Photo-induced conversion of type-II CoPc/BiOBr-NSs to S-scheme heterostructure for boosting CO2 photoreduction

Ferroelectric polarization reversals in C2N/α-In2Se3 van der Waals heterostructures: a conversion from the traditional type-II to S-scheme

“…It can be found that according to the specific reaction to be catalyzed, different pH environments can be selected to achieve the best results. S-scheme heterogeneous structures are more promising in photocatalysts compared to traditional type-II heterogeneous structures owing to their robust redox capabilities ( Fu et al, 2019 ; Li et al, 2022 ; Li et al, 2023 ). Compared with the traditional type-II heterostructures, the photogenerated electrons and holes accumulate in the conduction band and valence band of the reduced semiconductor photocatalyst and the oxidized semiconductor photocatalyst, respectively, resulting in weakened redox ability.…”

Selective CO2‐to‐C2H4Photoconversion Enabled by Oxygen‐Mediated Triatomic Sites in Partially Oxidized Bimetallic Sulfide

“…[19] More importantly, the peak located at 1746 cm À 1 belonged to CHO* group, demonstrating the process of CO 2 protonation. [20] Also, the absorption bands at 1210 and 1534 cm À 1 were assigned to the CÀ OH and symmetric OCO stretching modes of a hydrogenated dimer intermediate. [14a, 21] Notably, the HOOCCOH* intermediate generally turned into C 2 H 4 accompanied by subsequent hydrogenation process, while the presence of absorption band at 1697 cm À 1 was attributed to *C 2 H 4 group, providing solid evidence in the process of CO 2 photoreduction to C 2 H 4 .…”

Fabrication of a PCN/BiOBr 2D hybrid with improved photocatalytic performance of 2,4-dichorophenol degradation

“…For this, various strategies have been carried out, such as element doping, noble metal loading, and heterojunction construction. [20][21][22][23] Among the methods for improving photocatalytic activities of BiOBr, constructing heterojunctions with another semiconductor is considered to be a promising method for improving its charge separation efficiency, and thereby to boost its photocatalytic activities. [24][25][26] Generally, introducing a semiconductor with proper band structure to form a S-type heterojunction is a feasible strategy for simultaneously overcoming the charge carrier recombination and the improper conduction band position problems, for which the semiconductor with a positive valence band (VB) provides holes for the oxidation half-reaction and the other semiconductor with a negative conduction band (CB) provides electrons for the reduction halfreaction.…”

“…[24][25][26] Generally, introducing a semiconductor with proper band structure to form a S-type heterojunction is a feasible strategy for simultaneously overcoming the charge carrier recombination and the improper conduction band position problems, for which the semiconductor with a positive valence band (VB) provides holes for the oxidation half-reaction and the other semiconductor with a negative conduction band (CB) provides electrons for the reduction halfreaction. 9,12,22,24,25 Hence, the charge separation of BiOBr is expected to be improved by constructing S-type heterojunction. Polymeric carbon nitride (PCN), as a sheet-structure material with a relatively negative conduction band position, is considered to be an appropriate material to construct S-type heterojunctions with BiOBr.…”

“…For this, various strategies have been carried out, such as element doping, noble metal loading, and heterojunction construction. 20–23…”