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Enhanced tribocatalytic degradation of dye pollutants through governing the charge accumulations on the surface of ferroelectric barium zirconium titanate particles
Nano Energy ( IF 17.6 ) Pub Date : 2022-06-20 , DOI: 10.1016/j.nanoen.2022.107519
Qing Tang , Mengde Zhu , Hongfang Zhang , Ju Gao , Kin Wing Kwok , Ling-Bing Kong , Yanming Jia , Laijun Liu , Biaolin Peng

The phenomenon triboelectricity has recently been demonstrated great potentials for mitigating environmental pollutions. In this study, with the aim of investigating the crucial parameters for the phenomenon, a typical perovskite ferroelectric micron-sized Ba(Zr0.05Ti0.95)O3 (BZT) particle has been fabricated as a tribocatalyst by the conventional solid state method for degrading the common organic dye pollutants such as rhodamine B (RhB), methylene blue (MB) and methyl orange (MO) via magnetic stirring. Our results show that the accumulation of triboelectric charges on the micron-sized particle surfaces is crucial for inducing high performances of the tribocatalysis. Various experimental parameters such as surface roughness of the reaction vessel, triboelectric charge density (TECD) and polarization states of the ferroelectric tribocatalyst have also been shown important for achieving the strong tribocatalytic activity. A high kinetic rate constant of 0.4482 h−1 (or 100% degradation in 7 h) has been achieved in the degradation of RhB using poled micron-sized BZT particles stirred with polytetrafluoroethylene (PTFE) magnetic bars (which can generate a high TECD). The enhanced ferroelectricity and tilted bandgap of the tribocatalyst caused by a higher nanodomain density and dielectric screening phenomenon through the poling treatment have been considered in elucidating the high performance engendered by the ferroelectric tribocatalyst.



中文翻译:

通过控制铁电钛酸钡锆颗粒表面的电荷积累增强染料污染物的摩擦催化降解

摩擦电现象最近已被证明在减轻环境污染方面具有巨大潜力。在这项研究中,为了研究这一现象的关键参数,一个典型的钙钛矿铁电微米级 Ba(Zr 0.05 Ti 0.95 )O 3(BZT)颗粒已通过常规固态方法制成摩擦催化剂,用于通过磁力搅拌降解罗丹明B(RhB)、亚甲蓝(MB)和甲基橙(MO)等常见的有机染料污染物。我们的结果表明,微米级颗粒表面上摩擦电荷的积累对于诱导摩擦催化的高性能至关重要。各种实验参数,如反应容器的表面粗糙度、摩擦电荷密度 (TECD) 和铁电摩擦催化剂的极化状态也被证明对于实现强摩擦催化活性很重要。0.4482 h -1的高动力学速率常数(或 7 小时内 100% 降解)已经在 RhB 的降解中实现,使用极化的微米级 BZT 颗粒与聚四氟乙烯 (PTFE) 磁棒(可产生高 TECD)搅拌。在阐明铁电摩擦催化剂产生的高性能时,已经考虑了通过极化处理产生的更高的纳米域密度和介电屏蔽现象引起的摩擦催化剂的增强的铁电性和倾斜的带隙。

更新日期:2022-06-24
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