62.
Nanofiber‐like mesoporous γ‐Al
2O
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
2O
3 phase obtained at 400°C was stable up to 900°C, a little transformation of θ‐Al
2O
3 resulted at 1000°C. The Brunauer‐Emmett‐Teller surface area of the 400°C‐treated sample was found to be 175.5 m
2g
? 1. The TEM micrograph showed nanofiber‐like morphology of γ‐Al
2O
3. The 400°C‐treated sample showed about 100% CR adsorption within 60 min.
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