Microwave-Assisted High-Efficiency Degradation of Methyl Orange by using CuFe2O4/CNTs Catalysts and Insight into Degradation Mechanism

Abstract

Microwave-assisted catalytic oxidation technology has become an effective technology for rapid removal of organic pollutants in wastewater. In this research, the removal of methyl orange from aqueous solution by CuFe2O4 loaded on carbon nanotubes (CuFe2O4/CNTs) under microwave irradiation was studied. The effects of different loadings (1:2, 1:4, 1:8) of CuFe2O4 on the dielectric loss, magnetic loss, dielectric loss factor, magnetic loss factor and reflection loss of composite materials were studied. The results showed that the microwave adsorption performance was improved by loading CuFe2O4 on CNTs. These different composites were further characterized by SEM, FTIR and XRD techniques. In addition, this article also studied the effects of different microwave irradiation time, pH, and ionic factors on the degradation of methyl orange. In particular, the mechanism of methyl orange degradation by composite materials under different pH conditions was also studied in detail. The results show that the removal rate reaches 97.16% with 5 min under the best conditions, and the composite material has good anti-interference performance. This study may provide a new option to degrade organic dye in wastewater treating.

An analysis of the nutritional effects of Schisandra chinensis components based on mass spectrometry technology

“…This study provided a new alternative method for determining the monosaccharide components of natural polysaccharides (122). Liu et al (123) proposed a sample preparation method based on microwave assisted free radical degradation (MFRD) of plant polysaccharides to efficient degradation of S. chinensis and S. sphenanthera polysaccharides. HILIC-ESI-Q-TOF-MS and quadrupole-orbitrap-ion trap-tandem MS were used to characterize a series of oligosaccharides and small molecular weight polysaccharides after degradation.…”

“…HILIC-ESI-Q-TOF-MS and quadrupole-orbitrap-ion trap-tandem MS were used to characterize a series of oligosaccharides and small molecular weight polysaccharides after degradation. By using a high-performance anionexchange chromatography with pulsed amperometric detection (HPAEC-PAD) combined with MFRD, a low-polymerization compositional fingerprinting was successfully constructed for S. chinensis and S. sphenanthera in order to improve the quality assessment of S. chinensis (123). A novel, recyclable and green temperature-responsive deep eutectic solvent was applied to the simultaneous extraction and separation of different polar active phytochemicals from S. chinensis.…”