1. Interlayered double-doped N,P-MXene/ZnIn2S4 Schottky junction composite photocatalyst: Efficient removal of ciprofloxacin and methyl orange from complex wastewater.
- Author
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Chen, Yan, Yu, Zongxue, Yang, Guangcheng, Tan, Qiuyue, He, Niandan, Guo, Shijie, Xia, Shuangshuang, and Chen, Zhiquan
- Subjects
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SOLUTION (Chemistry) , *CHEMICAL structure , *CHEMICAL stability , *SCHOTTKY barrier , *CATALYST supports - Abstract
In this study, N and P were used to double doping MXene to obtain N,P-MXene with increased layer spacing and structural defects. Schottky junction N,P-MXene/ZnIn 2 S 4 photocatalysts with tight interfacial contacts were obtained by in situ growth of flower-like ZnIn 2 S 4 nanosheets. The N,P-MXene interlayer spatial structure facilitates the uniform dispersion of ZnIn 2 S 4 and the exposure of the active site. The formation of the Schottky barrier enables the two closely contacted interfaces to form a carrier transport channel, which accelerates the arrival of the charge carriers on the catalyst surface for REDOX reactions. 50 N,P-MXene/ZIS degraded 86.1 % of CIP and 93.9 % of MO. In addition, after several cycling experiments, it was proved that the photocatalyst had good structure and chemical stability. The photocatalytic mechanism was demonstrated by UPS and radical quenching experiments. N,P-MXene/ZnIn 2 S 4 is not only suitable for pH = 7–11, but also for salt solution wastewater containing higher concentrations of NaCl or KCl. Therefore, the construction of heteroatom doped N,P-MXene/ZnIn 2 S 4 Schottky junction photocatalysts with excellent photocatalytic degradation performance is of profound significance for the treatment of pollutants. [Display omitted] • N and P elements double doping MXene to obtain N,P-MXene with increased layer spacing and defective structure. • N,P-MXene/ZIS Schottky barrier composite photocatalyst degraded CIP (86.1 %) and MO (93.9 %) with high efficiency. • Schottky barrier promotes the formation of charge carrier transport channels, which is beneficial to the separation of photogenerated electron and hole pairs. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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