Enhanced Catalytic Activity in the Reduction of 4-Nitrophenol and 2-Nitrophenol by p(AMPS)-Cu(0) Hydrogel Composite Materials

ŞAHİNER N., ÖZAY Ö.

CURRENT NANOSCIENCE, cilt.8, sa.3, ss.367-374, 2012 (SCI-Expanded)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 8 Sayı: 3
  • Basım Tarihi: 2012
  • Doi Numarası: 10.2174/157341312800620278
  • Dergi Adı: CURRENT NANOSCIENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.367-374
  • Anahtar Kelimeler: Hydrogel reactor, hydrogel-Cu catalyst, 4-nitrophenol reduction, swollen catalyst systems, P-NITROPHENOL, NANOPARTICLES, NI
  • Çanakkale Onsekiz Mart Üniversitesi Adresli: Evet

Özet

Cu(0) metal nanoparticles were prepared inside p(2-acrylamido-2-methyl-1-propansulfonic acid) hydrogel networks. The p(2-acrylamido-2-methyl-1-propansulfonic acid)-Cu composites were used in the reduction of 4-nitrophenol and 2-nitrophenol, as model reactions in the presence of excess NaBH4, and showed excellent catalytic activity. The reduction rate of 4-nitrophenol with p(2-acrylamido-2-methyl-1-propansulfonic acid)-Cu composites, even in the presence of a very low amount of catalyst (1.1 mg Cu(0)) at close to room temperature (30 degrees C), resulted in a very high value (0.1032 min(-1)) in comparison to Co(0) and Ni(0) catalysts prepared under very similar conditions. The kinetic parameters were determined at different reaction temperatures and the activation energies for 4-nitrophenol and 2-nitrophenol were found to be 28.2 and 39.2 kJmol(-1), respectively.

Cu(0) metal nanoparticles were prepared inside p(2-acrylamido-2-methyl-1-propansulfonic acid) hydrogel networks. The p(2- acrylamido-2-methyl-1-propansulfonic acid)-Cu composites were used in the reduction of 4-nitrophenol and 2-nitrophenol, as model reactions in the presence of excess NaBH4, and showed excellent catalytic activity. The reduction rate of 4-nitrophenol with p(2- acrylamido-2-methyl-1-propansulfonic acid)-Cu composites, even in the presence of a very low amount of catalyst (1.1 mg Cu(0)) at close to room temperature (30 °C), resulted in a very high value (0.1032 min-1) in comparison to Co(0) and Ni(0) catalysts prepared under very similar conditions. The kinetic parameters were determined at different reaction temperatures and the activation energies for 4- nitrophenol and 2-nitrophenol were found to be 28.2 and 39.2 kJmol-1, respectively.