Degradation of salicylic acid coordinated to Fe3O4 nanoparticles by H2O2
Year: 2024
Type: article
Abstract: Salicylic acid (SA) has strong tendency to form complexes with iron (III). Depending upon the concentrations of SA, the complexes formed are FeR + , FeR 2 + , FeR 3 2 + where R represents salicylate ion ( - OC₆H₄COO - ). Fe 3 O 4 nanoparticles binds with the salicylate ions through the sites having Fe 3+ and at the site containing Fe 2 + reacts with H 2 O 2 to produces OH* radicals. The OH* radicals oxidise the salicylic acid attached to Fe 3 O 4 nanoparticles. Thus, the degradation occurs through the formation of SA-Fe 3 O 4 nanoparticles complexes and then followed by the reaction with H 2 O 2 at the nanoparticle site. FT-IR, TGA were used to confirm the synthesis of Fe 3 O 4 nanoparticles as well as to investigate SA-Fe 3 O 4 nanoparticles complex formation and the degradation of the complex by H 2 O 2 . Spectrophotometric studies were employed for the monitoring of the degradation of SA at the surface. Here, the nanoparticles act as platform to which both the reactants SA and H 2 O 2 get activated and the degradation reaction occurs. The concentrations of SA, H 2 O 2 , nanoparticle dosage, surfactants and polymers were changed and the % degradation were noted. It has been observed that the degradation percentage decreased with the increase in nanoparticle dosage, [surfactant] and [polymers]. The [H 2 O 2 ] and [HClO 4 ] gave peaked-like curve for the degradation of SA for the plot of % degradation versus concentrations of H 2 O 2 and HClO 4 . Degradation of SA was observed maximum at [H 2 O 2 ](= 8.0 × 10 −4 mol dm −3 ) and at [HClO 4 ] (= 1.0 × 10 −2 mol dm −3 ).
Authors: Tooba Khan, M.Z.A. Rafiquee
Institution: Aligarh Muslim University
Language: English
Subfield: Water Science and Technology
Field: Environmental Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,400
Funder: University Grants Commission
OpenAlex ID: W4404723292