Utilization of Smart Hydrogel-Metal Composites as Catalysis Media

ŞAHİNER N., Butun S., ÖZAY Ö., Dibek B.

JOURNAL OF COLLOID AND INTERFACE SCIENCE, vol.373, pp.122-128, 2012 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 373
  • Publication Date: 2012
  • Doi Number: 10.1016/j.jcis.2011.08.080
  • Journal Name: JOURNAL OF COLLOID AND INTERFACE SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.122-128
  • Keywords: Hydrogels, Soft network, Polymeric network, Catalysis, Composite, P(1-vinyl imidazole), MESOPOROUS SBA-15 SILICA, PLATINUM NANOPARTICLES, REDUCTION, NITROPHENOLS, NETWORKS, REACTOR, GROWTH, ROUTE
  • Çanakkale Onsekiz Mart University Affiliated: Yes

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 NaBH4 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 NaBH4 for the generation hydrogen form NaBH4 and NH3BH3. 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 NaBH4. Various parameters in the catalysis of hydrogen production and 4-NP reduction were determined.

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 NaBH4 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 NaBH4 for the generation hydrogen form NaBH4 and NH3BH3. 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 NaBH4. Various parameters in the catalysis of hydrogen production and 4-NP reduction were determined. 2011 Elsevier Inc. All rights reserved.