Photocatalytic reduction of CO2 into CO over nanostructure Bi2S3 quantum dots/g-C3N4 composites with Z-scheme mechanism

Nanostructured Metal Sulfides: Classification, Modification Strategy, and Solar‐Driven CO2 Reduction Application

“…to fabricate the Bi 2 S 3 QDs/g‐C 3 N 4 photocatalyst. [ 136 ] 20 wt% Bi 2 S 3 QDs/g‐C 3 N 4 displayed the highest CO production rate of 6.84 µmol g −1 h −1 , which was 4 times larger than that of bulk g‐C 3 N 4 . With more negative reduction potential of g‐C 3 N 4 than Bi 2 S 3 nanotubes, the desired reduction reactions such as deoxygenation to CO and hydrogenation to methane of CO 2 took place on the CB of g‐C 3 N 4 powered by simulated sunlight.…”

Recent Progress in Materials Exploration for Thermocatalytic, Photocatalytic, and Integrated Photothermocatalytic CO2‐to‐Fuel Conversion

“…Therefore, the hierarchical photocatalyst with Z‐scheme construction broadens light absorption, improves the binding energy of CO 2 molecules, facilitates the separation of electron−hole pairs, and increases the reduction ability of photoinduced electrons, which synergistically enhance its performance toward PCR. Similarly, other photocatalysts like Co 3 O 4 , [ 153 ] WO 3 , [ 154 ] MoS 2 , [ 155 ] Bi 2 S 3 , [ 156 ] SnS 2 , [ 157 ] SnFe 2 O 4 , [ 158 ] NiMoO 4 , [ 159 ] FeWO 4 , [ 160 ] BiVO 4 , [ 161 ] and Cu 2 V 2 O 7 [ 162 ] have also been employed to match the energy bandgap of g‐C 3 N 4 nanosheets, forming efficient visible light‐driven Z‐scheme systems for PCR. As aforementioned, g‐C 3 N 4 ‐based Z‐scheme photocatalysts construct a close interfacial contact between g‐C 3 N 4 and another semiconductor, which contributes to the improved CO 2 photoreduction into high‐value‐added carbonaceous compounds including CO, CH 4 , CH 3 OH, and HCOOH, etc.…”

Recent advancements in g-C3N4-based photocatalysts for photocatalytic CO2 reduction: a mini review

“…Although it has numerous Lewis base sites, e.g., Brønsted base sites and nucleophile sites that are favourable for CO 2 adsorption, bulk g-C 3 N 4 prepared by direct calcination has a relatively small surface area. Therefore, several modications including structural tuning, [31][32][33][34][35][36][37] elemental doping, [38][39][40][41][42][43][44][45] addition of cocatalyst, [46][47][48][49][50][51][52][53][54][55][56][57][58][59][60] and compositing [61][62][63][64][65][66][67][68][69][70] have been used to increase the adsorption and obtain more effective charge separation.…”

“…Most of these are also well designed in terms of structure for further enhancements in CO 2 photoreduction yields. [66][67][68] For instance, Ogale et al synthesized a 2D g-C 3 N 4 /NiAl-LDH heterojunction with strong electrostatic interactions between positively charged NiAl-LDH and negatively charged g-C 3 N 4 . 66 The enhancement of the photocatalytic activity was mainly ascribed to the excellent interfacial contacts at the 2D/2D interface.…”

“…The heterojunction exhibited 4-fold higher CO yield than the pristine g-C 3 N 4 . 67 The photocatalytic mechanism of Z-scheme heterojunctions can be revealed by PL analysis and DFT calculations. Yu et al prepared a g-C 3 N 4 /ZnO binary composite for photocatalytic CO 2 reduction to CH 3 OH.…”