Cu doping and Ti3C2OH quantum dots co-modifications of Zn3In2S6 boosted photocatalytic reduction of CO2 to CO via accelerating carriers transfer and enhancing CO2 adsorption and activation

Emerging carbon-based quantum dots for sustainable photocatalysis

“…The enhanced activity is mainly due to the Cu 0.05 Zn 2.95 In 2 S 6 @Ti 3 C 2 OH QDs having the strongest CO 2 adsorption and activation abilities. 136 Additionally, Zeng et al successfully synthesized Ti 3 C 2 /Cu 2 O nanowires by the heterogeneous coupling of Ti 3 C 2 QDs with Cu 2 O nanowires through a simple hydrothermal method. The results show that the existence of Ti 3 C 2 QDs not only effectively improves the crystallization stability of Cu 2 O (Fig.…”

Cu–Fe bimetallic MOF enhances the selectivity of photocatalytic CO2 reduction toward CO production

“…The in situ FT-IR tests confirm that Fcdc ligand-modified Cu-MOF–Fcdc-20% is superior to unmodified Cu-MOF in promoting the photoreduction of CO 2 to the intermediate (COOH*), which in turn improves its selectivity and catalytic efficiency for CO production. Another explanation for the easy production of CO in this system instead of CH 4 would be that the formation of CO requires only 2 electrons, whereas CH 4 requires 8 electrons, which is dynamically disadvantageous in comparison with the formation of CO. 68 Finally, based on the above experimental data, it can be confirmed that the Cu-MOF–Fcdc-20% material containing the Fcdc ligand is an efficient photocatalyst for the photoreduction of CO 2 to CO in comparison with Cu-MOF. The photocatalytic reduction mechanism of CO 2 to CO by Cu-MOF–Fcdc-20% is clearly shown by the reaction schematic in Fig.…”

Synergistic Spatial Confining Effect and O Vacancy in WO3 Hollow Sphere for Enhanced N2 Reduction

“…The evaluation of carrier separation efficiency is conducted via steady-state PL emission spectroscopy. As shown in Figure 5d, under excitation light at a wavelength of 453 nm, there is an obvious PL quenching of WO 3−x -HS compared to WO 3 -bulk, indicating the photogenerated electron-hole recombination is suppressed and the photogenerated carrier utilization efficiency is higher [49]. The reason for this result may be that the hollow structure with a relatively thin shell of WO 3−x -HS is beneficial for the migration rate and separation efficiency of photogenerated carriers.…”