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Synthesis of Nanofiber‐like Mesoporous γ‐ Al 2 O 3 toward Its Adsorption Efficiency for Congo Red
Author(s) -
Ghosh Sourav,
Dey Kartick P.,
Naskar Milan K.
Publication year - 2013
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12084
Subject(s) - mesoporous material , transmission electron microscopy , boehmite , thermogravimetry , differential thermal analysis , adsorption , materials science , nuclear chemistry , nanofiber , desorption , scanning electron microscope , chemical engineering , analytical chemistry (journal) , chemistry , chromatography , nanotechnology , inorganic chemistry , aluminium , organic chemistry , diffraction , composite material , catalysis , physics , engineering , optics
Nanofiber‐like mesoporous γ‐ Al 2 O 3 was synthesized using freshly prepared boehmite sol in the presence of triblock copolymer, P123 following evaporation‐induced self‐assembly ( EISA ) process followed by calcinations at 400°C–1000°C. The samples were characterized by thermogravimetry ( TG ), differential thermal analysis ( DTA ), X‐ray diffraction ( XRD ), N 2 adsorption–desorption, and transmission electron microscopy ( TEM ). The adsorption efficiency of the samples with Congo red ( CR ) was studied by UV – vis spectroscopy. XRD results showed boehmite phase in the as‐prepared sample while γ‐ Al 2 O 3 phase obtained at 400°C was stable up to 900°C, a little transformation of θ‐ Al 2 O 3 resulted at 1000°C. The Brunauer‐Emmett‐Teller surface area of the 400°C‐treated sample was found to be 175.5 m 2 g − 1 . The TEM micrograph showed nanofiber‐like morphology of γ‐ Al 2 O 3. The 400°C‐treated sample showed about 100% CR adsorption within 60 min.