Electrooxidation of Metal Complexes on ATO/SiO2Macroporous Electrodes
Abstract: Large-sized and macroporous SiO2 was used as a new support in which SnCl2 and SbCl3 were introduced in solution state and then converted into nano-sized Sb-SnO2 (ATO) through two-step hydrolysis and subsequent calcination at high temperature. The structures of the new materials were characterized by SEM, HRTEM and XRD, and the properties such as specific surface area and conductivity were also measured. The new materials have been served as macroporous anodes to study the electro-catalytic oxidation of complexes containing metal ions such as Fe, Cu and Ni. The solid products from the oxidation of the Fe complexes and Ni complexes were identified by XPS to be Fe2O3xH2O and NiO, respectively, while the product from Cu complexes was elementary copper. The measurement of the content of metal in solution by means of atom absorption indicated that above 90% of metal can be recycled from the solution of the corresponding complex. Through measuring the COD of pure ligands during oxidation it was found that CN–, SCN– and EDTA can be degraded to produce less harmful substances, the final COD reached to a very low level. Further-step investigations indicated that SCN– can be desulfurized in the macroporous anode to produce CN– and sulfur. Since both of S2- and SO42- were found in the mixture of the products, it might be implied that a disproportionation reaction of the resulted sulfur had been induced on the surface of nano-ATO probably by strong effect of polarization.
文章引用: 柴张琳 , 张钰 , 张瑞丰 , 肖通虎 (2012) 金属配合物在ATO/SiO2大孔电极上的电催化氧化。 材料科学， 2， 28-35. doi: 10.12677/ms.2012.21005
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