title: Utilization of smart hydrogel-metal composites as catalysis media.
abstract: Various metal nanoparticles such as, Cu, Co, Ni, and Fe were prepared inside poly(1-vinyl imidazole) p(VI) hydrogel by the absorption of the corresponding metal ions from aqueous solutions and the reduction with suitable reducing agents such as NaBH(4) and/or NaOH. TGA and ICP-AES were used to determine the metal particle content of p(VI)-M (M: Cu, Co, and Ni) composites. The prepared hydrogel-metal nanoparticle composites were proven to be resourceful as reaction container for the catalysis of various organic reactions. It was illustrated that p(VI)-M hydrogel-metal composites can be successfully used in the hydrolysis of NaBH(4) for the generation hydrogen form NaBH(4) and NH(3)BH(3). Additionally, p(VI)-M composites were also illustrated in the catalysis of different organic reactions; e.g., these hydrogel-M are very effective in the reduction nitro aromatic compounds such 2-nitrophenol (2-NP) and 4-nitrophenol (4-NP) to their corresponding amine forms in the presence of aqueous NaBH(4). Various parameters in the catalysis of hydrogen production and 4-NP reduction were determined.
authors.affiliation: Canakkale Onsekiz Mart University, Faculty of Sciences and Arts, Chemistry Department, Canakkale, Turkey. sahiner71@gmail.com
authors.forename: Nurettin
authors.initials: N
authors.lastname: Sahiner
authors.forename: Sultan
authors.initials: S
authors.lastname: Butun
authors.forename: Ozgur
authors.initials: O
authors.lastname: Ozay
authors.forename: Burak
authors.initials: B
authors.lastname: Dibek
mesh_terms: D000042:Absorption; D001894:Borohydrides / Q000737:chemistry; D002384:Catalysis; D003035:Cobalt / Q000737:chemistry; D003300:Copper / Q000737:chemistry; D020100:Hydrogels / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry; D006868:Hydrolysis; D007093:Imidazoles / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry; D011145:Polyvinyls / Q000737:chemistry; D013499:Surface Properties
chemical_list: D001894:Borohydrides; D020100:Hydrogels; D007093:Imidazoles; D011145:Polyvinyls; C072974:polyvinylimidazole; D003035:Cobalt; D003300:Copper; D009532:Nickel; D006859:Hydrogen; C025364:sodium borohydride; D007501:Iron