期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 272, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2020.118978
关键词
Z-scheme; Photocatalytic-Fenton; Hollow structure; Surface plasmon resonance; Photothermal effects
资金
- National Natural Science Foundation of China [21871078, 51672073]
- Natural Science Foundation of Heilongjiang Province [JQ2019B001, B2018010]
- Heilongjiang Postdoctoral Startup Fund [LBH-Q14135]
- Heilongjiang University Science Fund for Distinguished Young Scholars [JCL201802]
- Heilongjiang Provincial Institutions of Higher Learning Basic Research Funds Basic Research Projects [KJCX201909]
- Heilongjiang Touyan Innovation Team Program
Hollow Polyhedral superstructures can capture light effectively and have adjustable composite composition, which is useful for constructing Z-scheme systems. Here, rational design of hollow flower-like polyhedral alpha-Fe2O3/defective MoS2/Ag Z-Scheme heterojunctions is described, using polyhedral alpha-Fe2O3 as the template and via a one-pot hydrothermal and postdeposition strategy. The hollow flower-like polyhedral heterojunctions utilize multiple reflections of light in the hollow structure to achieve enhanced photocatalytic activity. Defective MoS2 acts as a link between alpha-Fe2O3 and Ag nanoparticles, providing a great deal of active sites and broadening the photoresponse region. Because of the enhancement of light absorption and surface plasma resonance of Ag, alpha-Fe2O3/defective MoS2/Ag has significant photothermal effect. The photogenerated carriers can be effectively separated by the construction of a Z-scheme system. Importantly, photocatalytic-Fenton degradation of 2,4-dichlorophenol and salicylic acid over hollow flower-like polyhedral alpha-Fe2O3/defective MoS2/Ag is higher than that of alpha-Fe2O3 and alpha-Fe2O3/defective MoS2.
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