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Preprint
Self-sensitized photodegradation and adsorption of aqueous malachite green dye using one-dimensional titanium oxide nanofilaments
iScience, v 27(9), 110647
20 Sep 2024
PMID: 39262812
Abstract
Truly one-dimensional titanium oxide nanofilaments with a lepidocrocite structure (1DLs) were explored in the adsorption and photocatalytic degradation of aqueous malachite green (MG), a toxic polluting dye. Decolorization is monitored by ultraviolet-visible spectroscopy, and mineralization is confirmed by total organic carbon analysis. The 1DL/MG flocs are characterized by scanning electron microscopy and X-ray diffraction. 1DLs, a colloidal nanomaterial, exhibit flocculating behavior while demonstrating high affinity for MG, with a maximum uptake of >680 mg/g rapidly via ion exchange. Additionally, 1DLs decolorize MG under visible light only, unlike most available titania products, via a self-sensitization effect. MG is decolorized by 1DLs by >70% in 30 min under 1 sun exposure of visible light. Counterintuitively, dye adsorption increases as the normalized concentration by mass of 1DL decreases. Demonstrating high adsorption capacity and dye mineralization supports the use of 1DLs in water treatment and self-sensitization for photoelectrochemical devices, like solar cells.
• One-dimensional titanium oxide material with 5 × 7 Å2 cross section
• Rapid, high adsorption capacity of malachite green primarily due to ion exchange
• Decolorization of dye occurs under visible light irradiation only, unlike other nano TiO2
• Photocatalytic activity causes mineralization of dye
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6 citations in Scopus
Details
- Title
- Self-sensitized photodegradation and adsorption of aqueous malachite green dye using one-dimensional titanium oxide nanofilaments
- Creators
- Adam D. Walter - Drexel University, Materials Science and EngineeringHiba Benamor - Laboratoire d’Etudes et Recherche en Technologie Industrielle, Université of Saad Dahlab Blida 1, Blida, AlgeriaLucas M. Ferrer - Drexel UniversityTreesa Reji - Drexel University, Materials Science and EngineeringTracey Curran - Drexel University, Environmental BiogeochemistryGregory R. Schwenk - Drexel University, Materials Science and EngineeringMohamed Hadji - Laboratoire d’Etudes et Recherche en Technologie Industrielle, Université of Saad Dahlab Blida 1, Blida, AlgeriaMegan A. Creighton - Drexel University, Chemical and Biological EngineeringMichel W. Barsoum - Drexel University, Materials Science and Engineering
- Publication Details
- iScience, v 27(9), 110647
- Publisher
- Elsevier
- Resource Type
- Preprint
- Language
- English
- Academic Unit
- Environmental Biogeochemistry; Materials Science and Engineering; Chemical and Biological Engineering
- Web of Science ID
- WOS:001302201000001
- Scopus ID
- 2-s2.0-85207346278
- Other Identifier
- 991021895743204721
InCites Highlights
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- Collaboration types
- International collaboration
- Web of Science research areas
- Chemistry, Physical