A lithium-modified zirconium-based metal organic framework (UiO-66) for efficient CO<sub>2</sub> adsorption

Niu, Zhaodong; Guan, Qingqing; Shi, Yuzhen; Chen, Yuan; Chen, Qiuling; Kong, Zhaoni; Ning, Ping; Tian, Senlin; Miao, Rongrong

doi:10.1039/c8nj04945a

Cited by 31 publications

(19 citation statements)

References 38 publications

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“…531 eV, which corresponds to the binding energy of Li–O bonds. 62 It could be concluded that the doped Li + ions did interact with the 1,4-benzenedicarboxylic acid ligand (i.e., exchange the carboxylate protons) and form lithium alkoxide (i.e., lithium carboxylate group). Besides, S atoms with weak negative charges might also interact with the positively charged surface of the UiO-66 framework to further intensify the chemical adsorption.…”

Section: Results and Discussionmentioning

confidence: 99%

Suppressing the Shuttle Effect in Lithium–Sulfur Batteries by a UiO-66-Modified Polypropylene Separator

et al. 2019

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The lithium–sulfur battery is one of the most promising battery technologies with high energy density that exceeds the presently commercialized ones. The shuttle effect caused by the migration of soluble polysulfides to the lithium anode is known as one of the crucial issues that prevent the Li–S batteries from practical application. Modification of the separator is regarded as a convenient yet efficient strategy to alleviate the shuttle effect. In this report, we use a thermally stable and chemically robust metal–organic framework (MOF), UiO-66, as a physical and chemical barrier for soluble polysulfides to functionalize the commercial polypropylene separator. The Li–S cell assembled with such a separator shows a significantly improved cycling stability with an average specific capacity of ca. 720 mA h g –1 at a current rate of 0.5 C for 500 cycles. Experimental and theoretical investigations indicate that the cell performance enhancement results from the physical restriction of the MOF barrier layer and strong chemical interaction between UiO-66 and polysulfides. The excellent thermal stability and chemical robustness (in acid/alkali solutions, conventional organic solvents, and polysulfide electrolytes) of UiO-66 make it highly competitive among various materials developed for separator modification in Li–S batteries.

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Section: Results and Discussionmentioning

confidence: 99%

Suppressing the Shuttle Effect in Lithium–Sulfur Batteries by a UiO-66-Modified Polypropylene Separator

et al. 2019

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“…Additionally, we compared the oxygen XPS of Zr-UiO-66 with the Ho-MOFs (Figure S10). In the case of the Zr MOF, a peak appears at lower binding energy that corresponds to the bridging oxygen in the cluster. − This peak is not present in the Ho-MOFs.…”

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confidence: 99%

Fluoro-Bridged Clusters in Rare-Earth Metal–Organic Frameworks

et al. 2021

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The modulator 2-fluorobenzoic acid (2-fba) is widely used to prepare RE clusters in metal–organic frameworks (MOFs). In contrast to known RE MOF structures containing hydroxide bridging groups, we report for the first time the possible presence of fluoro bridging groups in RE MOFs. In this report we discuss the synthesis of a holmium-UiO-66 analogue as well as a novel holmium MOF, where evidence of fluorinated clusters is observed. The mechanism of fluorine extraction from 2-fba is discussed as well as the implications that these results have for previously reported RE MOF structures.

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“…Particularly, capture and separation methods using solid adsorbents are significant for CO 2 removal. 42,43 Numerous studies have manifested that the adsorbents with considerable ultra-micropores have great advantages for CO 2 adsorption. 44,45 Therefore, CO 2 adsorptions were conducted to measure the promising application of ACFs.…”

Section: Resultsmentioning

confidence: 99%

Activated Carbon Fibers Prepared by One-Step Activation with CuCl₂ for Highly Efficient Gas Adsorption

Wang

Gan

et al. 2020

Ind. Eng. Chem. Res.

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Activated carbon fibers (ACFs) with high adsorption performance and mechanical strength are one of the essential materials to meet the needs of industrial gas adsorption. The activation step is the most critical step affecting the performance of ACFs. This study presents a facile one-step carbonization and activation method for preparing activated carbon fibers with a phenolic fiber as a carbonaceous precursor, followed by CuCl2 as an activating agent. The prepared activated carbon fiber (ACF-0.1) has three main advantages that are high microporosity of 89%, less use of an activator (mass ratio of PF and CuCl2 was 1:0.1), and excellent mechanical properties. In particular, taking advantage of ultra-micropores (<1 nm) created by low-dose CuCl2, activated carbon fibers can be used well as solid adsorbents for the CO2 capture, which show a high selectivity of 22.3 (calculated by IAST) and valid separation performance at 298 K and 0.15 bar. Meanwhile, the activated carbon fibers with developed micropores created by high-dose CuCl2 exhibit an active role in gas-phase toluene adsorption. In addition, the activated carbon fibers have considerable flexibility and outstanding mechanical strength, which is nearly 3 times as high as the commercial rayon-based fibers. This method is significant in producing high-performance activated carbon fibers for adsorption in practical engineering applications.

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A lithium-modified zirconium-based metal organic framework (UiO-66) for efficient CO₂ adsorption

Abstract: The adsorption mechanism of carbon dioxide (CO2) on Li/UiO-66 was studied by an in situ DRIFTS study.

Cited by 31 publications

References 38 publications

Suppressing the Shuttle Effect in Lithium–Sulfur Batteries by a UiO-66-Modified Polypropylene Separator

Suppressing the Shuttle Effect in Lithium–Sulfur Batteries by a UiO-66-Modified Polypropylene Separator

Fluoro-Bridged Clusters in Rare-Earth Metal–Organic Frameworks

Activated Carbon Fibers Prepared by One-Step Activation with CuCl₂ for Highly Efficient Gas Adsorption

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A lithium-modified zirconium-based metal organic framework (UiO-66) for efficient CO2 adsorption

Abstract: The adsorption mechanism of carbon dioxide (CO2) on Li/UiO-66 was studied by an in situ DRIFTS study.

Cited by 31 publications

References 38 publications

Suppressing the Shuttle Effect in Lithium–Sulfur Batteries by a UiO-66-Modified Polypropylene Separator

Suppressing the Shuttle Effect in Lithium–Sulfur Batteries by a UiO-66-Modified Polypropylene Separator

Fluoro-Bridged Clusters in Rare-Earth Metal–Organic Frameworks

Activated Carbon Fibers Prepared by One-Step Activation with CuCl2 for Highly Efficient Gas Adsorption

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Product

Resources

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A lithium-modified zirconium-based metal organic framework (UiO-66) for efficient CO₂ adsorption

Activated Carbon Fibers Prepared by One-Step Activation with CuCl₂ for Highly Efficient Gas Adsorption