Supramolecular electrostatic self-assembly of mesoporous thin-walled graphitic carbon nitride microtubes for highly efficient visible-light photocatalytic activities

Morphology and element doping effects: phosphorus-doped hollow polygonal g-C3N4 rods for visible light-driven CO2 reduction

“…Based on our results and previous reports, 45–47,53–55 a possible mechanism of P-HCNR promoted photocatalytic CO 2 reduction is postulated (see Fig. 1).…”

“…According to the literature studies, adding a metal atom/ion or complex to the semiconductor system is a useful strategy to improve the photoreduction efficiency and selectivity towards the reductive product by binding the reactant specifically and facilitating the charge transfer between the semiconductor and metal center, 48–50 among which Co is attractive with its high efficiency and selectivity to CO. 51–56 In particular, [Co(bpy) 3 ]Cl 2 is frequently used in photocatalytic CO 2 reduction due to its high selectivity to CO and excellent performance in facilitating the charge transfer between the semiconductor and metal complex. 53–55 In this context, we envisaged that combining the phosphorus-doped g-C 3 N 4 semiconductor with an earth abundant metal-based complex, i.e. [Co(bpy) 3 ]Cl 2 , will enhance the efficiency and CO selectivity in this study.…”

Porous Carbon Nitride Thin Strip: Precise Carbon Doping Regulating Delocalized π‐Electron Induces Elevated Photocatalytic Hydrogen Evolution

“…[31,32] For instance, polymerization of melamine and in situ generated cyanuric acid induced a hexagonal cylinder supramolecular self-assembly precursor and subsequently hexagonal tubular C 3 N 4 was obtained after thermal treatment of supramolecular. [33][34][35] Enlightened by this, molecule self-assembly strategy could bring specially shaped micro-nanomaterials. [36,37] 1D length-diameter ratio and quantum confinement effect are conducive to exposure of active sites, mass diffusion, directional charge transport, and inhibition of charge recombination, which endow carbon nitride materials with elevated catalyst efficiency.…”

Biomass porous carbon as the active site to enhance photodegradation of oxytetracycline on mesoporous g-C3N4

“…8(a), the PL emission intensity of BPC/g-C 3 N 4 composite was lower than that of pure g-C 3 N 4 exhibited, indicating that the BPC/g-C 3 N 4 composite had the higher photogenerated e À -h + pairs separation efficiency and excellent photocatalytic performance. 51 Therefore, the weak intensity indicated that the load of BPC increased the specic surface area and brought a positive effect on restraining the recombination of the photogenerated e À -h + pairs by trapping photo-excited electrons, 52,53 so that the lightexcited carriers could be transferred to the particle surface quickly, and then the carrier recombination was avoided. Besides, compare with pure g-C 3 N 4 , the PL peak of BPC(X%)/g-C 3 N 4 also showed a blue-ward shiing, it was further demonstrated that the band gap value of the composites has changed.…”