Abstract：
Vanadate-based photocatalysts have recently attracted substantial attention owing to their outstanding photocatalytic activity for degrading organic pollutants and generating energy via photocatalytic processes. However, the relatively high price of vanadium has hindered the development of vanadate-based photocatalysts for various applications. Spent catalysts obtained from oil refineries typically contain a significant quantity of vanadium, making them valuable for recovery and utilization as precursors for the production of high-value-added photocatalysts. In this study, we transformed the V present in spent catalysts produced by the petrochemical industry into ternary vanadate-based photocatalysts [BiVO4/InVO4/Ag3VO4 (BVO/IVO/AVO, respectively)] designed for water remediation. The ternary composites revealed an enhanced photocatalytic capability, which was 1.42 and 5.1 times higher than those of the binary BVO/IVO and pristine AVO due to the facilitated charge separation. The ternary photocatalysts not only effectively treated wastewater containing various organic dyes, such as methylene blue (MB), rhodamine 6G (R6G), and brilliant green (BG), but also exhibited remarkable photocatalytic performance in the degradation of antibiotics, reduction of Cr(VI), and bacterial inactivation. This paper proposes a feasible route for recycling industrial waste as a source of vanadium to produce highly efficient vanadate-based photocatalysts.
摘要：
钒酸盐基光催化剂由于其在降解有机污染物和通过光催化过程产生能量方面具有出色的光催化活性，因此最近引起了广泛关注。然而,钒的相对较高的价格阻碍了用于各种应用的钒酸基光催化剂的发展。从炼油厂获得的废催化剂通常含有大量的钒，使它们作为生产高附加值光催化剂的前体回收和利用有价值。在这项研究中,我们将石化行业生产的废催化剂中存在的V转化为三元钒酸基光催化剂[BiVO4/InVO4/Ag3VO4（BVO/IVO/AVO，分别)]设计用于水修复。三元复合材料显示出增强的光催化能力，由于促进的电荷分离，比二元BVO/IVO和原始AVO高1.42和5.1倍。三元光催化剂不仅有效处理了含各种有机染料的废水,如亚甲基蓝(MB)，罗丹明6G（R6G），和灿烂的绿色（BG），而且在抗生素的降解中也表现出显著的光催化性能，Cr(VI)的还原，和细菌灭活。本文提出了一种可行的途径，将工业废物作为钒的来源，以生产高效的钒酸基光催化剂。
