Microwave hydrothermal synthesis of Bi2Fe4O9 crystals with visible light photocatalytic activity

被引:28
|
作者
Liu, ZhangSheng [1 ]
Wu, BianTao [2 ]
Zhu, YaBo [1 ]
机构
[1] China Univ Min & Technol, Sch Mat Sci & Engn, Xuzhou 221116, Peoples R China
[2] China Univ Min & Technol, Sch Informat & Elect Engn, Xuzhou 221116, Peoples R China
关键词
Chemical synthesis; Bismuth ferrite; Microwave hydrothermal; Nucleation; Photocatalytic activity; SEMICONDUCTOR; NANOCRYSTALS; TIO2; SUSPENSIONS;
D O I
10.1016/j.matchemphys.2012.05.010
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Bi2Fe4O9 crystals were successfully prepared via a rapid and facile microwave hydrothermal (MH) process. The influences of the various preparation parameters (including the NaOH concentration, and holding time) on the phase formation and morphology development were investigated in detail. XRD results showed that Bi2Fe4O9 crystal was formed indirectly with an intermediate phase of Bi25FeO40 in the MH process, whose further formation mechanism was discussed based on the morphology development. Moreover, the photocatalytic efficiencies of Bi2Fe4O9 products obtained at the different holding times were evaluated by the degradation of methyl orange under visible light irradiation. It was found that the photocatalytic activities were greatly dependent on the holding time. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:474 / 478
页数:5
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