Self-doped SrTiO3−δ photocatalyst with enhanced activity for artificial photosynthesis under visible light

Substitution Boosts Charge Separation for High Solar-Driven Photocatalytic Performance

“…22 Defects, as active sites where the charge carriers can be effectively separated, 23,24 have been recently reported to narrow the band gap as well. 25 Thus, the defect bismuth oxy-hybrid-halides have the potential to reconcile the apparent contradiction between bandgap narrowing and performance, and to provide an ideal platform to attain a comprehensive understanding of correlations between the structure, defects, and properties.…”

In situ synthesis of ordered mesoporous Co-doped TiO2 and its enhanced photocatalytic activity and selectivity for the reduction of CO2

“…[38][39][40][41][42] Besides, photocatalysts with ordered mesoporous structures have attracted growing interest due to their uniformly distributed porosity, ordered channels and high specific surface area. [43][44][45] The highly ordered mesoporous structure develops a high-efficient CO 2 adsorption ability and improves the separation and transport of electron-hole.…”

A perspective on perovskite oxide semiconductor catalysts for gas phase photoreduction of carbon dioxide

“…They found that the CH 4 yield of 0.15 wt.% Pt-loaded TiO 2 nanotube increased as the mole ratio of H 2 O and CO 2 increased, while the different H 2 O:CO 2 molar ratios had little effect on the CH 4 yield of 0.12 wt.% Pt-loaded TiO 2 nanoparticles. [33] The formation of CH 4 occurred mainly due to the high concentration of the surface OH group, which had been shown previously by Ikeue et al [34] The main products in a gas phase reaction system for photocatalytic reduction of CO 2 are generally CH 4 , which is usually on the μmol scale, as well as a small amount of CO. [8,[14][15][16] As we mentioned above, the photocatalytic reduction of CO 2 is a complex multi-electronic reaction process. There are two plausible pathways for CH 4 formation [4,20] :…”

“…In other words, the C source should be carefully investigated with respect to the production of CH 4 and CO from CO 2 in a gaseous CO 2 photoreduction system. Most researchers carry out a series of contrast experiments with different conditions including H 2 O, CO 2 , irradiation and catalyst to exclude the effects of carbon residues and organic adsorbates on the formation of hydrocarbon products [14][15][16] ; some other studies, however, reported a more precise and intuitive method: isotopic labeling ( 13 C and 18 O). [35][36][37] This approach can simultaneously evaluate the C source and the O source.…”

“…In addition, perovskite structures are expected to exhibit good photocatalytic activity as has been demonstrated in many studies. [12,13] Recently, a series of the perovskite type materials of the form ABO 3 (such as BaZrO 3 , [14] BaCeO 3 , [15] SrTiO 3 , [16,45,46] etc.) have been studied for the photocatalytic reduction of CO 2 .…”