A novel 2D/1D core-shell heterostructures coupling MOF-derived iron oxides with ZnIn2S4 for enhanced photocatalytic activity

被引：130
作者：
Liang, Qian [1 ]
Gao, Wen [1 ]
Liu, Changhai [2 ]
Xu, Song [1 ]
Li, Zhongyu [1 ]
机构：
[1] Changzhou Univ, Sch Petrochem Engn, Changzhou 213164, Jiangsu, Peoples R China
[2] Changzhou Univ, Jiangsu Collaborat Innovat Ctr Photovolat Sci & E, Sch Mat Sci & Engn, Changzhou 213164, Jiangsu, Peoples R China
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2020年 / 392卷
基金：
中国国家自然科学基金;
关键词：
Metal organic framework; Pyrolysis; Core-shell; Photocatalysis; METAL-ORGANIC FRAMEWORKS; HYDROGEN-PRODUCTION; CHARGE SEPARATION; HOLLOW SPHERES; EFFICIENT; CARBON; NANOPARTICLES; MECHANISM; EVOLUTION; NANOCOMPOSITES;
D O I：
10.1016/j.jhazmat.2020.122500
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
1D spindle-like iron oxides with controllable phase were synthesized by using MIL-88A-templated pyrolysis under different atmospheres, thermal annealing in N-2 to obtain Fe3O4 and in air to obtain alpha-Fe2O3. Then, 2D/1D core-shell heterostructures (ZnIn2S4@Fe3O4 and ZnIn2S4@alpha-Fe2O3) were constructed by in-situ self-assembly strategy. Characterizations indicated that the 2D ultra-thin ZnIn2S4 shell with 0.3 mu m was homogeneously coated on the surface of 1D Fe3O4/alpha-Fe2O3 core with 1 and ZnIn2S4@Fe3O4 exhibited higher BET surface area (84.5 m(2) g(-1)) compared with ZnIn2S4@alpha-Fe2O3 (17.8 m(2) g(-1)), providing more exposed active sites and larger contact area. The ZnIn2S4@Fe3O4-5 showed the best photocatalytic activity of RhB degradation as compared to ZnIn2S4, Fe3O4 and ZnIn2S4@alpha-Fe2O3. In addition, the degradation rates of MB, BPA and MO over ZnIn2S4@Fe3O4 were much higher than that of ZnIn2S4@alpha-Fe2O3. The proposed photocatalytic mechanism was also discussed: the Fe3O4 as an electron acceptor caused Fe3+/Fe2+ cycle in ZnIn2S4@Fe3O4 and ZnIn2S4@alpha-Fe2O3 followed the Z-scheme mechanism.
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页数：12
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