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Nanocrystalline CaSb2O5(OH)2 and Ca2Sb2O7: Controlled syntheses, electronic structures and photocatalytic activity

Paper ID Volume ID Publish Year Pages File Format Full-Text
46278 46436 2012 7 PDF Available
Title
Nanocrystalline CaSb2O5(OH)2 and Ca2Sb2O7: Controlled syntheses, electronic structures and photocatalytic activity
Abstract

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), N2-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 (DFT) 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.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► pH-dependent controlled syntheses of CaSb2O5(OH)2 and cubic Ca2Sb2O7 with large surface area. ► CaSb2O5(OH)2 and Ca2Sb2O7 show photocatalytic activity for the degradation of MO and benzene. ► CaSb2O5(OH)2 is more photocatalytic active than Ca2Sb2O7 due to its lower crystal packing factor (PF).

Keywords
Hydrothermal; Photocatalysis; Electronic structure; Crystal structure
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Nanocrystalline CaSb2O5(OH)2 and Ca2Sb2O7: Controlled syntheses, electronic structures and photocatalytic activity
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 127, 30 October 2012, Pages 205–211
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us