压电,作为一种独特的物理现象,在将环境机械能捕获到极化电荷中时表现出很高的有效性,提供了通过电子途径激活高级氧化过程的可能性。然而,有关通过压电催化增强Fe(VI)的信息有限。因此,我们的研究是首次将Bi2WO6纳米板用于Fe(VI)的压电催化以增强双酚A(BPA)降解。与单独的Fe(VI)相比,Fe(VI)/压电/Bi2WO6体系表现出优异的BPA去除能力,在pH9.0时,降解率提高了32.6%。根据实验和理论结果,Fe(VI),Fe(V),Fe(IV)和·OH被证实为反应中的反应活性物质,BPA去除的增加主要是由于Fe(IV)/Fe(V)物种的形成增强。此外,共存阴离子的影响(例如,Cl-,NO3-,SO42-和HCO3-),腐殖酸和不同的水基质(例如,去离子水,自来水和湖水)对BPA的降解进行了研究。结果表明,在这些条件下,Fe(VI)/压电/Bi2WO6系统仍然保持令人满意的BPA降解效率,保证未来在地表水处理中的实际应用。此外,中间体鉴定的结果,ECOSAR计算和细胞毒性表明,Fe(VI)/压电/Bi2WO6降解BPA会降低生态风险。总的来说,这些发现为Fe(VI)活化提供了一种新颖的机械能驱动压电催化方法,在碱性条件下实现高效污染物去除。
Piezo-electricity, as a unique physical phenomenon, demonstrates high effectiveness in capturing the environmental mechanical energy into polarization charges, offering the possibility to activate the advanced oxidation processes via the electron pathway. However, information regarding the intensification of Fe(VI) through piezo-catalysis is limited. Therefore, our study is the first to apply Bi2WO6 nanoplates for piezo-catalyzation of Fe(VI) to enhance bisphenol A (BPA) degradation. Compared to Fe(VI) alone, the Fe(VI)/piezo/Bi2WO6 system exhibited excellent BPA removal ability, with the degradation rate increased by 32.6% at pH 9.0. Based on the experimental and theoretical results, Fe(VI), Fe(V), Fe(IV) and •OH were confirmed as reaction active species in the reaction, and the increased BPA removal mainly resulted from the enhanced formation of Fe(IV)/Fe(V) species. Additionally, effects of coexisting anions (e.g., Cl-, NO3-, SO42- and HCO3-), humic acid and different water matrixes (e.g., deionized water, tap water and lake water) on BPA degradation were studied. Results showed the Fe(VI)/piezo/Bi2WO6 system still maintained satisfactory BPA degradation efficiencies under these conditions, guaranteeing future practical applications in surface water treatment. Furthermore, the results of intermediates identification, ECOSAR calculation and cytotoxicity demonstrated that BPA degradation by Fe(VI)/piezo/Bi2WO6 posed a diminishing ecological risk. Overall, these findings provide a novel mechanical energy-driven piezo-catalytic approach for Fe(VI) activation, enabling highly efficient pollutant removal under alkaline condition.