Gold-Nanoparticle Decorated Monosized Magnetic Polymer Based Catalyst: Reduction of 4-Nitrophenol
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Tarih
2018
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The objective of this study was to fabricate a multifunctional catalyst for removal of environmental pollutants. By this aim, poly(mono-2-(methacryloyloxy)ethyl succinate-co-glycerol dimethacrylate) poly(MMES-co-GDMA) monosized microbeads with carboxyl functionality were synthesized 5 mu m in diameter. Iron oxide nanoparticles were attached onto the polymeric microbeads to obtain superparamagnetic properties for easily collecting them from the reaction medium by using natural magnet. The magnetic polymer microbeads were decorated with gold nanoparticles ca. 15nm in size. The magnetic-monodisperse catalyst carrying gold nanoparticles exhibited several advantages with respect to similar plasmonic catalysts in the form of nanoparticles, like higher aggregation resistance, easier recovery from the reaction medium with natural magnets and reuse of catalyst without leaching gold nanoparticles. The magnetic gold catalyst was characterized by scanning electron microscopy (SEM), vibrating sample magnetometry (VSM) and X-ray diffraction spectrophotometry (XRD). This newly designed catalyst was used to degrade a toxic organic substance, 4-nitrophenol (4-NP) in an aqueous medium. The degradation process of 4-NP to 4-aminophenol (4-AP) was monitored by a UV-Visible spectrophotometer. The effects of reaction conditions, catalyst and organic pollutant concentrations and temperature, on the plasmonic catalytic activity were determined. The results of repetitive trials were successful with high catalytic activity for the reduction of 4-NP to 4-AP form in several minutes by using and reusing the synthesized catalyst.
Açıklama
Anahtar Kelimeler
Reduction of 4-nitrophenol, Gold decoration, Synergistic effect, Heterogeneous catalyst, Magnetically recoverable, Micro, nano particles
Kaynak
Journal of Inorganic and Organometallic Polymers and Materials
WoS Q Değeri
Q3
Scopus Q Değeri
Q1
Cilt
28
Sayı
6
