Preparation Of Transition Metal Hexacyanoferrate/Heterogeneous Carbon Composites And Application In Environment

In this work,graphene and carbon nano-tubules were alternately deposited at surface of carbon fibers using electrophoretic method to form heterogeneous carbon supporting with increased specific surface of near 20 times and improved spatial structure(CFt).Nickel hexacyanoferrate with double activated Ni and Fe sites was evenly deposited at the surface of aminated TC by normal pulse voltammetry with a size of 16.6 ± 3 nm in situ(NiHCF/NCFt).The characters were proved by FE-SEM,XRD,IR,XPS,and electrochemistry techniques.In the coexistence of pyridin and CO2,NiHCF/NTC shows good catalysis for pyridine reduction to pyridyl radical,which reacts readily with CO2 to form carbamate,then reduced to HCOOH at-0.7 V with promising selectivity and stability.NiHCF/BiHCF nanoparticles were electrodeposited at the surface of NCFt in one step(NiHCF/BiHCF/NCFt),which were characterized by FE-SEM,XRD,IR and electrochemical techniques.The cubic NiHCF and the regular hexagonal BiHCF were uniformly distributed at the surface of NCFt with a size of 19.8 ± 3 nm.The photoelectrocatalysis degradation of NiHCF/BiHCF/NCFt towards 2,6-DCP was investigated.Under 500 W high pressure mercury lamp,1.2 V for 3 h,the degradation rate was 95.3%.Moreover,the uptake of NiHCF/NCFt towards Cs+ was studied.The maximum adsorption capacity reached 38.83 ± 2 mg at 45 ?,pH 7 for 6 h.The adsorption involved a chemical adsorb process with a spontaneous endothermic reaction.