人工光合成机理的时空分辨光谱研究进展

Spatial and temporal characterization on artificial photosynthesis mechanism

综述了时空分辨光谱技术在人工光合成机理研究中的主要结果和最新进展,揭示了人工光合成中光生电子和空穴的分离、复合和反应等过程,利用成像光谱直接观测光生电荷的空间分布及其作用规律。时空分辨光谱的表征结果很好地解释了催化剂晶相、助催化剂的担载、相结结构的构筑晶面调控等策略在光电催化过程中的作用机制.

Artificial photosynthesis,which converts solar energy to chemical energy,is an important strategy for solar energy utilization.Efficient separation of photoinduced electrons and holes is a key issue in artificial photosynthesis.To investigate the photoinduced electrons and holes using techniques of high temporal and spatial resolutions is crucial to the photo(electro)catalytic mechanism study.This review summarizes the main results and latest development in photo(electro)catalytic mechanism research with time--resolved spectroscopy and imaging spectroscopy.It is shown that charge separation,recombination and reaction process are well characterized by time-resolved spectroscopy while the spatial distribution of photogenerated charges and their roles in artificial photosynthesis are revealed by imaging spectroscopy.