title: Palladium nanoparticles synthesized by reducing species generated during a successive acidic/alkaline treatment of sucrose.
abstract: Uniform spherical palladium nanoparticles with an average particle size of 4.3±0.5 nm were successfully synthesized by reducing H2PdCl4 with intermediates in situ generated during a successive acidic/alkaline treatment of sucrose. A successive acidic/alkaline treatment plays an important role on converting the non-reducing sucrose into efficient reducing species containing aldehyde functionality. The Benedict's test corroborates the development and vanishing of the in situ generated reducing species upon prolonged degradation. An increase in alkalinity drastically improves the reduction efficiency. ATR FT-IR spectroscopy indicated spontaneous development of carboxylate after the alkaline treatment. Under the employed condition, small organic species with carbonyl groups (aldehyde, acid, and acid salt) were generated through the sucrose degradation before being oxidized to carbonate after an hour of the treatment. Sucrose was completely decomposed into carbonate after a 24-h successive acidic/alkaline treatment. The synthesized palladium nanoparticles express a good catalytic activity in the decolorization process of Congo red by sodium borohydride.
authors.affiliation: Sensor Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Bangkok 10330, Thailand.
authors.forename: Lunjakorn
authors.initials: L
authors.lastname: Amornkitbamrung
authors.affiliation: Sensor Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Bangkok 10330, Thailand.
authors.forename: Prompong
authors.initials: P
authors.lastname: Pienpinijtham
authors.affiliation: Sensor Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Bangkok 10330, Thailand.
authors.forename: Chuchaat
authors.initials: C
authors.lastname: Thammacharoen
authors.affiliation: Sensor Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Bangkok 10330, Thailand. Electronic address: sanong.e@chula.ac.th.
authors.forename: Sanong
authors.initials: S
authors.lastname: Ekgasit
mesh_terms: D001894:Borohydrides / Q000737:chemistry; D002384:Catalysis; D003116:Color; D003224:Congo Red / Q000737:chemistry; D006851:Hydrochloric Acid / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010165:Palladium / Q000737:chemistry*; D019163:Reducing Agents / Q000737:chemistry*; D012972:Sodium Hydroxide / Q000737:chemistry*; D013052:Spectrometry, X-Ray Emission; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013395:Sucrose / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D001894:Borohydrides; D019163:Reducing Agents; D003224:Congo Red; D012972:Sodium Hydroxide; D013395:Sucrose; D010165:Palladium; C025364:sodium borohydride; D006851:Hydrochloric Acid
keywords: Acid hydrolysis; Alkaline degradation; Nanoparticles; Palladium; Sucrose