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Facile homogeneous precipitation method to prepare MnO2 with high performance in catalytic oxidation of ethyl acetate
Pan, Tingting; Deng, Hua; Kang, Shunyu; Zhang, Yan; Lian, Wang; Zhang, Changbin; He, Hong
2021-08-01
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume417Pages:-
AbstractA facile homogeneous precipitation method driven by synchronous reactions of urea hydrolysis and potassium permanganate reduction is proposed for preparation of MnO2 catalysts. Pure alpha-MnO2 nanostructures with different morphologies, including nanowires, nanorods and nanoparticles, were obtained by simply tuning the precipitation conditions. The evolution of materials derived from different preparation conditions was investigated via X-ray diffraction, transmission electron microscopy, N-2 adsorption, X-ray photoelectron spectroscopy, chemisorption and DFT calculations. The precipitation temperature and time significantly influenced the physiochemical properties of as-prepared catalysts. With increasing precipitation temperature and time, the degree of crystallinity, BET surface area and amount of surface-adsorbed oxygen of alpha-MnO2 exhibited a substantial increase. The main exposed surface facets varied from (2 0 0), (3 1 0) to (2 1 1) as temperature and time increased. The best precipitation temperature and time were 90 degrees C and 24 h respectively. The optimal alpha-MnO2 catalyst demonstrated 100% conversion of 1000 ppm ethyl acetate under the high space velocity of 78,000 h(-1) during a 113-h test at 190 degrees C, outperforming other manganese oxide catalysts and many typical noble metal catalysts in terms of activity and stability. Experimental results and DFT calculations were consistent and indicated that surface oxygen species originating from the (2 1 1) surface of alpha-MnO2 were most active. This study provides important insights for manipulating the morphology of MnO2 by a facile method and remarkably promoting the performance for ethyl acetate VOC elimination.
Department大气环境与污染控制实验室
KeywordCatalytic oxidation Volatile organic compound alpha-MnO2 Homogeneous precipitation method Ethyl acetate
WOS Research AreaEngineering, Environmental ; Engineering, Chemical
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/45619
Collection大气环境与污染控制实验室
Affiliation1.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Key Lab Urban Pollutant Convers, Xiamen 361021, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
Recommended Citation
GB/T 7714
Pan, Tingting,Deng, Hua,Kang, Shunyu,et al. Facile homogeneous precipitation method to prepare MnO2 with high performance in catalytic oxidation of ethyl acetate[J]. CHEMICAL ENGINEERING JOURNAL,2021,417:-.
APA Pan, Tingting.,Deng, Hua.,Kang, Shunyu.,Zhang, Yan.,Lian, Wang.,...&He, Hong.(2021).Facile homogeneous precipitation method to prepare MnO2 with high performance in catalytic oxidation of ethyl acetate.CHEMICAL ENGINEERING JOURNAL,417,-.
MLA Pan, Tingting,et al."Facile homogeneous precipitation method to prepare MnO2 with high performance in catalytic oxidation of ethyl acetate".CHEMICAL ENGINEERING JOURNAL 417(2021):-.
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