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, ss.1567-1582, 2019 (SCI İndekslerine Giren Dergi) identifier identifier

  • 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.