Carbon quantum dots-modified Z-scheme Bi12O17Cl2/NiAl-LDH for significantly boosting photocatalytic CO2 reduction

Recent progress of cocatalysts loaded on carbon nitride for selective photoreduction of CO2to CH4

“…81 In addition, carbon dots have been reported to show a unique up-conversion effect, which can take near-infrared light and produce UV/visible light, allowing it to be a potent energy transfer constituent in the preparation of hybrid heterojunctions. 11…”

“…So far, many approaches for converting CO 2 into usable chemicals and fuels have been explored, including photocatalytic, biochemical, electrochemical, plasma chemical and thermochemical processes. Unlike other strategies, photocatalysis directly driven by solar light can convert CO 2 into valuable derivatives (CO, CH 4 , CH 3 OH and longer-chain hydro-carbons) without external energy input and thus has become a research hotspot in recent years. 3 Among all the possible C 1 products, CH 4 is desirable for its high energy density and clean combustion characteristics and is regarded as an ideal product for photocatalytically selective reduction.…”

“…Unlike other strategies, photocatalysis directly driven by solar light can convert CO 2 into valuable derivatives (CO, CH 4 , CH 3 OH and longer-chain hydro-carbons) without external energy input and thus has become a research hotspot in recent years. 3 Among all the possible C 1 products, CH 4 is desirable for its high energy density and clean combustion characteristics and is regarded as an ideal product for photocatalytically selective reduction. 4 Although the transformation of CO 2 into CH 4 is thermodynamically favourable compared to the reduction of CO 2 to other hydrocarbon and oxocarbon products, it involves multiple proton-coupled electron transfers accompanied by the formation and adsorption of various C 1 intermediates.…”

“…6 Since Inoue et al 7 successfully achieved photoreduction of CO 2 over different semiconductor powders in suspensions, numerous semiconductors such as CdS, ZnO, layered double hydroxides (LDHs), g-C 3 N 4 , and WO 3 have been investigated for photocatalytic CO 2 reduction in the following decades. [8][9][10][11][12] g-C 3 N 4 is a metal-free semiconductor composed of triazine (C 3 N 3 ) (Fig. 1(b)) or tris-triazine/heptazine (C 6 N 7 ) (Fig.…”

Fabrication and characterization of Z-scheme BiOCl/C/Cu2O heterojunction nanocomposites as efficient catalysts for the photocatalytic reduction of CO2

“…17,18 Compared with type-II heterostructure, Z-scheme heterojunction is superior because it can separate electronhole pairs without reducing the redox potential. 19,20 Therefore, the combination of BiOCl and Cu 2 O is conducive to improving carrier separation and transfer, further perfecting the photocatalytic activity and stability under sunlight irradiation. 21 Although Cu 2 O/BiOCl heterojunction is reported to possess better photocatalytic activity than that of a single component, it is far from the expected purpose.…”