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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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-07-01
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| Series: | Inorganics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2304-6740/13/7/227 |
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| Summary: | 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. |
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| ISSN: | 2304-6740 |