Three-Dimensional Bi-Enriched Bi<sub>2</sub>O<sub>3</sub>/Bi<sub>2</sub>MoO<sub>6</sub> Z-Scheme Heterojunction: Augmented Photocatalytic Phenol Degradation
A three-dimensional Bi-enriched Bi<sub>2</sub>O<sub>3</sub>/Bi<sub>2</sub>MoO<sub>6</sub> Z-scheme heterojunction photocatalyst was successfully synthesized via a facile one-step hydrothermal method for efficient phenol degradation under visible light....
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MDPI AG
2025-07-01
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| Series: | Inorganics |
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| Online Access: | https://www.mdpi.com/2304-6740/13/7/227 |
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| author | Congyu Cai Shuwen Wang Pingping Wan Haoying Cai Minhui Pan Weiwei Wang |
| author_facet | Congyu Cai Shuwen Wang Pingping Wan Haoying Cai Minhui Pan Weiwei Wang |
| author_sort | Congyu Cai |
| collection | DOAJ |
| description | A three-dimensional Bi-enriched Bi<sub>2</sub>O<sub>3</sub>/Bi<sub>2</sub>MoO<sub>6</sub> Z-scheme heterojunction photocatalyst was successfully synthesized via a facile one-step hydrothermal method for efficient phenol degradation under visible light. Structural and morphological characterizations (SEM, TEM, and XRD) confirmed the formation of a nanoflower-like architecture with a high specific surface area of 81.27 m<sup>2</sup>/g. Optical and electrochemical analyses revealed efficient charge separation and extended visible-light response. Under visible-light irradiation (λ > 420 nm), this heterojunction (Bi<sub>2</sub>O<sub>3</sub>:Bi<sub>2</sub>MoO<sub>6</sub> = 3:7) demonstrated exceptional performance, degrading 97.06% of phenol (30 mg/L) within 60 min. XPS analysis confirmed the Z-scheme charge transfer mechanism: Photogenerated electrons in the conduction band of Bi<sub>2</sub>O<sub>3</sub> (−0.59 eV) facilitated the generation of ·O<sub>2</sub><sup>−</sup> radicals, while holes in the valence band of Bi<sub>2</sub>MoO<sub>6</sub> (2.44 eV) predominantly produced ·OH radicals. This synergistic effect resulted in highly efficient mineralization and degradation of phenol. |
| format | Article |
| id | doaj-art-55fb2fa772ce4c3a96e61a80975d85dd |
| institution | DOAJ |
| issn | 2304-6740 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
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| series | Inorganics |
| spelling | doaj-art-55fb2fa772ce4c3a96e61a80975d85dd2025-08-20T02:45:56ZengMDPI AGInorganics2304-67402025-07-0113722710.3390/inorganics13070227Three-Dimensional Bi-Enriched Bi<sub>2</sub>O<sub>3</sub>/Bi<sub>2</sub>MoO<sub>6</sub> Z-Scheme Heterojunction: Augmented Photocatalytic Phenol DegradationCongyu Cai0Shuwen Wang1Pingping Wan2Haoying Cai3Minhui Pan4Weiwei Wang5College of Life Science and Chemistry, Minnan Science and Technology College, Quanzhou 362332, ChinaCollege of Life Science and Chemistry, Minnan Science and Technology College, Quanzhou 362332, ChinaCollege of Life Science and Chemistry, Minnan Science and Technology College, Quanzhou 362332, ChinaCollege of Life Science and Chemistry, Minnan Science and Technology College, Quanzhou 362332, ChinaCollege of Life Science and Chemistry, Minnan Science and Technology College, Quanzhou 362332, ChinaCollege of Life Science and Chemistry, Minnan Science and Technology College, Quanzhou 362332, ChinaA three-dimensional Bi-enriched Bi<sub>2</sub>O<sub>3</sub>/Bi<sub>2</sub>MoO<sub>6</sub> Z-scheme heterojunction photocatalyst was successfully synthesized via a facile one-step hydrothermal method for efficient phenol degradation under visible light. Structural and morphological characterizations (SEM, TEM, and XRD) confirmed the formation of a nanoflower-like architecture with a high specific surface area of 81.27 m<sup>2</sup>/g. Optical and electrochemical analyses revealed efficient charge separation and extended visible-light response. Under visible-light irradiation (λ > 420 nm), this heterojunction (Bi<sub>2</sub>O<sub>3</sub>:Bi<sub>2</sub>MoO<sub>6</sub> = 3:7) demonstrated exceptional performance, degrading 97.06% of phenol (30 mg/L) within 60 min. XPS analysis confirmed the Z-scheme charge transfer mechanism: Photogenerated electrons in the conduction band of Bi<sub>2</sub>O<sub>3</sub> (−0.59 eV) facilitated the generation of ·O<sub>2</sub><sup>−</sup> radicals, while holes in the valence band of Bi<sub>2</sub>MoO<sub>6</sub> (2.44 eV) predominantly produced ·OH radicals. This synergistic effect resulted in highly efficient mineralization and degradation of phenol.https://www.mdpi.com/2304-6740/13/7/227Bi<sub>2</sub>O<sub>3</sub>photocatalytic degradationphenolZ-scheme |
| spellingShingle | Congyu Cai Shuwen Wang Pingping Wan Haoying Cai Minhui Pan Weiwei Wang Three-Dimensional Bi-Enriched Bi<sub>2</sub>O<sub>3</sub>/Bi<sub>2</sub>MoO<sub>6</sub> Z-Scheme Heterojunction: Augmented Photocatalytic Phenol Degradation Inorganics Bi<sub>2</sub>O<sub>3</sub> photocatalytic degradation phenol Z-scheme |
| title | Three-Dimensional Bi-Enriched Bi<sub>2</sub>O<sub>3</sub>/Bi<sub>2</sub>MoO<sub>6</sub> Z-Scheme Heterojunction: Augmented Photocatalytic Phenol Degradation |
| title_full | Three-Dimensional Bi-Enriched Bi<sub>2</sub>O<sub>3</sub>/Bi<sub>2</sub>MoO<sub>6</sub> Z-Scheme Heterojunction: Augmented Photocatalytic Phenol Degradation |
| title_fullStr | Three-Dimensional Bi-Enriched Bi<sub>2</sub>O<sub>3</sub>/Bi<sub>2</sub>MoO<sub>6</sub> Z-Scheme Heterojunction: Augmented Photocatalytic Phenol Degradation |
| title_full_unstemmed | Three-Dimensional Bi-Enriched Bi<sub>2</sub>O<sub>3</sub>/Bi<sub>2</sub>MoO<sub>6</sub> Z-Scheme Heterojunction: Augmented Photocatalytic Phenol Degradation |
| title_short | Three-Dimensional Bi-Enriched Bi<sub>2</sub>O<sub>3</sub>/Bi<sub>2</sub>MoO<sub>6</sub> Z-Scheme Heterojunction: Augmented Photocatalytic Phenol Degradation |
| title_sort | three dimensional bi enriched bi sub 2 sub o sub 3 sub bi sub 2 sub moo sub 6 sub z scheme heterojunction augmented photocatalytic phenol degradation |
| topic | Bi<sub>2</sub>O<sub>3</sub> photocatalytic degradation phenol Z-scheme |
| url | https://www.mdpi.com/2304-6740/13/7/227 |
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