Journal
CERAMICS INTERNATIONAL
Volume 46, Issue 8, Pages 11786-11798Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2020.01.213
Keywords
Graphene; Octahedral ZnFe2O4; Adsorption behavior; Visible-light irradiation; Photocatalysis
Categories
Funding
- National Natural Science Foundation of China [51862009]
- Science and Technology Research Project of Jiangxi Education Department in 2019 [GJJ190585]
- Science and Technology Research Project of Jiangxi Education Department in 2018 [GJJ180608]
- School Youth Top Talent Program of JXSTNU [2018QNBJRC005]
- College Students' Innovation and Entrepreneurship Training Program of JXSTNU [201911318002, 20191304093]
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Recently, significant effort has been made toward the development of graphene-based visible-ligh-responsive photocatalysts and their application to dye wastewater treatment. Herein, a series of octahedral ZnFe2O4/graphene (ZnFe2O4-G) nanocomposites were synthesized using a one-pot solvothermal reaction without the need of a surfactant as novel bifunctional materials exhibiting both high adsorption and good visible-light-responsive photocatalyst properties. The crystal structure, morphology and photocatalytic degradation properties, as well as adsorption behavior, of the octahedral ZnFe2O4/graphene composites were investigated in detail. The adsorption capacity and UV-vis spectrometry results indicate that the dye removal efficiency over the samples followed the order of: methylene blue (MB) > rhodamine B (RhB) > methyl orange (MO). The ZnFe2O4-G materials exhited enhanced photocatalytic degradation properties for cationic dyes (MB and RhB) compared to those for the anionic dye (MO). In addition, the experimental results indicate that the ZnFe2O4-G materials can decompose H2O2 in the visible-light photocatalytic process to form hydroxyl radicals (center dot OH), which are mainly responsible for the photodegradation of the organic contaminants.
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