IJEP 42(3): 328-335 : Vol. 42 Issue. 3 (March 2022)
1. Sri Eshwar College of Engineering, Department of Chemistry, Coimbatore – 641 202, Tamil Nadu, India
2. Karpagam Academy of Higher Education, Department of Chemistry, Faculty of Engineering, Coimbatore -641 021, Tamil Nadu, India
3. Karpagam Institute of Technology, Department of Chemistry, Coimbatore – 641 105, Tamil Nadu, India
4. Hindustan College of Engineering and Technology, Department of Chemistry, Coimbatore – 641 032, Tamil Nadu, India
Abstract
This work is focused on the study of photo-electrocatalytic degradation of Rhodamine B (RhB) dye by RuO2/IrO2/TaO2 coated titanium electrodes. Combining electrochemical and photo-catalysis technologies called photo-electrocatalytic technology offers the opportunity to separate electron–hole, photo-generated and promote the formation of highly reactive, oxidising species that contribute e-/h+ and to prevent their recombination. Experiment was carried out with various operating parameters, such as initial pH, applied current density, dye concentration, supporting electrolyte concentration, stirring speed and treatment time. The experimental results revealed that the colour removal increases with increase in current density and NaCl concentration, while it was found to decrease with the increase in initial dye concentration. Under the neutral medium, the decolourization efficiency reached 100% in 30 min of electrolysis time. The pH was found to be an important parameter for the process, the maximum efficiency of colour removal was achieved at pH 7.0. The GC-MS confirms the degradation of Rhodamine B from aqueous solution.
Keywords
Photo-electrocatalytic oxidation, Rhodamine B dye, RuO2/IrO2/TaO2 coated titanium electrode, Colour removal
References
- Hassan, A., et al. 2019. Photo-catalysts for degradation of dyes in industrial effluents: Opportunities and challenges. Nano res., 12:955-972.
- Moses, G., et al. 2017. Photo-electrocatalytic water treatment systems: degradation, kinetics and intermediate products studies of sulphame-thoxazole on a TiO2–exfoliated graphite electrode. RSC Adv., 7: 40571-40580.
- Neppolian, B., et al. 2002. Solar/UV-induced photocatalytic degradation of three commercial textile dye. J. Hazard. Mater., 89 (2-3):303-317.
- Rathinam, R., et al. 2016. Decolourization of Rhodamine B from aqueous by electrochemical oxidation using graphite electrodes. Des. Water Treat., 57:16995 -17001.
- Yu, C.L., et al. 2012. Preparation, characterization and photo-catalytic performance of Mo-doped ZnO photocatalysts. Sci. China Chem., 55:1802-1810.
- Wang, Z.J., et al. 2004. Ultraviolet emission of ZnO film prepared by electrophoretic deposition. Chin. Phys.,13: 750 -753.
- Wahyuningsih, S., et al. 2014. Visible light photo-electrocatalytic degradation of rhodamine B using a dye-sensitised TiO2electrode. Chem. Papers. 68:1248–1256.
- Habib, M.A., et al. 2013. Synthesis and characterization of ZnO-TiO2nanocomposites and their application as photo-catalysts. Int. Nano Letters. 3-5.
- Gouvea, K., et al. 2000. Semiconductor-assisted photo-catalytic degradation of reactive dyes in aqueous solution. Chemosphere. 40(4): 433-440.
- Behnajady, M.A., et al. 2006. Kinetic study on photo-catalytic degradation of C.I. acid yellow 23 by ZnO photo-catalyst. J. Hazard. Mater.,133(1-3):226-232.
- Yu, K., et al. 2009. Visible light-driven photo-catalytic degradation of Rhodamine B over NaBiO3 pathways and mechanisms. J. Phys. Chem. A. 113 (37):10024-10032.
- Zhou, M., et al. 2008. The preparation and characterization of a graphite–PTFE cathode system for the decolourization of C.I. acid red 2. Dyes Pigments. 77:129-136.
- Wang, P., et al. 2013. Dye-sensitization-induced visiblelight reduction of graphene oxide for the en-hanced TiO2photo-catalytic performance. ACS Appl. Mater. Interfaces. 5:2924-2929.
- Wang, Y.H., et al. 2006. Electrochemical degradation of 4-chlorophenol at nickel–antimony doped tin oxide electrode. Chemosphere. 65(7): 1087-1093.
- Daghrir, R., et al. 2013. Photoelectrocatalytic oxidation of chlortetracycline using Ti/TiO2photo-anode with simultaneous H2O2 production. Electro-chem. Acta. 87: 18-31.
- Szpyrkowicz, L., et al. 2005. Tannery wastewater treatment by electro-oxidation coupled with a biological process. J. Appl. Electrochem., 35: 381-390.
- Raju, G.B., et al. 2008. Treatment of wastewater from synthetic textile industry by electrocoagulation–electrooxidation. Chem. Eng. J., 144 (1):51-58
- Zaviska, F., et al. 2011. Experimental design methodology applied to electrochemical oxidation of the herbicide atrazine using Ti/IrO2and Ti/SnO2circular anode electrodes. J. Hazard. Mater., 185 (2-3): 1499-1507.
- El–Ashtoukhy, E-S.Z., et al. 2009. Treatment of paper mill effluents in a batch stirred electrochemical tank reactor. Chem. Eng. J., 146 (2): 205-210.
- Basiri, J., et al. 2011. Removal of acid brown 14 in aqueous media by electrocoagulation: Optimization parameters and minimizing of energy consumption. Desalination. 278: 295-302.
- Chen, G, 2004. Electrochemical technologies in wastewater treatment. Separ. Purif. Tech., 38 (1): 11-41.
- Daskalaki, V.M., et al. 2013. Solar light-induced photo-electrocatalytic degradation of bisphenol-A on TiO2/ITO film anode and BDD cathode. Catalysis Today. 209 :74-78.
- Yavuz, Y. and A.S. Kaporal. 2006. Electrochemical oxidation of phenol in a parallel plate reactor using ruthenium metal oxide electrode. J. Hazard. Mater., 136 (2):296-302.
- Hua, X.S., et al. 2009. A new coral structure TiO2/Ti film electrode applied to photo-electrocatalytic degradation of reactive brilliant red. J. Hazard. Mater., 172(1):256-261.
- Jain, R. and M. Shrivastava. 2008. Photo-catalytic removal of hazardous dye cyanosine from industrial waste using titanium dioxide. J. Hazard. Mater., 152: 216 – 220.
