Highly efficient capture of benzothiophene with a novel water-resistant-bimetallic Cu-ZIF-8 material

Well-constructed approach of exceptionally water-stable (mesoporous SiO2)-on-(microporous Cu-BTC) composite for efficient methylene blue capture

“…25,26 It was clear that those prime peaks of Cu 2p3/2 and Cu 2p1/2 orbitals were 20 eV apart, and their corresponding satellite peaks were 10 eV. 27,28 All these results were also in accordance with previous literature reports. Importantly, the XPS spectra of Si 2p orbitals (Fig.…”

Mixed-Metal Cu-BTC Metal–Organic Frameworks as a Strong Adsorbent for Molecular Hydrogen at Low Temperatures

“…This strategy exceptionally enhances the properties of MOF materials for various applications. Although, single-metal MOF materials were well studied for hydrogen adsorption, mixed-metal MOFs (MM-MOFs) were rarely investigated. − The expansion of MM-MOF materials is of exclusive concern since the assimilation of more metal ions can considerably increase the interaction of hydrogen molecule with the metal sites and the selectivity of MOF adsorption . A practical technique for the production of MM-MOFs is a post-synthetic exchange (PSE) method for metal ion or transmetalation that contains the replacement of the SBU metal nodes with another metal ion .…”

Enhanced Dibenzothiophene Capture with Multimetal–Organic Frameworks in the Presence of Benzene and Octane

“…Serious pollution problems resulting from S-containing compounds in commercial fuels have attracted people’s focus as they cause acid rain and threaten human health, which eventually causes ecological instability. − As a traditional industrial process, hydrodesulfurization is effective for mercaptan, thioether, and other aliphatic S compounds but almost invalid for thiophenic compounds (e.g., DBT). , Therefore, reducing the content of thiophenic compounds in liquid hydrocarbon fuels is an urgent research effort. − Adsorption desulfurization is considered one of the most promising techniques, especially for ultralow sulfur enrichment owing to its relatively low cost, simple design, mild operation conditions, easy regeneration, and so forth. − To date, various porous adsorbents loaded with metal ions, like porous carbons, zeolites, and mesoporous adsorbents, have been developed for deep desulfurization. − However, it is hard to further promote the desulfurization capacity of the current adsorbents due to their less surface area, simple shape, and uncontrollable pore shape. , Recently, adsorptive desulfurization with MOFs (metal–organic frameworks) has emerged as a promising method due to the open active sites and large porosity of these frameworks. , It is well known that the key issue of the adsorption technique is the directional design and the efficient fabrication of desirable adsorbents with excellent chemical stability, good selectivity, high capacity, and so forth. Based on Pearson’s hard and soft acid–base mechanism, the thiophenic sulfur molecules (soft bases) could be firmly combined with metal ions, like Zn 2+ , Ni 2+ , and Cu 2+ (soft Lewis acid). − Additionally, the π-complexation function, another easily understood mechanism, was first developed by Yang. , This interaction is generated by donating electrons from the π-orbitals of the adsorbates to the vacant s-orbitals of metal ions and simultaneously donating d-electrons of metals to the π* orbital of the adsorbates.…”