Gamma-ray assisted synthesis of silver nanoparticles to improve advanced oxidation process for continuous flow catalysis and environmental remediation

• Published in: Journal of materials science. Materials in electronics Vol. 34; no. 26; p. 1811
• Main Authors: Jadhav, Akash P., Gade, M. D., Bagekari, Y. G., Sonawane, A. M., Phatangare, A. B., Gavhane, K. H., Bhadane, M. S., Sidhaye, D. S., Dahiwale, S. S., Bhoraskar, V. N., Dhole, Sanjay D.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.09.2023; Springer Nature B.V
• Subjects: Absorption spectroscopy; Characterization and Evaluation of Materials; Chemical synthesis; Chemistry and Materials Science; Continuous flow; Degradation; Dyes; Environmental restoration; Gamma irradiation; Gamma rays; Hazardous areas; Hydroxyl radicals; Materials Science; Nanoparticles; Optical and Electronic Materials; Oxidation; Radiation; Radiation effects; Remediation; Silver; Spectrum analysis; Wastewater treatment; X-ray diffraction
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-023-11144-9

Dye wastewater released after improper treatment is extremely hazardous to the environment and all living things. As per the mandate, dye wastewater should be treated well in order to prevent any negative impacts after discharge. Herein, a single-step, rapid, and chemical-free radiation-induced approach for the synthesis of silver nanoparticles (AgNPs) was used to enhance the degradation of the Rose Bengal (RB) dye. X-ray diffraction (XRD) results showed the formation of a face-centered cubic structure of AgNPs synthesized at a gamma dose of 135 kGy. TEM image revealed the particle size around 11 nm and is in good agreement with the results of XRD and UV–Vis absorption spectroscopy. These AgNPs were examined for degradation study of RB dye. The RB dye was partially (~ 63%) degraded by bare gamma radiations at a dose of 2.7 kGy; however, synthesized AgNPs coupled with gamma radiations enhanced the degradation rate distinctly and ~ 95% degradation occurred. According to the findings of UV–Vis absorption spectroscopy, the RB dye was degraded and the degradation efficiency could be customized by gamma dose and concentration of AgNPs. The addition of AgNPs prior to gamma irradiation enhances the generation of hydroxyl radicals and the same results were validated by 3D-EEM fluorescence spectroscopy. The radiolytic degradation process of RB dye was found to obey the pseudo-first-order kinetics model. The values of dose constant ( d ) were determined as 0.0012 and 0.00041 Gy −1 for the cases with and without AgNPs, respectively. An increase in degradation rate indicates that the gamma radiation process coupled with the AgNPs is a promising alternative for potential RB dye degradation. This work provides a rapid and effective method for totally degrading textile effluents and has several applications in environmental remediation.