College of Chemistry and Materials Science, Hunan Agricultural University, Hunan, 410128, PR China.
School of Physics and Electronic Science, Hunan University, Hunan, 410082, PR China.
Environ Res. 2022 Mar;204(Pt A):111949. doi: 10.1016/j.envres.2021.111949. Epub 2021 Aug 31.
Photocatalysis is regarded as one of the most effective strategies for the removal of the toxic organic pollutants from aqueous solutions. However, a lack of the efficient photocatalysts prevents the widespread practical application. Herein, the electrostatic self-assembly method has been designed for facile synthesis of a novel BaSnO/PDDA/MXene (BSO/P/MX) nanocomposite as high efficient photocatalyst. In this nanocomposite, the BaSnO (BSO), poly (dimethyl-diallylammonium chloride) (PDDA) and MXene (TiCT) act as the active species, structure stabilizer and efficient electron transfer medium, respectively. Due to the strong synergy of the nanocomposite, the electron-transferring ability as well as the charge separation efficiency is boosted and thus high catalytic activity achieves towards the photodegradation of 4-nitrophenol. The superior degradation rate of 98.8% and a rate constant K of 0.09113 min have been realized within 75 min of ultraviolet (UV) light irradiation over the BSO/P/MX-8% catalyst. This as-prepared nanocomposite with the excellent catalytic activity can be employed as a promising photocatalyst for treating the organic pollutants from aqueous solutions.
光催化被认为是去除水溶液中有毒有机污染物最有效的策略之一。然而，缺乏高效的光催化剂阻碍了其广泛的实际应用。在此，设计了静电自组装方法来简便合成新型 BaSnO/PDDA/MXene（BSO/P/MX）纳米复合材料作为高效光催化剂。在该纳米复合材料中，BaSnO（BSO）、聚二甲基二烯丙基氯化铵（PDDA）和 MXene（TiCT）分别作为活性物质、结构稳定剂和高效电子转移介质。由于纳米复合材料的强协同作用，电子转移能力和电荷分离效率得到提高，从而实现了对 4-硝基苯酚的光催化降解的高催化活性。在紫外（UV）光照射 75 分钟内，BSO/P/MX-8%催化剂实现了 98.8%的超高降解率和 0.09113 min 的速率常数 K。这种具有优异催化活性的制备的纳米复合材料可用作处理水溶液中有机污染物的有前途的光催化剂。
