Prussian Blue Analogue-derived co/fe bimetallic nanoparticles immobilized on S/N-doped carbon sheet as a magnetic heterogeneous catalyst for activating peroxymonosulfate in water.
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) (Co3[Fe(CN)6]2) is employed as a precursor for preparing CF species embedded in N-doped carbon matrix and immobilized on S/N-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 (kapp = 0.230 min-1) than CF (kapp = 0.152 min-1) and SNC (kapp = 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 Ea 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.
['Li|Mei-Hsuan|MH|', 'Lin|Kun-Yi Andrew|KA|', 'Yang|Ming-Tong|MT|', 'Thanh|Bui Xuan|BX|', 'Tsang|Daniel C W|DCW|']
D002244:Carbon D002384:Catalysis D003035:Cobalt D005295:Ferrocyanides D060328:Magnetic Phenomena D008280:Magnetics D008670:Metals D008956:Models, Chemical D053758:Nanoparticles D010545:Peroxides D014867:Water D014874:Water Pollutants, Chemical
Advanced oxidation Cobalt-iron catalysts Metal-carbon composites Sulfate radicals Sulfur-nitrogen doping