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Goverdhan Reddy Turpu , Speaker at Materials Congress
Department Of Pure And Applied Physics, Guru Ghasidas Vishwavidyalaya, India
Title : Photodegradation of Methylene Blue Dye by Hydrothermal prepared V2O5 – rGO composite


Degradation of Methylene Blue (MB) dye in 8 minutes upto 94 % is manifested in the present manuscript by using a reduced graphene oxide (rGO) – V2O5 composite, synthesized by hydrothermal method. rGO - V2O(1:0.5, 1:1, 1:2, and 1:3) composites were studied for photodegradation of MB dye. The synthesized compounds were studied for structural, morphological and optical properties through X – ray diffraction, Raman spectroscopy, SEM / TEM and UV – Visible absorption spectroscopic techniques. Individually, rGO and V2O5 show less degradation of methylene blue (MB) dye with 51 % degradation in 135 minutes and 15 % in 22 minutes, respectively. The composite of these materials with 1:1 ratio shows an excellent degradation of MB upto 94 % in 8 min. The degradation efficiency of rGO-V2O5 for 1:2, 2:1 and 1:3 compositions are 58 % in 120 min, 46% in 40 minute and 53 % in 65 minutes respectively. The calculated rate constants of dye degradation for rGO-V2O5 (1:1) is almost two orders high as compared to other specimens. Scavenger based experiments in combination with band gaps evaluated were carried out to understand the degradation scheme of the composite, where the superoxide ion role has been found superior to other elements present in the reaction.

What will audience learn from your presentation?

  • The process of Photocatalysis for the degradation of dyes and water purification.
    . This talk will help audience to extend their work by understanding various synthesis methods for nano particles and their applications.


Dr Goverdhan Reddy Turpu studied Physics from Osmania Unviersity, Hyderabad, India and completed Ph.D. in 2005. Later on, Dr Turpu worked in various fields at Indiana Univeristy, USA, IIP-UFRN, Brazil , Sejong Unviersity, Seoul, Republic of Korea as postdoctoral fellow. Dr. Turpu joined Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur, India. He works in the field of development of nano structures using various methods and their composites with reduced graphene oxide / other carbonaceous materials. He has published more than 40 paper in journals.