Non-thermal plasma coupled with MOF-74 derived Mn-Co-Ni-O porous composite oxide for toluene efficient degradation

Xiangbo Feng; Changwei Chen; Chi He; Shouning Chai; Yanke Yu; Jie Cheng

doi:10.1016/j.jhazmat.2019.121143

Non-thermal plasma coupled with MOF-74 derived Mn-Co-Ni-O porous composite oxide for toluene efficient degradation

J Hazard Mater. 2020 Feb 5:383:121143. doi: 10.1016/j.jhazmat.2019.121143. Epub 2019 Sep 3.

Authors

Xiangbo Feng¹, Changwei Chen², Chi He³, Shouning Chai², Yanke Yu⁴, Jie Cheng⁵

Affiliations

¹ Shaanxi Key Laboratory of Safety and Durability of Concrete, Xijing University, Xi'an, 710123, Shaanxi, PR China; State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, PR China; Institute for Health and Environment, Chongqing University of Science and Technology, Chongqing, 401331, PR China.
² State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, PR China.
³ State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, PR China; National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing, 101408, PR China. Electronic address: chi_he@xjtu.edu.cn.
⁴ Department of Chemical Engineering, Columbia University, New York, 10027, United States.
⁵ National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing, 101408, PR China. Electronic address: jiecheng@ucas.ac.cn.

PMID: 31518814
DOI: 10.1016/j.jhazmat.2019.121143

Abstract

A novel strategy for removal of toluene by non-thermal plasma (NTP) coupled with metal-organic frameworks (MOFs) derived catalyst was proposed in this work. The MOF-derived porous trimetallic oxide catalyst (MnCoNiO_x, MCNO) was prepared by simple pyrolysis of a MOF-74(Mn-Co-Ni) precursor. We found that the MCNO material can well synergy with NTP in total decomposition of toluene owing to its high specific surface area, regular porous structure and excellent reducibility, which endow superior catalytic activity and CO₂ selectivity of NTP-MCNO system compared to that of NTP-MnO_x, NTP-CoO_x and NTP-NiO_x. For instance, the toluene degradation efficiency can reach up to 75.7% in NTP-MCNO system with a low specific input energy of 101 J/L, much higher than that of NTP-MnO_x (59.3%), NTP-CoO_x (70.9%), NTP-NiO_x (65.0%) and NTP alone (42.9%). Moreover, the formed ozone (O₃) can be well-controlled by the NTP-MCNO system due to the spinel-type oxides (MCNO) derived from MOF could generate more open-formwork structure and improve the mobility of oxygen. The results of this work would shed light on rational design and preparation of spinel-type oxides for oxidation applications, which provides guidance for further improvement of plasma-catalysis system.

Keywords: Metal-organic frameworks; Non-thermal plasma; Porous MnCoNiO(x) oxide; Selectivity; Toluene decomposition.

Publication types

Research Support, Non-U.S. Gov't