Surface modification strategies for nanoparticles based on chitosan and titanium dioxide: Catalytic properties and mechanism for sodium borohydride dehydrogenation in methanol

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dc.authoridSAKA, Cafer/0000-0003-2534-5921
dc.contributor.authorSaka, Cafer
dc.date.accessioned2024-12-24T19:27:08Z
dc.date.available2024-12-24T19:27:08Z
dc.date.issued2024
dc.departmentSiirt Üniversitesi
dc.description.abstractChitosan, which has important functional groups such as amino and hydroxyl, is effectively preferred for application areas. Due to its low cost and high chemical stability, titanium dioxide (TiO2) attracts great attention especially in the fields of environment and energy. Here, the green fabrication of two-stage catalyst particles by facile surface modification strategies was performed. In the first step, a hybrid material was fabricated by dispersing TiO2 nanoparticles on the chitosan polymer matrix by the calcination method. The catalytic performance can be further improved by changing the surface properties and additional defect sites by doping with green non-metallic heteroatoms. In the second stage, protonation with hydrochloric acid, nitrogen doping with ammonia and nitrogen and oxygen doping with nitric acid were applied to improve the surface properties of the hybrid material obtained by the hydrothermal method. These hybrid particles were performed for dehydrogenation (H-2) in methanol of sodium borohydride. The most effective results were obtained with chitosan-TiO2 treated with nitric acid with an HGR value of 10118 mol g(cat)(-1) min(-1). The activation energy (Ea) value was calculated as 39.25 kJmol(-1). XRD, XPS, SEM, EDS, TEM and FTIR analyses were used for the characterization of hybrid catalysts. Besides, the mechanism of H-2 release in methanol using N, O-doped chitosan-TiO2 has been proposed.
dc.identifier.doi10.1016/j.fuel.2023.129552
dc.identifier.issn0016-2361
dc.identifier.issn1873-7153
dc.identifier.scopus2-s2.0-85169336689
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.fuel.2023.129552
dc.identifier.urihttps://hdl.handle.net/20.500.12604/6518
dc.identifier.volume356
dc.identifier.wosWOS:001144679900001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Sci Ltd
dc.relation.ispartofFuel
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241222
dc.subjectChitosan polymer matrix
dc.subjectTitanium dioxide nanoparticles
dc.subjectNitrogen and oxygen doping
dc.subjectSodium borohydride
dc.subjectMethanol
dc.titleSurface modification strategies for nanoparticles based on chitosan and titanium dioxide: Catalytic properties and mechanism for sodium borohydride dehydrogenation in methanol
dc.typeArticle

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