials: C
authors.lastname: Poh
authors.forename: S C
authors.initials: SC
authors.lastname: Ng
authors.forename: K
authors.initials: K
authors.lastname: Hidajat
authors.forename: S
authors.initials: S
authors.lastname: Kawi