For effective treatment of wastewater, synergetic removal of organics and heavy metals is of practical importance. Herein, we constructed a synergistic photoelectrocatalytic (PEC) system based on advanced photoelectrodes to realize efficient removal of BPA and Cr(VI). A 0D BiVO quantum dots (BQDs) decorated 3D TiO photoelectrode (0D/3D BQD@TiO) was designed with “Facet/Type-II” dual heterojunctions (TiO facet heterojunction and BiVO/TiO heterojunction). Complete removal and fast kinetics were achieved for both BPA (0.18 min) and Cr(VI) (0.82 M min). O and h were confirmed as the main role for BPA oxidation and Fukui index () predicted the active sites of BPA molecule for O attack. Meanwhile, Cr(V) intermediate was determined through PMSO probing experiment. The practical application prospect was comprehensively evaluated via examining the removal in actual wastewater and influencing factors. Finally, we examined the reusability of this system and extend its application to various kinds of organics coexisting with Cr(VI).

中文翻译：

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基于0D/3D BQD@TiO2光电极的氧化还原光电催化系统同时去除BPA和Cr(VI)：对机理和协同效应的新见解


为了有效处理废水，协同去除有机物和重金属具有重要的实际意义。在此，我们构建了一种基于先进光电极的协同光电催化（PEC）系统，以实现BPA和Cr（VI）的高效去除。 0D BiVO 量子点（BQD）装饰的 3D TiO 光电极（0D/3D BQD@TiO）采用“Facet/Type-II”双异质结（TiO 面异质结和 BiVO/TiO 异质结）设计。 BPA（0.18 分钟）和 Cr(VI)（0.82 M 分钟）均实现了完全去除和快速动力学。 O和h被证实是BPA氧化的主要作用，福井指数（）预测了BPA分子对O攻击的活性位点。同时通过PMSO探测实验测定了Cr(V)中间体。通过考察实际废水中的去除效果及影响因素，综合评价其实际应用前景。最后，我们检验了该系统的可重复使用性，并将其应用扩展到与 Cr(VI) 共存的各种有机物。