Selective reduction of Cu2+ with simultaneous degradation of tetracycline by the dual channels ion imprinted POPD-CoFe2O4 heterojunction photocatalyst

被引:129
作者
He, Fan [1 ]
Lu, Ziyang [1 ]
Song, Minshan [2 ]
Liu, Xinlin [3 ]
Tang, Hua [4 ]
Huo, Pengwei [5 ]
Fan, Weiqiang [5 ]
Dong, Hongjun [5 ]
Wu, Xiangyang [1 ]
Han, Song [1 ]
机构
[1] Jiangsu Univ, Inst Environm Hlth & Ecol Secur, Sch Environm & Safety Engn, Zhenjiang 212013, Jiangsu, Peoples R China
[2] Jiangsu Univ Sci & Technol, Sch Sci, Zhenjiang 212003, Jiangsu, Peoples R China
[3] Jiangsu Univ, Sch Energy & Power Engn, Zhenjiang 212013, Jiangsu, Peoples R China
[4] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Jiangsu, Peoples R China
[5] Jiangsu Univ, Sch Chem & Chem Engn, Zhenjiang 212013, Jiangsu, Peoples R China
基金
中国国家自然科学基金; 中国博士后科学基金;
关键词
Ion imprinting technique; POPD-CoFe2O4 heterojunction photocatalyst; Dual channels; Selective Cu2+ reduction; Simultaneous tetracycline degradation; Z-SCHEME PHOTOCATALYST; HETEROGENEOUS CATALYST; ORIENTED RECOGNITION; EFFICIENT REMOVAL; WASTE-WATER; METAL-ION; ADSORPTION; CARBON; PHOTODEGRADATION; PERFORMANCE;
D O I
10.1016/j.cej.2018.12.034
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The dual channels ion imprinted POPD-CoFe2O4 heterojunction photocatalyst (magnetic ion imprinted heterojunction photocatalyst) was synthesized by utilizing the microwave-assisted ion imprinting technique. The asprepared photocatalyst can selectively reduce Cu2+ owing to abundant Cu2+ imprinted cavities existed in the imprinted layer and Cu2+ was rapidly reduced by e-in POPD, the ions selectivity coefficient (k(ions)) of Cu2+ to other ions over magnetic ion imprinted heterojunction photocatalyst was 11.495 (k(ions) (2+2+)((Cu/Cd))), 4.716 (k(ions) (3+)((Cu/Fe)) and 15.910 (k(ions) (2+2+)((Cu/Zn)), respectively, and the materials selectivity coefficient (k(materials)) of magnetic ion imprinted heterojunction photocatalyst relative to other materials was 4.998, 2.545, 10.474 and 4.918, respectively, both showed excellent selectivity. Furthermore, with the existence of mesoporous in the imprinted layer, tetracycline can easily contact with CoFe2O4 and further be degraded by h(+) in CoFe2O4. Consequently, selective reduction of Cu2+ and simultaneous degradation of tetracycline can be realized via the dual channels of imprinted cavity and mesoporous. More importantly, the heterojunction structure formed between CoFe2O4 and POPD effectively separated e(-) and h(+), which greatly promoted the photocatalytic activity of selective reduction of Cu2+ and simultaneous degradation of tetracycline. With an enhanced stability for recyling, this work provided a high-efficient and economic technical approach for selective reduction of specific heavy metal ions and simultaneous degradation of organic contaminant in complex water environment.
引用
收藏
页码:750 / 761
页数:12
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