The resourcefulness of p(4-VP) cryogels as template for in situ nanoparticle preparation of various metals and their use in H2 production, nitro compound reduction and dye degradation

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dc.authoridŞahiner, Nurettin / 0000-0003-0120-530X
dc.authoridYıldız, Sema / 0000-0003-4760-164X
dc.contributor.authorŞahiner, Nurettin
dc.contributor.authorYıldız, Sema
dc.contributor.authorAl-Lohedan, Hamad
dc.date.accessioned2025-01-27T20:41:01Z
dc.date.available2025-01-27T20:41:01Z
dc.date.issued2015
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractPoly(4-vinylpyridine) (p(4-VP)) cryogels were synthesized under cryogenic conditions (T=-18 degrees C) and were converted to positively charged forms by modifying with different alkyl dihalides of variable chain lengths such as 1,2-dibromoethane (1,2 BE), 1,4-dibromobutane (1,4 BB), 1,6-dibromohexane (1,6 BH), and 1,8-dibromooctane (1,8 BO). The chemical structure of synthesized supermacroporous 1,4 BB-p(4-VP) cryogels were confirmed by FT-IR spectroscopy. The 1,4 BB modified-poly(4-vinylpyridine) (1,4 BB-p(4-VP)) cryogels were used as template for in situ metal nanoparticle preparation as 1,4 BB-p(4-VP)-M (M: Co, Ni, Cu, and Fe) using chloride salts of Co, Ni, Cu, and Fe in ethanol. These metal-nanoparticle macroporous cryogel composites were employed in H-2 generation from hydrolysis of sodium borohydride (NaBH4). Metal nanoparticles embedded 1,4 BB-p(4-VP)-M were visualized by TEM, and thermal behavior of 1,4 BB-p(4-VP) cryogels were done by thermogravimetric analyzer (TGA). The metal content of 1,4 BB-p(4-VP)-M was estimated via atomic absorption spectroscopy (AAS). Multiple metal salt loading and reduction cycles were performed for 1,4 BB-p(4-VP) cryogels to increase the amount of contained Co. The activation energies, enthalpy, and entropy for NaBH4 hydrolysis catalyzed by 1,4 BB-p(4-VP)-Co cryogel composites were determined as 47.6 kJ (mol)(-1), 46.2 kJ (mol K)(-1), and 146.91 (mol K)(-1), respectively. The cryogel network embedded with Co, Ni, Cu, and Fe nanoparticles was also used as a catalyst in the reduction of 4-nitrophenol (4-NP) in an aqueous solution in excess amount of NaBH4. Furthermore, the Cu metal nanoparticle-containing 1,4 BB-p(4-VP) cryogel was utilized in the degradation of methylene blue (MB). (C) 2014 Elsevier B.V. All rights reserved.
dc.description.sponsorshipKing Saud University, Deanship of Scientific Research, Research Chair
dc.description.sponsorshipThis project was supported by King Saud University, Deanship of Scientific Research, Research Chair.
dc.identifier.doi10.1016/j.apcatb.2014.11.027
dc.identifier.endpage154
dc.identifier.issn0926-3373
dc.identifier.issn1873-3883
dc.identifier.scopus2-s2.0-84911893970
dc.identifier.scopusqualityQ1
dc.identifier.startpage145
dc.identifier.urihttps://doi.org/10.1016/j.apcatb.2014.11.027
dc.identifier.urihttps://hdl.handle.net/20.500.12428/23967
dc.identifier.volume166
dc.identifier.wosWOS:000348753400017
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofApplied Catalysis B-Environmental
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectSuper porous cryogel/hydrogel composite catalyst
dc.subjectEnvironmentally benign catalysts
dc.subjectH-2 production
dc.subjectNitro compound reduction
dc.subjectDye degradation
dc.titleThe resourcefulness of p(4-VP) cryogels as template for in situ nanoparticle preparation of various metals and their use in H2 production, nitro compound reduction and dye degradation
dc.typeArticle

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