Journal
CARBOHYDRATE POLYMERS
Volume 255, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2020.117343
Keywords
g-C3N4; Cellulose nanocrystal; Z-scheme heterojunction; Photocatalyst; Hydrothermal impregnation
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Funding
- National Natural Science Foundation of China [32071720]
- Key Technology Research and Development Program of Tianjin from Tianjin Municipal Science and Technology [19YFZCSN00950]
- Young Elite Scientists Sponsorship Program by Tianjin [TJSQNTJ-2017-19]
- [AWS18J004]
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This study successfully fabricated a C-doped g-C3N4/WO3 heterojunction photocatalyst through hydrothermal impregnation, high-temperature calcination, and electrostatic self-assembly, which exhibited narrower band-gap, enhanced visible-light absorption, and improved photocatalytic performance.
The preparation of heteroatom doping heterojunction photocatalysts with nontoxic carbonaceous materials and simple method still remains a challenge. Herein, ternary Z-scheme C-doped graphitic carbon nitride/tungsten oxide (C-doped g-C3N4/WO3) was successfully fabricated via the hydrothermal impregnation with cellulose nanocrystal, high-temperature calcination, and electrostatic self-assembly with WO3 nanocuboids in turns. Benefiting from the porous structure, high specific areas (57.20 m(2) g(-1)), C-substitution, and the formation of Z-scheme heterojunction, the resulting photocatalyst exhibited narrower band-gap, enhanced visible-light absorption and separation of charge carrier, faster interfacial charge transfer, good oxidation/reduction capacities, and thus improved the photocatalytic activity performance. As such, this investigation will provide an effective route for not only incorporating semiconductors and heteroatoms into g-C3N4 but also developing more heterojunction with markedly improved photocatalytic performance.
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