在可见光下使用BPNS-CdS复合催化剂提高BPS的高效降解
Xiaolong Rong1, Ying Han2, Hao Dai1
1School of Environmental Science and Engineering, Changzhou University, Changzhou, 213164, China.
Environmental research
|March 14, 2024
概括
黑纳米片-硫化 (BPNS-CdS) 复合材料有效地降解双S (BPS). 这种新的光催化剂在酸性条件下显示出高降解率,并揭示了关键的降解中间体.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 化学 化学 化学
背景情况:
- 双S (BPS) 越来越多地被用作双A (BPA) 的替代品.
- 比如BPA,BPS比BPA更耐降解,这给环境带来了一些挑战.
- 黑纳米板 (BPNS) 是用于光催化的有希望的二维纳米材料.
研究的目的:
- 为了合成和评估BPNS-硫化物 (CdS) 纳米复合物用于BPS降解.
- 为了研究BPNS,CdS和BPNS-CdS复合材料的光催化效率.
- 使用BPNS-CdS.阐明BPS的光催化机制和降解途径.
主要方法:
- 通过液相脱皮来制备少数层的BPNS.
- 使用水热方法合成了BPNS-CdS纳米复合材料.
- 光催化降解实验是在可见光下在各种pH条件下进行的.
- 进行了电子旋转共振 (ESR),载体分离/迁移和带隙测量.
- 使用高性能液体染色学质谱法 (HPLC-MS) 分析了降解产品.
主要成果:
- 在性环境中,BPNS-CdS复合物表现出最高的BPS降解率 (86.9%).
- 与中性条件相比,在酸性条件下降解效率更高.
- 在可见光下,ESR证实了BPNS-CdS在可见光下生成O2−,OH和h+.
- 关键的BPS降解中间体被确定为4-Phenolsulfonic酸,乙烯原酸和异酸.
结论:
- BPNS-CdS纳米复合材料是BPS降解的高效光催化剂.
- 该研究提供了关于BPNS和CdS在光催化中的协同效应的见解.
- 提出了一种可能的BPS降解途径,涉及活性氧物种和基离子.
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