Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 127, Issue -, Pages 205-211Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2012.08.025
Keywords
Hydrothermal; Photocatalysis; Electronic structure; Crystal structure
Funding
- National Natural Science Foundation of China [20977016, 21073035, 90922022]
- National Basic Research Program of China (973 Program) [2011CB612314]
- Minjiang Scholar Professorship
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A facile one-pot pH-dependent hydrothermal method has been developed in the controlled syntheses of CaSb2O5(OH)(2) and cubic Ca2Sb2O7 with large specific surface area. The as-obtained samples were characterized by X-ray diffraction (XRD), N-2-sorption BET surface area, UV-vis diffuse reflectance spectroscopy (DRS), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), energy dispersive X-ray analysis (EDX) and Fourier transformation infrared spectroscopy (FT-IR). The electronic structures of CaSb2O5(OH)(2) and cubic Ca2Sb2O7 were determined by density functional theory (OFT) calculations. The photocatalytic performance of the as-prepared CaSb2O5(OH)(2) and cubic Ca2Sb2O7 was evaluated by the degradation of methyl orange (MO) and gaseous benzene. It was found that CaSb2O5(OH)(2) is more photocatalytic active than Ca2Sb2O7. A low crystal packing factor (PF) of CaSb2O5(OH)(2) is probably responsible for its superior photocatalytic performance as compared to that of cubic Ca2Sb2O7. (C) 2012 Elsevier B.V. All rights reserved.
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