Abstract Constructing high efficient nanostructured photocatalysts is meaningful for dyeing wastewater treatment. Herein, a new p-n heterostructured photocatalyst of NiS/BiVO4 (NiS/BVO) was well designed, synthesized and applied to photodegrade anion organic dye. Coupling p-type NiS nanoparticles on n-type decahedral nanostructured BVO cannot obviously increase the specific surface area, but can effectively increase the light harvesting, enhance the photocurrent response, and promote the separation and transfer of the photo-generated electron-holes. As a result, 0.7 molar ratio of NiS/BVO exhibited the best photocatalytic capability of 95.6 % within 90 min irradiation, possessing the highest degradation rate of 1.7970 h−1, which is almost 16 and 33 times higher than pure BVO (15.8 %, 0.1134 h−1) and NiS (7.9 %, 0.0543 h−1). Meanwhile, NiS/BVO has well photocatalytic stability in at least five cycling tests.

中文翻译：

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具有高效电荷分离的十面体 NiS/BiVO4 的 Pn 异质结构设计，用于增强有机染料的光降解

摘要 构建高效纳米结构光催化剂对印染废水处理具有重要意义。在此，设计、合成了一种新型的 NiS/BiVO4 (NiS/BVO) pn 异质结构光催化剂，并将其应用于光降解阴离子有机染料。在n型十面体纳米结构的BVO上偶联p型NiS纳米颗粒并不能明显增加比表面积，但可以有效增加光收集，增强光电流响应，促进光生电子空穴的分离和转移。因此，0.7 摩尔比的 NiS/BVO 在 90 分钟照射内表现出 95.6 % 的最佳光催化能力，具有最高的降解率 1.7970 h-1，几乎是纯 BVO（15.8 %， 0.1134 h-1) 和 NiS (7.9 %, 0.0543 h-1)。同时，