期刊
CHEMOSPHERE
卷 244, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2019.125444
关键词
Advanced oxidation; Sulfate radicals; Metal-carbon composites; Cobalt-iron catalysts; Sulfur-nitrogen doping
资金
- Ministry of Science and Technology (MOST), Taiwan [108-2636-E-005-001-]
- Innovation and Development Center of Sustainable Agriculture from The Featured Areas Research Center Program within Ministry of Education (MOE), Taiwan
While Co is the most effective metal for activating PMS, extensive efforts are made to develop Co/Fe species (CF) (e.g., CoFe2O4) for imparting magnetic properties and facilitating recovery of catalysts. When carbon substrates are doped with heteroatoms (e.g., S and N) and CF is embedded within the heteroatom-doped carbon matrix, synergies can occur to boost catalytic activities. This study proposes an alternative CF-bearing carbonaceous composite, a cobalt-containing Prussian Blue Analogue (PBA) (Co-3[Fe(CN)(6)](2)) is employed as a precursor for preparing CF species embedded in N-doped carbon matrix and immobilized on SAN-co-doped carbon (SNC). Specifically, PBA in-situ grows on SNC by a heat treatment of trithiocyanuric acid to form PBA@SNC, which is then carbonized into CF species@SNC (CF@SNC). By adopting Amaranth degradation as a model reaction, CF@SNC shows a higher catalytic activity (k(app) = 0.230 min(-1)) than CF (k(app) = 0.152 min(-1)) and SNC (k(app) = 0.016 min(-1)) for activating PMS. In comparison with Co3O4, CF@SNC exhibits a higher catalytic activity for PMS activation. CF@SNC renders a relatively low E-a value (53 kJ/mol) for Amaranth degradation in comparison to other reported catalysts. These comparisons demonstrate the advantageous features of CF@SNC as a magnetic and efficient catalyst for PMS activation. (C) 2019 Published by Elsevier Ltd.
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