Defective graphitic carbon nitride synthesized by controllable co-polymerization with enhanced visible light photocatalytic hydrogen evolution

Abstract

Schematic illustration of modified g-C3N4for visible-light photocatalytic water splitting to hydrogen. The CN-DPT shows remarkably enhanced hydrogen evolution performance.

Sphere‐and‐Flake‐Structured Cu, N Co‐Doped Carbon Catalyst Designed by a Template‐Free Method for Robust Oxygen Reduction Reaction

“…It can be proved from the XRD pattern in Figure S3, the peaks located at 12.4°, 13.6°, 22.0°, 25.2°, 27.2° is consistent with the reported XRD pattern of as‐synthesized melem . According to previous researches, melamine derivations with a complex substituent group can take a cocondensation reaction with melamine under heating conditions ,. In this work, the copolymer can be regarded as a melamine derivation with a complex substituent group, which is cocondensation with free melamine under heating process (inset in Figure ).…”

CO2‐Assisted Fabrication of Defect‐Engineered Carbon Nitride for Enhanced Electrocatalytic Hydrogen Evolution

“…[8] As observed in high-resolution N 1s spectrum (Figure 2c), both g-C 3 N 4 samples show three peaks at around 398.7 eV, 400.2 eV and 401.3 eV, corresponding to bicoordinated (CÀ N=C, N 2C ) and tricoordinated (NÀ [C] , N 3C ) nitrogen atoms and amino groups (NÀ H x , x = 1, 2), respectively. [12,16] Noticeably, the ratio of N 2C /N 3C decreases drastically from 4.9 (CN) to 2.6 (DCN), evidencing that nitrogen defects are preferentially engineered at N 2C . Meanwhile, the binding energies at 404.2 eV are attributed to charging effects.…”

Carbon-based nanomaterials: in the quest of alternative metal-free photocatalysts for solar water splitting

“…Alternatively, defect domains and specied disorders in g-C 3 N 4 can also help to enhance the overall charge transfer process, which eventually enhances the photocatalytic water splitting efficiency. 51,52 More specically, defects related to the nitrogen vacancies in the aromatic domain of g-C 3 N 4 can increase the photocatalytic efficiency. Nitrogen vacancies can modify the active sites on the surface for free carrier accumulation and also tune the bandgap, as well as the overall optoelectronic properties of g-C 3 N 4 .…”