Mechanistic insights into the simultaneous visible-light induced photodegradation of organic pollutants by g-C3N4/titanate heterojunction
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2023
Authors
Milošević, Ksenija
Lončarević, Davor

Mudrinić, Tihana

Kalagasidis Krušić, Melina

Dostanić, Jasmina

Article (Published version)

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The visible-light-active heterojunctions based on TiO2 were extensively investigated due to their wide range of energy and environment applications. In this study, g-C3N4/titanate heterojunction photocatalyst was successfully prepared by a simple one-step calcination route from melamine and hydrothermally prepared titanates. The photocatalyst was characterized by different physicochemical methods, e.g., X-ray diffraction (XRD), scanning electron microscopy (SEM), and N2 physisorption analysis. The photocatalytic efficiency of synthesized photocatalyst was evaluated by single and simultaneous degradation of methylene blue (MB) and orange G (OG) dyes under solar and visible light irradiation. The photocatalyst exhibited improved visible light activity due to the efficient separation of photogenerated charge carriers and enhanced visible light absorption. The degradation of MB was examined under different reaction conditions to assess the influence of initial MB concentration, catalyst lo...ading, and pH on the degradation kinetics. Dye degradation study in the single and binary dye systems revealed that adsorption was limiting step that governs the pollutant degradation order. Radical trapping experiments were performed using different types of scavengers to highlight the difference in photochemical reactions and mechanism of MB and OG dye degradation under different light irradiation. Comparison of the reaction pathways under visible and solar light irradiation supported with determined bandgap edges and photoluminescence (PL) analysis suggested that the g-C3N4/titanate heterojunction belonged to the type II heterojunction. Graphical Abstract: [Figure not available: see fulltext.].
Keywords:
Dye pollutant / Environmental effects / g-C3N4 / Heterojunction / Photocatalysis / Simultaneous degradation / TiO2Source:
Journal of Nanoparticle Research, 2023, 25, 2, 26-Publisher:
- Springer Science and Business Media B.V.
Funding / projects:
- Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 200026 (University of Belgrade, Institute of Chemistry, Technology and Metallurgy - IChTM) (RS-200026)
- Razvoj sistema za grejanje i hlađenje plastenika/ staklenika sa geotermalnom energijom (RS-18234)
DOI: 10.1007/s11051-023-05673-x
ISSN: 1388-0764; 1572-896X
WoS: 000922338000001
Scopus: 2-s2.0-85146793296
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IHTMTY - JOUR AU - Milošević, Ksenija AU - Lončarević, Davor AU - Mudrinić, Tihana AU - Kalagasidis Krušić, Melina AU - Dostanić, Jasmina PY - 2023 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/5794 AB - The visible-light-active heterojunctions based on TiO2 were extensively investigated due to their wide range of energy and environment applications. In this study, g-C3N4/titanate heterojunction photocatalyst was successfully prepared by a simple one-step calcination route from melamine and hydrothermally prepared titanates. The photocatalyst was characterized by different physicochemical methods, e.g., X-ray diffraction (XRD), scanning electron microscopy (SEM), and N2 physisorption analysis. The photocatalytic efficiency of synthesized photocatalyst was evaluated by single and simultaneous degradation of methylene blue (MB) and orange G (OG) dyes under solar and visible light irradiation. The photocatalyst exhibited improved visible light activity due to the efficient separation of photogenerated charge carriers and enhanced visible light absorption. The degradation of MB was examined under different reaction conditions to assess the influence of initial MB concentration, catalyst loading, and pH on the degradation kinetics. Dye degradation study in the single and binary dye systems revealed that adsorption was limiting step that governs the pollutant degradation order. Radical trapping experiments were performed using different types of scavengers to highlight the difference in photochemical reactions and mechanism of MB and OG dye degradation under different light irradiation. Comparison of the reaction pathways under visible and solar light irradiation supported with determined bandgap edges and photoluminescence (PL) analysis suggested that the g-C3N4/titanate heterojunction belonged to the type II heterojunction. Graphical Abstract: [Figure not available: see fulltext.]. PB - Springer Science and Business Media B.V. T2 - Journal of Nanoparticle Research T1 - Mechanistic insights into the simultaneous visible-light induced photodegradation of organic pollutants by g-C3N4/titanate heterojunction VL - 25 IS - 2 SP - 26 DO - 10.1007/s11051-023-05673-x ER -
@article{ author = "Milošević, Ksenija and Lončarević, Davor and Mudrinić, Tihana and Kalagasidis Krušić, Melina and Dostanić, Jasmina", year = "2023", abstract = "The visible-light-active heterojunctions based on TiO2 were extensively investigated due to their wide range of energy and environment applications. In this study, g-C3N4/titanate heterojunction photocatalyst was successfully prepared by a simple one-step calcination route from melamine and hydrothermally prepared titanates. The photocatalyst was characterized by different physicochemical methods, e.g., X-ray diffraction (XRD), scanning electron microscopy (SEM), and N2 physisorption analysis. The photocatalytic efficiency of synthesized photocatalyst was evaluated by single and simultaneous degradation of methylene blue (MB) and orange G (OG) dyes under solar and visible light irradiation. The photocatalyst exhibited improved visible light activity due to the efficient separation of photogenerated charge carriers and enhanced visible light absorption. The degradation of MB was examined under different reaction conditions to assess the influence of initial MB concentration, catalyst loading, and pH on the degradation kinetics. Dye degradation study in the single and binary dye systems revealed that adsorption was limiting step that governs the pollutant degradation order. Radical trapping experiments were performed using different types of scavengers to highlight the difference in photochemical reactions and mechanism of MB and OG dye degradation under different light irradiation. Comparison of the reaction pathways under visible and solar light irradiation supported with determined bandgap edges and photoluminescence (PL) analysis suggested that the g-C3N4/titanate heterojunction belonged to the type II heterojunction. Graphical Abstract: [Figure not available: see fulltext.].", publisher = "Springer Science and Business Media B.V.", journal = "Journal of Nanoparticle Research", title = "Mechanistic insights into the simultaneous visible-light induced photodegradation of organic pollutants by g-C3N4/titanate heterojunction", volume = "25", number = "2", pages = "26", doi = "10.1007/s11051-023-05673-x" }
Milošević, K., Lončarević, D., Mudrinić, T., Kalagasidis Krušić, M.,& Dostanić, J.. (2023). Mechanistic insights into the simultaneous visible-light induced photodegradation of organic pollutants by g-C3N4/titanate heterojunction. in Journal of Nanoparticle Research Springer Science and Business Media B.V.., 25(2), 26. https://doi.org/10.1007/s11051-023-05673-x
Milošević K, Lončarević D, Mudrinić T, Kalagasidis Krušić M, Dostanić J. Mechanistic insights into the simultaneous visible-light induced photodegradation of organic pollutants by g-C3N4/titanate heterojunction. in Journal of Nanoparticle Research. 2023;25(2):26. doi:10.1007/s11051-023-05673-x .
Milošević, Ksenija, Lončarević, Davor, Mudrinić, Tihana, Kalagasidis Krušić, Melina, Dostanić, Jasmina, "Mechanistic insights into the simultaneous visible-light induced photodegradation of organic pollutants by g-C3N4/titanate heterojunction" in Journal of Nanoparticle Research, 25, no. 2 (2023):26, https://doi.org/10.1007/s11051-023-05673-x . .