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Surfactant-free synthesis of a novel octahedral ZnFe2O4/graphene composite with high adsorption and good photocatalytic activity for efficient treatment of dye wastewater
- Source :
- Ceramics International. 46:11786-11798
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- 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 (•OH), which are mainly responsible for the photodegradation of the organic contaminants.
- Subjects :
- 010302 applied physics
Materials science
Nanocomposite
Graphene
Process Chemistry and Technology
Cationic polymerization
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
law.invention
chemistry.chemical_compound
Adsorption
chemistry
Chemical engineering
law
0103 physical sciences
Materials Chemistry
Ceramics and Composites
Photocatalysis
0210 nano-technology
Bifunctional
Photodegradation
Methylene blue
Subjects
Details
- ISSN :
- 02728842
- Volume :
- 46
- Database :
- OpenAIRE
- Journal :
- Ceramics International
- Accession number :
- edsair.doi...........01dedfb96943523d6972ff84e70466f1