Visible Light-Driven Photocatalytic Degradation of 1,2,4-trichlorobenzene with Synthesized Co3O4 Photocatalyst
Bozhi Ren 1,2,3
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Hunan Provincial Key Laboratory of Shale Gas Resource Exploitation, Xiangtan, P.R. China
School of Civil Engineering, Hunan University of Science and Technology, Xiangtan, P.R. China
Key Laboratory of Theoretical Organic Chemistry and Functional Molecule, Ministry of Education, Xiangtan, P.R. China
School of Science and Sport, University of the West of Scotland, Paisley, United Kingdom
Bozhi Ren   

Hunan university of science and technology, Hunan university of science and technology, Xiangtan, Hunan, China, 411201 Xiangtan, China
Submission date: 2017-08-02
Final revision date: 2017-09-23
Acceptance date: 2017-09-24
Online publication date: 2018-04-13
Publication date: 2018-05-30
Pol. J. Environ. Stud. 2018;27(5):2285–2292
A cubic crystal form Co3O4 was synthesized using the sol-gel method and applied as catalyst in the visible light-driven photocatalytic degradation of 1,2,4-trichlorobenzene (1,2,,4-TCB). 1,2,4-TCB removal efficiency initially increased and was followed by a gentle decrease as the Co3O4 dosage increased, with the optimal dosage of 2.0 g/L. The degradation rate changed positively with light intensity and reaction temperature. However, pH exerted only a slight effect on 1,2,4-TCB degradation. Strong acidic and basic conditions were conducive to the photocatalytic degradation of 1,2,4-TCB. The optimal parameters for the photocatalytic degradation of 1,2,4-TCB were found at a Co3O4 dosage of 2.0 g/L, 350 W of illumination intensity, initial 1,2,4-TCB concentration of 7.5 mg/L at 30ºC, with 1,2,4-TCB removal efficiency of 90.13% after 6.0 hours photocatalytic degradation. The Co3O4 synthesized in the study with high-purity and stable properties guaranteed its high catalytic activity and stability. The possible mechanisms of visible light-driven photocatalytic degradation of 1,2,4-TCB with synthesized Co3O4 photocatalyst were also proposed.