Efficient visible light photocatalytic degradation of 17α-ethinyl estradiol by a multifunctional Ag-AgCl/ZnFe2O4 magnetic nanocomposite

被引：67
作者：
Upreti, Akhanda Raj [1 ]
Li, Yi [1 ]
Khadgi, Nirina [1 ]
Naraginti, Saraschandra [1 ]
Zhang, Chi [1 ]
机构：
[1] Hohai Univ, Coll Environm, Minist Educ, Key Lab Integrated Regulat & Resource Dev Shallow, Xikang Rd 1, Nanjing 210098, Jiangsu, Peoples R China
来源：
RSC ADVANCES | 2016年 / 6卷 / 39期
基金：
中国国家自然科学基金;
关键词：
CHIRAL TIO2 NANOFIBERS; HYBRID PHOTOCATALYST; FACILE SYNTHESIS; WATER; PERFORMANCE; COMPOSITE; FERRITE; SUSPENSIONS; MECHANISM; AG/AGCL;
D O I：
10.1039/c6ra00707d
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The visible light active magnetic photocatalyst ZnFe2O4 was prepared via a facile hydrothermal and deposition-precipitation method using UV irradiation for photoreduction of Ag over AgCl for various durations. The Ag-AgCl/ZnFe2O4 nanocomposite (NC) showed efficient photocatalytic activity for the degradation of 17 alpha-ethinylestradiol (EE2), a recalcitrant endocrine disrupting compound. The pseudo rate constant (k ') of as-synthesized Ag-AgCl/ZnFe2O4 NC photo-reduced for 60 minutes was higher by a factor of 18.3 times compared to the ZnFe2O4 alone. In this Ag-AgCl/ZnFe2O4 NC, plasmon-excited Ag nanoparticles (NP) served as electron-transfer media, while ZnFe2O4 also participated in the charge transfer, besides serving as a support for Ag-AgCl. The electron transfer from ZnFe2O4 to Ag to AgCl in the Ag-AgCl/ZnFe2O4 NC enhances the interfacial charge transfer, and also contributes to the stability of the composite. Further, the composite can be magnetically separated for reuse. Hence, Ag-AgCl/ZnFe2O4 has a good potential in the field of environmental applications.
引用
收藏
页码：32761 / 32769
页数：9
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