A dual strategy for synthesizing carbon/defect comodified polymeric carbon nitride porous nanotubes with boosted photocatalytic hydrogen evolution and synchronous contaminant degradation

Single-atom cobalt-hydroxyl modification of polymeric carbon nitride for highly enhanced photocatalytic water oxidation: ball milling increased single atom loading

“…Three lifetimes (τ 1 -τ 3 ) and their mean lifetime (τ m , 89.2 ns) of BM-PCN are all much longer than those of PCN (τ m = 17.9 ns), further suggesting the faster charge transfer from the inside to the surface of ultrathin nanosheets in BM-PCN, decreasing the direct charge recombination efficiency, but with subsequent surface radiative recombination 60 . Interestingly, the τ 1 -τ 3 and τ m (10.8 ns) of BM-PCN/Co-c are much shorter than those of PCN, which should result from faster transfer of holes to E d that effectively decreases the charge recombination efficiency, with subsequent nonradiative energy transformation 61 . The Co−OH doping effect also makes PCN/Coc possesses shorter τ 1 -τ 3 and τ m (16.5 ns) than PCN.…”

“… 60 Interestingly, the τ 1 – τ 3 and τ m (10.8 ns) of BM-PCN/Co-c are much shorter than those of PCN, which should result from faster transfer of holes to E d that effectively decreases the charge recombination efficiency, with subsequent nonradiative energy transformation. 61 The Co–OH doping effect also makes PCN/Co-c exhibit shorter τ 1 – τ 3 and τ m (16.5 ns) than PCN. Fig.…”

Uracil-mediated supramolecular assembly for C-enriched porous carbon nitrides with enhanced photocatalytic hydrogen evolution

“…Higher pore volume and specific surface area provide more active sites for photocatalytic hydrogen production. 32…”

Au/g-C3N4 heterostructure sensitized by black phosphorus for full solar spectrum waste-to-hydrogen conversion

“…The photogenerated holes or •OH radicals are the main active substances in the degradation process of organic pollutants, and the organic pollutants can be a potential substitution of the traditional sacrificial agent in the hydrogen evolution reaction (HER). Simultaneous pollution degradation and hydrogen production can improve the energy efficiency and reduce the overall energy consumption [11][12][13][14][15][16][17][18]. Recently, several types of organic pollutants or antibiotics were used in photocatalytic hydrogen production reactions.…”

“…Chen's group [14] found that g-C 3 N 4 achieved the degradation of roxithromycin with improved photocatalytic efficiency of hydrogen production. Li and his coworkers [16] demonstrated carbon/carbon nitride porous nanotubes photocatalyst with high efficiency of water splitting and bisphenol A (BPA) degradation. Therefore, the development of hydrogen production technology from organic pollutant wastewater is a promising way to enhance the photocatalytic hydrogen production efficiency with low energy consumption.…”