Oxygen vacancies mediated Bi12O17Cl2 ultrathin nanobelts: Boosting molecular oxygen activation for efficient organic pollutants degradation
| Autor: | Shi-Xin Sun, Bin Wang, Gaopeng Liu, Xinyuan Xu, Jiexiang Xia, Xin Chen, Huaming Li |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
chemistry.chemical_classification
Pollutant Reactive oxygen species Materials science business.industry chemistry.chemical_element Photochemistry Oxygen Surfaces Coatings and Films Electronic Optical and Magnetic Materials Biomaterials Colloid and Surface Chemistry Semiconductor chemistry Photocatalysis Degradation (geology) Molecule Molecular oxygen business |
| Zdroj: | Journal of Colloid and Interface Science. 609:23-32 |
| ISSN: | 0021-9797 |
| Popis: | Photocatalysis technology has been considered as a sustainable and promising strategy for pollutant degradation. However, the photocatalytic activity is limited by the unsatisfactory carrier separation efficiency of photocatalysts and insufficient reactive oxygen species. Herein, the oxygen vacancies (OVs) mediated Bi12O17Cl2 ultra-thin nanobelts (ROV Bi12O17Cl2) were fabricated via solvothermal method. The surface oxygen vacancies can act as the ‘electron sink’ and boost charge separation. Thus, the ROV Bi12O17Cl2 shows superior photocatalytic performance, which is 2.72 and 4.52 times compared to deficient oxygen vacancies Bi12O17Cl2 (DOV Bi12O17Cl2) and Bulk Bi12O17Cl2 for colored organic pollutants degradation, respectively. Besides, the ROV Bi12O17Cl2 also displays excellent removal efficiency for refractory antibiotics, roughly 4.00 and 7.45 times compared to that of DOV Bi12O17Cl2 and Bulk Bi12O17Cl2, respectively. Furthermore, the intermediates for photocatalytic degradation were determined through HPLC-MS and the possible degradation paths of the target molecules were inferred. Capture experiment and ESR spectra confirmed that the •O2− played a vital role for the organic pollutant degradation. This work provides a new perspective for the design of advanced semiconductors for organic pollutants degradation. |
| Databáze: | OpenAIRE |
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