Highly efficient adsorption of iodine under ultrahigh pressure from aqueous solution

Liu, Rong; Zhang, Wei; Chen, Yuantao; Cheng, Xu; Hu, Guangzhuang; Han, Zhen

doi:10.1016/j.seppur.2019.115999

Cited by 46 publications

(10 citation statements)

References 28 publications

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“…In exceptional cases, a polar solvent can also be used. [62][63][64] For vapour diffusion, desolvated MOFs and solid iodine are placed in a closed chamber and iodine adsorption takes place over a few hours to several days depending upon the temperature and adsorption kinetics of a given material.…”

Section: Methodologies For Iodine Adsorption In Mofsmentioning

confidence: 99%

Adsorption of iodine in metal–organic framework materials

et al. 2022

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Section: Methodologies For Iodine Adsorption In Mofsmentioning

confidence: 99%

Adsorption of iodine in metal–organic framework materials

et al. 2022

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“…In the process of nuclear fuel reprocessing and nuclear accidents, capturing highly volatile radioactive iodine from tail gas is crucial to nuclear safety, environmental protection, public health, and the sustainable development of nuclear energy. − However, the latest scientific research proves that MOFs can be used as a kind of promising candidate for I 2 adsorption because of their large specific surface areas and Lewis acid/base sties, which are conducive for fast absorption and efficient storage. − In consideration of Lewis acid–base sites including Zn 2+ , free carboxyl groups, and large voids in the host frameworks, experiments were carried out to test the adsorptive function of NUC-69a as an adsorbent for I 2 molecules, which can freely enter the 10.0 × 7.6 Å 2 channels and potentially be concentrated through intermolecular force of Zn···I, π···I, O–H···I, and C–H···I. Referring to classical experiments, 50 mg of iodine was completely dissolved in 10 mL of hexane at ambient temperature to prepare the brown iodine solution, in which 50 mg of NUC-69a was introduced.…”

Section: Resultsmentioning

confidence: 99%

Robust Zn(II)-Organic Framework for High Catalytic Activity on Cycloaddition of CO₂ with Epoxides and Reversible Iodine Uptake

Liu

Chen

Fan

et al. 2023

Crystal Growth & Design

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Increasingly serious natural disasters caused by excessive CO2 emission have given birth to a series of carbon-neutral technologies, among which the chemical transformation of CO2 catalyzed by metal–organic framework (MOF)-based catalysts has become a focus. Herein, the self-assembly of zinc(II) cation and designed flexible multifunctional ligand of 1,3-di(5,6-dicarboxylbenzimidazol-1-ylmethyl)benzene (H4DDBB) generated a highly robust microporous material of {[Zn(H2DDBB)]·2NMP} n (NUC-69) with 1D rectangle open channels (10.0 × 7.6 Å2). Because the inner wall of voids is densely functionalized by free −COOH groups, Nimidazole atoms, and tetra-coordinated open metal sites, activated NUC-69a exhibits high catalytic performance on the cycloaddition reactions of CO2 with epoxides under mild conditions with high turnover number and turnover frequency. In addition, NUC-69a can be used as an efficient iodine adsorbent with a maximum adsorption capacity of 0.94 g/g (4.26 I2 molecules per formulation unit) and 1.28 g/g (5.81 I2 molecules per formulation unit) in hexane solution and the volatilization phase. Hence, this work provides a productive insight into the design of multifunctional microporous MOFs by enhancing the types of active sites, which makes the developed materials a broader application prospect.

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“…A comparison of typical reaction conditions for the PCN MOFs studied in this work (Supporting Information, Table S6) reveals significant differences in concentrations of the reagents, solvents, temperatures, duration of the reaction, Zr sources, and type of modulators. The choice of modulator is crucial for controlled crystallization of phase pure MOFs. ,, For PCN-222, stronger acidic modulators (dichloroacetic − acid or formic acid − ) are often used, compared to the weaker acids (propionic acid , or acetic acid − ) utilized in the synthesis of PCN-224, PCN-223, and MOF-525. On the other hand, one common modulator, benzoic acid, acts as a “universal modulator” and has been used for all porphyrinic MOFs (Supporting Information, Table S6). ,− In general, temperatures between 65 and 130 °C are preferred, while reaction times are varied in the hours to days range.…”

Section: Resultsmentioning

confidence: 99%

Luminescent Porphyrinic Metal–Organic Frameworks for Oxygen Sensing: Correlation of Nanostructure and Sensitivity

Burger

Velasquez

Carbonell

et al. 2022

ACS Appl. Nano Mater.

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Oxygen sensing capabilities of a series of luminescent zirconium-based porphyrinic metal−organic frameworks (MOFs) have been investigated. Design of experiments allowed identification of the most sensitive material, a PCN-224 MOF. In this material, luminescence in air is quenched by up to 7.3-fold with a bimolecular quenching constant k q of 56,000 Pa −1 s −1 , which is significantly above the previously reported benchmark material of the same MOF type (k q of 34,000 Pa −1 s −1 ). The oxygen sensitivity increases in the order PCN-222 < PCN-223 < PCN-224 with effective Stern−Volmer (SV) constants in the range of 0.13 kPa −1 for PCN-222, 0.18 kPa −1 for PCN-223 and up to 0.45 kPa −1 for PCN-224-type materials. This effect is attributed to the increase in the porphyrin−porphyrin separation in these nanostructured materials that results in the increase in the fluorescence decay time and thus the probability of the quenching event. Defects in the nanostructure also are important and explain variations in the sensitivity within the MOFs of the same type. Among the investigated materials, those belonging to the PCN-223 type were found to be the most robust in terms of oxygen sensing capabilities with only little variation in the SV constants. The analogues of the PCN MOFs that utilize a Pt(II) porphyrin as a building block were also prepared. It is shown that the same synthetic protocols established for the metal-free systems can be used for the metal complex. Analogous to the MOFs based on the metal-free porphyrin, the oxygen sensitivity increases from Pt(II)PCN-222 (K SV 30 kPa −1 ) via Pt(II)PCN-223 (K SV 40 kPa −1 ) to Pt(II)PCN-224 (K SV up to 87 kPa −1 ).

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Highly efficient adsorption of iodine under ultrahigh pressure from aqueous solution

Cited by 46 publications

References 28 publications

Adsorption of iodine in metal–organic framework materials

Adsorption of iodine in metal–organic framework materials

Robust Zn(II)-Organic Framework for High Catalytic Activity on Cycloaddition of CO₂ with Epoxides and Reversible Iodine Uptake

Luminescent Porphyrinic Metal–Organic Frameworks for Oxygen Sensing: Correlation of Nanostructure and Sensitivity

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Highly efficient adsorption of iodine under ultrahigh pressure from aqueous solution

Cited by 46 publications

References 28 publications

Adsorption of iodine in metal–organic framework materials

Adsorption of iodine in metal–organic framework materials

Robust Zn(II)-Organic Framework for High Catalytic Activity on Cycloaddition of CO2 with Epoxides and Reversible Iodine Uptake

Luminescent Porphyrinic Metal–Organic Frameworks for Oxygen Sensing: Correlation of Nanostructure and Sensitivity

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Robust Zn(II)-Organic Framework for High Catalytic Activity on Cycloaddition of CO₂ with Epoxides and Reversible Iodine Uptake