Publication Date:
2012-11-17
Description:
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.
Print ISSN:
0002-7820
Electronic ISSN:
1551-2916
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
