Single-molecule, single-particle fluorescence imaging of TiO2-based photocatalytic reactions.
Single-molecule, single-particle fluorescence imaging of TiO2-based photocatalytic reactions.
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DOI：
10.1039/b919698f
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发表时间：
2010-11
影响因子：
46.2
通讯作者：
T. Tachikawa;T. Majima
中科院分区：
文献类型：
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作者：
T. Tachikawa;T. Majima
纳米结构的金属氧化物半导体，如TiO（2）和ZnO，作为光伏器件、水分解和环境净化的光催化剂、传感器、电池等的有前途的材料引起了极大的关注。在这篇评论中，我们着重于现场观察涉及电荷载流子和活性氧物种（ROS）的界面化学反应，例如单线态氧和羟基自由基，其通过使用单分子、单粒子荧光光谱法的TiO（2）纳米粒子的光激发产生。先进的荧光成像技术使我们能够确定与表面上不均匀分布的缺陷密切相关的光催化活性位点的位置。因此，这篇综述提供了一个很好的机会来了解单个催化剂颗粒内的时间和空间的异质性，允许在光催化反应的分析中潜在地使用单分子，单颗粒的方法（189参考文献）。
Nanostructured metal oxide semiconductors, such as TiO(2) and ZnO, have attracted great attention as the promising material for photovoltaic devices, photocatalysts for water splitting and environmental purification, sensors, batteries, etc. In this critical review, we have focused on the on-site observation of interfacial chemical reactions involving charge carriers and reactive oxygen species (ROS), such as singlet oxygen and the hydroxyl radical, generated by the photoexcitation of TiO(2) nanoparticles using single-molecule, single-particle fluorescence spectroscopy. Advanced fluorescence imaging techniques enable us to determine the location of the photocatalytically active sites that are closely related to the defects heterogeneously distributed on the surface. Consequently, this review provides a great opportunity to understand the temporal and spatial heterogeneities within an individual catalyst particle, allowing for the potential use of single-molecule, single-particle approaches in the analysis of photocatalytic reactions (189 references).