Preparation of Co/Sb modified molecular sieve particle electrode for electrocatalytic degradation
YU Pan1,2, YU Jian2, XIE Jian-jun1
1. College of Material Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China; 2. College of Civil Engineering, Hunan University, Changsha 410082, China
Abstract: In order to improve the electrocatalytic degradation efficiency of molecular sieve as particle electrode,Co/Sb is doped and loaded on MCM-41 molecular sieve by impregnation method to prepare particle electrode for the degradation of carbamazepine.The effects of initial pH,voltage and electrolyte concentration on the degradation efficiency of carbamazepine are investigated,hydroxyl radicals are detected,and the possible degradation path is analyzed.The results show that the particle electrode prepared under a cobalt to antimony molar ratio of 2∶1 exhibits the best electrocatalytic effect,over which the degradation efficiency of carbamazepine reaches 100% within 120 min when the initial pH is 3,the voltage is 8 V,the electrolyte concentration is 0.1 mol·L-1,the dosage of particles is 0.2 g·L-1,and the initial concentration of carbamazepine is 20 μmol·L-1.The degradation efficiency is about 23% higher than that over two-dimensional electrode.The three-dimensional electrocatalytic degradation of carbamazepine accords with the pseudo first-order dynamic model.
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