Electrocatalytic degradation of refractory reactive brilliant red X-3B wastewater was performed in self-made gas diffusion electrode with LaNiO3 as catalyst. XRD and SEM were applied for the characterization and analysis of catalyst and electrode. The catalysts were prepared by sol-gel method, effect of citric acid dosage, pH, and backing temperature on catalytic performance was investigated and the optimal preparation processes were determined as follow: mole ratio of citric acid to metal ions was 1.5: 1.0, pH was 9 and baking temperature was 750℃. Applying 0.6 g of catalyst, 0.6 g of pore-forming agent, 3.0 g of PTFE baking at 300 ℃ for 2 h, the obtained electrode presented best electro-catalytic property. All of these results indicated that the novel gas diffusion electrode could be used for electrochemical treatment of refractory organic wastewater.%研究了气体扩散电极用于难降解活性艳红X-3B染料废水的处理,优化了催化剂LaNiO3和气体扩散电极的制备工艺.采用凝胶-溶胶法制备催化剂LaNiO3,其最佳制备工艺为:柠檬酸与金属离子摩尔比1.5:1.0,pH 9,焙烧温度750℃;气体扩散电极的最佳制备工艺为:催化剂用量0.6 g,造孔剂用量0.6 g,聚四氟乙烯(PTFE)用量3.0 g,焙烧温度300℃.采用X射线衍射(XRD)、电子扫描显微镜(SEM)等检测分析方法对所制备的催化剂和气体扩散电极进行表征和分析.结果表明,新型气体扩散电极具有良好的电催化性能.
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