Microwave-driven Catalytic Oxidation Of 3D Porous Cu/Ni/Co@carbon Composites In The Degradation Of Organic Contaminants

The organic pollutants to aquatic environment have cause great threat to the health and survival of human.Therefore,it is necessary to purification of organic wastewater.The technology that catalytic degradation derived of microwave become the emerging technology treating organic wastewater,due to its characteristics of fast catalytic rate,high salinity and can deal with pollutants that biological refractory.In this paper,3D porous Cu/Ni/Co@carbon composites derived from metal organic frameworks,using to degradation of organic pollutants in water environment synergistic with microwave.?1?Fabricate the octahedron porous Cu@graphitic carbon cage?Cu@GCC?derived from Cu-MOF,and showed its morphology,structure,particle size and surface area characteristics through the characterization of XRD,SEM,BET and so on.Methylene blue/lomefloxacin were regarded as target pollutants to study the microwave synergy degradation effect of Cu@GCC.Usual ions in degradation had no obvious effect.According to the mass spectrometry,methylene blue/lomefloxacin was decomposed into H₂O,CO₂,NO₃^-,SO₄^2-and F^-in a short time.The process conformed to the pseudo-first-order model.The reaction rate was 0.456 min^-1 and0.328 min^-1,respectively.Radicals trapping studies revealed that holes,superoxide radical and hydroxyl radical were the mainly active species.And explain the mechanism with localized surface plasmon resonance theory.After recycled four times,the degradation rate still more than 81%.?2?Fabricate the waxberry shape porous Ni@graphitic carbon cage?Ni@GCC?derived from Ni-MOF,and showed its morphology,structure and surface area characteristics through the characterization of XRD,SEM,BET and so on.Norfloxacin were regarded as target pollutants to study the microwave synergy degradation effect of Ni@GCC.The optimum degradation condition was:added 60mg Ni@GCC into 50 mL,10 mg·L^-1 norfloxacin solution.Reacted 7 min with microwave power was 700 W.And the degradation rate was 97.37%.Usual ions in degradation had no obvious effect.The process conformed to the pseudo-first-order model.The reaction rate was 0.415 min^-1.Radicals trapping studies revealed that holes,superoxide radical and hydroxyl radical were the mainly active species.And explain the mechanism with localized surface plasmon resonance theory.Ni@GCC had wonderful magnetic,could realize efficient separation through external magnet.After having been recycled five times,the degradation rate still more than 97%.?3?Fabricate the sphere shape porous Co@graphitic carbon cage?Co@GCC?derived from Co-MOF,and showed its morphology,structure and particle size characteristics through some methods.Tetracyline were regarded as target pollutants to study the microwave synergy degradation effect of Co@GCC.The optimum degradation condition was:added 30 mg Co@GCC into 50 mL,10 mg·L^-1 tetracyline solution.Reacted 5 min with microwave power was 700 W.And the degradation rate was 96.31%.Usual ions in degradation had no obvious effect.The process conformed to the pseudo-first-order model.The reaction rate was 0.650 min^-1.Radicals trapping studies revealed that holes,superoxide radical and hydroxyl radical were the mainly active species.And explain the mechanism with localized surface plasmon resonance theory.Co@GCC had wonderful magnetic,could realize efficient separation through external magnet.After having been recycled five times,the degradation rate still more than 94%.The above research showed that the absorbing material derived of MOF,could degraded organic pollutants with the synergism of microwave.Compared with traditional methods,this way changed reaction time from several hours to a few minutes,improved the efficiency of degradation.What's more,they had the performance of recycling,leading them to environmental friendly.