Traditional photocatalysts like TiO₂ often suffer from a wide bandgap, limiting their efficiency to the ultraviolet spectrum. Heterojunction engineering—coupling two semiconductors with staggered band alignments—is a proven strategy to extend light response into the visible range. This paper focuses on the system. ZnO provides a robust, non-toxic framework, while BiOI, a p-type semiconductor with a narrow bandgap, serves as a visible-light sensitizer. 2. Materials and Methods
The study successfully demonstrates a facile route to highly active ZnO–BiOI photocatalysts. The material’s high degradation efficiency and excellent recovery/reusability make it a promising candidate for practical industrial wastewater treatment. 124272
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: The "cotton floc" morphology was confirmed using Scanning Electron Microscopy (SEM). Structural integrity and crystalline phases were verified via X-ray Diffraction (XRD). ZnO provides a robust, non-toxic framework, while BiOI,
The number most likely refers to the scientific article "One-step synthesis of highly active cotton floc like ZnO–BiOI: Visible-light photocatalytic performance, recovery and degradation mechanism," published in the Journal of Solid State Chemistry , Volume 327 (2023).
: A rapid one-step hydrothermal or solvothermal method was employed to produce the ZnO–BiOI composite.
: The ZnO–BiOI heterostructure exhibited a significant redshift in light absorption compared to pure ZnO, confirming its efficacy under visible light.