This study investigated the influence of adding peroxydisulfate (PDS) to a photoelectrocatalysis (PEC) system using self-doped TiO₂ nanotube arrays (bl-TNAs) for organic pollutant degradation. The addition of 1.0 mM PDS increased the bisphenol-A (BPA) removal efficiency of PEC (PEC/PDS) from 65.0% to 85.9% within 1 h. The enhancement could be attributed to the high formation yield of hydroxyl radicals (^·OH), increased charge separation, and assistance of the sulfate radicals (SO₄^·−). The PDS concentration and applied potential bias were influential operating parameters for the PEC/PDS system. In addition, the system exhibited a highly stable performance over a wide range of pH values and background inorganic and organic constituents, such as chloride ions, bicarbonate, and humic acid. Further, the degradation performance of the organic pollutant mixture, including BPA, 4-chlorophenol (4-CP), sulfamethoxazole (SMX), and carbamazepine (CBZ), was evaluated in 0.1 M (NH₄)₂SO₄ solution and real surface water. The degradation efficiency increased in the order of CBZ < SMX < 4-CP < BPA in the PEC and PEC/PDS systems with both water matrices. Compared with the PEC system, the PEC/PDS (1.0 mM) system showed a threefold higher pseudo first-order reaction rate constant for BPA among pollutant mixtures in surface water. This was attributed to enhanced ^·OH production and the selective nature of SO₄^·−. The pseudo first-order reaction rate constants of other pollutants, i.e., 4-CP, SMX, and CBZ increased ca. twofold in the PEC/PDS system. The results of this study showed that the PEC/PDS system with bl-TNAs is a viable technology for oxidative treatment.

这项研究调查了添加过氧化二硫酸盐（PDS）到使用自掺杂TiO ₂纳米管阵列（bl-TNA）的光电催化（PEC）系统中有机污染物降解的影响。1.0 mM PDS的添加在1小时内将PEC（PEC / PDS）的双酚A（BPA）去除效率从65.0％提高到85.9％。增强可以归因于羟基自由基（^· OH）的高形成产率，增加的电荷分离以及硫酸根自由基（SO ₄ ^·-）。PDS浓度和施加的电势偏差是PEC / PDS系统的有影响的运行参数。此外，该系统在很宽的pH值范围和背景无机和有机成分（例如氯离子，碳酸氢根和腐殖酸）中均表现出高度稳定的性能。此外，在0.1 M（NH ₄）₂ SO _4中评估了BPA，4-氯苯酚（4-CP），磺胺甲恶唑（SMX）和卡马西平（CBZ）等有机污染物混合物的降解性能。溶液和地表水。在两种水基的PEC和PEC / PDS系统中，降解效率按CBZ <SMX <4-CP <BPA的顺序增加。与PEC系统相比，PEC / PDS（1.0 mM）系统在地表水中污染物混合物中对BPA的假一级反应速率常数高出三倍。这归因于^· OH产量增加和SO ₄ ^·−的选择性。其他污染物（即4-CP，SMX和CBZ）的伪一级反应速率常数约增加。在PEC / PDS系统中是双重的。这项研究的结果表明，带有bl-TNA的PEC / PDS系统是一种可行的氧化处理技术。