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| CNs−Bi12O17Cl2复合体系制备及光催化降解性能研究 |
| Preparation of CNs-Bi12O17Cl2 binary composites and their photocatalytic degradation performance |
| 投稿时间：2021-11-03 |
| DOI：10.13259/j.cnki.eri.2022.02.001 |
| 中文关键词: Bi12O17Cl2 CNs 光催化 亚甲基蓝 机理 |
| 英文关键词:Bi12O17Cl2 CNs photocatalytic methylene blue mechanism |
| 基金项目:国家自然科学基金项目（21207089）；上海市自然科学基金项目（17ZR1419200） |
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| 中文摘要: |
| 采用简易水解法制备了一系列CNs−Bi12O17Cl2复合半导体材料并对其物相、光学性质和光催化降解性能进行了分析表征。X射线衍射光谱表明复合体系衍射峰与四方晶相Bi12O17Cl2一致，紫外可见漫反射光谱证明复合材料在可见区域具有较强的光吸收能力，由此可提高光催化活性。在可见光照射下，复合体系相对于纯Bi12O17Cl2对亚甲基蓝具有更高的降解效率，特别是具有合适组分的样品CB50可以在180 min后完全去除20 mg·L−1的亚甲基蓝分子，这主要是由于CNs的引入抑制了光生载流子的复合，使复合体系表现出更高的光催化降解性能。最后，提出了可能的光催化机理。 |
| 英文摘要: |
| In this study, a series of binary composites CNs-Bi12O17Cl2 were prepared through a facile hydrolysis method and their phase composition, optical property and photocatalytic degradation performance were further characterized. Their XRD patterns were consistent with those of tetragonal Bi12O17Cl2 phase. In addition, these composites showed relatively enhanced visible-light absorption capacity. It could reinforce the photocatalytic degradation performance over methylene blue (MB). Especially, the candidate CB50 with suitable composition was able to completely remove 20 mg·L−1 MB under visible light after 180 min, which was associated with efficient transfer of charge carriers across interfaces after the incorporation of CNs. Finally, possible photocatalytic mechanism was proposed. |
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