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UV- Visible Diffuse Reflectance spectroscopic studies on Mn and Cu ion exchange of newly synthesized cerium zirconium antimonate and its application in dye degradation

Author Affiliations

  • 1Post Graduate and Research Department of Chemistry,Government College, Kasaragode, Kerala, INDIA
  • 2Post Graduate and Research Department of Chemistry, Sree Narayana College, Kannur-670 007, Kerala, INDIA

Res. J. Recent Sci., Volume 1, Issue (ISC-2011), Pages 85-92, (2012)

Abstract

A novel inorganic cation exchanger cerium zirconium antimonate (CZSb) was synthesized by co precipitation method. Zirconium substitution of cerium in the solid solution has proved to be beneficial in increasing the oxygen storage capability. Chemical composition of the compound was determined from EDS and structural studies were carried out using TGA, XRD and FTIR. UV-VIS Diffuse Reflectance spectroscopic studies were conducted to obtain information on surface coordination and different oxidation states of metal ions and to study their properties. The material synthesized showed very good cation exchange properties and the distribution studies showed that the selectivity towards various metal ions was in the order Pb2+ > Cu2+ > Mn2+ > Co2+ > Cd2+ > Y3+ > Ni2+ >Hg2+ > Zn2+ > Th3+ > Mg2+ . Its selectivity for lead helps the removal of it from other cations. Cu2+ ion exchange changes the color of the material from yellow to green and Mn2+ ion,s which get oxidized in the matrix of the material changes the color to dark brown /black. Thus the material can be used as an environment friendly solid indicator for the detection of trace amounts of Mn2+ ions in solution. The electron exchange property of cerium ions enable it to be used widely in various catalytic and functional systems. UV-Vis DR Spectroscopy was used for characterizing the synthesized material and its Mn and Cu ion exchanged forms. The decrease in rate of catalytic degradation of methyl orange dye with its Mn exchanged form is correlated with its UV VIS DR spectra.

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