Yu Chuan, Lan Shenyu, Cheng Sentai, Zeng Lixi, Zhu Mingshan
Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Jinan University, Guangzhou 511443, China.
Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Jinan University, Guangzhou 511443, China.
J Hazard Mater. 2022 Feb 15;424(Pt B):127440. doi: 10.1016/j.jhazmat.2021.127440. Epub 2021 Oct 8.
Removal of pharmaceuticals and personal care products (PPCPs) from water by mechanical energy-driven piezocatalysis is a promising technology for environmental remediation that highly depends on the design of efficient piezocatalyst. In this study, Ba-substituted SrTiO piezoelectric materials were constructed and used for piezocatalytic degradation of carbamazepine (CBZ) from water. The BaSrTiO (BSTO-2) achieved the optimal performance, exhibiting 94.5% removal efficiency for CBZ (10 mg/L) after 30 min in the presence of BSTO-2 (0.5 g/L) and ultrasonic vibration (40 kHz, 100 W) with the minimal energy consumption. The kinetic rate constant was up to 0.106 min, which were 1.86 and 2.08 times as high as that of pure SrTiO and BaTiO, respectively. The enhanced piezocatalytic activity was attributed to its distorted structure and modified conductivity, resulting in a higher piezoelectric response and faster interfacial charge transfer. The involved reactive species, the effects of operational condition (catalyst dosage, CBZ concentration, solution pH, anions, water matrices and different pollutants), and the possible degradation products and their toxicity were discussed in detail. The work is of great significance to develop highly efficient piezocatalysts and highlights the potential of piezocatalysis in water remediation.
通过机械能驱动的压电催化从水中去除药物和个人护理产品（PPCPs）是一种很有前景的环境修复技术，这在很大程度上取决于高效压电催化剂的设计。在本研究中，构建了Ba取代的SrTiO压电材料，并将其用于从水中压电催化降解卡马西平（CBZ）。BaSrTiO（BSTO-2）表现出最佳性能，在存在BSTO-2（0.5 g/L）和超声振动（40 kHz，100 W）的情况下，30分钟后对CBZ（10 mg/L）的去除效率达到94.5%，且能耗最低。动力学速率常数高达0.106 min，分别是纯SrTiO和BaTiO的1.86倍和2.08倍。增强的压电催化活性归因于其扭曲的结构和改性的电导率，从而导致更高的压电响应和更快的界面电荷转移。详细讨论了涉及的活性物种、操作条件（催化剂用量、CBZ浓度、溶液pH值、阴离子、水基质和不同污染物）的影响以及可能的降解产物及其毒性。这项工作对于开发高效压电催化剂具有重要意义，并突出了压电催化在水修复中的潜力。
