title: Enhanced dechlorination of m-DCB using iron@graphite/palladium (Fe@C/Pd) nanoparticles produced by pulsed laser ablation in liquid.
abstract: In this work, the zero valent Fe (ZVI) and graphite-encapsulated Fe (Fe@C) nanoparticles (NPs) were easily and selectively prepared by a pulsed laser ablation (PLA) method in an aqueous sodium borohydride solution and ascorbic acid dissolved in methanol, respectively. Here, the Fe@C NPs were uniquely synthesized by PLA in methanol, where the solvent is used as both a carbon source for the graphitic layers and solvent, which is very unique. Furthermore, Pd NPs were loaded onto the surface of the Fe@C NPs to prepare bimetallic (Fe@C/Pd) NPs for the enhancement of the degradation efficiency of m-dichlorobenzene (m-DCB). The morphology, crystallinity, and surface composition of the prepared NPs were carefully characterized by high-resolution transmission electron microscopy (HRTEM), energy dispersive x-ray spectrometer (EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The degradation rate of m-DCB using single (Fe and Pd) or bimetallic (Fe/Pd and Fe@C/Pd) NPs were compared by using gas chromatography. Among these NPs produced in this work, the Fe@C/Pd NPs with 1.71 wt % of Pd showed an excellent dechlorination efficiency for m-DCB with 100% degradation within 75 min. The graphitic layer on the Fe NPs played as not only an oxidation resistant for the Fe NPs to surroundings, but also a supporter of the Pd NPs for the enhanced degradation efficiency of m-DCB.
authors.affiliation: Department of Chemistry (BK21 PLUS) and Research Institute of Natural Science, Gyeongsang National University, Jinju, 660-701, Republic of Korea.
authors.forename: Yiseul
authors.initials: Y
authors.lastname: Yu
authors.affiliation: Department of Chemistry (BK21 PLUS) and Research Institute of Natural Science, Gyeongsang National University, Jinju, 660-701, Republic of Korea.
authors.forename: Hyeon Jin
authors.initials: HJ
authors.lastname: Jung
authors.affiliation: Department of Chemistry (BK21 PLUS) and Research Institute of Natural Science, Gyeongsang National University, Jinju, 660-701, Republic of Korea.
authors.forename: Mingyu
authors.initials: M
authors.lastname: Je
authors.affiliation: Department of Chemistry, Chonnam National University, Gwangju, 500-757, Republic of Korea. Electronic address: chc12@chonnam.ac.kr.
authors.forename: Hyun Chul
authors.initials: HC
authors.lastname: Choi
authors.affiliation: Department of Chemistry (BK21 PLUS) and Research Institute of Natural Science, Gyeongsang National University, Jinju, 660-701, Republic of Korea. Electronic address: mychoi@gnu.ac.kr.
authors.forename: Myong Yong
authors.initials: MY
authors.lastname: Choi
mesh_terms: D002384:Catalysis; D002722:Chlorobenzenes / Q000032:analysis* / Q000737:chemistry; D006108:Graphite / Q000737:chemistry*; D054879:Halogenation; D007501:Iron / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*; D010316:Particle Size; D056951:Photoelectron Spectroscopy; D013499:Surface Properties; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry; D018508:Water Purification / Q000379:methods*; D014961:X-Ray Diffraction; D014965:X-Rays
chemical_list: D002722:Chlorobenzenes; D014874:Water Pollutants, Chemical; D010165:Palladium; C042146:1,3-dichlorobenzene; D006108:Graphite; D007501:Iron
keywords: Bimetallic nanoparticles; Chlorinated organic compounds (COCs); Iron nanoparticles (Fe NPs); Iron@Graphite/Palladium nanoparticles (Fe@C/Pd NPs); Pulsed laser ablation in liquid (PLAL); m – Dichlorobenzene (m – DCB)