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Enhanced catalytic degradation of polyvinyl alcohol from aqueous solutions by novel synthesis of MnCoO3@γ-Al2O3 nanocomposites: Performance, degradation intermediates and mechanism
- Source :
- Journal of Molecular Liquids. 323:114569
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- In this study, MnCoO3@Al2O3 (MCA) was synthesized using a simple sol-gel method a4nd investigated as a catalyst for Polyvinyl alcohol (PVA) textiles degradation via hydrogen peroxide (H2O2) activation. The structures and properties of MCA were characterized using XRD, SEM, XPS, BJH and EDS. The optimum conditions of PVA degradation, such as MCA load, catalyst dosage, initial pH value and H2O2 concentration were explored. It was found that the removal rate of PVA under the conditions of 1000 mg/L MCA, initial pH = 3 and 2.934 ∗ 103 mM H2O2 reached 98.6%. The reusability of MCA catalyst was tested for 5 consecutive cycles. The intermediate degradation products of PVA were tested by GCMS, and the possible way of PVA degradation was suggested. Moreover, the existence of OH∙ was confirmed to be the main radicals through quenching experiment. Finally, the degradation pathways of PVA in the MCA/H2O2 system was proposed. In conclusion, this study put forward MCA as a heterogeneous catalyst to activate H2O2 for the degradation of PVA, which could be an excellent application in wastewater treatment.
- Subjects :
- Nanocomposite
Quenching (fluorescence)
Aqueous solution
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
Heterogeneous catalysis
01 natural sciences
Polyvinyl alcohol
Atomic and Molecular Physics, and Optics
0104 chemical sciences
Electronic, Optical and Magnetic Materials
Catalysis
chemistry.chemical_compound
chemistry
Chemical engineering
Materials Chemistry
Degradation (geology)
Physical and Theoretical Chemistry
0210 nano-technology
Hydrogen peroxide
Spectroscopy
Subjects
Details
- ISSN :
- 01677322
- Volume :
- 323
- Database :
- OpenAIRE
- Journal :
- Journal of Molecular Liquids
- Accession number :
- edsair.doi...........f1dadfe27da5616bc685fd26ee8ebc75