Facile synthesis of ZnFe2O4@RGO nanocomposites towards photocatalytic ciprofloxacin degradation and H2 energy production

被引:96
作者
Behera, Arjun [1 ]
Kandi, Debasmita [1 ]
Mansingh, Sriram [1 ]
Martha, Satyabadi [1 ]
Parida, Kulamani [1 ]
机构
[1] Siksha O Anusandhan Deemed Univ, Inst Tech Educ & Res, Ctr Nano Sci & Nano Technol, Bhubaneswar 751030, India
关键词
ZFO@RGO nanocomposites; Ciprofloxacin degradation; Hydrogen energy production; CDS QDS; NORFLOXACIN DEGRADATION; GOLD NANOPARTICLES; GRAPHENE; OXIDE; HYBRID; HETEROJUNCTION; CONSTRUCTION; COMPOSITES; FERRITE;
D O I
10.1016/j.jcis.2019.08.109
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The production of Hydrogen energy through the splitting of water is a promising pathway for clean environment and sustainability. Herein we have synthesized a series of ZnFe2O4 (ZFO)@Reduced Graphene Oxide (RGO) nanocomposites by hydrothermal followed by calcination method and studied its application towards hydrogen energy production and ciprofloxacin degradation. Powder X-ray diffraction (XRD) study and X-ray photoelectron spectroscopy (XPS) analysis indicate the good crystallinity and suitable chemical environment for the photocatalytic process. Among all the samples, ZFO@3%RGO showed 73.4% of CIP degradation under solar irradiation of 1 h, which is 1.67 times higher than that of pure ZFO nanoparticles. CIP degradation process follows first order kinetics with a good rate constant of 0.021 min(-1) which is 2.3 times greater than ZFO. The photocatalyst ZFO@3%RGO illustrated maximum H-2 energy production i.e. 410.32 mu mol/h, which is 1.35 times more than that of neat ZFO nanoparticles. ZFO@3%RGO demonstrates the highest photocurrent density of 0.6 mA/cm(2) under light illuminations, which is 250 times superior to that of the pristine photocatalyst. Bode phase analysis confirmed that ZFO@RGO shows 13 times higher charge separation efficiency in comparison to neat ZFO. The best photocatalytic activity of ZFO@3%RGO nanocomposite is due to its high light absorption capacity, low photogenerated exciton recombination, high electron-hole separation, and high photocurrent density. (C) 2019 Elsevier Inc. All rights reserved.
引用
收藏
页码:667 / 679
页数:13
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