Hollow flower-like polyhedral α-Fe2O3/Defective MoS2/Ag Z-scheme heterojunctions with enhanced photocatalytic-Fenton performance via surface plasmon resonance and photothermal effects

被引：123
|
作者：
Guo, Meijun [1 ]
Xing, Zipeng [1 ]
Zhao, Tianyu [1 ]
Qiu, Yalu [1 ]
Tao, Bing [3 ]
Li, Zhenzi [2 ]
Zhou, Wei [1 ,2 ]
机构：
[1] Heilongjiang Univ, Sch Chem & Mat Sci, Dept Environm Sci, Key Lab Funct Inorgan Mat Chem,Minist Educ People, Harbin 150080, Peoples R China
[2] Qilu Univ Technol, Sch Chem & Pharmaceut Engn, Shandong Prov Key Lab Mol Engn, Shandong Acad Sci, Jinan 250353, Shandong, Peoples R China
[3] Univ Southampton, Fac Engn & Phys Sci, Sch Engn, Southampton SO17 1BJ, Hants, England
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2020年 / 272卷
基金：
中国国家自然科学基金;
关键词：
Z-scheme; Photocatalytic-Fenton; Hollow structure; Surface plasmon resonance; Photothermal effects; ACTIVE EDGE SITES; VISIBLE-LIGHT; ULTRATHIN NANOSHEETS; H-2; EVOLUTION; COMPOSITES; NANOSTRUCTURES; DEGRADATION; CONVERSION; NITROGEN; REMOVAL;
D O I：
10.1016/j.apcatb.2020.118978
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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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页数：9
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