首页|Constructing core@shell structured photothermal nanosphere with thin carbon layer confined Co-Mn bimetals for pollutant degradation and solar interfacial water evaporation
Constructing core@shell structured photothermal nanosphere with thin carbon layer confined Co-Mn bimetals for pollutant degradation and solar interfacial water evaporation
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Photothermal material applied in environmental governance has attracted growing attention.By combining the Stöber method and dopamine-triggered coating strat-egy,Co-Mn precursor was in situ incorporated into the polydopamine(PDA)layer over the surface of silica cores.Afterwards,a unique photothermal nanosphere with SiO2 core and thin carbon layer and dual Co-Mn oxides shell was allowed to form by sequential heat treatment in the inert atmosphere(SiO2@CoMn/C).The bimetallic fraction of Co/Mn in the carbon layer and post-treatment calcina-tion temperature was comprehensively tuned to optimize the peroxymonosulfate(PMS)activation performance of the catalyst.The state of bimetallic species was studied including their physical distribution,chemical valence,and interplay by various characterizations.Impressively,Co oxides appear as dominant monodispersed nanoparticles(～10 nm),while Mn with cluster-like morphology is observed to uniformly distribute over thin-layer carbon and adhered to the surface of SiO2 nanospheres(～250 nm).The calcined temperature could tune the oxidized state of Co species,leading to the optimization of the catalytic performance of introduced dual metal species.As a result,this obtained optimal catalyst integrated the advantages of exposed bimetallic CoMn species and N-doped thin carbon to deliver excellent catalytic PMS activation performance and photothermal synergetic catalytic mineralization abil-ity for diversiform pollutants.Further reactions condition controls and anion interference studies were conducted to identify the adaptability of the optimal catalyst.Moreover,the application of solar-driven interfacial water evaporation using optimal SiO2@Co3Mn1/C-600 catalyst was explored,showing a high water evaporation rate of 1.48 kg·m-2·h-1 and an efficiency of 95.2％,further revealing a compre-hensive governance functionality of obtained material in the complex pollution condition.
PhotothermalPeroxymonosulfate(PMS)activationBimetallic synergyWater evaporationAdvanced oxidation process
School of Environmental and Chemical Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China
School of Chemistry and Chemical Engineering,Liaocheng University,Liaocheng 252000,China
School of Material Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China
School of Environmental Science and Engineering,Nanjing Tech University,Nanjing 210009,China
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China National Natural Science FoundationChina Postdoctoral Science FoundationJiangsu Provincial Founds for the Young ScholarsInstrumental Analysis Center,Jiangsu University of Science and Technology
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