Preparation of Graphene Oxide Modified UiO-66 Based Metal Organic Framework Gel and Efficient Toluene Adsorption Performance

doi:10.15541/jim20250265

Abstract

Abstract: Volatile organic compounds (VOCs), particularly aromatic hydrocarbons such as toluene, pose significant threats to the environment and human health due to their high volatility and biological toxicity. Traditional Metal-organic frameworks (MOFs) are primarily microporous, and the trade-off between adsorption capacity and molecular transport efficiency has driven the development of more advanced material systems. In this work, graphene oxide (GO) doped metal-organic framework gels (MOGs) based on UiO-66 were developed, leveraging the synergistic modification effect of GO. The π-conjugated structure of GO enhanced π-π interactions with toluene molecules, while its abundant oxygen-containing functional groups facilitated competitive coordination with metal nodes, leading to the exposure of additional Lewis acid sites and thereby enhancing metal-π interactions. Experimental results demonstrated that UG-1 exhibited a breakthrough adsorption capacity of 77.4 mg/g in dynamic adsorption experiments and a saturated capacity of up to 1245.5 mg/g in static tests, outperforming both UiO66 MOF and MOG materials. This study elucidates the multiple regulatory mechanisms of GO incorporation in modulating pore structure and host-guest interactions, providing a new theoretical basis and practical guidance for designing efficient and recyclable VOC adsorbents.

Key words: graphene oxide, metal-organic frameworks, volatile organic compounds, hierarchical pore structure

CLC Number:

TQ174

ZHU Kaihuang, YANG Shijie, LI Xinge, SONG Guanqing, SHI Gansheng, WANG Yan, REN Xiaomeng, LU Yao, XU Xinhong, SUN Jing. Preparation of Graphene Oxide Modified UiO-66 Based Metal Organic Framework Gel and Efficient Toluene Adsorption Performance[J]. Journal of Inorganic Materials, DOI: 10.15541/jim20250265.

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