Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 378, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2019.05.105
Keywords
Copper ferrite; Graphene oxide; Aerogel; Microwave-assisted Fenton reaction
Categories
Funding
- National Natural Science Foundation of China [21674028]
- University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province [UNPYSCT-2016075]
- Distinguished Youth Science Fundation of Heilongjiang University [JCL201703]
- Open Project of State Key Laboratory of Supramolecular Structure and Materials [Sklssm 2019029]
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Heterogeneous Fenton reaction is an attractive method for degradation of organic pollutants due to its high efficiency and non-selectivity and it also causes no secondary pollution. However low degradation rate and poor recyclability of the catalysts limit its applications for water purification. To overcome this herein copper ferrite/reduced graphene oxide (CF/rGO) aerogel was prepared by a one-step hydrothermal method as a highly efficient catalyst for the microwave-assisted Fenton reaction (MAFR). Under optimal conditions (500 W of microwave power 600 mu L of H2O2 15 mg of catalyst and 30 mg/L of RhB) the degradation efficiency of CF/rGO aerogel at 1.0 min (95.7%) was higher than that of reference samples at 3.0 min. Thermodynamical study showed the activation energy enthalpy change entropy change and Gibbs free energy change were 0.73 kJ/mol -49.5 kJ/mol -0.135 kJ/mol K and -6.8 kJ/mol respectively indicating that MAFR was an endothermic and non-spontaneous process.Radical trapping experiments showed that OH O-2(-) and h(+) played a combined role in RhB degradation. Besides high catalytic activity CF/rGO aerogel also displayed good reusability showing removal efficiency of 87.4% after 5 cycles. The high efficiency good reusability and simple process make CF/rGO aerogel a promising catalyst for wastewater treatment.
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