采用电沉积法在磷酸盐缓冲溶液中制得稳定且性能优异的催化剂CeO_x-Ce(PO₄)_x-LaCoO₃/Al₂O₃(记为Ce-Ps-LaCoO₃/Al₂O₃)。对Ce-Ps-LaCoO₃/Al₂O₃及在纯水中电化学沉积制得的CeO_x-LaCoO₃/Al₂O₃的形貌、晶型和比表面积等进行表征,结合电化学中电极析氧和电阻抗测试以及三维荧光光谱图进行催化剂性能测试,结果表明,在磷酸盐缓冲溶液中制备得到的催化剂Ce-Ps-LaCoO₃/Al₂O₃表现出优异的催化性能且具有更强的氧化性和稳定性。在同等条件下,对比加入Ce-Ps-LaCoO₃/Al₂O₃与CeO_x-LaCoO₃/Al₂O₃进行臭氧催化降解焦化尾水实验,结果表明,Ce-Ps-LaCoO₃/Al₂O₃对废水的化学需氧量去除率达到81%,比CeO_x-LaCoO₃/Al₂O₃提高了11%,且最佳投药量为1.0 g/L。

In order to effectively degrade biochemical tail water of coking wastewater,CeO_x-Ce(PO₄)_x-LaCoO₃/Al₂O₃ (recorded as Ce-Ps-LaCoO₃/Al₂O₃),a stable and excellent catalyst,is prepared via electrodeposition in phosphate buffer solution.Both Ce-Ps-LaCoO₃/Al₂O₃ and CeO_x-LaCoO₃/Al₂O₃ that is prepared by electrochemical deposition in pure water are characterized in terms of morphology,crystal type and specific surface area,and their catalyst performance is tested in combination with electrochemical electrode oxygen evolution and electrical impedance tests,as well as three-dimensional fluorescence spectra.The results show that Ce-Ps-LaCoO₃/Al₂O₃ prepared in phosphate buffer solution has excellent catalytic performance,stronger oxidation and better stability.Under the same conditions,the ozone catalytic degradation of coking tail water by Ce-Ps-LaCoO₃/Al₂O₃ and CeO_x-LaCoO₃/Al₂O₃ is compared.It is found that the removal rate of chemical oxygen demand in wastewater by Ce-Ps-LaCoO₃/Al₂O₃ reaches 81%,11% higher than that by CeO_x-LaCoO₃/Al₂O₃.The optimal dosage of Ce-Ps-LaCoO₃/Al₂O₃ is 1.0 g·L^-1.

段淑茹(1999-),女,硕士生,主要从事催化剂的制备及废水降解研究,691739326@qq.com;朱开金(1962-),男,博士,教授,主要从事化学技术和膜生物技术处理工业废水和生活污水的研究,通讯联系人,zkj621104@163.com。