Abstract
AbstractPolymeric carbon nitride (PCN) is a promising class of materials for solar‐to‐chemical energy conversion. The increase of the photocatalytic activity of PCN is often achieved by the incorporation of heteroatoms, whose impact on the electronic structure of PCN remains poorly explored. This work reveals that the local electronic structure of PCN is strongly altered by doping with sulfur and iron using X‐ray absorption spectroscopy (XAS) and resonant inelastic X‐ray scattering (RIXS). From XAS at the carbon and nitrogen K‐edges, sulfur atoms are found to mostly affect carbon atoms, in contrast to iron doping mostly altering nitrogen sites. In RIXS at the nitrogen K‐edge, a vibrational progression, affected by iron doping, is evidenced, which is attributed to a vibronic coupling between excited electrons in nitrogen atoms and C–N stretching modes in PCN heterocycling rings. This work opens new perspectives for the characterization of vibronic coupling in polymeric photocatalysts.
Highlights
Polymeric carbon nitride (PCN) is a promising class of materials for solarand modification techniques is highly desirable to optimize PCN photocatalytic to-chemical energy conversion
The pristine and doped PCN samples were prepared according to previously reported methods, which are shortly described in the Experimental Section.[11,12]
The influence of doping with sulfur and iron atoms on PCN materials is investigated by soft X-ray spectroscopies
Summary
Polymeric carbon nitride (PCN) is a promising class of materials for solarand modification techniques is highly desirable to optimize PCN photocatalytic to-chemical energy conversion. The photocatalytic activities of pristine PCN materials conjugation can be modified by polymerizing with structureremain moderate because of the large optical bandgap, low matching organic comonomers. This provides another electric conductivity, and rapid rate of charge-carrier recombi- way to introduce heteroatoms into PCN matrix. Nation.[2] Optical, electronic, and chemical properties of PCN trithiocyanuric acid has a very similar structure than melamine materials can be influenced by its size, composition, and mor- (MA) that is a common precursor for PCN preparation and can phology.[1] the development of various synthetic methods be used to incorporate sulfur atoms into carbon nitrides.[12].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
