Removal of Toluene by Non-thermal Plasma Combined with CoxNiy-MOF-74 Catalyst

In this work, MOF-74 catalysts with various Co/Ni ratios obtained by hydrothermal method were prepared, and the degradation performance of various catalysts with synergistic non-thermal plasma for toluene was investigated. The addition of catalysts to NTP shown notable effects in toluene degradation and energy usage efficiency when compared to NTP alone. Notably, CoxNiy-MOF outperformed Co-MOF and Ni-MOF in terms of toluene catalytic activity. In comparison to the single plasma condition, Co2Ni3-MOF showed the maximum toluene degradation rate of 78% at the NTP discharge power of 11.66 W. SEM, BET, XRD, XPS, and FTIR were used to examine the impact of various Co/Ni ratios on the structure and redox characteristics of the samples. The interaction of Co and Ni results in many flaws and oxygen vacancies, increasing the amount of oxygen adsorbed on the surface and the reducibility of the catalyst, which is thought to be the cause of the rise in catalytic activity. Finally, based on the discovered organic compounds, the process of toluene breakdown in the plasma co-catalytic system was deduced. This work provides a novel concept for improving catalysts for the non-thermal plasma-catalyzed decomposition of toluene.

Automated summary

In this study, MOF-74 catalysts with various Co/Ni ratios were prepared by hydrothermal method, and their performance in the degradation of toluene under synergistic non-thermal plasma conditions was investigated. The results showed that the addition of catalysts significantly improved the degradation efficiency of toluene and the energy usage efficiency, with CoxNiy-MOF exhibiting the highest catalytic activity. The study also revealed the impact of different Co/Ni ratios on the structure and redox characteristics of the samples, which may be responsible for the enhanced catalytic activity.