{
  "abstract": "Green-synthesized SnO2 nanoparticles using Brassica oleracea leaf extract (BO-SnO2 NPs) were prepared and evaluated for photocatalytic dye degradation and heavy metal adsorption. The biosynthesized BO-SnO2 NPs were characterized by UV-Vis, FTIR (Sn-O-Sn at 583 cm-1), XRD, FESEM, and EDX analyses. XRD analysis revealed a tetragonal rutile crystalline structure with an average crystallite size of 5.32 nm. FESEM showed spherical particles with a mean size of ∼22.65 nm, indicating that the observed particles are agglomerates of several individual crystallites. In photocatalytic experiments, BO-SnO2 NPs achieved a maximum degradation of 95.00% for Malachite Green dye under UV irradiation within 120 min. Batch adsorption studies for Pb(II) and Cr(VI) showed maximum removal of 65.0% at pH 6.0 and 61.5% at pH 2.0 within 60 min, respectively. The equilibrium adsorption capacity increased from 2.60 to 15.60 mg/g for Pb(II) and from 2.46 to 14.70 mg/g for Cr(VI) as the initial concentration increased from 2 to 16 mg/L. The equilibrium data fitted well to both Langmuir and Freundlich isotherm models with R2 ≥ 0.99, with maximum adsorption capacities of 29.41 mg/g for Pb(II) and 28.65 mg/g for Cr(VI) (Langmuir). The RL values ranging from 0.317 to 0.804 and 1/n values of 0.723 and 0.740 confirmed favorable adsorption. The results suggest that BO-SnO2 NPs are a promising eco-friendly material for wastewater treatment.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Chemistry",
    "University of Chittagong"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 4,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "M. Bakhtiar Habib Nahin"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "M Kamrul Hossain"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "M Ashiqur R Khan"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Faisal Islam Chowdhury"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/ba8mb5b1tnmdn.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15009324/v1",
  "fulltext_url": null,
  "id": "ba8mb5b1tnmdn",
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  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009324/v1",
  "language": null,
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2505|Nanoparticles: synthesis and applications"
    ]
  ],
  "openalex": "W7214121185",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15009324/v1",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-22",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/ba8mb5b1tnmdn.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:21Z",
      "native_id": "10.26434/chemrxiv.15009324",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15009324/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2505|Nanoparticles: synthesis and applications",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Green synthesis of SnO2 nanoparticles using Brassica oleracea leaf extract for dual-functional photocatalytic degradation of Malachite Green and adsorptive removal of Pb(II) and Cr(VI)",
  "title_text": "Green synthesis of SnO2 nanoparticles using Brassica oleracea leaf extract for dual-functional photocatalytic degradation of Malachite Green and adsorptive removal of Pb(II) and Cr(VI)",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:21Z",
  "url": "https://research.draconitic.com/paper/ba8mb5b1tnmdn",
  "venue": "ChemRxiv",
  "versions": []
}