title: Highly ordered mesoporous TiO2-Fe2O3 mixed oxide synthesized by sol-gel pathway: an efficient and reusable heterogeneous catalyst for dehalogenation reaction.
abstract: Highly ordered two-dimensional (2D) hexagonal TiO(2)-Fe(2)O(3) mixed-oxide material MFT-1, which is composed of very tiny nanoparticles, is synthesized using sodium dodecylsulfate (SDS) as a structure-directing agent. Interestingly, synthesis of an ordered mesophase was not possible using SDS as a template for mesoporous pure Fe(2)O(3) or TiO(2) phases. This mesoporous iron-titanium mixed-oxide material has been characterized by powder X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), N(2) sorption, ultraviolet-visible light diffuse reflectance spectroscopy (UV-vis DRS) studies. N(2) sorption analysis revealed high surface areas (126-385 m(2) g(-1)) and narrow pore size distributions (3.1-3.4 nm) for different samples. UV-vis DRS spectra and wide-angle powder XRD patterns indicate that the material is composed of α-Fe(2)O(3) and anatase TiO(2) phases. This TiO(2)-Fe(2)O(3) mixed-oxide material can act as a very efficient and reusable catalyst in the dehalogenation of aromatic chloride-, bromide-, and iodide-tolerating -F, -CN, -CH(3), -OCH(3) and -NO(2) functional groups in the aromatic ring using 2-propanol as the dispersion medium.
authors.affiliation: Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India.
authors.forename: Astam K
authors.initials: AK
authors.lastname: Patra
authors.forename: Arghya
authors.initials: A
authors.lastname: Dutta
authors.forename: Asim
authors.initials: A
authors.lastname: Bhaumik
mesh_terms: D000327:Adsorption; D002384:Catalysis; D005290:Ferric Compounds / Q000737:chemistry*; D005782:Gels / Q000737:chemistry*; D054879:Halogenation; D053758:Nanoparticles / Q000737:chemistry; D009584:Nitrogen / Q000737:chemistry; D016062:Porosity; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry; D014025:Titanium / Q000737:chemistry*
chemical_list: D005290:Ferric Compounds; D005782:Gels; C009495:titanium dioxide; C000499:ferric oxide; D012967:Sodium Dodecyl Sulfate; D014025:Titanium; D009584:Nitrogen