Research Progress of Zinc Ferrite as Photocatalyst
Guiqin HOU1,2(),Yunkai LI1,Xiaoyan WANG2
1 School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081 2 Qing Gong College, North China University of Science and Technology, Tangshan 063000
Zinc ferrite is a n-type semiconductor with high photocatalytic activity and visible light sensitive, the unique magnetic properties and chemical stability make it widely used in the field of photocatalysis. For various morphology of zinc ferrite, different modification methods can be taken to make it more efficient and practical. In recent years, taking advantage of the zinc ferrite characteristics, the preparation of magnetic recovery and stable performance of the composite photocatalyst has attracted the attention of researchers. In this paper, the basic properties of zinc ferrite as photocatalyst and the preparation methods of various morphology are introduced. The modification technology and modification mechanism of zinc ferrite in photocatalysis are discussed. At the same time, the existing problems and prospects are pointed out.
100 mg, diameters of 100— 200 nm and lengths of several micrometers
100 mL, 5 mg/L MB
Sunlight,April, 10∶00—16∶00
85%
Floriated
Mild hydrothermal and calcination processes by using CTABr as a template-directing reagent
100 mg, average length of 122 nm and diameter of 29 nm
80 mL water and 20 mL methanol
250 W, Xe lamp, 5 h
237.87(mmol·g)/L
Flaky
Mild hydrothermal and calcination processes
100 mg
80 mL water and 20 mL methanol
250 W, Xe lamp, 5 h
87.40(mmol·g)/L
Nanotube
Anodic aluminum oxide templates from sol-gel solution
Average diameter of approximately 200 nm
100 mL, 10 mg/L, 4-CP
500 W, Xe lamp, 6 h
100%
表1 不同形貌铁酸锌的制备方法及其光催化活性
图8 光照作用下不同半导体光催化剂之间的复合示意图
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