Donor-Acceptor structural polymeric carbon nitride with in-plane electric field accelerating charge separation for efficient photocatalytic hydrogen evolution

Carbon Nitrides with Grafted Dual-Functional Ligands as Electron Acceptors and Active Sites for Ultra-stable Photocatalytic H2O2 Production

“…Photocatalytic production of H 2 O 2 from earth-abundant water and oxygen via a two-electron oxygen reduction is a greener alternative route toward a sustainable future . CNs have drawn great attention as photocatalysts due to their low cost, high chemical stability, and proper band structure . Additionally, it is a potential oxygen reduction reaction (ORR) catalyst thanks to the high level of pyridine-like nitrogen, which has been demonstrated to promote the ORR. , Taking advantage of the above intrinsic merits, CNs have been viewed as a promising photocatalyst for H 2 O 2 production.…”

Tailoring a sulfur doped carbon nitride skeleton to enhance the photocatalytic hydrogen evolution activity

“…32 The signal at 163.8 eV is assigned to the C-S bond, and another peak at approximately 168.0 eV was divided into three signals of 167.6, 168.0, and 169.3 eV, which results from the oxidation of different S species under the semi-closed conditions during the thermal polymerization of urea and dithizone. 33 The above analysis indicated that using the thermal polymerization of dithizone with urea, Sdoped CN was successfully prepared.…”

Graphitic Carbon Nitride Modified with 2-Aminothiophene-3-Carbonitrile to Boost Molecular Dipole and n → π* Electronic Transition for Photoreduction of Carbon Dioxide

“…5−8 On account of the highly symmetrical structure of g-CN, photoexcited electrons are easily imprisoned in the relatively independent π electron ring of the heptazine structure, which is not conducive to the efficient transfer of photogenerated carriers. 9,10 Compared to other strategies, the use of a donor−acceptor (D−A) structure formed by copolymerization of trace amounts of small molecules with urea or melamine has been proven to be an effective method for enhancing the photocatalytic efficiency. This is achieved by facilitating charge separation and extending light absorption.…”

“…Unfortunately, the photocatalytic efficiency of g-CN needs further optimization due to its limited response to visible light (no more than 460 nm) and the fast recombination of photogenerated electron–hole pairs . Various strategies have been proposed to modulate the structural and electronic properties of g-CN, including element doping, heterojunction construction, and molecular structural engineering. − On account of the highly symmetrical structure of g-CN, photoexcited electrons are easily imprisoned in the relatively independent π electron ring of the heptazine structure, which is not conducive to the efficient transfer of photogenerated carriers. , Compared to other strategies, the use of a donor–acceptor (D–A) structure formed by copolymerization of trace amounts of small molecules with urea or melamine has been proven to be an effective method for enhancing the photocatalytic efficiency. This is achieved by facilitating charge separation and extending light absorption. − According to previous research, electron interactions in the D–A system led to uneven spatial distribution of charge density in the π–π conjugated system .…”