title: Fluorescence quenching and photocatalytic degradation of textile dyeing waste water by silver nanoparticles.
abstract: Silver nanoparticles (Ag NPs) of different sizes have been prepared by chemical reduction method and characterized using UV-vis spectroscopy and transmission electron microscopy (HRTEM). Fluorescence spectral analysis showed that the quenching of fluorescence of textile dyeing waste water (TDW) has been found to decrease with decrease in the size of the Ag NPs. Experimental results show that the silver nanoparticles can quench the fluorescence emission of adsorbed TDW effectively. The fluorescence interaction between Ag NPs (acceptor) and TDW (donor) confirms the Förster Resonance Energy Transfer (FRET) mechanism. Long range dipole-dipole interaction between the excited donor and ground state acceptor molecules is the dominant mechanism responsible for the energy transfer. Furthermore, photocatalytic degradation of TDW was measured spectrophotometrically by using silver as nanocatalyst under UV light illumination. The kinetic study revealed that synthesized Ag NPs was found to be effective in degrading TDW.
authors.affiliation: Department of Physics, Mother Teresa Women's University, Kodaikanal, Tamil Nadu 624101, India.
authors.forename: S R
authors.initials: SR
authors.lastname: Kavitha
authors.affiliation: Department of Physics, Mother Teresa Women's University, Kodaikanal, Tamil Nadu 624101, India. Electronic address: ums10@yahoo.com.
authors.forename: M
authors.initials: M
authors.lastname: Umadevi
authors.affiliation: Department of Animal Nutrition, Veterinary College & Research Institute, TANUVAS, Namakkal, Tamil Nadu 637002, India.
authors.forename: S R
authors.initials: SR
authors.lastname: Janani
authors.affiliation: Department of Zoology, University of Madras, Guindy Campus, Chennai, Tamil Nadu 600025, India.
authors.forename: T
authors.initials: T
authors.lastname: Balakrishnan
authors.affiliation: Department of Zoology, University of Madras, Guindy Campus, Chennai, Tamil Nadu 600025, India.
authors.forename: R
authors.initials: R
authors.lastname: Ramanibai
mesh_terms: D004396:Coloring Agents / Q000737:chemistry*; D005453:Fluorescence; D053768:Metal Nanoparticles / Q000737:chemistry*; D055668:Photochemical Processes; D012834:Silver / Q000737:chemistry*; D013783:Textile Industry; D014466:Ultraviolet Rays; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
chemical_list: D004396:Coloring Agents; D012834:Silver; D062065:Wastewater
keywords: Fluorescence quenching; Kinetic; Photocatalytic degradation; Quantum yield; Silver nanoparticles; Waste water