Effect of CoO<sub><i>x</i></sub> and Rh Cocatalysts on Local Charge Carrier Dynamics of BiVO<sub>4</sub> Particles by Pattern-Illumination Time-Resolved Phase Microscopy
Effect of CoO<sub><i>x</i></sub> and Rh Cocatalysts on Local Charge Carrier Dynamics of BiVO<sub>4</sub> Particles by Pattern-Illumination Time-Resolved Phase Microscopy
复制标题
图案照明时间分辨相显微镜研究 CoO<sub><i>x</i></sub> 和 Rh 助催化剂对 BiVO<sub>4</sub> 粒子局部载流子动力学的影响
DOI：
10.1021/acs.jpcc.2c06834
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Katayama Kenji
中科院分区：
文献类型：
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作者：
Chugenji Tatsuya;Pan Zhenhua;Katayama Kenji
钒酸铋（BiVO 4）颗粒的光催化性能可以通过在不同晶面上选择性负载助催化剂来提高。以BiVO 4为模型，采用图案照明时间分辨相位显微术研究了CoOxon氧化面和Rh还原面选择性负载助催化剂对局域载流子动力学的影响.通过电荷载流子响应的聚类分析来分析局部电荷载流子动力学，并且在存在和不存在助催化剂的情况下对它们进行分类。从有和没有清除剂的电荷载体类型的映射，捕获到助催化剂的电子和空穴响应被成功地分配，并且它们在颗粒和/或聚集体的局部位置处空间分离。CoOx和Rh可以分别将空穴和电子保持在几微秒和几百纳秒的量级。
Photocatalysis of bismuth vanadate (BiVO4) particles can be enhanced by selectively loading cocatalysts on different facets. Using BiVO4loaded with CoOxon oxidation facets and Rh on the reduction facets as a model, we studied the effects of selectively loaded cocatalyst on the local charge carrier dynamics by pattern-illumination time-resolved phase microscopy. The local charge carrier dynamics were analyzed by clustering analyses of the charge carrier responses, and they were categorized in the presence and absence of the cocatalysts. From the mapping of the charge carrier types with and without scavengers, the electron and hole responses trapped to cocatalysts were assigned successfully, and they were spatially separated at the local positions of the particles and/or aggregates. It was clarified that CoOxand Rh could keep the holes and electrons on the order of several microseconds and hundreds of nanoseconds, respectively.