Use of Cyclea peltata mediated gold nanospheres for adsorptive degradation of methyl green dye

Sneha Nayak, Louella Concepta Goveas, Raja Selvaraj, Srinivas Mutalik, Shyama Prasad Sajankila

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, gold nanospheres were synthesized due to catalytic reduction of gold ions by phytochemicals of Cyclea peltata leaf extract (CPAuNPs) in 5 h and subsequently used for removal of methyl green (MG) dye. CPAuNPs were characterized by UV–Visible spectrophotometry, scanning electron microscopy (SEM), energy-dispersive X ray spectroscopy (EDAX), Fourier Transformed Infrared Spectroscopy (FT-IR), X-Ray Diffraction (XRD) and BET analysis. CPAuNPs were spherical, of size 25.73–41.69 nm with SPR peak at 543 nm. CPAuNPs were crystalline in nature and could adsorb 86.02 ± 0.12 % of 50 mg/L MG post one factor at a time analysis. Adsorption followed pseudo-second-order kinetics (k1 = 4.43E−03 g/mg.h), was observed as multilayer chemisorption as the equilibrium data best fitted Freundlich isotherm (R2 = 0.856). Upon interaction of MG by CPAuNPs, hydroxylation of MG lead to formation of crystal violet by attack of N-ethyl N N-Dimethyl ammonium group by hydroxide ions, as evident from LCMS chromatograms.

Original languageEnglish
Article number101261
JournalBioresource Technology Reports
Volume20
DOIs
Publication statusPublished - 12-2022

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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