Ionic liquid hydrogel templates: Bulkgel, cryogel, and microgel to be used for metal nanoparticle preparation and catalysis
[ X ]
Tarih
2015
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Pergamon-Elsevier Science Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Here, we report the preparation of various crosslinked polymeric matrices from 3-acrylami dopropyl)-trimethylammonium chloride as p(APTMACl) ionic liquid hydrogels in the forms of bulk gel, cryogel, and microgel. Their utilization for in situ metal nanoparticle synthesis of Co and Ni, and then the comparison of catalytic performances of these materials in the reduction of 4-nitrophenol (4-NP), 4-nitroaniline (4-NA), and 4-nitrobenzaldehyde (4-NBA) to the corresponding amine forms of 4-AP, 4-AA, and 4-ABA, respectively, are investigated. As the polymeric hydrogel matrices are inherently positively charged, the metal salts of CoCl2 and NiCl2 were loaded into hydrogel matrices from the corresponding metal salt solution in ethanol. It was found that morphology and sizes of p(APTMACl) ionic liquid hydrogel materials played a great role in catalytic performances for the nitro compounds. The effect of temperature and kinetic parameters of different polymeric matrices for the reduction of 4-NP to 4-AP was investigated. The activation energies for bulk gel, cryogel, and microgel were calculated as 44.74, 34.02, and 40.7 kJ mol(-1), respectively. (C) 2015 Elsevier Ltd. All rights reserved.
Açıklama
Anahtar Kelimeler
Hydrogel/cryogel, Microgel/nanogel, Polymeric ionic liquid, Ionic liquid composite catalysts, Nitro compound reduction
Kaynak
European Polymer Journal
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
70
