Study on the charge carrier transport property generated by photo/piezo synergy field over barium strontium titanate
Study on the charge carrier transport property generated by photo/piezo synergy field over barium strontium titanate
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DOI：
10.1016/j.nanoen.2023.108600
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发表时间：
2023-09
期刊：
影响因子：
17.6
通讯作者：
Yawei Jiang;Fenghui Li;XuHui Li;Wenjian Fang;Xiaodong Si;Tao Zhou;Yulin Min;Yongsheng Liu-
中科院分区：
文献类型：
--
作者：
Yawei Jiang;Fenghui Li;XuHui Li;Wenjian Fang;Xiaodong Si;Tao Zhou;Yulin Min;Yongsheng Liu-
压电催化和光催化的结合在污染物降解和水分解等领域得到了广泛的关注。然而，由于在反应过程中难以观察到纳米晶体的极化，因此载流子的输运性质尚不清楚。本研究旨在解决这一问题，采用固相法制备Ba1−xSrxTiO3（BST）固溶体，并研究离子掺杂对压电光催化活性的影响。通过水分解和染料降解对光催化和局部压电催化耦合进行了评价。有趣的是，局部压电催化的引入产生了相反的效果：它减少了光催化制氢，但增加了光催化RhB降解的速度。可能的机理是催化剂对H+和自由基的不同吸附会影响局部压电电位的方向，从而改变光生载流子的转移路径。
The combination of piezoelectric catalysis and photocatalysis has garnered significant attention in the fields of pollutant degradation and water splitting. However, the charge carrier transport property remains unclear due to the difficulty in observing nanocrystal polarization during the reaction process. This study aimed to address this issue by preparing Ba1−xSrxTiO3(BST) solid solutions using the solid-phase method and examining the effect of ion doping on piezoelectricity-photocatalytic activity. The photocatalysis and local piezoelectric catalysis coupling was evaluated through water decomposition and dye degradation. Interestingly, the introduction of local piezoelectric catalysis had the opposite effect: it reduced photocatalytic hydrogen production but increased the rate of photocatalytic RhB degradation. The possible mechanism was proposed that the different adsorption of H+and radicals on the catalysts would affect the direction of the local piezoelectric potential and then change the photo-generated carriers' transfer path.