Degradation of Methylene Blue and Rhodamine B Using a New Visible Light-Responsive Photocatalyst, KSb2PO8-xNy

作者：Ravi G; Reddy Ch Sudhakar; Sreenu K; Guje Ravinder; Velchuri Radha; Vithal M

来源：Acta Metallurgica Sinica (English Letters), 2016, 29(4): 335-343.

DOI：10.1007/s40195-016-0401-6

• Potassium phosphatoantimonates
• Characterization
• Organic dyes
• Photodegradation

Potassium phosphatoantimonates, KSb2PO8 (KSbPO) and KSb2PO8-xNy (KSbPON), are prepared by solid-state method. Urea is employed as a source of nitrogen for N-doping. Structural, morphological and optical properties of both KSbPO and KSbPON are characterized by powder X-ray diffraction (PXRD), scanning electron microscopy, energy-dispersive spectroscopy, Fourier transform infrared spectroscopy and UV-visible diffuse reflectance spectroscopy. Both samples are found to crystallize in a monoclinic lattice with Cc space group. The d-lines of KSbPO and KSbPON are refined by least square fitting the PXRD data, using POWD software to obtain their unit cell parameters. The bandgap energy (E-g) of both pristine and N-doped KSbPO is found from their Kubelka-Munk plot. The KSbPON/visible photocatalytic degradation of methylene blue and rhodamine B has been investigated in aqueous heterogeneous suspension. The generation of center dot OH in the presence of KSbPON during the photoreaction is verified by a fluorescence technique using terephthalic acid (TA) as a probe.

• 出版日期2016-4