A novel hydrogel containing thioether group as selective support material for preparation of gold nanoparticles: Synthesis and catalytic applications


ILGIN P., ÖZAY Ö., ÖZAY H.

APPLIED CATALYSIS B-ENVIRONMENTAL, vol.241, pp.415-423, 2019 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 241
  • Publication Date: 2019
  • Doi Number: 10.1016/j.apcatb.2018.09.066
  • Journal Name: APPLIED CATALYSIS B-ENVIRONMENTAL
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.415-423
  • Keywords: Gold nanoparticle, Catalyst, 4-Nitrophenol, Hydrogel, 4-NITROPHENOL REDUCTION, SODIUM-BOROHYDRIDE, GREEN SYNTHESIS, P-NITROPHENOL, EFFICIENT, FACILE, WATER, NI, CO, NANOCOMPOSITE

Abstract

In this study, firstly N-metacrylamido thiomorpholine containing thioether group was synthesized as monomer. Then, p(AAm-co-MTM) hydrogels were prepared from the redox polymerization of acrylamide and N-metacrylamido thiomorpholine as a selective support material. p(AAm-co-MTM) hydrogel-gold nanoparticles were obtained as a result of the reduction of the selectively absorbed gold(III) ions by the hydrogel network using NaBH 4 as reducing agent. All materials were characterized using techniques such as SEM, EDX, TEM and XRD analysis. It was determined that p(AAm-co-MTM)-Au composite material has high catalytic activity for the reduction of 4-nitrophenol. The activation parameters of the reduction reaction of 4-nitrophenol using NaBH4 in the presence of p(AAm-co-MTM)-Au catalyst were calculated as E-a = 38.80 kJ/mol, Delta H-# = 36.16 kJ/mol and Delta S-# = - 161.37 J/mol K.