Co-modification of F− and Fe(III) ions as a facile strategy towards effective separation of photogenerated electrons and holes

Synergistic effect of Co(II)-hole and Pt-electron cocatalysts for enhanced photocatalytic hydrogen evolution performance of P-doped g-C3N4

“…The high-resolution Co 2p XPS spectrum of Co(II)/PCN-2 exhibits two strong peak located at 780.3 and 795.7 eV, respectively, which are ascribed to Co 2p1/2 and Co 2p3/2, respectively, manifesting the existence of the Co(II) in the heterojunction [43]. Considering a low-temperature hydrolysis process in this study, the Co(II) cocatalyst may be in the amorphous CoOOH-like structure, similar to the reported phenomenon of the other transition metal (such as Fe elements) [44]. The high-resolution P 2p XPS spectrum exhibits a strong peak at 133.4 eV attributing to P-N coordination, revealing that P atoms may substitute the C atom in the triazine rings of the g-C3N4 and thus form P-N bonds [45].…”

Graphene in Photocatalysis: A Review

“…Meanwhile, the noble metal based oxides (e.g., RuO 2 , IrO x ), cost‐acceptable cobalt based species (e.g., CoO x , Co(II), Co(OH) 2 , Nocera Co–Pi), MnO x FeOOH, and NiOOH have been demonstrated to be excellent water‐oxidation co‐catalysts to boost the photocatalytic O 2 evolution over different semiconductors. Similarly, various possible co‐catalyst‐modification strategies, such as noble metals (Pt, Au, Ag), H 3 BO 3 , H 3 PO 4 , MoS 2 , graphene, Cu(II)/Fe(III) clusters, and their hybrids have been extensively employed to improve the O 2 adsorption and reduction on photocatalysts, thus facilitating more efficient capture of the photogenerated electrons for further improved photo‐degradation activities. In addition, the noble metals/alloys (Pt, Au, Ag, Pd, and Cu x Pt y ), earth‐abundant metal compounds (Cu 2 O, NiO x , Ni@NiO), graphene, complex, and their composites have been widely employed as co‐catalysts to improve the photocatalytic activity and selectivity for CO 2 reduction.…”

Photocatalysis fundamentals and surface modification of TiO2 nanomaterials

“…The enhanced activity was ascribed to the reduced recombination rate of photo-generated electrons and holes and enhanced formation of free OH radicals [392,394,395]. The combination of fluorination and other surface modification strategies, such as impregnation of co-catalysts [396], co-doping [397,398], construction of hierarchical mesoporous structures and heterojunctions, would be worth investigating in future studies.…”