Enhanced spatially coupling heterojunction assembled from CuCo2S4 yolk-shell hollow sphere capsulated by Bi-modified TiO2 for highly efficient CO2 photoreduction

Engineering stable construction of MnCo2O4 yolk-in-double-shell amalgamated with bio-synthesized ZnMn2O4 nanoparticles for superior artificial CO2 reduction

“…Compared with YDSHS-MCO and 6-ZMO, the peak positions pertinent to (80)YDSHS-MCO@6-ZMO slightly shifted toward lower and higher binding energies, validating the acceptor and donor function of YDSHS-MCO and 6-ZMO, respectively. 27,35 In the case of 6-ZMO, the recorded HR-XPS spectrum related to Zn presented two single distinct peaks attributed to Zn 2p 3/2 and Zn 2p 1/2 at 1021.7 and 1044.7 eV, respectively, inferring the presence of Zn 2+ in the surface construction of the sample. 20 Compared with the pristine 6-ZMO, the slight positive-shift in the peaks for the binary (80)YDSHS-MCO@6-ZMO (by about 0.2 eV) confirmed the donor function of 6-ZMO in the heterostructure.…”

“…The isoelectric point was achieved at pH 3.5 and 7.0 for 6-ZMO and YDSHS-MCO, respectively, with the aid of the drift method. 27 Briefly, a certain amount of 6-ZMO was added to 100 mL of ultrapure water under ultra-sonication for 1 h, and then 0.2 g of YDSHS-MCO was added to the suspension with continued dispersion under sonication for another 1 h. The pH of the resulting suspension was fixed at 5, where the surface charge of 6-ZMO and YDSHS-MCO is negative and positive, respectively, and it was kept at boiling temperature for 30 min. Subsequently, the precipitate was collected, dried, pulverized, and transferred to a muffle furnace and heated under a nitrogen atmosphere for 2 h at 300 °C.…”

Effect of bismuth doping on the crystal structure and photocatalytic activity of titanium oxide

“…A high initial dye concentration caused many layers of adsorbed dye molecules to develop on the catalyst surface, which prevented light from coming into direct contact with the catalyst and producing hydroxyl radicals, thus slowing down the rate of degradation. 49–55…”

“…A high initial dye concentration caused many layers of adsorbed dye molecules to develop on the catalyst surface, which prevented light from coming into direct contact with the catalyst and producing hydroxyl radicals, thus slowing down the rate of degradation. [49][50][51][52][53][54][55] One of the key markers of a photocatalyst's usefulness and practical benets is its stability. 50,51 To assess the economic viability of the photocatalytic degradation process, the number of times the photocatalyst can be reused was obtained.…”

Recent Progress in Metal Oxide-Based Photocatalysts for CO2 Reduction to Solar Fuels: A Review

“…However, the self-oxidation of metal sulfides confuses researchers and limits their application. It can be alleviated by constructing a Z-scheme, and thus researchers introduced it to Bi-modified TiO 2 [ 56 ]. Meanwhile, a spatially coupled heterojunction was enhanced by regularly capsulated CuCo 2 S 4 yolk–shell hollow sphere.…”