Search

Sr 1.36 Sb 2 O 6 nano-octahedrons were successfully prepared via a facile hydrothermal method from Sb 2 O 5 . The as-prepared Sr 1.36 Sb 2 O 6 was characterized by X-ray diffraction (XRD), UV–vis diffuse reflectance spectra (DRS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) and energy dispersive spectrometer (EDS). Acidity of the precursor mixture had a positive effect on crystallization of Sr 1.36 Sb 2 O 6 . RuO 2 -loaded Sr 1.36 Sb 2 O 6 showed photocatalytic activity for overall water splitting without adding hole scavengers to produce H 2 and O 2 under Xenon lamp irradiation. Sr 1.36 Sb 2 O 6 prepared at low pH exhibited superior photocatalytic activity possibly due to its high degree of crystallization. [ABSTRACT FROM AUTHOR]

Abstract: Porous nanocrystalline Ln2Ti2O7 (Ln=Nd, Gd, Er) was prepared by a facile self-propagating combustion method using metal nitrates (Ln(NO3)3 (Ln=Nd, Gd, Er), TiO(NO3)2) and glycine. The photocatalytic activity of Ln2Ti2O7 (Ln=Nd, Gd, Er) was evaluated by the photocatalytic degradation of methyl orange (MO). The results showed that the photocatalytic activity of Ln2Ti2O7 (Ln=Gd, Er) with cubic pyrochlore structure was higher than that of Nd2Ti2O7 with monoclinic perovskite structure and Gd2Ti2O7 showed the best photocatalytic activity. The different photocatalytic activities observed for Ln2Ti2O7 (Ln=Nd, Gd, Er) could be related to its different crystal structures and Ln 4f shells. [Copyright &y& Elsevier]