Facet engineering of BiVO4 photocatalyst for the synergetic adsorption and activation of persulfate for organic pollutants degradation

作者：Zheng, Ling-Ling; Tian, Lei; Wang, Dengke; Chen, Ying; Tang, Qian-Qian; Xing, Qiu-Ju; Liu, Xiao-Zhen^*; Liu, Dai-Zhen; Zou, Jian-Ping^*

来源：Chemical Engineering Journal, 2023, 473: 145507.

DOI：10.1016/j.cej.2023.145507

• Advanced oxidation processes
• Bismuth vanadate
• Degradation
• Facet engineering
• Photocatalysis

Highly efficient and synergetic adsorption and activation of persulfate are the main challenges of the persulfatebased advanced oxidation processes. Herein, we synthesized a series of BiVO4-X with tunable ratios of (010)/ (1 1 0) co-exposing facet to remove the sulfamethoxazole (SMX) via the regulation of adsorption and activation of peroxydisulfate (PDS). Under visible light, the BiVO4-2 with the (01 0)/(1 1 0) co-exposing facet ratios of 1.5 can efficiently remove 95.71% SMX in 120 min. Based on the PDS adsorption concentration-texture coefficient model (C-TC), Density functional theory (DFT) calculation and relevant experiments, we confirm the top (010) facet of BiVO4-X can act as the reactive plane to adsorb the PDS via a hanging method. And the photo/electrochemical tests show the facet-dependent internal charge transfer from the (110) to the activated (010) facet in the BiVO4X. Finally, we propose the synergistic mechanism of adsorption and activation of PDS via the BiVO4-X for organic pollutants degradation. This work develops a new method to precisely regulate the co-exposed facets of crystal materials and illuminates the synergetic mechanism of the simultaneous adsorption and activation of PDS via the regulation of co-exposing facets of the BiVO4 in the persulfate activation system.

• 单位
  南昌航空大学; 南昌大学