TY - JOUR
T1 - Enhanced photocatalytic performances and magnetic recovery capacity of visible-light-driven Z-scheme ZnFe 2 O 4 /AgBr/Ag photocatalyst
AU - He, Jie
AU - Cheng, Yahui
AU - Wang, Tianzhao
AU - Feng, Deqiang
AU - Zheng, Lingcheng
AU - Shao, Dawei
AU - Wang, Weichao
AU - Wang, Weihua
AU - Lu, Feng
AU - Dong, Hong
AU - Zheng, Rongkun
AU - Liu, Hui
N1 - Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2018/5/15
Y1 - 2018/5/15
N2 - High efficiency, high stability and easy recovery are three key factors for practical photocatalysts. Z-scheme heterostructure is one of the most promising photocatalytic systems to meet all above requirements. However, efficient Z-scheme photocatalysts which could absorb visible light are still few and difficult to implement at present. In this work, the composite photocatalysts ZnFe 2 O 4 /AgBr/Ag were prepared through a two-step method. A ∼92% photodegradation rate on methyl orange was observed within 30 min under visible light, which is much better than that of individual ZnFe 2 O 4 or AgBr/Ag. The stability was also greatly improved compared with AgBr/Ag. The increased performance is resulted from the suitable band alignment of ZnFe 2 O 4 and AgBr, and it is defined as Z-scheme mechanism which was demonstrated by detecting active species and electrochemical impedance spectroscopy. Besides, ZnFe 2 O 4 /AgBr/Ag is ferromagnetic and can be recycled by magnet. These results show that ZnFe 2 O 4 /AgBr/Ag is a potential magnetically recyclable photocatalyst which can be driven by visible light.
AB - High efficiency, high stability and easy recovery are three key factors for practical photocatalysts. Z-scheme heterostructure is one of the most promising photocatalytic systems to meet all above requirements. However, efficient Z-scheme photocatalysts which could absorb visible light are still few and difficult to implement at present. In this work, the composite photocatalysts ZnFe 2 O 4 /AgBr/Ag were prepared through a two-step method. A ∼92% photodegradation rate on methyl orange was observed within 30 min under visible light, which is much better than that of individual ZnFe 2 O 4 or AgBr/Ag. The stability was also greatly improved compared with AgBr/Ag. The increased performance is resulted from the suitable band alignment of ZnFe 2 O 4 and AgBr, and it is defined as Z-scheme mechanism which was demonstrated by detecting active species and electrochemical impedance spectroscopy. Besides, ZnFe 2 O 4 /AgBr/Ag is ferromagnetic and can be recycled by magnet. These results show that ZnFe 2 O 4 /AgBr/Ag is a potential magnetically recyclable photocatalyst which can be driven by visible light.
KW - Magnetic recovery
KW - Photocatalytic stability
KW - Visible light photocatalysis
KW - Z-scheme
KW - ZnFe O /AgBr/Ag
UR - http://www.scopus.com/inward/record.url?scp=85041427702&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2017.12.219
DO - 10.1016/j.apsusc.2017.12.219
M3 - Article
AN - SCOPUS:85041427702
SN - 0169-4332
VL - 440
SP - 99
EP - 106
JO - Applied Surface Science
JF - Applied Surface Science
ER -