The Use of Metal Nanoparticle-Embedded Poly(ethyleneimine) Composite Microgel in the Reduction of Nitrophenols

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dc.authoridDemirci, Şahin / 0000-0001-7083-1481
dc.authoridŞahiner, Nurettin / 0000-0003-0120-530X
dc.contributor.authorDemirci, Şahin
dc.contributor.authorŞahiner, Nurettin
dc.date.accessioned2025-01-27T20:20:12Z
dc.date.available2025-01-27T20:20:12Z
dc.date.issued2015
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractMetal nanoparticles such as Ni, Cu, and Co were prepared within polyethyleneimine (PEI) microgels and were used in the reduction of 4-nitrophenol (4-NP) and 2-nitrophenol (2-NP) to 4-aminophenol (4-AP) and 2-aminophenol (2-AP). The metal nanoparticle content of the prepared PEI-M composite catalyst system (M=Co, Ni, and Cu) was increased by multiple loading and reduction cycles into PEI microgels to provide faster and better reduction of 4-NP and 2-NP. The TOF value increased to 1.48 from 0.353 (mol 4-NP (mol catalyst min)(-1)) for 4-NP reduction catalyzed by PEI-Ni after three cycles of metal loading and reduction. The effect of temperature on 4-NP and 2-NP reductions catalyzed by PEI-M illustrated that higher temperature resulted in very fast reductions, e.g., at 70 degrees C 4-NP and 2-NP reduction by PEI-Ni resulted in very fast reduction times of 1.2 and 0.67 min to 4-AP and 2-AP, respectively. The activation parameters, such as energy, entropy, and enthalpy, were also calculated and mild activation energies of 38.8 and 46.0 kJ mol(-1) for 4-NP and 2-NP catalyzed by PEI-Ni were found, respectively, in comparison to similar studies in the literature. Moreover, it was demonstrated that PEI-Ni microgels are reusable five times consecutively, with almost 100 % conversion and 100 % of their catalytic activity.
dc.description.sponsorshipScientific and Technological Research Council of Turkey [110 T649]
dc.description.sponsorshipThis work is supported by the Scientific and Technological Research Council of Turkey (110 T649).
dc.identifier.doi10.1007/s11270-015-2332-7
dc.identifier.issn0049-6979
dc.identifier.issn1573-2932
dc.identifier.issue3
dc.identifier.scopus2-s2.0-84930681306
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1007/s11270-015-2332-7
dc.identifier.urihttps://hdl.handle.net/20.500.12428/21616
dc.identifier.volume226
dc.identifier.wosWOS:000351102400039
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer
dc.relation.ispartofWater Air and Soil Pollution
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectPEI microgel/nanogel composites
dc.subjectMicrogel/hydrogel metal catalyst systems
dc.subject4-/2-Nitrophenol
dc.subjectOrganic compound reduction
dc.titleThe Use of Metal Nanoparticle-Embedded Poly(ethyleneimine) Composite Microgel in the Reduction of Nitrophenols
dc.typeArticle

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