电沉积法制备Ce-Ps-LaCoO_(3)/Al_(2)O_(3)及臭氧催化降解焦化废水尾水的研究  

Preparation of Ce-Ps-LaCoO_(3)/Al_(2)O_(3) via electrodeposition and study on its performance in ozone catalytic degradation of tail water of coking wastewater

作　　者：段淑茹 朱开金 孙心 冯中营 赵彦亮 谭俊华 任晓莉 DUAN Shu-ru;ZHU Kai-jin;SUN Xin;FENG Zhong-ying;ZHAO Yan-liang;TAN Jun-hua;REN Xiao-li(School of Environment and Safety Engineering,North University of China,Taiyuan 030051,China;Department of Materials Engineering,Taiyuan Institute of Technology,Taiyuan 030008,China)

机构地区：[1]中北大学环境与安全工程学院,山西太原030051 [2]太原工业学院材料工程系,山西太原030008

出　　处：《现代化工》2024年第11期148-152,158,共6页Modern Chemical Industry

基　　金：山西省专利转化专项计划项目(202306010);山西省大同市重点研发项目(2023002)。

摘　　要：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(PO_4)_(x)-LaCoO_(3)/Al_(2)O_(3)(记为Ce-Ps-LaCoO_(3)/Al_(2)O_(3))。对Ce-Ps-LaCoO_(3)/Al_(2)O_(3)及在纯水中电化学沉积制得的CeO_(x)-LaCoO_(3)/Al_(2)O_(3)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-LaCoO_(3)/Al_(2)O_(3)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-LaCoO_(3)/Al_(2)O_(3)与CeO_(x)-LaCoO_(3)/Al_(2)O_(3)进行臭氧催化降解焦化尾水实验,结果表明,Ce-Ps-LaCoO_(3)/Al_(2)O_(3)对废水的化学需氧量去除率达到81%,比CeO_(x)-LaCoO_(3)/Al_(2)O_(3)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,CeOx-Ce(PO_(4))x-LaCoO_(3)/Al_(2)O_(3)(recorded as Ce-Ps-LaCoO_(3)/Al_(2)O_(3)),a stable and excellent catalyst,is prepared via electrodeposition in phosphate buffer solution.Both Ce-Ps-LaCoO_(3)/Al_(2)O_(3) and CeOx-LaCoO_(3)/Al_(2)O_(3) 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-LaCoO_(3)/Al_(2)O_(3) 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-LaCoO_(3)/Al_(2)O_(3) and CeOx-LaCoO_(3)/Al_(2)O_(3) is compared.It is found that the removal rate of chemical oxygen demand in wastewater by Ce-Ps-LaCoO_(3)/Al_(2)O_(3) reaches 81%,11%higher than that by CeOx-LaCoO_(3)/Al_(2)O_(3).The optimal dosage of Ce-Ps-LaCoO_(3)/Al_(2)O_(3) is 1.0 g·L^(-1).

关 键 词：电沉积 磷酸盐缓冲溶液 Ce-Ps-LaCoO_(3)/Al_(2)O_(3) CeO_(x) 焦化尾水 

分 类 号：X703[环境科学与工程—环境工程]