Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 821, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.153410
Keywords
Ba-Sr M-hexaferrites; Methylene blue; Photo-Fenton-like system; Heterogeneous photo-catalysts; Degradation pathway
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Funding
- National Key Research and development Program of China [2017YFB0701900]
- Science Technology Commission of Shanghai Municipality [15DZ2260303, 16DZ2260602]
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Nano-compositing technologies are getting enhanced attention due to unique catalytic and separation activity with advanced characteristics for dye wastewater treatment. In this study, novel easily separable Ba-Sr based Al-Sm substituted M-hexaferrites (BASF-NPs) were fabricated as a highly effective heterogenous photo-Fenton-like catalysts via sol-gel route. The analytical techniques were applied to investigate BASF-NPs characteristics such as TGA, XRD, FTIR, XPS, SEM/TEM/EDS, UV-Vis, BET and VSM analysis. The results revealed that all fabricated BASF-NPs showed excellent photo-Fenton-like catalytic performance towards Methylene Blue (MB) degradation. Virtually complete degradation of an initial 10 mg/L MB was achieved under optimal conditions (i.e. 16 mM H2O2 and 0.25 g/L BASF-NPs) within 140 min of UV-irradiated reaction time and followed pseudo-first order reaction kinetic at the rate of 6.514 x 10(-2) min(-1). Similar degradation trend was noticed at various pH levels (pH 3-12), signifying the efficiency of the NPs at wide pH range. Due to the intrinsic magnetic nature of BASF-NPs, it was readily recoverable by external magnetic field and exposed strong capacity for dye removal treatment. The photo-catalysts retained its performance after four consecutive cycles, indicating robust reusability and excellent stability. (C) 2019 Elsevier B.V. All rights reserved.
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