Construction of a multi-interfacial-electron transfer scheme for efficient CO₂ photoreduction: a case study using CdIn₂S₄ micro-flower spheres modified with Au nanoparticles and reduced graphene oxide

Abstract

CdIn2S4 micro flower spheres modified with Au NPs and rGO has been designed for the CO2 photoreduction. The photoproduction yields of CO and CH4 were 4 and 5 times higher...

Constructed Z-Scheme g-C3N4/Ag3VO4/rGO Photocatalysts with Multi-interfacial Electron-Transfer Paths for High Photoreduction of CO2

“…According to our previous work, CN has a suitable conduction band (CB) position to support it to reduce CO 2 to CO (CO/CO 2 , −0.54 eV) and CH 4 (CH 4 /CO 2 , −0.24 eV). 12,28 The Z-scheme 2D−0D−2D heterojunction provides multiple channels for the transmission of electrons (Ag 3 VO 4 → CN and Ag 3 VO 4 → rGO → CN). 12 The potential electrontransfer method conforms to the Z-scheme, which can effectively retain the photogenerated electrons with strong reduction ability on CN.…”

“…12,28 The Z-scheme 2D−0D−2D heterojunction provides multiple channels for the transmission of electrons (Ag 3 VO 4 → CN and Ag 3 VO 4 → rGO → CN). 12 The potential electrontransfer method conforms to the Z-scheme, which can effectively retain the photogenerated electrons with strong reduction ability on CN. Simultaneously, the direct interaction between rGO and CN (π−π conjugation) can promote the excitation and transmission of electrons (rGO → CN) 42,46 and further improve the photocatalytic CO 2 reduction performance of the composite material.…”

“…Graphite carbon nitride (g-C 3 N 4 ) is a common non-metal semiconductor in photocatalysis research and has a relatively stable chemical property and suitable band gap (2.7 eV), so it can absorb the part of visible light (λ ≤ 460 nm) . Recent studies have shown that g-C 3 N 4 has excellent application prospects in the field of photocatalytic CO 2 reduction. − The photocatalytic efficiency of bulk g-C 3 N 4 is limited by the high recombination rate of electron–hole pairs and the poor photogenerated electrons’ transfer ability. , Common improvements for bulk g-C 3 N 4 to offset these defects have been widely reported, such as morphology control, doping modification, construction of a heterojunction, and so on. , Among them, the 2D g-C 3 N 4 obtained by morphology control can effectively enhance the separation and transfer of carriers and provide a larger specific surface area to adsorb more CO 2 . , For example, Miao et al. prepared 2D g-C 3 N 4 by acid treatment and liquid exfoliation, which effectively improved the problem of low-resistance transmission efficiency of g-C 3 N 4 .…”

Self-assembled transition metal chalcogenides@CoAl-LDH 2D/2D heterostructures with enhanced photoactivity for hydrogen evolution

“…), which possess desirable characteristics, such as adjustable direct band gap and wide optical absorption range, representing a family of visible light-responsive photocatalysts with promising performances for H 2 evolution. 8–12 On the other hand, their photocatalytic activity is limited by the high bulk recombination of photogenerated charge carriers and the deficiency of active sites. In this regard, the state-of-the-art approach to boost the photocatalytic performance is constructing TMC-based hybrid photocatalyst systems.…”

“…In this regard, the state-of-the-art approach to boost the photocatalytic performance is constructing TMC-based hybrid photocatalyst systems. By combining the advantages of each component and the associated synergistic effects, multiple contact interfaces and electron transfer paths can be constructed for the efficient transfer of photogenerated carriers to reduce the recombination of photogenerated charge carriers, 8,13 thereby boosting the solar conversion efficiency.…”