Magnetic cobalt ferrite/reduced graphene oxide (CF/rGO) porous balls for efficient photocatalytic degradation of oxytetracycline

Wang，Jingzhen1; Zang，Linlin2; Wang，Libin1; Tian，Yutong1; Yang，Zhiyu1; Yue，Yumei1; Sun，Liguo1

2022-10-01

10.1016/j.jece.2022.108259

Journal of Environmental Chemical Engineering   Impact Factor & Quartile

2213-2929

2213-3437

Photocatalytic degradation is an effective technique for removing antibiotics from contaminated water. The kernel of photocatalytic degradation lies in the design and preparation of high-performance and recyclable catalysts. Herein, magnetic porous cobalt ferrite/reduced graphene oxide (CF/rGO) balls were prepared by calcination of spherical composites obtained via modified microfluidic method for effective photocatalytic degradation of oxytetracycline (OTC). The strong interfacial interaction between rGO and cobalt ferrite nano-particles in porous balls enhanced electron transfer, charge separation and light absorption. Porous spherical structure was favorable for light harvesting. The catalyst could rapidly and efficiently absorb OTC. These characteristics were beneficial to the enhancement of photocatalytic efficiency. The optimized sample (CF/rGO-0.2) exhibited an excellent apparent rate constant (0.0410 min(-1)) for OTC degradation under visible light irradiation, which was 3.73 times that of CF/rGO-0 (0.0110 min(-1)). CF/rGO-0.2 had excellent stability in cycle experiments and could be quickly recovered by magnets. The trapping experiments showed that hole (h(+)) and superoxide radicals (center dot O-2(-)) acted an extremely important role in degradation of OTC, thus suggesting a possible photocatalytic reaction mechanism. This work provides a potential photocatalyst for antibiotic removal from water.

rGO Cobalt ferrite Magnetic ball Photocatalytic degradation Oxytetracycline

SCI ; EI

English

Others

National Natural Science Foundation of China, China[51973051] ; Heilongjiang Natural Science Foundation Project, China[LH2019E077] ; Innovation Training Program for College Students of China, China[202110212066]

Engineering

Engineering, Environmental ; Engineering, Chemical

WOS:000831651400002

ELSEVIER SCI LTD

20223112463634

Catalysts ; Cobalt compounds ; Ferrite ; Free radical reactions ; Light ; Light absorption ; Magnetism ; Photocatalytic activity ; Rate constants ; Water pollution

Water Pollution:453 ; Metallography:531.2 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Light/Optics:741.1 ; Nanotechnology:761 ; Physical Chemistry:801.4 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804

2-s2.0-85135060740

Web of Science

1.School of Chemical Engineering and Materials,Heilongjiang University,Harbin,150080,China
2.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Wang，Jingzhen,Zang，Linlin,Wang，Libin,et al. Magnetic cobalt ferrite/reduced graphene oxide (CF/rGO) porous balls for efficient photocatalytic degradation of oxytetracycline[J]. Journal of Environmental Chemical Engineering,2022,10(5).

Wang，Jingzhen.,Zang，Linlin.,Wang，Libin.,Tian，Yutong.,Yang，Zhiyu.,...&Sun，Liguo.(2022).Magnetic cobalt ferrite/reduced graphene oxide (CF/rGO) porous balls for efficient photocatalytic degradation of oxytetracycline.Journal of Environmental Chemical Engineering,10(5).

Wang，Jingzhen,et al."Magnetic cobalt ferrite/reduced graphene oxide (CF/rGO) porous balls for efficient photocatalytic degradation of oxytetracycline".Journal of Environmental Chemical Engineering 10.5(2022).