Bio-Synthesis, Characterization and Catalytic Potential of Nanoparticles for Dyes Removal

Document Type : Research Paper


Department of Chemistry, Faculty of Science, University of Karachi, 75270, Karachi, Pakistan


   The kinetics of catalytic degradation of methyl violet using biosynthesized silver   nanoparticles was studied spectrophotometrically. The biosynthesis process synthesized the silver nanoparticles using Azadirachta indica leaves extract and characterized by spectral techniques. Uv spectra showed the reduction of silver nitrate into silver nanoparticles. Atomic force microscopy analysis showed the configuration, morphology, and size of silver nanoparticles. It was observed silver nanoparticles are spherical and produced in high percentages. The kinetics of degradation of methyl violet with silver nanoparticles was analyzed by observing the change in absorbance with respect to time at 583nm as a function of pH, concentration of nanoparticle, catalyst, and temperature. The reaction follows pseudo-first-order kinetics depends on the concentration of nanoparticles and is independent of the concentration of methyl violet. The degradation process was found to be more favorable at low temperatures and in the basic medium at pH 11 The activation parameters are also evaluated.


Main Subjects

  1. Daneshvar, N., Ayazloo, M., Khataee, A. R., Pourhassan, M., “Biological decolorization of dye solution containing Malachite Green by microalgae Cosmarium sp.”, Bioresource Technology, 98(6) (2007) 1176-1182.
  2. Natarajan, S., Bajaj, H. C., Tayade, R. J., “Recent advances based on the synergetic effect of adsorption for removal of dyes from waste water using photocatalytic process”, Journal of Environmental Sciences, 65 (2018) 201-222.
  3. Zucca, P., Cocco, G., Sollai, F., Sanjust, E., “Fungal laccases as tools for biodegradation of industrial dyes”, Biocatalysis, 1(1) (2016) 82-108.
  4. Entwistle, C. D., Marder, T. B., “Applications of three-coordinate organoboron compounds and polymers in optoelectronics”, Chemistry of Materials, 16(23) (2004) 4574-4585.
  5. Dong, M., Babalhavaeji, A., Samanta, S., Beharry, A. A., Woolley, G. A., “Red-shifting azobenzene photoswitches for in vivo use”, Accounts of Chemical Research, 48(10) (2015) 2662-2670.
  6. Stromberg, J. R., Marton, A., Kee, H. L., Kirmaier, C., Diers, J. R., Muthiah, C., Taniguchi, M., Lindsey, J. S., Bocian, D. F., Meyer, G. J., Holten, D., “Examination of tethered porphyrin, chlorin, and bacteriochlorin molecules in mesoporous metal-oxide solar cells”, The Journal of Physical Chemistry C, 111(42) (2007) 15464-15478.
  7. Chequer, F. D., De Oliveira, G. R., Ferraz, E. A., Cardoso, J. C., Zanoni, M. B., De Oliveira, D. P., “Textile dyes: dyeing process and environmental impact”, Eco-friendly textile dyeing and finishing, 6(6) (2013) 151-176.
  8. Jani, M. M., “Studies on intrinsic microbial populations of contaminated environment and biodegradative potentials”, Doctoral dissertation, Saurashtra University.
  9. Duxbury, D. F., “The sensitized fading of triphenylmethane dyes in polymer films: Part 1”, Dyes and pigments, 25(2) (1994) 131-166.
  10. Shindhal, T., Rakholiya, P., Varjani, S., Pandey, A., “Ngo HH, Guo W, Ng HY, Taherzadeh MJ. A critical review on advances in the practices and perspectives for the treatment of dye industry wastewater”, Bioengineered, 12(1) (2021) 70-87.
  11. Kim, B. H., Hackett, M. J., Park, J., Hyeon, T., “Synthesis, characterization, and application of ultrasmall nanoparticles”, Chemistry of Materials, 26(1) (2014) 59-71.
  12. Scheu, M., Veefkind, V., Verbandt, Y., Galan, E. M., Absalom, R., Förster, W., “Mapping nanotechnology patents: The EPO approach”, World Patent Information, 28(3) (2006) 204-211.
  13. Mittal, J., Batra, A., Singh, A., Sharma, M. M., “Phytofabrication of nanoparticles through plant as nanofactories”, Advances in Natural Sciences: Nanoscience and Nanotechnology, 5(4) (2014) 043002.
  14. Kumari, M. M., Ananthalakshmi, R., Indo–Asian Journal of Multidisciplinary Research (IAJMR).
  15. Eneh, O. C., “Managing Nigeria's environment: The unresolved issues”, Journal of Environmental Science and Technology, 4(3) (2011) 250-263.
  16. Pereira, L., Alves, M., “Dyes-environmental impact and remediation in environmental protection strategies for sustainable development”, Springer, Dordrecht, (2012).
  17. Ali, H., “Biodegradation of synthetic dyes-a review”, Water, Air, & Soil Pollution, 213(1) (2010) 251-273.
  18. Liu, Y., Jin, W., Zhao, Y., Zhang, G., Zhang, W., “Enhanced catalytic degradation of methylene blue by α-Fe2O3/graphene oxide via heterogeneous photo-Fenton reactions”, Applied Catalysis B: Environmental, 206 (2017) 642-652.
  19. Tyagi, S., Rawtani, D., Khatri, N., Tharmavaram, M., “Strategies for nitrate removal from aqueous environment using nanotechnology: a review”, Journal of Water Process Engineering, 21 (2018) 84-95.
  20. Vasantharaj, S., Sathiyavimal, S., Saravanan, M., Senthilkumar, P., Gnanasekaran, K., Shanmugavel, M., Pugazhendhi, A., “Synthesis of ecofriendly copper oxide nanoparticles for fabrication over textile fabrics: characterization of antibacterial activity and dye degradation potential”, Journal of Photochemistry and Photobiology B: Biology, 191 (2019) 143-149.