Abstract

Shujit Chandra Paul¹, Snahasish Bhowmik¹, Mithun Rani Nath¹, Md. Shafiul Islam^1,2, Saurav Kanti Paul¹, Jahrun Neazi¹, Tania Sabnam Binta Monir¹, Sanchita Dewanjee¹ and Mohammed Abdus Salam³

DOI : http://dx.doi.org/10.13005/ojc/360301

Green synthesis of nanoparticles is more preferable because of its flexibility in preparation as well as its capability to avoid utilization of toxic chemicals. This study was designed to synthesize silver nanoparticles from plant leaves of Calendula officinalis for utilizing it for the degradation of commonly used dyes. The maximum absorption of UV-Vis light at 436nm ensured the synthesis of silver nanoparticle. The various reducing agent present in plant leaves extract cause the formation of silver nanoparticles as ensured by the FTIR. The morphology study showed that the synthesized nanoparticles were 50-60 nm and 140-150 nm in size for 1mM and 2mM silver nanoparticles (Ag NPs) respectively. It has also been observed that the synthesized nanoparticles possess a high catalytic activity for the degradation of both methylene blue and methyl orange. The degradation data ensured that the reaction rate of degradation is size dependent and the highest degradation percentage (69.79% within 5 minutes), degradation rate (0.18 ± 0.03 min-1), half-life (T₅₀=3.85 min) and 80% degradation (T₈₀= 8.94 min) was observed for 1mM Ag NPs in case of methyl orange.

Calendula Officinalis; Degradation; Green-Synthesis; Methylene Blue; Methyl Orange; Silver Nanoparticles

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