Abstract
Thermosensitive poly(NIPAAm-co-AMPS) hydrogels were prepared by copolymerization of N-isopropyl acrylamide (NIPAAm) and 2-acrylamido-2-methyl 1-propansulfonic acid (AMPS) by employing N,N′-methylenebis(acrylamide) (BIS) as cross-linker. Uniformly distributed silver nanoparticles (Ag-NP) were obtained within hydrogel networks as nanoreactors via in situ reduction of silver nitrate (AgNO3) using sodium borohydride (NaBH4) as reducing agent. The catalytic properties of Ag-NP-poly(NIPAAm-co-AMPS) hydrogels presented obvious temperature dependence upon the reduction of 4-nitrophenol (4-NP) in aqueous solution. Interestingly, the addition of α-cyclodextrin (α-CD) could further enhance the reduction rate and change the associated activation parameters. This advanced catalytic system with temperature dependence and α-CD synergetic effect presented promising applications in catalytic chemistry.
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Acknowledgments
We gratefully acknowledge NSFC Grants (51403062 and 51273063), the Australian Research Council Grant DP110103177, China Postdoctoral Science Foundation (2013 M541485), 111 Project Grant (B08021), the Fundamental Research Funds for the Central Universities, and the Open Project of Engineering Research Center of Materials-Oriented Chemical Engineering of Xinjiang Bingtuan (2015BTRC001) for support of this work.
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Wang, M., Wang, J., Wang, Y. et al. Synergetic catalytic effect of α-cyclodextrin on silver nanoparticles loaded in thermosensitive hydrogel. Colloid Polym Sci 294, 1087–1095 (2016). https://doi.org/10.1007/s00396-016-3867-x
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DOI: https://doi.org/10.1007/s00396-016-3867-x