Thiourea-Isocyanate-Based Covalent Organic Frameworks with Tunable Surface Charge and Surface Area for Methylene Blue and Methyl Orange Removal from Aqueous Media

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dc.authoridŞahiner, Nurettin / 0000-0003-0120-530X
dc.authoridSağbaş Suner, Selin / 0000-0002-3524-0675
dc.authoridDemirci, Şahin / 0000-0001-7083-1481
dc.authoridYılmaz, Selehattin / 0000-0003-4607-3523
dc.contributor.authorSağbaş Suner, Selin
dc.contributor.authorDemirci, Şahin
dc.contributor.authorSutekin, Duygu S.
dc.contributor.authorYılmaz, Selehattin
dc.contributor.authorŞahiner, Nurettin
dc.date.accessioned2025-01-27T21:05:30Z
dc.date.available2025-01-27T21:05:30Z
dc.date.issued2022
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractA thiourea hexamethylene diisocyanate covalent organic framework (TH COF) was synthesized by adjusting the surface charge and surface area. The surface charge value of TH COF, -3.8 +/- 0.5 mV, can be changed to -29.1 +/- 0.4 mV by treatment with NaOH (dp-TH) and 17.1 +/- 1.0 mV by treatment with HCl (p-TH). Additionally, the surface area of TH COF was 39.3 m(2)/g, whereas the surface area of dp-TH COF and p-TH COF structures were measured as 41.4 m(2)/g and 42.5 m(2)/g, respectively. However, the COF structure had a better adsorption capability with acid and base treatments, e.g., dp-TH COF absorbed 5.5 +/- 0.3 mg/g methylene blue (MB) dye, and p-TH COF absorbed 25.9 +/- 1.4 mg/g methyl orange (MO) dye from 100 mL 25 ppm aqueous dye solutions, thereby increasing the MB and MO absorption amounts of the TH COF structure. Furthermore, by calculating the distribution, selectivity, and relative selectivity coefficients, the absorption capacity order was determined as dp-TH > TH > p-TH COFs for the MB dye, whereas it was p-TH > TH > dp-TH COFs for the MO dye. Finally, the reusability of dp-TH COF for MB absorption and p-TH COF for MO absorption were investigated. After five repeated uses, dp-TH COF retained 64.6 +/- 3.7% of its absorption ability, whereas p-TH COF preserved 79.7 +/- 3.2% of its absorption ability relative to the initial absorption amount.
dc.description.sponsorshipScientific Research Commission of Canakkale Onsekiz Mart University [FBA-2016-727]
dc.description.sponsorshipThe Scientific Research Commission of Canakkale Onsekiz Mart University FBA-2016-727 is greatly acknowledged.
dc.identifier.doi10.3390/mi13060938
dc.identifier.issn2072-666X
dc.identifier.issue6
dc.identifier.pmid35744552
dc.identifier.scopus2-s2.0-85132287801
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.3390/mi13060938
dc.identifier.urihttps://hdl.handle.net/20.500.12428/27680
dc.identifier.volume13
dc.identifier.wosWOS:000816156700001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.indekslendigikaynakPubMed
dc.language.isoen
dc.publisherMdpi
dc.relation.ispartofMicromachines
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20250125
dc.subjectporous coordination polymers
dc.subjectcovalent organic framework
dc.subjectthiourea-isocyanate
dc.subjectabsorbent
dc.subjectdye removal
dc.titleThiourea-Isocyanate-Based Covalent Organic Frameworks with Tunable Surface Charge and Surface Area for Methylene Blue and Methyl Orange Removal from Aqueous Media
dc.typeArticle

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