title: Ultra-fast catalytic reduction of dyes by ionic liquid recoverable and reusable mefenamic acid derived gold nanoparticles.
abstract: We synthesized mefenamic acid (MA) derived gold nanoparticles (MA-AuNps) in aqueous solution (MA-Au sol). Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) of the sol at 1, 5, 15 and 60 min showed changes in size and shape of formed AuNps. Fourier Transform Infrared (FTIR) Spectroscopy revealed the interaction between AuNps and MA. Each Au sol exhibited exceptional catalytic activity for the reduction of Methylene Blue (MB), Rose Bengal (RB) and Eosin B (EB) dye individually as well as collectively. However, complete reduction of dye(s) was accomplished by Au sol of 5 min in just 15s. The catalytic performance of Ma-Au sol was far superior to that adsorbed on glass. AuNps were recovered with the help of water insoluble room temperature ionic liquid and reused with enhanced catalytic potential. This finding is a novel, rapid and highly economical alternative for environmental safety against pollution by dyes and extendable for control of other reducible contaminants as well.
authors.affiliation: National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro 76080, Pakistan.
authors.forename: Syeda Sara
authors.initials: SS
authors.lastname: Hassan
authors.lastname: Sirajuddin
authors.forename: Amber Rehana
authors.initials: AR
authors.lastname: Solangi
authors.forename: Mohammad Hassan
authors.initials: MH
authors.lastname: Agheem
authors.forename: Yasmeen
authors.initials: Y
authors.lastname: Junejo
authors.forename: Nazar Hussain
authors.initials: NH
authors.lastname: Kalwar
authors.forename: Zulfiqar Ali
authors.initials: ZA
authors.lastname: Tagar
mesh_terms: D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000191:economics / Q000379:methods*; D010697:Eosine I Bluish; D005452:Fluoresceins / Q000737:chemistry; D006046:Gold; D052578:Ionic Liquids; D008528:Mefenamic Acid; D053768:Metal Nanoparticles / Q000737:chemistry*; D008751:Methylene Blue / Q000737:chemistry; D010084:Oxidation-Reduction; D059027:Recycling; D012395:Rose Bengal / Q000737:chemistry
chemical_list: D004396:Coloring Agents; D005452:Fluoresceins; D052578:Ionic Liquids; D012395:Rose Bengal; D008528:Mefenamic Acid; D006046:Gold; D010697:Eosine I Bluish; D008751:Methylene Blue