Photocatalytic degradation of Rhodamine B by metal oxide nanocomposites

Rajeswari P.; Prabhu S.; Jothi Venkatachalam K.; Dhanuskodi S.

doi:10.1117/12.2079083

13 March 2015 Photocatalytic degradation of Rhodamine B by metal oxide nanocomposites

Rajeswari P., Prabhu S., Jothi Venkatachalam K., Dhanuskodi S.

Proceedings Volume 9364, Oxide-based Materials and Devices VI; 936418 (2015) https://doi.org/10.1117/12.2079083
Event: SPIE OPTO, 2015, San Francisco, California, United States

Abstract

Nanocomposites of ZnO with p-type NiO and n-type SnO₂ in the equimolar ratio were prepared by microwave assisted method inorder to reduce the fast recombination rate of ZnO. XRD reveals the formation of nanocomposites of ZnO. The photocatalytic activity of nanocomposites against RhB is poor compared to control ZnO. The control ZnO nanocrystals exhibit 100% degradation efficiency and is mainly ascribed to the decrease in band gap and increase in surface defects. The decolorization of RhB follows the pseudo-first order kinetics and the mechanism is explained on the basis of charge trapping through defect sites.

Citation Download Citation

Rajeswari P., Prabhu S., Jothi Venkatachalam K., and Dhanuskodi S. "Photocatalytic degradation of Rhodamine B by metal oxide nanocomposites", Proc. SPIE 9364, Oxide-based Materials and Devices VI, 936418 (13 March 2015); https://doi.org/10.1117/12.2079083

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