Construction of Pt@BiFeO<sub>3</sub> Xerogel-Supported O-g-C<sub>3</sub>N<sub>4</sub> Heterojunction System for Enhanced Visible-Light Activity towards Photocatalytic Degradation of Rhodamine B
Synthetic organic pigments from the direct discharge of textile effluents are considered as colossal global concern and attract the attention of scholars. The efficient construction of heterojunction systems involving precious metal co-catalysis is an effective strategy for obtaining highly efficien...
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| Format: | Article |
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MDPI AG
2023-06-01
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| Online Access: | https://www.mdpi.com/2310-2861/9/6/471 |
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| author | Abubakar Usman Katsina Sonia Mihai Dănuţa Matei Diana-Luciana Cursaru Raluca Şomoghi Cristina Lavinia Nistor |
| author_facet | Abubakar Usman Katsina Sonia Mihai Dănuţa Matei Diana-Luciana Cursaru Raluca Şomoghi Cristina Lavinia Nistor |
| author_sort | Abubakar Usman Katsina |
| collection | DOAJ |
| description | Synthetic organic pigments from the direct discharge of textile effluents are considered as colossal global concern and attract the attention of scholars. The efficient construction of heterojunction systems involving precious metal co-catalysis is an effective strategy for obtaining highly efficient photocatalytic materials. Herein, we report the construction of a Pt-doped BiFeO<sub>3</sub>/O-g-C<sub>3</sub>N<sub>4</sub> (Pt@BFO/O-CN) S-scheme heterojunction system for photocatalytic degradation of aqueous rhodamine B (RhB) under visible-light irradiation. The photocatalytic performances of Pt@BFO/O-CN and BFO/O-CN composites and pristine BiFeO<sub>3</sub> and O-g-C<sub>3</sub>N<sub>4</sub> were compared, and the photocatalytic process of the Pt@BFO/O-CN system was optimized. The results exhibit that the S-scheme Pt@BFO/O-CN heterojunction has superior photocatalytic performance compared to its fellow catalysts, which is due to the asymmetric nature of the as-constructed heterojunction. The as-constructed Pt@BFO/O-CN heterojunction reveals high performance in photocatalytic degradation of RhB with a degradation efficiency of 100% achieved after 50 min of visible-light irradiation. The photodegradation fitted well with pseudo-first-order kinetics proceeding with a rate constant of 4.63 × 10<sup>−2</sup> min<sup>−1</sup>. The radical trapping test reveals that h<sup>+</sup> and <sup>•</sup>O<sub>2</sub><sup>−</sup> take the leading role in the reaction, while the stability test reveals a 98% efficiency after the fourth cycle. As established from various interpretations, the considerably enhanced photocatalytic performance of the heterojunction system can be attributed to the promoted charge carrier separation and transfer of photoexcited carriers, as well as the strong photo-redox ability established. Hence, the S-scheme Pt@BFO/O-CN heterojunction is a good candidate in the treatment of industrial wastewater for the mineralization of organic micropollutants, which pose a grievous threat to the environment. |
| first_indexed | 2024-03-11T02:26:08Z |
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| id | doaj.art-26e5a47a28ca422ba3cdebb5b45fb773 |
| institution | Directory Open Access Journal |
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| last_indexed | 2024-03-11T02:26:08Z |
| publishDate | 2023-06-01 |
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| spelling | doaj.art-26e5a47a28ca422ba3cdebb5b45fb7732023-11-18T10:32:24ZengMDPI AGGels2310-28612023-06-019647110.3390/gels9060471Construction of Pt@BiFeO<sub>3</sub> Xerogel-Supported O-g-C<sub>3</sub>N<sub>4</sub> Heterojunction System for Enhanced Visible-Light Activity towards Photocatalytic Degradation of Rhodamine BAbubakar Usman Katsina0Sonia Mihai1Dănuţa Matei2Diana-Luciana Cursaru3Raluca Şomoghi4Cristina Lavinia Nistor5Faculty of Petroleum Technology and Petrochemistry, Petroleum—Gas University of Ploiești, 100680 Ploiești, RomaniaFaculty of Petroleum Technology and Petrochemistry, Petroleum—Gas University of Ploiești, 100680 Ploiești, RomaniaFaculty of Petroleum Technology and Petrochemistry, Petroleum—Gas University of Ploiești, 100680 Ploiești, RomaniaFaculty of Petroleum Technology and Petrochemistry, Petroleum—Gas University of Ploiești, 100680 Ploiești, RomaniaFaculty of Petroleum Technology and Petrochemistry, Petroleum—Gas University of Ploiești, 100680 Ploiești, RomaniaNational Institute for Research and Development in Chemistry and Petrochemistry—ICECHIM, 060021 Bucharest, RomaniaSynthetic organic pigments from the direct discharge of textile effluents are considered as colossal global concern and attract the attention of scholars. The efficient construction of heterojunction systems involving precious metal co-catalysis is an effective strategy for obtaining highly efficient photocatalytic materials. Herein, we report the construction of a Pt-doped BiFeO<sub>3</sub>/O-g-C<sub>3</sub>N<sub>4</sub> (Pt@BFO/O-CN) S-scheme heterojunction system for photocatalytic degradation of aqueous rhodamine B (RhB) under visible-light irradiation. The photocatalytic performances of Pt@BFO/O-CN and BFO/O-CN composites and pristine BiFeO<sub>3</sub> and O-g-C<sub>3</sub>N<sub>4</sub> were compared, and the photocatalytic process of the Pt@BFO/O-CN system was optimized. The results exhibit that the S-scheme Pt@BFO/O-CN heterojunction has superior photocatalytic performance compared to its fellow catalysts, which is due to the asymmetric nature of the as-constructed heterojunction. The as-constructed Pt@BFO/O-CN heterojunction reveals high performance in photocatalytic degradation of RhB with a degradation efficiency of 100% achieved after 50 min of visible-light irradiation. The photodegradation fitted well with pseudo-first-order kinetics proceeding with a rate constant of 4.63 × 10<sup>−2</sup> min<sup>−1</sup>. The radical trapping test reveals that h<sup>+</sup> and <sup>•</sup>O<sub>2</sub><sup>−</sup> take the leading role in the reaction, while the stability test reveals a 98% efficiency after the fourth cycle. As established from various interpretations, the considerably enhanced photocatalytic performance of the heterojunction system can be attributed to the promoted charge carrier separation and transfer of photoexcited carriers, as well as the strong photo-redox ability established. Hence, the S-scheme Pt@BFO/O-CN heterojunction is a good candidate in the treatment of industrial wastewater for the mineralization of organic micropollutants, which pose a grievous threat to the environment.https://www.mdpi.com/2310-2861/9/6/471xerogelsrhodamine BS-scheme heterojunction photocatalystbismuth ferrite (BiFeO<sub>3</sub>)graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>)perovskites |
| spellingShingle | Abubakar Usman Katsina Sonia Mihai Dănuţa Matei Diana-Luciana Cursaru Raluca Şomoghi Cristina Lavinia Nistor Construction of Pt@BiFeO<sub>3</sub> Xerogel-Supported O-g-C<sub>3</sub>N<sub>4</sub> Heterojunction System for Enhanced Visible-Light Activity towards Photocatalytic Degradation of Rhodamine B Gels xerogels rhodamine B S-scheme heterojunction photocatalyst bismuth ferrite (BiFeO<sub>3</sub>) graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) perovskites |
| title | Construction of Pt@BiFeO<sub>3</sub> Xerogel-Supported O-g-C<sub>3</sub>N<sub>4</sub> Heterojunction System for Enhanced Visible-Light Activity towards Photocatalytic Degradation of Rhodamine B |
| title_full | Construction of Pt@BiFeO<sub>3</sub> Xerogel-Supported O-g-C<sub>3</sub>N<sub>4</sub> Heterojunction System for Enhanced Visible-Light Activity towards Photocatalytic Degradation of Rhodamine B |
| title_fullStr | Construction of Pt@BiFeO<sub>3</sub> Xerogel-Supported O-g-C<sub>3</sub>N<sub>4</sub> Heterojunction System for Enhanced Visible-Light Activity towards Photocatalytic Degradation of Rhodamine B |
| title_full_unstemmed | Construction of Pt@BiFeO<sub>3</sub> Xerogel-Supported O-g-C<sub>3</sub>N<sub>4</sub> Heterojunction System for Enhanced Visible-Light Activity towards Photocatalytic Degradation of Rhodamine B |
| title_short | Construction of Pt@BiFeO<sub>3</sub> Xerogel-Supported O-g-C<sub>3</sub>N<sub>4</sub> Heterojunction System for Enhanced Visible-Light Activity towards Photocatalytic Degradation of Rhodamine B |
| title_sort | construction of pt bifeo sub 3 sub xerogel supported o g c sub 3 sub n sub 4 sub heterojunction system for enhanced visible light activity towards photocatalytic degradation of rhodamine b |
| topic | xerogels rhodamine B S-scheme heterojunction photocatalyst bismuth ferrite (BiFeO<sub>3</sub>) graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) perovskites |
| url | https://www.mdpi.com/2310-2861/9/6/471 |
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