A Review of HKUST-1 Metal-Organic Frameworks in Gas Adsorption

Abstract The discovery of the Hong Kong University of Science and Technology-1 (HKUST-1) metal-organic framework has made a remarkable improvement in the metal-organic frameworks to achieve the goal of air polluted gas adsorption. Nowadays, HKUST-1 has become a new alternative used as an ideal platform for gas adsorption due to the open metal sites inside the structure with the large adsorption capacity and chemical tunability. The adsorption performance was related to the formation and preparation of the HKUST-1 and its effect on other fabrication parameters. The impact on the fabrications of HKUST-1, such as solvents, reactants, temperature and time, grinding process, and pressure, affected the formation of the surface area and performance of HKUST-1. Air pollution gases such as carbon dioxide (CO 2 ), volatile organic compounds (VOCs), and methane (CH 4 ) adsorption on HKUST-1 were studied and discussed. The structure of the HKUST-1 with the presence of the open metal sites, Lewis acid, and the benzene ring structure were the key components to act as a good adsorbate for CO 2 , CH 4 , and VOCs gas. Moreover, the incorporated post-synthesized HKUST-1, such as the added functional group, metal cations, or composite materials, could exhibit great adsorption capacities for the polluted gas instead of pristine HKUST-1.