{
  "abstract": "Urea-derived graphitic carbon nitride (g-C3N4) underwent chemical treatment in a strongly oxidizing H2SO4/HNO3/H2O2 environment, followed by dialysis against water. XRD and SEM measurements revealed significant disruption of the layered polymeric framework, including loss of hydrogen-bond-mediated order, partial depolymerization into melem-based units, and the formation of rod-like melem hydrate superstructures. FTIR spectra indicated that chemical treatment resulted in the loss of the heptazine structure and the emergence of melem/triazine vibrations. Consistent disruption of the C–N framework was also observed in XPS spectra, which showed a reduced contribution of nitrogen species associated with inter-triazine bridging. Mott–Schottky analysis yielded potential values suggesting the presence of additional electronic states in the chemically treated sample. This aligns with EPR spin-trapping results, which showed approximately a 2.5-fold decrease in superoxide radical anion generation upon visible light irradiation compared with the parent compound, attributed to both reduced visible-light absorption and trapping of photogenerated electrons in defect states.",
  "abstract_shown": true,
  "affiliations": [
    "Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, Mike Petrovića Alasa 12–14, Vinča, 11351 Belgrade, Serbia",
    "University of Belgrade, Institute of Chemistry, Technology and Metallurgy, Department of Catalysis and Chemical Engineering, Njegoševa 12, 11000 Belgrade, Serbia",
    "Center for Physical Chemistry of Biological Systems, BioScope Labs, Faculty of Physical Chemistry, University of Belgrade, Studentski trg 12–16, 11158 Belgrade, Serbia"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 7,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Milica V. Carević",
      "orcid": "0000-0002-7212-4438"
    },
    {
      "affs": [
        0
      ],
      "name": "Nadica D. Abazović",
      "orcid": "0000-0003-0718-5186"
    },
    {
      "affs": [
        1
      ],
      "name": "Zorica D. Mojović",
      "orcid": "0000-0003-4804-0776"
    },
    {
      "affs": [
        1
      ],
      "name": "Jugoslav B. Krstić",
      "orcid": "0000-0003-0321-0698"
    },
    {
      "affs": [
        2
      ],
      "name": "Miloš D. Mojović",
      "orcid": "0000-0002-1868-9913"
    },
    {
      "affs": [
        0
      ],
      "name": "Tatjana D. Vulić"
    },
    {
      "affs": [
        0
      ],
      "name": "Mirjana I. Čomor",
      "orcid": "0000-0002-7222-4500"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8wbst816r801k.bib",
  "cited_by": 0,
  "doi": "10.3390/polym18212664",
  "fulltext_url": null,
  "id": "8wbst816r801k",
  "issns": [
    "2073-4360"
  ],
  "landing_url": "https://www.mdpi.com/2073-4360/18/21/2664",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2105|Advanced Photocatalysis Techniques"
    ]
  ],
  "openalex": "W7224103508",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-28",
  "publisher": "MDPI AG",
  "ris": "https://research.draconitic.com/paper/8wbst816r801k.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:44Z",
      "native_id": "10.3390/polym18212664",
      "source": "crossref",
      "url": "https://www.mdpi.com/2073-4360/18/21/2664"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "issn:2073-4360",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Urea-Derived Carbon Nitride Fragmentation: A Route to Melem-Based Superstructures",
  "title_text": "Urea-Derived Carbon Nitride Fragmentation: A Route to Melem-Based Superstructures",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:44Z",
  "url": "https://research.draconitic.com/paper/8wbst816r801k",
  "venue": "Polymers",
  "versions": []
}