Importance of energy band theory and screening charge effect in piezo-electrocatalytical processes
Importance of energy band theory and screening charge effect in piezo-electrocatalytical processes
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DOI：
10.1016/j.electacta.2023.142730
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发表时间：
2023-06-22
影响因子：
6.6
通讯作者：
Tudela, Ignacio
中科院分区：
文献类型：
--
作者：
Bossl, Franziska;Menzel, Valentin C.;Tudela, Ignacio
本研究试图阐明围绕压电催化背后的“真正”机制的有争议的讨论：能带理论或筛选电荷效应。为此，利用ZnO、BaTiO3和BF-KBT-PT三种具有不同能带能级和压电性能的材料制备的压电催化剂降解水溶液中的罗丹明B，并采用超声和机械搅拌相结合的激发方式。结果表明，这两种机制实际上可能在整个过程中发挥重要作用，因为压电电催化剂最可能通过两种压电电催化机制产生自由基，从而实现最大的染料降解。
The present study tries to shed more light on the controversial discussion around the 'true' mechanism behind piezo-electrocatalysis: energy band theory or screening charge effects. For this purpose, piezo-electrocatalysts made of three different materials with different energy band levels and piezoelectric properties, ZnO, BaTiO3 and BF-KBT-PT, were used to degrade Rhodamine B in aqueous solutions where combined ultrasound and me-chanical agitation was used as the excitation method. The results suggest that both mechanisms may actually play an important role in the overall process, as the largest overall dye degradation was achieved with the piezo-electrocatalyst most likely to generate radicals via both piezo-electrocatalytic mechanisms.