Controlled assemble of hollow heterostructured g-C3N4@CeO2 with rich oxygen vacancies for enhanced photocatalytic CO2 reduction

Designing a 0D/2D S‐Scheme Heterojunction over Polymeric Carbon Nitride for Visible‐Light Photocatalytic Inactivation of Bacteria

“…These experimental results reveal that the loading of CeO 2 QDs does not damage the basic framework structure of PCN. Additionally, the FTIR spectrum of pure CeO 2 presents an obvious peak below 500 cm −1 , which is commonly assigned to the vibration of metal–oxygen (Ce−O) bond . A small peak at this position can also be observed in the spectrum of the CeO 2 /PCN composite, suggesting the successful loading of CeO 2 , which is consistent with the afore‐mentioned discussion.…”

“…As expected, a large number of tiny CeO 2 particles are uniformly dispersed on the surface of the PCN nanosheets (Figure b). The high‐resolution TEM (HRTEM) image (inset, Figure b) shows that the measured lattice fringe space of CeO 2 NPs is 0.316 nm, which is assigned to its (111) plane . High‐angle annular dark field transmission electron microscopic (HAADF‐TEM) images confirm that these tiny CeO 2 nanocrystallines are homogeneously anchored on the PCN nanosheets (Figure c,d; Supporting Information, Figure S3).…”

“…The binding energies of the latter two N atoms in CeO 2 /PCN composite are higher (N−(C) 3 : 399.9 eV; C=N−C: 398.5 eV) than pristine PCN without illumination but lower (N−(C) 3 : 399.5 eV; C=N−C: 398.1 eV) under illumination, suggesting that these N elements actually act as the electron donor in the absence of illumination but electron acceptor under illumination. Additionally, the high‐resolution Ce XPS spectra of pure CeO 2 can be fitted into several peaks at 881.9, 886.3, 900.2, and 904.8 eV, which can be assigned to the V, V′, V′′′, and U′ states of Ce elements, respectively . Figure c shows that after the formation of close contact between CeO 2 and PCN in darkness, the binding energies (V 881.5 eV, V′ 885.8 eV, V′′′ 899.8 eV, U′ 904.3 eV) of Ce atoms in the CeO 2 /PCN composite decrease compared to the pure CeO 2 , revealing that it is the electron acceptor in the absence of illumination.…”

Heterostructured Catalysts for Electrocatalytic and Photocatalytic Carbon Dioxide Reduction

“…Despite the tremendous potential of g‐C 3 N 4 , poor photocatalytic performances are evident largely attributed to rapid recombination rates of photoinduced charge carriers and limited photon absorption across the visible light spectrum. [ 104–106 ]…”

Enhancement of Visible‐Light Photocatalytic Hydrogen Production by CeCO3OH in g‐C3N4/CeO2 System

“…CeO 2 and g‐C 3 N 4 may form heterojunction because of their well‐matched band structures. The g‐C 3 N 4 /CeO 2 composites have been prepared to improve photocatalytic ability in organic pollutant degradation reactions and CO 2 photoreduction reactions ,. But there are few attempts on the application of the composite in hydrogen production.…”