Surface functionalization of piezoelectric greatly determines its piezo-catalytic activity and selectivity in that functional group affect specific reactants’ surface adsorption and activation abilities. Herein, we propose chemical functionalization on the surface of nano-scaled BaTiO₃ piezoelectric via a one-pot hydrothermal process using polyethylene glycol as surfactant, and evaluate its piezo-catalytic activity and selectivity by degrading model antibiotic and dye reactants under ultrasonic vibrations. Acetate or/and oxalic unidentate ligands on the surface of BaTiO₃ nanobelts can be formed by controlling precursor and hydrothermal parameters. Particularly, oxalic acid functionalized BaTiO₃ nanobelts presented a high piezo-catalytic rate constant of 0.068 min⁻¹ for Rhodamine B solution and maintained >87% degradation efficiency within 30 min under the condition of ultrasonic bath with 40 kHz and 100 W, which was mainly ascribed to piezo-sensitization effect. This work provides references for the preparation of chemical functionalized catalysts and also contributes to the development of novel catalysts for special applications.

压电体的表面官能化极大地决定了其压电催化活性和选择性，因为该官能团影响特定反应物的表面吸附和活化能力。在此，我们提出通过使用聚乙二醇作为表面活性剂的一锅水热法在纳米级 BaTiO ₃压电体表面进行化学官能化，并通过在超声波振动下降解模型抗生素和染料反应物来评估其压电催化活性和选择性。BaTiO ₃纳米带表面的乙酸盐或/和草酸单齿配体可以通过控制前驱体和水热参数形成。特别是草酸功能化的 BaTiO ₃纳米带对罗丹明 B 溶液具有 0.068 min ^-1的高压电催化速率常数，并在 40 kHz 和 100 W 的超声波浴条件下在 30 分钟内保持 >87% 的降解效率，这主要归因于压电敏化效应. 该工作为化学功能化催化剂的制备提供了参考，也有助于开发用于特殊应用的新型催化剂。