Preparation of Series of Ti based Electrode and Electro catalytic Oxidation of Dye Wastewater
HU Feng ping,LIU Zhan meng and WANG Xiao miao
DOI:10.11835/j.issn.1674-4764.2010.05.018
Received December 21, 2009,Revised , Accepted , Available online July 01, 2015
Volume ,2010,Pages 97-101
- Abstract
Series of Ti based electrodes of Ti/PbO2, Ti/SnO2 Sb2O3/PbO2, Ti/SnO2 Sb2O3/PbO2 Cu, Ti/SnO2 Sb2O3/PbO2 Ni and Ti/SnO2 Sb2O3/PbO2 Fe were prepared by thermal decomposition method. And with these electrodes as anodes and the acid fuchsin as simulated dye wastewater, the electro catalytic oxidations of the simulated dye wastewater were performed. With the comparison of effects and reaction rate of different electrodes and the analysis of acid fuchsin oxidation process, it is shown that the electro catalytic abilities of the Fe modified electrode Ti/SnO2 Sb2O3/PbO2 Fe and Ni modified electrode Ti/SnO2 Sb2O3/PbO2 Ni have higher removal efficiency and removal ratio while the Cu modified electrode Ti/SnO2 Sb2O3/PbO2 Cu did not present a obvious modified effect compared with those by Ti/PbO2 and Ti/SnO2 Sb2O3/PbO2. Based on the test data, first order kinetic models of these five electrodes were established. From the UV VIS spectra of the Ti/SnO2 Sb2O3/PbO2 Fe electrode generated under the condition of 100 mg/L of initial concentration of acid fuchsin, 75 mA/cm2 of the density and 12 g/L of the electrolyte concentration (Na2SO4), it is found that the characteristic absorption peak of acid fuchsin at λmax =545 nm nearly disappeared in 60 min and the acid fuchsin was removed. However, some small molecular intermediate products were generated in the electro catalytic oxidation.