Designing a 0D/2D S‐Scheme Heterojunction over Polymeric Carbon Nitride for Visible‐Light Photocatalytic Inactivation of Bacteria

Abstract

Constructing heterojunctions between two semiconductors with matched band structure is an effective strategy to acquire high‐efficiency photocatalysts. The S‐scheme heterojunction system has shown great potential in facilitating separation and transfer of photogenerated carriers, as well as acquiring strong photoredox ability. Herein, a 0D/2D S‐Scheme heterojunction material involving CeO2 quantum dots and polymeric carbon nitride (CeO2/PCN) is designed and constructed by in situ wet chemistry with subsequent heat treatment. This S‐scheme heterojunction material shows high‐efficiency photocatalytic sterilization rate (88.1 %) towards Staphylococcus aureus (S. aureus) under visible‐light irradiation (λ≥420 nm), which is 2.7 and 8.2 times that of pure CeO2 (32.2 %) and PCN (10.7 %), respectively. Strong evidence of S‐scheme charge transfer path is verified by theoretical calculations, in situ irradiated X‐ray photoelectron spectroscopy, and electron paramagnetic resonance.

Designing effective and stable S‐scheme RGO/AgVO3/AgBr hybrid with enhanced photocatalytic performance

“…Under the irradiation of visible light, the electrons of AgVO 3 and AgBr will be changed from ground state to excited state. On the one hand, some excited electrons will transform to the surface of RGO, then inhibiting the recombination of electrons and holes 54 . On the other hand, the calculated E VB and E CB of AgVO 3 were +2.47 eV and +0.25 eV, respectively, and those of AgBr were +1.57 eV and −0.57 eV according to the same calculation.…”

Highly efficient photosynthesis of hydrogen peroxide in ambient conditions

“…As shown in SI Appendix, Fig. S10, the positive slopes of the plots indicated the n-type nature of NBCN, ZnPPc, and ZnPPc-NBCN, and the E fb values were evaluated as −1.08 V, −1.2 V, and −1.2 V versus the Ag/AgCl electrode [−0.47, −0.59, and −0.59 V versus reversible hydrogen electrode (RHE)] (27,28).…”

Construction of Bi2Fe4O9/red phosphorus heterojunction for rapid and efficient photo‐reduction of Cr(VI)

“…Photocatalytic technology is an efficient, economically feasible, and environment friendly method for the treatment of heavy-metal pollutants in the aqueous environment. [1][2][3][4][5][6] As the core of photocatalytic technology, photocatalysts have been the focus of research and difficulties for scholars 7 . Charge separation and transport in semiconductor photocatalysts are important factors in determining the solar energy conversion efficiency of photocatalysis and are even considered a bottleneck in the field of photocatalysis.…”

“…Photocatalytic technology is an efficient, economically feasible, and environment friendly method for the treatment of heavy‐metal pollutants in the aqueous environment 1–6 . As the core of photocatalytic technology, photocatalysts have been the focus of research and difficulties for scholars 7 .…”