Photocatalytic Degradation of Brilliant Green Dye using B-TiO2 under Visible Light Irradiation
The presence of dyes in aquatic environments is a subject of concern owing to their significant toxicity and potential for bioaccumulation. Consequently, it is imperative to eliminate these dyes from wastewater treatment effluents prior to environmental discharge. This requirement aligns with Sustai...
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AIDIC Servizi S.r.l.
2025-07-01
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| Series: | Chemical Engineering Transactions |
| Online Access: | https://www.cetjournal.it/index.php/cet/article/view/15311 |
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| author | Phephile Ngwenya Fisseha A. Bezza Shepherd M. Tichapondwa Evans M. N. Chirwa |
| author_facet | Phephile Ngwenya Fisseha A. Bezza Shepherd M. Tichapondwa Evans M. N. Chirwa |
| author_sort | Phephile Ngwenya |
| collection | DOAJ |
| description | The presence of dyes in aquatic environments is a subject of concern owing to their significant toxicity and potential for bioaccumulation. Consequently, it is imperative to eliminate these dyes from wastewater treatment effluents prior to environmental discharge. This requirement aligns with Sustainable Development Goal (SDG) 6, targets 6.1, 6.3, and 6.6, as well as SDG 3, target 3.9, To date, variant advanced oxidation remediation techniques have been explored, with TiO2 photocatalysis emerging as an efficient and sustainable option due to its strong oxidative capabilities. However, the dependence of the process on ultraviolet (UV) light irradiation constrains application due to the related energy demands. Overcoming all the inadequacies of pristine TiO2, hydrogenated black TiO2 (B-TiO2) has a narrower bandgap of approximately 1.5 eV, augmented light absorption efficiency in the visible and infrared spectra, and consequently enhanced photocatalytic performance. Thus, the motivation of the present study was to successfully synthesize B-TiO2 nanoparticles by the chemical reduction of TiO2 using NaBH4 during calcination. The success of the synthesis process was confirmed by X-ray diffraction patterns which showed crystal planes of the anatase and rutile TiO2 phases in the synthesized nanoparticles, while scanning electron microscopy (SEM) imagery established the morphology to be near spherical. Energy-dispersive X-ray spectronomy (EDS) showed a variation in the Ti to oxygen ration indicating successful B-TiO2 formation. The synthesized semiconductor photocatalyst had degradation efficiencies as high as 99% within a 30-minute visible light exposure at a pH of 5.8 and a catalyst loading of 0.1 g/L. Surmounting the performance of other TiO2-based photocatalysts used for the photocatalytic degradation of BG under similar conditions. Therefore, substantiating the practicality of the catalyst for dye degradation under visible light irradiation. |
| format | Article |
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| institution | Kabale University |
| issn | 2283-9216 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | AIDIC Servizi S.r.l. |
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| series | Chemical Engineering Transactions |
| spelling | doaj-art-fb927f2cb86a497fab197b955bd5f4fb2025-08-20T03:34:47ZengAIDIC Servizi S.r.l.Chemical Engineering Transactions2283-92162025-07-01117Photocatalytic Degradation of Brilliant Green Dye using B-TiO2 under Visible Light IrradiationPhephile NgwenyaFisseha A. BezzaShepherd M. TichapondwaEvans M. N. ChirwaThe presence of dyes in aquatic environments is a subject of concern owing to their significant toxicity and potential for bioaccumulation. Consequently, it is imperative to eliminate these dyes from wastewater treatment effluents prior to environmental discharge. This requirement aligns with Sustainable Development Goal (SDG) 6, targets 6.1, 6.3, and 6.6, as well as SDG 3, target 3.9, To date, variant advanced oxidation remediation techniques have been explored, with TiO2 photocatalysis emerging as an efficient and sustainable option due to its strong oxidative capabilities. However, the dependence of the process on ultraviolet (UV) light irradiation constrains application due to the related energy demands. Overcoming all the inadequacies of pristine TiO2, hydrogenated black TiO2 (B-TiO2) has a narrower bandgap of approximately 1.5 eV, augmented light absorption efficiency in the visible and infrared spectra, and consequently enhanced photocatalytic performance. Thus, the motivation of the present study was to successfully synthesize B-TiO2 nanoparticles by the chemical reduction of TiO2 using NaBH4 during calcination. The success of the synthesis process was confirmed by X-ray diffraction patterns which showed crystal planes of the anatase and rutile TiO2 phases in the synthesized nanoparticles, while scanning electron microscopy (SEM) imagery established the morphology to be near spherical. Energy-dispersive X-ray spectronomy (EDS) showed a variation in the Ti to oxygen ration indicating successful B-TiO2 formation. The synthesized semiconductor photocatalyst had degradation efficiencies as high as 99% within a 30-minute visible light exposure at a pH of 5.8 and a catalyst loading of 0.1 g/L. Surmounting the performance of other TiO2-based photocatalysts used for the photocatalytic degradation of BG under similar conditions. Therefore, substantiating the practicality of the catalyst for dye degradation under visible light irradiation.https://www.cetjournal.it/index.php/cet/article/view/15311 |
| spellingShingle | Phephile Ngwenya Fisseha A. Bezza Shepherd M. Tichapondwa Evans M. N. Chirwa Photocatalytic Degradation of Brilliant Green Dye using B-TiO2 under Visible Light Irradiation Chemical Engineering Transactions |
| title | Photocatalytic Degradation of Brilliant Green Dye using B-TiO2 under Visible Light Irradiation |
| title_full | Photocatalytic Degradation of Brilliant Green Dye using B-TiO2 under Visible Light Irradiation |
| title_fullStr | Photocatalytic Degradation of Brilliant Green Dye using B-TiO2 under Visible Light Irradiation |
| title_full_unstemmed | Photocatalytic Degradation of Brilliant Green Dye using B-TiO2 under Visible Light Irradiation |
| title_short | Photocatalytic Degradation of Brilliant Green Dye using B-TiO2 under Visible Light Irradiation |
| title_sort | photocatalytic degradation of brilliant green dye using b tio2 under visible light irradiation |
| url | https://www.cetjournal.it/index.php/cet/article/view/15311 |
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