Scheme 1

Construction of photocatalysts with effective charge transfer. (a) 1-dimensions nanotube photocatalysts; (b) limited in-plane charge transfer in g-C3N4-based photocatalysts."

Fig 1

Photocatalytic Property of the As-Prepared Catalysts. (a) Flowchart for the Preparation of TCN and Pr-TCN, (b) XRD patterns and (c) FTIR spectrum of TCN and Pr-TCN catalysts. (d) H2O2 generation over the synthesized CN-based photocatalysts under visible light irradiation, (e) cycling performance of 5% Pr-TCN."

Fig 2

Phase structure of as-prepared photocatalysts. (a) SEM image of 5% Pr-TCN, (b) HAADF-STEM images and (c) corresponding elements mappings of 5% Pr-TCN, (d) C 1s and (e) N 1s of TCN and 5% Pr-TCN, (f) Pr 3d HR-XPS of TCN and 5% Pr-TCN."

Fig 3

Band structure of TCN and 5%Pr-TCN. (a) UV-Vis absorption spectrum and corresponding Tauc plots, (b) Mott-Schottky curves, (c) band structures of TCN and 5%Pr-TCN. (d) T/PDOS of Pr-CN, (e) LUMO and HOMO images of Pr-CN."

Fig 4

Dynamic behavior of photogenerated charge carriers. (a) Steady-state photoluminescence (PL) and (b) time-resolved photoluminescence (TRPL) spectroscopy of TCN and 5% Pr-TCN, (c) Electron spin resonance spectroscopy signals of ·O2−-DMPO and ·OOH-DMPO of TCN and 5% Pr-TCN, differential charge densities (d) Pr-CN, (e) O2/Pr-CN, and (f) OOH/Pr-CN."

Fig 5

Photocatalytic mechanism of Pr-TCN for H2O2 generation. Photocatalytic efficiency (a) upon addition of capture agents and (b) different atmosphere, (c) in situ FTIR spectra of TCN and 5% Pr-TCN, (d) Free energy diagram for the energetics of O2 reduction."