Work

Low-temperature catalytic oxidation of toluene using CeO2@MIL-101(Fe): Stability against water and SO2

Year: 2025

Type: article

Abstract: Toluene, a volatile organic compound (VOC), poses significant environmental and health risks, necessitating efficient abatement technologies. This study explores the catalytic oxidation of toluene using CeO2-supported MIL-101(Fe) metal-organic frameworks (MOFs). A series of CeO2@MIL-101(Fe) catalysts with varying Ce loadings were synthesized and characterized through XRD, BET, XPS, SEM, HRTEM, H2-TPR, and in situ DRIFTS analyses. Among the synthesized materials, 6% CeO2@MIL-101(Fe) exhibited superior catalytic performance, achieving 90% toluene conversion (T90) at 239°C, alongside remarkable stability over 60 hours. The catalyst demonstrated high resistance to water vapor and sulfur dioxide (SO2), with full activity recovery after the removal of inhibitors. In situ DRIFTS provided insights into the reaction mechanism, indicating that lattice oxygen plays a crucial role in toluene activation. The synergistic interaction between CeO2 and the MIL-101(Fe) support enhances redox properties and oxygen mobility, contributing to improved catalytic efficiency. These findings offer valuable insights into designing robust, MOF-based catalysts for VOC removal, providing a promising approach to mitigating air pollution.

Source: Process Safety and Environmental Protection

DOI: 10.1016/j.psep.2025.107005