Facile synthesis of hydrogel-nickel nanoparticle composites and their applications in adsorption and catalysis


SHAFIQ Z., AJMAL M., KIRAN S., ZULFIQAR S., YASMEEN G., IQBAL M., ...Daha Fazla

PURE AND APPLIED CHEMISTRY, cilt.91, sa.10, ss.1567-1582, 2019 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 91 Konu: 10
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1515/pac-2018-1201
  • Dergi Adı: PURE AND APPLIED CHEMISTRY
  • Sayfa Sayıları: ss.1567-1582

Özet

Homopolymer bulk hydrogel of methacrylic acid was synthesized through a new single-step facile rout and used as a template for the fabrication of nickel (Ni) nanoparticles and as adsorbent to remove methylene blue (MB) and Rhodamine-6G (Rh-6G) from water. The Ni nanoparticles containing composite hydrogel was applied as catalyst for the degradation of a nitro compound. The carboxylic groups acted as highly efficient adsorption sites and their high degree was responsible for the removal of huge amounts of MB and Rh-6G from water. The maximum adsorption capacity of poly (methacrylic acid) hydrogel was 685 mg g(-1) for MB and 1571 mg g(-1) for Rh-6G. The adsorption data of MB was best fitted with Langmuir adsorption isotherm while that of Rh-6G with Temkin adsorption isotherm. Catalytic property of prepared hydrogel integrated with Ni nanoparticles was evaluated by using it as a catalyst for the degradation of 4-nitrophenol (4-NP). The apparent rate constant (k(app)) observed in this study for the reduction of 4-NP was as high as 0.038 min(-1). It was found that this catalyst system can be used repetitively with a slight decrease in catalytic activity.