双模板法CeO_(2)/g-C_(3)N_(4)形貌特征及湿式催化过氧化性能  

Morphology and catalytic wet peroxidation of CeO_(2)/g-C_(3)N_(4)synthesized by the double-template method

作　　者：梁慧 李长波[1] 赵国峥[1] 王硕[1] 许洪祝 孙子凯 LIANG Hui;LI Changbo;ZHAO Guozheng;WANG Shuo;XU Hongzhu;SUN Zikai(School of Environmental and Safety Engineering,Liaoning Petrochemical University,Fushun 1130ol,Liaoning,China)

机构地区：[1]辽宁石油化工大学环境与安全工程学院,辽宁抚顺113001

出　　处：《精细化工》2022年第12期2505-2513,2540,共10页Fine Chemicals

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07202-002);辽宁省教育厅重点攻关项目(L2020003,L2020020)。

摘　　要：利用微波辅助双模板法、软模板法制备了一系列CeO_(2)/g-C_(3)N_(4)复合材料,通过XRD、N2吸附-脱附、XPS、SEM和TEM对材料进行了表征与分析,并对其湿式催化性能进行研究。结果表明,双模板法制备的D-CeO_(2)/g-C_(3)N_(4)表现出立方相CeO_(2)和层叠g-C_(3)N_(4)的特征,比表面积和孔径较大,属于介孔结构,表面存在Ce^(3+)和Ce^(4+),有利于氧空位的形成。加入1 g嵌段共聚物F127,以无水乙醇为溶剂,用Na OH调节混合液呈碱性,微波辐射反应120 min后得到的D-CeO_(2)/g-C_(3)N_(4)(7.5)(硝酸铈7.5 mmol)样品,CeO_(2)颗粒均匀负载于棒状g-C_(3)N_(4)表面,结构完整,孔隙明显。在催化性能实验中,控制反应温度75℃、D-CeO_(2)/g-C_(3)N_(4)(7.5)投加量0.7 g、H_(2)O_(2)投加量0.5 mL、初始pH为5、反应时间180 min、苯酚溶液(200 mL)初始质量浓度为100 mg/L,其苯酚去除率可达80%以上。D-CeO_(2)/g-C_(3)N_(4)(7.5)重复使用5次后,苯酚去除率仍可达60%以上。A series of CeO_(2)/g-C_(3)N_(4)composites were prepared by microwave-assisted double template method and soft template method.The composites obtained were then characterized and analyzed by XRD N2adsorption-desorption,XPS,SEM and TEM,and their wet catalytic properties were investigated.The results showed that the D-CeO_(2)/g-C_(3)N_(4)composites prepared by double template method exhibited a mesoporous structure of cubic CeO_(2)hybridized laminated g-C_(3)N_(4)with large specific surface area and pore size.The presence of Ce^(3+)and Ce^(4+)on the surface was conducive to the formation of oxygen vacancies The D-CeO_(2)/g-C_(3)N_(4)(7.5)(cerium nitrate 7.5 mmol),obtained via microwave radiation reaction of sodium hydroxide solution with 1 g block copolymer F127 dissolved in anhydrous ethanol for 120 min,exhibited a uniform and homogeneous structure with best morphological characteristic.In the catalytic performance test,under the conditions of reaction temperature being controlled at 75℃,D-CeO_(2)/g-C_(3)N_(4)(7.5)dosage of0.7 g,H_(2)O_(2)of 0.5 m L,initial pH of 5,reaction time of 180 min and initial mass concentration of phenol solution(200 m L)of 100 mg/L,the phenol removal rate reached more than 80%.Meanwhile,after D-CeO_(2)/g-C_(3)N_(4)(7.5)being recycled for 5 times,the phenol removal could still remained more than 60%.

关 键 词：微波辅助 双模板 CeO_(2)/g-C_(3)N_(4) 湿式催化过氧化 苯酚 催化技术 

分 类 号：X703.5[环境科学与工程—环境工程]