介孔CoO_(x)/CeO_(2)制备及其降解染料废水探索型实验设计  

Exploratory Experiment Design on Degrading Dyes Wastewater by Mesoporous CoO_(x)/CeO_(2)

作　　者：张贺 刘营营 卢媛[1] 崔玉晓 翟利芳[1] ZHANG He;LIU Yingying;LU Yuan;CUI Yuxiao;ZHAI Lifang(College of Environmental Science and Engineering,Nankai University,Tianjin 300350,China)

机构地区：[1]南开大学环境科学与工程学院,天津300350

出　　处：《实验室研究与探索》2022年第11期23-27,共5页Research and Exploration In Laboratory

基　　金：国家自然科学基金项目(22076082);国家自然科学基金面上项目(22176102);南开大学自制仪器项目(2019NKZZYQ04、22NKZZYQ09)。

摘　　要：以类芬顿技术为背景,设计了一项涉及环境功能材料制备、结构表征、性能测试和机理探究等内容的探索型实验。该实验合成高度有序介孔CoOx/CeO_(2)复合材料,用于活化过一硫酸盐降解染料模拟废水,并采用TEM、XRD、BET和XPS技术对该催化剂进行表征,选用ESR技术对反应机理进行初步探究。结果表明,介孔CeO_(2)表面钴氧化物的负载极大增强了催化剂的类芬顿催化降解活性。在近中性、催化剂投加量0.6 g/L、PMS投加量0.3 g/L条件下,15%(质量百分数)CoOx/CeO_(2)可以在3 min内实现对罗丹明B的完全降解。依据ESR谱图,可以初步确定SO_(4)·^(-)、·OH和1 O_(2)是CoOx/CeO_(2)活化PMS降解RhB过程的主要活性氧物种。With the Fenton-like technology as the background,an exploratory experiment involving the preparation of environmental functional materials,structural characterization,performance testing,and mechanism exploration was designed.In this experiment,a highly ordered mesoporous CoO_(x)/CeO_(2)composite was designed and synthesized for the activation of peroxymonosulfateto degradedyes simulated wastewater.The catalyst was characterized by TEM、XRD、BET and XPS techniques.ESR technique was used to investigate the reaction mechanism.The results show that the loading of cobalt oxide on the surface of mesoporous CeO_(2)greatly enhances the Fenton-like catalytic degradation activity of the catalyst.Under the conditions of near neutrality,catalyst dosage of 0.6 g/L and PMS dosage of 0.3 g/L,15%CoO_(x)/CeO_(2)can achieve complete degradation of Rhodamine B within 3 minutes.According to the ESR spectra,it can be preliminarily determined that SO_(4)^(-),·OH and~1O_(2)are the main reactive oxygen species in the process of CoO_(x)/CeO_(2)activated PMS to degrade RhB.

关 键 词：类芬顿反应 介孔材料 染料降解 机理初探 

分 类 号：X703.1[环境科学与工程—环境工程] G642.0[文化科学—高等教育学]