We constructed a single-molecule fluorescence imaging technique to monitor the spatiotemporal distribution of the hydroxyl radical (•OH) on TiO2-attached multiwalled carbon nanotubes (TiO2-MWCNTs) in aqueous. We found the heterogeneous distribution of •OH is closely related to the composition and heterostructure of the catalysts. The dynamic •OH production rate was evaluated by counting the single-molecule fluorescent bursts. We further confirmed the production of •OH on TiO2-MWCNTs mainly occurred via electron reduction during the aqueous photocatalytic process. Our study reveals the mechanism of reactive oxygen species involved photocatalytic reaction and guides the design of advanced semiconductor photocatalysts.

Synthesizing arylamines with high selectivity via hydrogenation of nitroaromatic is a long-standing challenge because of the complex reaction pathways. Revealing the route regulation mechanism is the key to obtain high...

As many nanoparticles (NPs) have been exploited as drug carriers to overcome the resistance of blood-brain barrier (BBB), reliable in vitro BBB models are urgently needed to help researchers to...

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