Band gap engineering and Photocatalytic activity of new trirutile structure Zn1-xMgxSb2O6 (0< x<1) solid solution

N, ARUNKUMAR

Abstract

Solid solution of trirutile structure type antimonate Zn1-xMgxSb2O6 (0< x <1) and its photocatalytic activity is reported here. Compound has been characterized by Powder X-ray diffraction confirms the formation of single phasic trirutile products throughout the solid solution. SEM reveals spherical shaped particles with an average particle size of 0.25 – 0.5 µm. EDAX analysis confirms the elemental composition. Raman spectral modes of Zn1-xMgxSb2O6 characteristic of trirutile structure confirm Mg substitution into ZnSb2O6. UV – vis diffused reflectance spectra show optical absorption edge in the range of 370 – 318 nm. The band gap of Zn1-xMgxSb2O6 (0< x <1) is in the range of 3.35 – 4.05 eV indicating band gap engineering and is explained by electro negativity and band dispersion. All the compositions of Zn1-xMgxSb2O6 showed significant photocatalytic activity towards degradation of rhodamine (RhB) and it is maximum for MgSb2O6 whose remarkable photocatalytic activity is described here.


Keyword(s)

A. Oxide, A. Semiconductors, B. Optical properties, C. Raman spectroscopy, D. Catalytic properties.


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