首页|All-solid Z-scheme Bi/γ-Bi2O3/O-doped g-C3N4 heterojunction with Bi as electron shuttle for visible-light photocatalysis
All-solid Z-scheme Bi/γ-Bi2O3/O-doped g-C3N4 heterojunction with Bi as electron shuttle for visible-light photocatalysis
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NSTL
Elsevier
? 2022 Elsevier B.V.In order to broaden the spectral response range of graphitic carbon nitride (g-C3N4) and improve its visible-light catalytic activity, the method of ethanol-assisted solvo-thermal pretreatment and subsequent polymerization was used to prepare Bi/γ-Bi2O3 nanoparticles modified O-doped g-C3N4 (Bi/γ-Bi2O3/EtCN). During the polymerization of g-C3N4, oxygen doping brought about a richer pore structure, while ethanol and urea promoted the formation of sub-stable γ-Bi2O3, and most importantly, these reactions were achieved simultaneously to successfully fabricate the all-solid Z-scheme structure. The obtained Bi/γ-Bi2O3/EtCN showed much higher activity in the visible-light photocatalytic degradation of bisphenol A (BPA) than that of g-C3N4 and EtCN, where the degradation rate of 0.03Bi/γ-Bi2O3/EtCN was 15.67 times higher than that of g-C3N4, showing excellent visible photocatalytic performance. The improvement of the activity of Bi/γ-Bi2O3/EtCN mainly caused by the formation of all-solid Z-scheme heterojunction between γ-Bi2O3 and EtCN with Bi as the electron shuttle, which broadened the light absorption range of the catalyst, promoted the effective separation of electron-hole pairs. It was also found that ?O2? played a major role and h+ played a secondary role during BPA degradation process using 0.03Bi/γ-Bi2O3/EtCN as the photocatalyst, which confirmed the mechanism of Z-scheme heterojunction.
Key Laboratory of Jiangsu Province for Chemical Pollution Control and Resources Reuse School of Environmental and Biological Engineering Nanjing University of Science and Technology
School of Intellectual Property Nanjing University of Science and Technology
NSTL
Elsevier
