Abstract:
:In this study, poly(N-isopropylmethacrylamide-co-methacrylic acid) microgels prepared by free radical precipitation polymerization were used as micro-reactors for the synthesis and stabilization of silver nanoparticles. UV-Visible spectroscopy, Transmission Electron Microscopy and Fourier-transform infrared spectroscopy were used to characterize both pure and hybrid microgels. The catalytic reduction of 4-nitroaniline was carried out in the presence of hybrid microgels to test their catalytic activity, and the catalysis mechanism was explored by varying the concentrations of reacting species like 4-nitroaniline and NaBH4, as well as the dose of the catalyst. The kinetic data indicates that this reaction follows pseudo-first order. The variation in apparent rate constant (kapp) with respect to NaBH4 concentration also discloses it to be the following Langmuir-Hinshelwood mechanism. The relationship between catalyst concentration and apparent rate constant was found to be increasing in a linear manner. The data obtained also confirmed that silver nanoparticles loaded microgels have the potential to be used as an excellent micro-reactor for selective reduction of 4-nitroaniline to p-phenylenediamine.
journal_name
Environ Technoljournal_title
Environmental technologyauthors
Farooqi ZH,Khalid R,Begum R,Farooq U,Wu Q,Wu W,Ajmal M,Irfan A,Naseem Kdoi
10.1080/09593330.2018.1435737subject
Has Abstractpub_date
2019-06-01 00:00:00pages
2027-2036issue
15eissn
0959-3330issn
1479-487Xjournal_volume
40pub_type
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