Self-assembled g-C3N4 nanoarchitectures with boosted photocatalytic solar-to-hydrogen efficiency
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Abstract
Abstract The solar-to‑hydrogen conversion via semiconductor-based photocatalytic water splitting has triggered the search for cost-effective, high-performance photocatalytic materials. Graphitic carbon nitride (g-C3N4) has proven to be a promising metal-free photocatalyst for the hydrogen evolution reaction (HER), however, bulk g-C3N4 suffers from limited HER efficiency owing to its disadvantages including fast electron-hole recombination, low conductivity and irregular microstructure. Herein, we report a supramolecular chemistry-based approach to construct g-C3N4 nano-architectures by calcining the pre-organized complexes originating from the copolymerization of two symmetrical precursors, melamine and trithiocyanuric acid. The resultant g-C3N4 micro-/nanostructures not only effectively induce enhanced visible light-harvesting property but also accelerate the electron-hole separation and charge carrier transfer, leading to highly improved HER performance. X-ray photoelectron spectroscopy (XPS) analysis confirms the chemical environment of different elements, while in-situ electron paramagnetic resonance (EPR) characterizations reveal the types of oxygen-containing radicals and charge carrier dynamics. Compared to pristine g-C3N4, the optimal large-aspect-ratio g-C3N4 sheets derived from ethanol show the fastest HER rate of 1144 μmol·h−1·g−1. The improvement of photocatalytic activity can be ascribed to synergistic effects of extended visible light absorption, boosted charge transfer and more active catalytic sites for HER in modified g-C3N4 materials.
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Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Perovskite Materials and Applications · 2D Materials and Applications
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References (56)
Show source-provided references
1. Metal-free disinfection effects induced by graphitic carbon nitride polymers under visible light illumination10.1039/c3cc48374f ↗
2. Combining heterojunction engineering with surface cocatalyst modification to synergistically enhance the photocatalytic hydrogen evolution performance of cadmium sulfide nanorods10.1021/acssuschemeng.7b01043 ↗
3. Photocatalytic water splitting using semiconductor particles: history and recent developments10.1016/j.jphotochemrev.2011.07.001 ↗
4. Doping of graphitic carbon nitride for photocatalysis: a review10.1016/j.apcatb.2017.06.003 ↗
5. Heterogeneous photocatalyst materials for water splitting10.1039/B800489G ↗
6. Ni(OH)2 modified CdS nanorods for highly efficient visible-light-driven photocatalytic H2 generation10.1039/c1gc15465f ↗
7. A metal-free polymeric photocatalyst for hydrogen production from water under visible light10.1038/nmat2317 ↗
8. Surface N modified 2D g-C3N4 nanosheets derived from DMF for photocatalytic H2 evolution10.1016/j.apsusc.2018.07.154 ↗
9. Amorphous molybdenum sulfide as highly efficient electron-cocatalyst for enhanced photocatalytic H2 evolution10.1016/j.apcatb.2016.04.028 ↗
10. Dependence of electronic structure of g-C3N4 on the layer number of its nanosheets: a study by Raman spectroscopy coupled with first-principles calculations10.1016/j.carbon.2014.08.059 ↗
11. Porous MoP network structure as co-catalyst for H2 evolution over g-C3N4 nanosheets10.1016/j.apsusc.2018.08.189 ↗
12. Noble-metal-free nickel phosphide modified CdS/C3N4 nanorods for dramatically enhanced photocatalytic hydrogen evolution under visible light irradiation10.1039/C7DT02929B ↗
13. Photocatalytic overall water splitting by conjugated semiconductors with crystalline poly(triazine imide) frameworks10.1039/C7SC00900C ↗
14. Unveiling the origin of boosted photocatalytic hydrogen evolution in simultaneously (S, P, O)-codoped and exfoliated ultrathin g-C3N4 nanosheets10.1016/j.apcatb.2019.02.020 ↗
15. Enhanced photocatalytic H2 evolution and phenol degradation over sulfur doped meso/macroporous g-C3N4 spheres with continuous channels10.1016/j.ijhydene.2018.10.124 ↗
16. In situ growth of sulfide/g-C3N4 nano-heterostructures with an adjusted band gap toward enhanced visible photocatalysis10.1039/C6CP06371C ↗
17. A simple fabrication for sulfur doped graphitic carbon nitride porous rods with excellent photocatalytic activity degrading RhB dye10.1016/j.apsusc.2016.04.055 ↗
18. N-doped graphitic carbon-incorporated g-C3N4 for remarkably enhanced photocatalytic H2 evolution under visible light10.1016/j.carbon.2015.12.008 ↗
19. Self-assembled synthesis of defect-engineered graphitic carbon nitride nanotubes for efficient conversion of solar energy10.1016/j.apcatb.2017.11.041 ↗
20. In situ self-transformation synthesis of g-C3N4-modified CdS heterostructure with enhanced photocatalytic activity10.1016/j.apsusc.2015.06.074 ↗
21. Self-assembled carbon nitride for photocatalytic hydrogen evolution and degradation of p-nitrophenol10.1016/j.apcatb.2016.12.030 ↗
22. Fabrication of modified g-C3N4 nanorod/Ag3PO4 nanocomposites for solar-driven photocatalytic oxygen evolution from water splitting10.1016/j.apsusc.2017.07.185 ↗
23. Synthesis of a carbon nitride structure for visible-light catalysis by copolymerization10.1002/anie.200903886 ↗
24. A facile synthesis of covalent carbon nitride photocatalysts by co-polymerization of urea and phenylurea for hydrogen evolution10.1016/j.jcat.2013.07.026 ↗
25. From melamine-cyanuric acid supramolecular aggregates to carbon nitride hollow spheres10.1002/adfm.201203732 ↗
26. Solar photocatalytic water oxidation over Ag3PO4/g-C3N4 composite materials mediated by metallic Ag and graphene10.1016/j.apsusc.2017.07.290 ↗
27. Tuning the morphology of g-C3N4 for improvement of Z-scheme photocatalytic water oxidation10.1021/acsami.5b02649 ↗
28. Fabrication of dual direct Z-scheme g-C3N4/MoS2/Ag3PO4 photocatalyst and its oxygen evolution performance10.1016/j.apsusc.2018.08.209 ↗
29. Silver phosphate/graphitic carbon nitride as an efficient photocatalytic tandem system for oxygen evolution10.1002/cssc.201403168 ↗
30. Non-metal photocatalyst nitrogen-doped carbon nanotubes modified mpg-C3N4: facile synthesis and the enhanced visible-light photocatalytic activity10.1016/j.jcis.2017.01.010 ↗
31. Synergistic effects of MoO2 nanosheets and graphene-like C3N4 for highly improved visible light photocatalytic activities10.1016/j.apsusc.2018.06.134 ↗
32. Robust photocatalytic hydrogen evolution over amorphous ruthenium phosphide quantum dots modified g-C3N4 nanosheet10.1016/j.apcatb.2018.08.048 ↗
33. Heteroatoms binary-doped hierarchical porous g-C3N4 nanobelts for remarkably enhanced visible-light-driven hydrogen evolution10.1016/j.apcatb.2017.12.045 ↗
34. Improving carbon nitride photocatalysis by supramolecular preorganization of monomers10.1021/ja402521s ↗
35. Photocatalytic activity enhanced via g-C3N4 nanoplates to nanorods10.1021/jp402062d ↗
36. Electronic structure of heterojunction MoO2/g-C3N4 catalyst for oxidative desulfurization10.1016/j.apcatb.2018.07.037 ↗
37. Polycondensation of thiourea into carbon nitride semiconductors as visible light photocatalysts10.1039/c2jm00097k ↗
38. Construction of conjugated carbon nitride nanoarchitectures in solution at low temperatures for photoredox catalysis10.1002/anie.201206534 ↗
39. Significantly enhanced photocatalytic hydrogen generation over graphitic carbon nitride with carefully modified intralayer structures10.1016/j.cej.2017.09.119 ↗
40. Constructing nitrogen doped graphene quantum dots-ZnNb2O6/g-C3N4 catalysts for hydrogen production under visible light10.1016/j.apcatb.2017.01.070 ↗
41. Making metal-carbon nitride heterojunctions for improved photocatalytic hydrogen evolution with visible light10.1002/cctc.201000057 ↗
42. Polymeric graphitic carbon nitride for heterogeneous photocatalysis10.1021/cs300240x ↗
43. A novel route combined precursor-hydrothermal pretreatment with microwave heating for preparing holey g-C3N4 nanosheets with high crystalline quality and extended visible light absorption10.1016/j.apcatb.2017.11.044 ↗
44. Shell-engineering of hollow g-C3N4 nanospheres via copolymerization for photocatalytic hydrogen evolution10.1039/C5CC03143E ↗
45. Efficiently enhancing the photocatalytic activity of g-C3N4 by a simple advanced successive activation method10.1049/mnl.2017.0518 ↗
46. Graphitic carbon nitride with S and O codoping for enhanced visible light photocatalytic performance10.1039/C7RA01036B ↗
47. G-C3N4-based photocatalysts for hydrogen generation10.1021/jz500546b ↗
48. Construction of high-dispersed Ag/Fe3O4/g-C3N4 photocatalyst by selective photo-deposition and improved photocatalytic activity10.1016/j.apcatb.2015.09.029 ↗
49. Enhanced visible-light-driven photocatalytic removal of NO: effect on layer distortion on g-C3N4 by H2 heating10.1016/j.apcatb.2015.05.010 ↗
50. An optimized and general synthetic strategy for fabrication of polymeric carbon nitride nanoarchitectures10.1002/adfm.201203287 ↗
51. Photogenerated charge carriers and reactive oxygen species in ZnO/Au hybrid nanostructures with enhanced photocatalytic and antibacterial activity10.1021/ja410800y ↗
52. High efficiency photocatalytic water splitting using 2D α-Fe2O3/g-C3N4 Z-scheme catalysts10.1002/aenm.201700025 ↗
53. Interfacial optimization of g-C3N4-based Z-scheme heterojunction toward synergistic enhancement of solar-driven photocatalytic oxygen evolution10.1016/j.apcatb.2018.11.056 ↗
54. Band structure engineering and efficient charge transport in oxygen substituted g-C3N4 for superior photocatalytic hydrogen evolution10.1016/j.apcatb.2018.02.038 ↗
55. In situ one-step hydrothermal synthesis of oxygen-containing groups-modified g-C3N4 for the improved photocatalytic H2 evolution performance10.1016/j.apsusc.2017.08.050 ↗
56. Facile synthesis of few-layer g-C3N4/ZnO composite photocatalyst for enhancing visible light photocatalytic performance of pollutants removal10.1016/j.colsurfa.2017.09.051 ↗