Understanding the unique S-scheme charge migration in triazine/heptazine crystalline carbon nitride homojunction.

ABSTRACT: Understanding charge transfer dynamics and carrier separation pathway is challenging due to the lack of appropriate characterization strategies. In this work, a crystalline triazine/heptazine carbon nitride homojunction is selected as a model system to demonstrate the interfacial electron-transfer mechanism. Surface bimetallic cocatalysts are used as sensitive probes during in situ photoemission for tracing the S-scheme transfer of interfacial photogenerated electrons from triazine phase to the heptazine phase. Variation of the sample surface potential under light on/off confirms dynamic S-scheme charge transfer. Further theoretical calculations demonstrate an interesting reversal of interfacial electron-transfer path under light/dark conditions, which also supports the experimental eviden

SUBMITTER: Li F 

PROVIDER: S-EPMC10317968 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature