title: Reduced graphene oxide nanosheets decorated with Au-Pd bimetallic alloy nanoparticles towards efficient photocatalytic degradation of phenolic compounds in water.
abstract: Reduced graphene oxide nanosheets decorated with Au-Pd bimetallic alloy nanoparticles are successfully prepared via a chemical approach consisting of reducing the metal precursors using ascorbic acid as reductant at an elevated temperature. The prepared nanocomposite is employed as a photocatalyst for the degradation of organic contaminants such as phenol, 2-chlorophenol (2-CP), and 2-nitrophenol (2-NP). The complete degradation of phenol is achieved after 300 min under natural sunlight irradiation whereas the degradation of 2-CP and 2-NP is completed after 180 min. The activity of the photocatalyst is evaluated considering several parameters such as the initial phenol concentration, the photocatalyst loading, and the pH of the solution. The degradation kinetics of all the compounds is carefully studied and found to follow a linear Langmuir-Hinshelwood model. Furthermore, the reusability of the photocatalyst is successfully achieved up to five cycles and the catalyst exhibits an excellent stability.
authors.affiliation: Materials Science Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam, India. mnshrdas@yahoo.com and Academy of Scientific and Innovative Research, India.
authors.forename: Gitashree
authors.initials: G
authors.lastname: Darabdhara
authors.affiliation: Materials Science Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam, India. mnshrdas@yahoo.com and Academy of Scientific and Innovative Research, India.
authors.forename: Purna K
authors.initials: PK
authors.lastname: Boruah
authors.affiliation: Materials Science Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam, India. mnshrdas@yahoo.com and Academy of Scientific and Innovative Research, India.
authors.forename: Priyakshree
authors.initials: P
authors.lastname: Borthakur
authors.affiliation: Materials Science Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam, India. mnshrdas@yahoo.com and Academy of Scientific and Innovative Research, India.
authors.forename: Najrul
authors.initials: N
authors.lastname: Hussain
authors.affiliation: Materials Science Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, Assam, India. mnshrdas@yahoo.com and Academy of Scientific and Innovative Research, India.
authors.forename: Manash R
authors.initials: MR
authors.lastname: Das
authors.affiliation: Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia. alshehri@ksu.edu.sa.
authors.forename: Tansir
authors.initials: T
authors.lastname: Ahamad
authors.affiliation: Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia. alshehri@ksu.edu.sa.
authors.forename: Saad M
authors.initials: SM
authors.lastname: Alshehri
authors.affiliation: National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Victor
authors.initials: V
authors.lastname: Malgras
authors.affiliation: Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan. kevinwu@ntu.edu.tw.
authors.forename: Kevin C-W
authors.initials: KC
authors.lastname: Wu
authors.affiliation: National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Yamauchi
mesh_terms: D000497:Alloys; D002384:Catalysis; D006046:Gold; D006108:Graphite / Q000737:chemistry; D007700:Kinetics; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D053761:Nanocomposites / Q000737:chemistry / Q000648:ultrastructure; D010084:Oxidation-Reduction; D010165:Palladium; D010636:Phenols / Q000737:chemistry* / Q000528:radiation effects*; D055668:Photochemical Processes; D010782:Photolysis; D062065:Wastewater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000528:radiation effects*
chemical_list: D000497:Alloys; D006046:Gold; D006108:Graphite; D010165:Palladium; D010636:Phenols; D062065:Wastewater; D014874:Water Pollutants, Chemical