title: One-pot, water-based and high-yield synthesis of tetrahedral palladium nanocrystal decorated graphene.
abstract: This paper reports a facile, water-based and one-pot synthesis of tetrahedral Pd nanocrystals (Pd-TNPs) with high yield and good size monodispersity supported on reduced graphene oxide (RGO) nanosheets via a co-chemical reduction method. The key synthetic strategy employed a positively charged polyallylamine-Pd(II) complex (PAH-Pd(II)) with un-coordinated amine groups as a linker molecule to immobilize Pd(II) species on the negatively charged graphene oxide (GO) surface through electrostatic interaction. As characterized by transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Raman spectroscopy, thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS) techniques, well-defined Pd-TNPs with an average size of 9 nm were uniformly distributed on the RGO surface. The as-prepared Pd-TNPs/RGO nanohybrid with excellent colloidal stability in aqueous solution exhibits superior catalytic activity towards the degradation of methylene blue (MB) compared to both unsupported Pd-TNPs and Pd black. Thus, the resultant Pd-TNPs/RGO nanohybrid, as a promising heterogeneous catalyst, might have wide potential applications in water-based catalysis systems for the future.
authors.affiliation: Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046, PR China.
authors.forename: Gengtao
authors.initials: G
authors.lastname: Fu
authors.forename: Lin
authors.initials: L
authors.lastname: Tao
authors.forename: Min
authors.initials: M
authors.lastname: Zhang
authors.forename: Yu
authors.initials: Y
authors.lastname: Chen
authors.forename: Yawen
authors.initials: Y
authors.lastname: Tang
authors.forename: Jun
authors.initials: J
authors.lastname: Lin
authors.forename: Tianhong
authors.initials: T
authors.lastname: Lu
mesh_terms: D002384:Catalysis; D006108:Graphite / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D010165:Palladium / Q000737:chemistry*; D011073:Polyamines / Q000737:chemistry; D055672:Static Electricity; D014867:Water / Q000737:chemistry
chemical_list: D010087:Oxides; D011073:Polyamines; D014867:Water; C063994:polyallylamine; D010165:Palladium; D006108:Graphite