title: Photocatalytic degradation of methyl orange dye using silver (Ag) nanoparticles synthesized from Ulva lactuca.
abstract: In this paper, we report on biosynthesis of silver nanoparticles using Ulva lactuca (seaweed) at room temperature along with photocatalytic degradation of methyl orange dye. UV spectral analysis showed peak at 430 nm with special reference to the excitation of surfaces plasmon vibration by silver nanoparticles. FT-IR studies reveal the presence of bioactive functional groups such as phenolic compounds, amines and aromatic ring are found to be the capping and stabilizing agents of nanoparticles. The morphology of silver nanoparticles was found to be spherical and ranges about 48.59 nm as confirmed by HR-SEM. Negative zeta potential value of -34 mV suggests that the nanoparticles are highly stable in colloidal solution. XRD patterns also suggest the occurrence of spherical shaped particles due to the presence of silver ions. Further, photocatalytic degradation of methyl orange was measured spectrophotometrically by using silver as nanocatalyst under visible light illumination. The results revealed that biosynthesized silver nanoparticles using U. lactuca was found to be impressive in degrading methyl orange.
authors.affiliation: Department of Environmental Biotechnology, School of Environmental Sciences, Bharathidasan University, Tiruchirappalli 620024, India. kumar.miracle@gmail.com
authors.forename: P
authors.initials: P
authors.lastname: Kumar
authors.forename: M
authors.initials: M
authors.lastname: Govindaraju
authors.forename: S
authors.initials: S
authors.lastname: Senthamilselvi
authors.forename: K
authors.initials: K
authors.lastname: Premkumar
mesh_terms: D001391:Azo Compounds / Q000737:chemistry / Q000528:radiation effects*; D002384:Catalysis / Q000528:radiation effects; D004396:Coloring Agents / Q000737:chemistry / Q000528:radiation effects*; D008027:Light; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010782:Photolysis / Q000528:radiation effects*; D012834:Silver / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D055672:Static Electricity; D044445:Ulva / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D012834:Silver; C100258:methyl orange