scholarly journals Enhancing the Water Capacity in Zr-Based Metal–Organic Framework for Heat Pump and Atmospheric Water Generator Applications

2019 ◽  
Vol 2 (5) ◽  
pp. 3050-3059 ◽  
Author(s):  
A. Luna-Triguero ◽  
A. Sławek ◽  
H. P. Huinink ◽  
T. J. H. Vlugt ◽  
A. Poursaeidesfahani ◽  
...  
Keyword(s):  
Heat Pump ◽  
Metal Organic Framework ◽  
Atmospheric Water ◽  
Water Capacity ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Autonomous atmospheric water seeping MOF matrix

2020 ◽  
Vol 6 (42) ◽  
pp. eabc8605
Author(s):  
G. Yilmaz ◽  
F. L. Meng ◽  
W. Lu ◽  
J. Abed ◽  
C. K. N. Peh ◽  
...  
Keyword(s):  
Fresh Water ◽  
Metal Organic Framework ◽  
Sorption Kinetics ◽  
Solar Irradiation ◽  
Atmospheric Water ◽  
Polymer Metal ◽  
Metal Organic ◽  
Delivery Efficiency ◽  
Organic Framework ◽  
Liquid Delivery

The atmosphere contains an abundance of fresh water, but this resource has yet to be harvested efficiently. To date, passive atmospheric water sorbents have required a desorption step that relies on steady solar irradiation. Since the availability and intensity of solar radiation vary, these limit on-demand desorption and hence the amount of harvestable water. Here, we report a polymer–metal-organic framework that provides simultaneous and uninterrupted sorption and release of atmospheric water. The adaptable nature of the hydro-active polymer, and its hybridization with a metal-organic framework, enables enhanced sorption kinetics, water uptake, and spontaneous water oozing. We demonstrate continuous water delivery for 1440 hours, producing 6 g of fresh water per gram of sorbent at 90% relative humidity (RH) per day without active condensation. This leads to a total liquid delivery efficiency of 95% and an autonomous liquid delivery efficiency of 71%, the record among reported atmospheric water harvesters.

Humidity Reduction by Using Hetero-layered Metal-Organic Framework Nanosheet Composites as Hygroscopic Materials

2021 ◽  
Author(s):  
Yang-Hui Luo ◽  
Cong Wang ◽  
Shu-Hua Ma ◽  
Xiao-Wei Jin ◽  
Ya-Chen Zou ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Atmospheric Water ◽  
Metal Organic ◽  
Organic Framework

The development of atmospheric water generator has depended critically on the preparation of hygroscopic materials. In our systematic efforts toward porous frameworks for effective humidity reduction, a super hygroscopic materials,...

Copper foam coated with CPO-27(Ni) metal–organic framework for adsorption heat pump: Simulation study using OpenFOAM

2020 ◽  
Vol 178 ◽  
pp. 115498
Author(s):  
Joana M. Pinheiro ◽  
Sérgio Salústio ◽  
Vítor Geraldes ◽  
Anabela A. Valente ◽  
Carlos M. Silva
Keyword(s):  
Heat Pump ◽  
Simulation Study ◽  
Metal Organic Framework ◽  
Adsorption Heat ◽  
Copper Foam ◽  
Adsorption Heat Pump ◽  
Metal Organic ◽  
Organic Framework

Multifunctional metal–organic framework heterostructures for enhanced cancer therapy

2021 ◽  
Author(s):  
Jintong Liu ◽  
Jing Huang ◽  
Lei Zhang ◽  
Jianping Lei
Keyword(s):  
Cancer Therapy ◽  
General Principle ◽  
Biomedical Applications ◽  
Metal Organic Framework ◽  
Metal Organic ◽  
Functional Modulation ◽  
Organic Framework

We review the general principle of the design and functional modulation of nanoscaled MOF heterostructures, and biomedical applications in enhanced therapy.

Magnetic Ordering via Itinerant Ferromagnetism in a Metal-Organic Framework

2020 ◽  
Author(s):  
Jesse Park ◽  
Brianna Collins ◽  
Lucy Darago ◽  
Tomce Runcevski ◽  
Michael Aubrey ◽  
...  
Keyword(s):  
Charge Transport ◽  
Magnetic Order ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Magnetic Ordering ◽  
Double Exchange ◽  
Itinerant Ferromagnetism ◽  
Organic Solids ◽  
Metal Organic ◽  
Organic Framework

<b>Materials that combine magnetic order with other desirable physical attributes offer to revolutionize our energy landscape. Indeed, such materials could find transformative applications in spintronics, quantum sensing, low-density magnets, and gas separations. As a result, efforts to design multifunctional magnetic materials have recently moved beyond traditional solid-state materials to metal–organic solids. Among these, metal–organic frameworks in particular bear structures that offer intrinsic porosity, vast chemical and structural programmability, and tunability of electronic properties. Nevertheless, magnetic order within metal–organic frameworks has generally been limited to low temperatures, owing largely to challenges in creating strong magnetic exchange in extended metal–organic solids. Here, we employ the phenomenon of itinerant ferromagnetism to realize magnetic ordering at <i>T</i><sub>C</sub> = 225 K in a mixed-valence chromium(II/III) triazolate compound, representing the highest ferromagnetic ordering temperature yet observed in a metal–organic framework. The itinerant ferromagnetism is shown to proceed via a double-exchange mechanism, the first such observation in any metal–organic material. Critically, this mechanism results in variable-temperature conductivity with barrierless charge transport below <i>T</i><sub>C</sub> and a large negative magnetoresistance of 23% at 5 K. These observations suggest applications for double-exchange-based coordination solids in the emergent fields of magnetoelectrics and spintronics. Taken together, the insights gleaned from these results are expected to provide a blueprint for the design and synthesis of porous materials with synergistic high-temperature magnetic and charge transport properties. </b>

Solvent-Free Powder Synthesis and MOF-CVD Thin Films of the Mesoporous Metal-Organic Framework MAF-6

2019 ◽  
Author(s):  
Timothée Stassin ◽  
Ivo Stassen ◽  
Joao Marreiros ◽  
Alexander John Cruz ◽  
Rhea Verbeke ◽  
...  
Keyword(s):  
Vapor Phase ◽  
Metal Organic Framework ◽  
Chemical Vapor ◽  
Uptake Capacity ◽  
Powder Synthesis ◽  
Crystalline Films ◽  
Metal Organic ◽  
Mesoporous Metal ◽  
First Time ◽  
Organic Framework

A simple solvent- and catalyst-free method is presented for the synthesis of the mesoporous metal-organic framework (MOF) MAF-6 (RHO-Zn(eIm)2) based on the reaction of ZnO with 2-ethylimidazole vapor at temperatures ≤ 100 °C. By translating this method to a chemical vapor deposition (CVD) protocol, mesoporous crystalline films could be deposited for the first time entirely from the vapor phase. A combination of PALS and Kr physisorption measurements confirmed the porosity of these MOF-CVD films and the size of the MAF-6 supercages (diam. ~2 nm), in close agreement with powder data and calculations. MAF-6 powders and films were further characterized by XRD, TGA, SEM, FTIR, PDF and EXAFS. The exceptional uptake capacity of the mesoporous MAF-6 in comparison to the microporous ZIF-8 is demonstrated by vapor-phase loading of a molecule larger than the ZIF-8 windows.

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