LaFe_(1-x)MnxO_(3)钙钛矿催化臭氧氧化降解间甲酚的研究  

Study on ozonation degradation of m-cresol catalyzed by LaFe_(1-x)MnxO_(3) perovskite

作　　者：姜鑫 武春艳 邵天华 王盛哲 卫皇曌[2] 赵颖[2] 孙承林[2] JIANG Xin;WU Chun-yan;SHAO Tian-hua;WANG Sheng-zhe;WEI Huang-zhao;ZHAO Ying;SUN Cheng-lin(Beijing North Energy Conservation Environment Protection Co.,Ltd.,Beijing 100070,China;Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China;School of Chemical Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]北京北方节能环保有限公司,北京100070 [2]中国科学院大连化学物理研究所,辽宁大连116023 [3]中国科学院大学化学工程学院,北京100049

出　　处：《现代化工》2022年第12期235-241,共7页Modern Chemical Industry

摘　　要：利用改进的共沉淀法合成了一系列不同铁锰掺杂比的LaFe_(1-x)MnxO_(3)钙钛矿催化剂。以间甲酚为模拟污染物,评估合成的LaFe_(1-x)MnxO_(3)钙钛矿催化剂的催化臭氧氧化活性,并对合成条件进行优化,在最佳合成条件下探究铁锰掺杂比的影响。通过SEM、XRD、TEM mapping对材料形貌结构进行表征,通过O2-TPD对催化剂氧空位进行研究,并结合GC-MS和HPLC-MS推测了间甲酚反应的降解过程。结果表明,LaFe_(0.26)Mn_(0.74)O_(3)催化剂具有最佳的催化效果;LaFe_(0.26)Mn_(0.74)O_(3)催化剂具有很好的稳定性;同时盐度对于间甲酚的降解有一定的抑制作用。A series of LaFe_(1-x)MnxO_(3)perovskite catalysts with different Fe/Mn doping ratios are synthesized via an improved coprecipitate method.M-cresol is taken as a simulated pollutant to evaluate the catalytic ozonation activity of the synthesized LaFe_(1-x)MnxO_(3).After optimizing the synthesis conditions, the effect of Fe/Mn doping ratio is investigated under the optimum synthesis conditions.The morphology and structure of the catalyst are studied by means of SEM,XRD and TEM mapping, and its oxygen vacancy is studied through O2-TPD.The degradation process of m-cresol is speculated by means of GC-MS and HPLC-MS.The results indicate that LaFe_(0.26)Mn_(0.74)O_(3)catalyst has the best catalytic effect and a good stability.Meanwhile, the salinity has a certain inhibition on the degradation of m-cresol.

关 键 词：LaFe_(1-x)MnxO_(3) 催化臭氧氧化 共沉淀法 降解机理 间甲酚 

分 类 号：TH3[机械工程—机械制造及自动化]