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以SnCl_4·5H_2O,Sb_2O_3和Ce(NO_3)_3·6H_2O为前驱体,采用溶胶-凝胶法制备了Ce改性Ti/SnO_2-Sb_2O_3电极。通过对Ce改性Ti/SnO_2-Sb_2O_3电极的析氧电位的测试及油田废水降解情况的考察,优化了稀土的掺杂量和热处理方法;分析了电极的电催化氧化能力。借助SEM,EDX和XRD等检测手段对所制备电极的表面形貌、元素组成、晶体结构进行了表征和分析。结果表明:最优掺杂比为Sn∶Sb∶Ce=100∶10∶2.5(摩尔比),最优热处理方法为方法二,此电极对目标有机物COD去除率达到91.2%,发现Ce的掺杂有利于电极催化性能的提高。
The Ce-modified Ti / SnO_2-Sb_2O_3 electrode was prepared by sol-gel method using SnCl_4 · 5H_2O, Sb_2O_3 and Ce (NO_3) _3 · 6H_2O as precursors. The oxygen evolution potential of Ce / Ti-SnO_2-Sb_2O_3 electrode and the degradation of oilfield wastewater were optimized. The doping amount and heat treatment of rare earth were optimized. The electrocatalytic oxidation ability of the electrode was analyzed. The surface morphology, elemental composition and crystal structure of the prepared electrode were characterized and analyzed by means of SEM, EDX and XRD. The results show that the optimal doping ratio is Sn: Sb: Ce = 100: 10: 2.5 (molar ratio). The optimal heat treatment is the second method. The COD removal rate of the target organic substance reaches 91.2% Is conducive to the improvement of electrode catalytic performance.