Characterization and properties of Zn/Co zeolitic imidazolate frameworks vs. ZIF-8 and ZIF-67

2017 ◽  
Vol 5 (3) ◽  
pp. 952-957 ◽  
Author(s):  
Kui Zhou ◽  
Bibimaryam Mousavi ◽  
Zhixiong Luo ◽  
Shophot Phatanasri ◽  
Somboon Chaemchuen ◽  
...  
Keyword(s):  
Gas Adsorption ◽  
Zeolitic Imidazolate Frameworks ◽  
Zeolitic Imidazolate Framework

A novel Zn/Co zeolitic imidazolate framework (ZIF) has been constructed which demonstrates better gas adsorption (CO2, CH4 and N2) and catalytic (CO2 conversion) properties compared with ZIF-8 and ZIF-67.

Influence of Metal Substitution on the Pressure-Induced Phase Change in Flexible Zeolitic Imidazolate Frameworks

2018 ◽  
Author(s):  
C. Michael McGuirk ◽  
Tomče Runčevski ◽  
Julia Oktawiec ◽  
Ari Turkiewicz ◽  
mercedes K. taylor ◽  
...  
Keyword(s):  
Phase Change ◽  
Single Crystal ◽  
Gas Adsorption ◽  
High Capacity ◽  
Phase Changes ◽  
Zeolitic Imidazolate Frameworks ◽  
Metal Substitution ◽  
Heat Management ◽  
Metal Organic ◽  
First Time

<p>Metal–organic frameworks that display step-shaped adsorption profiles arising from discrete pressure-induced phase changes are promising materials for applications in both high-capacity gas storage and energy-efficient gas separations. The thorough investigation of such materials through chemical diversification, gas adsorption measurements, and <i>in situ </i>structural characterization is therefore crucial for broadening their utility. We examine a series of isoreticular, flexible zeolitic imidazolate frameworks (ZIFs) of the type M(bim)<sub>2</sub> (SOD; M = Zn<sup> </sup>(ZIF-7), Co (ZIF-9), Cd (CdIF-13); bim<sup>–</sup> = benzimidazolate), and elucidate the effects of metal substitution on the pressure-responsive phase changes and the resulting CO<sub>2</sub> and CH<sub>4</sub> step positions, pre-step uptakes, and step capacities. Using ZIF-7 as a benchmark, we reexamine the poorly understood structural transition responsible for its adsorption steps and, through high-pressure adsorption measurements, verify that it displays a step in its CH<sub>4 </sub>adsorption isotherms. The ZIF-9 material is shown to undergo an analogous phase change, yielding adsorption steps for CO<sub>2</sub> and CH<sub>4</sub> with similar profiles and capacities to ZIF-7, but with shifted threshold pressures. Further, the Cd<sup>2+</sup> analogue CdIF-13 is reported here for the first time, and shown to display adsorption behavior distinct from both ZIF-7 and ZIF-9, with negligible pre-step adsorption, a ~50% increase in CO<sub>2</sub> and CH<sub>4</sub> capacity, and dramatically higher threshold adsorption pressures. Remarkably, a single-crystal-to-single-crystal phase change to a pore-gated phase is also achieved with CdIF-13, providing insight into the phase change that yields step-shaped adsorption in these flexible ZIFs. Finally, we show that the endothermic phase change of these frameworks provides intrinsic heat management during gas adsorption. </p>

scholarly journals Zeolitic imidazolate framework (ZIF)-derived porous carbon materials for supercapacitors: an overview

RSC Advances ◽  
2020 ◽  
Vol 10 (71) ◽  
pp. 43733-43750
Author(s):  
Rabia Ahmad ◽  
Usman Ali Khan ◽  
Naseem Iqbal ◽  
Tayyaba Noor
Keyword(s):  
Porous Carbon ◽  
Carbon Materials ◽  
Synthetic Methods ◽  
Zeolitic Imidazolate Frameworks ◽  
Zeolitic Imidazolate Framework ◽  
Porous Carbon Materials

The present analysis focuses on the synthetic methods used for the application of supercapacitors with various mysterious architectures derived from zeolitic imidazolate frameworks (ZIFs).

Nano-gate opening pressures for the adsorption of isobutane, n-butane, propane, and propylene gases on bimetallic Co–Zn based zeolitic imidazolate frameworks

2019 ◽  
Vol 48 (14) ◽  
pp. 4685-4695 ◽  
Author(s):  
Ahmed Awadallah-F ◽  
Febrian Hillman ◽  
Shaheen A. Al-Muhtaseb ◽  
Hae-Kwon Jeong
Keyword(s):  
Microwave Method ◽  
Zeolitic Imidazolate Frameworks ◽  
Opening Pressure ◽  
Zeolitic Imidazolate Framework ◽  
Mixed Metal ◽  
Gate Opening ◽  
Pressure Threshold

In this article, zeolitic-imidazolate framework-8 (ZIF-8) and its mixed metal CoZn-ZIF-8 were synthesized via a rapid microwave method. They exhibited a nanogate opening pressure threshold for the adsorption of C3 and C4 compounds.

Influence of Metal Substitution on the Pressure-Induced Phase Change in Flexible Zeolitic Imidazolate Frameworks

2018 ◽  
Author(s):  
C. Michael McGuirk ◽  
Tomče Runčevski ◽  
Julia Oktawiec ◽  
Ari Turkiewicz ◽  
mercedes K. taylor ◽  
...  
Keyword(s):  
Phase Change ◽  
Single Crystal ◽  
Gas Adsorption ◽  
High Capacity ◽  
Phase Changes ◽  
Zeolitic Imidazolate Frameworks ◽  
Metal Substitution ◽  
Heat Management ◽  
Metal Organic ◽  
First Time

<p>Metal–organic frameworks that display step-shaped adsorption profiles arising from discrete pressure-induced phase changes are promising materials for applications in both high-capacity gas storage and energy-efficient gas separations. The thorough investigation of such materials through chemical diversification, gas adsorption measurements, and <i>in situ </i>structural characterization is therefore crucial for broadening their utility. We examine a series of isoreticular, flexible zeolitic imidazolate frameworks (ZIFs) of the type M(bim)<sub>2</sub> (SOD; M = Zn<sup> </sup>(ZIF-7), Co (ZIF-9), Cd (CdIF-13); bim<sup>–</sup> = benzimidazolate), and elucidate the effects of metal substitution on the pressure-responsive phase changes and the resulting CO<sub>2</sub> and CH<sub>4</sub> step positions, pre-step uptakes, and step capacities. Using ZIF-7 as a benchmark, we reexamine the poorly understood structural transition responsible for its adsorption steps and, through high-pressure adsorption measurements, verify that it displays a step in its CH<sub>4 </sub>adsorption isotherms. The ZIF-9 material is shown to undergo an analogous phase change, yielding adsorption steps for CO<sub>2</sub> and CH<sub>4</sub> with similar profiles and capacities to ZIF-7, but with shifted threshold pressures. Further, the Cd<sup>2+</sup> analogue CdIF-13 is reported here for the first time, and shown to display adsorption behavior distinct from both ZIF-7 and ZIF-9, with negligible pre-step adsorption, a ~50% increase in CO<sub>2</sub> and CH<sub>4</sub> capacity, and dramatically higher threshold adsorption pressures. Remarkably, a single-crystal-to-single-crystal phase change to a pore-gated phase is also achieved with CdIF-13, providing insight into the phase change that yields step-shaped adsorption in these flexible ZIFs. Finally, we show that the endothermic phase change of these frameworks provides intrinsic heat management during gas adsorption. </p>

scholarly journals Ionic Liquids-Functionalized Zeolitic Imidazolate Framework for Carbon Dioxide Adsorption

Materials ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2361 ◽  
Author(s):  
Xuyan Song ◽  
Jialin Yu ◽  
Min Wei ◽  
Ran Li ◽  
Xi Pan ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Surface Area ◽  
Average Pore Size ◽  
Carbon Dioxide Adsorption ◽  
Zeolitic Imidazolate Frameworks ◽  
Zeolitic Imidazolate Framework ◽  
Average Pore ◽  
Solid Sorbents

Ionic-liquid-functionalized zeolitic imidazolate frameworks (ZIF) were synthesized using the co-ligands of 2-methylimidazole and amine-functionalized ionic liquid during the formation process of frameworks. The resulting ionic-liquid-modified ZIF had a specific surface area of 1707 m2·g−1 with an average pore size of about 1.53 nm. Benefiting from the large surface area and the high solubility of carbon dioxide in ionic-liquid moieties, the synthesized materials exhibited a carbon dioxide adsorption capacity of about 24.9 cm3·g−1, whereas it was 16.3 cm3·g−1 for pristine ZIF at 25 °C under 800 mmHg. The results demonstrate that the modification of porous materials with ionic liquids could be an effective way to fabricate solid sorbents for carbon dioxide adsorption.

Boosting CO2 electroreduction over layered zeolitic imidazolate frameworks decorated with Ag2O nanoparticles

2017 ◽  
Vol 5 (36) ◽  
pp. 19371-19377 ◽  
Author(s):  
Xiaole Jiang ◽  
Haihua Wu ◽  
Sujie Chang ◽  
Rui Si ◽  
Shu Miao ◽  
...  
Keyword(s):  
Composite Material ◽  
Current Density ◽  
Zeolitic Imidazolate Frameworks ◽  
Zeolitic Imidazolate Framework ◽  
Faradaic Efficiency ◽  
Co2 Electroreduction ◽  
Ag2o Nanoparticles

The Ag2O/layered zeolitic imidazolate framework (ZIF) composite material shows much higher CO faradaic efficiency and current density than the layered ZIF or Ag/C alone towards CO2 electroreduction.

Temperature Induced Structural Transformations and Gas Adsorption in the Zeolitic Imidazolate Framework ZIF-8: A Raman Study

2013 ◽  
Vol 117 (43) ◽  
pp. 11006-11012 ◽  
Author(s):  
Gayatri Kumari ◽  
Kolleboyina Jayaramulu ◽  
Tapas Kumar Maji ◽  
Chandrabhas Narayana
Keyword(s):  
Gas Adsorption ◽  
Structural Transformations ◽  
Zeolitic Imidazolate Framework ◽  
Raman Study

scholarly journals Zeolitic Imidazolate Framework Antibody Conjugates in Bioanalytical Applications

2020 ◽  
Author(s):  
Ander Chapartegui Arias ◽  
Anna Raysyan ◽  
Ana Belenguer ◽  
Carsten Jaeger ◽  
Teodor Tchipilov ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Solid Substrate ◽  
Emerging Diseases ◽  
Lateral Flow ◽  
Enzyme Linked Immunosorbent Assay ◽  
Zeolitic Imidazolate Frameworks ◽  
Zeolitic Imidazolate Framework ◽  
Antibody Conjugates ◽  
Bioanalytical Applications ◽  
Future Work

<p>Improvements in bioanalytical technologies are driven by evolving threats and challenges to the global community. These challenges include emerging diseases, the need for substance screening and increasing environmental pollution. Here, we present a new bioanalytical concept that employs nanosized Metal-Organic Framework (MOF) particles as labels for antibody-based analytical methods, including enzyme-linked immunosorbent assay (ELISA) and lateral flow immunoassay (LFIA). A strategy for covalently linking antibodies to form stable, colloidal Zeolitic Imidazolate Frameworks (ZIFs) conjugates is described. The proof of principle for their use in LFIA is presented. In particular, ZIF-antibody conjugates displayed excellent behaviour in dispersion and good mobility via lateral flow on a solid substrate while retaining full selectivity of the antibody. Moreover, protein aggregation of the antibodies was prevented, suggesting protection against degradation in an exoskeleton-like manner. Our study could inspire future work to address global bioanalytical and diagnostic challenges.</p>

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