期刊
ACS APPLIED MATERIALS & INTERFACES
卷 4, 期 9, 页码 5022-5028出版社
AMER CHEMICAL SOC
DOI: 10.1021/am301394u
关键词
ordered mesoporous materials; iron-titanium mixed oxide; heterogeneous catalysis; recycling efficiency; dehalogenation
资金
- CSIR, New Delhi
Highly ordered two-dimensional (2D) hexagonal TiO2-Fe2O3 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 Fe2O3 or TiO2 phases. This mesoporous iron titanium mixed-oxide material has been characterized by powder Xray 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 alpha-Fe2O3 and anatase TiO2 phases. This TiO2-Fe2O3 mixed-oxide material can act as a very efficient and reusable catalyst in the dehalogenation of aromatic chloride-, bromide-, and iodide-tolerating -F, -CN, -CH3, -OCH3 and -NO2 functional groups in the aromatic ring using 2-propanol as the dispersion medium.
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