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001     491384
005     20250724152200.0
024 7 _ |a 10.1016/j.chemosphere.2022.135467
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100 1 _ |a Garg, Akash
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245 _ _ |a Gd(III) metal-organic framework as an effective humidity sensor and its hydrogen adsorption properties
260 _ _ |a Amsterdam [u.a.]
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520 _ _ |a Metal-organic frameworks (MOFs) represent a class of nanoporous materials built up by metal ions and organic linkers with several interesting potential applications. The present study described the synthesis and characterization of Gd(III)-based MOF with the chemical composition [Gd(BTC)(H$_2$O)]·DMF (BTC – trimesate, DMF = N,N′-dimethylformamide), known as MOF-76(Gd) for hydrogen adsorption/desorption capacity and humidity sensing applications. The structure and morphology of as-synthesized material were studied using powder X-ray diffraction, scanning and transmission electron microscopy. The crystal structure of MOF-76(Gd) consists of gadolinium (III) and benzene-1,3,5-tricarboxylate ions, one coordinated aqua ligand and one crystallization DMF molecule. The polymeric framework of MOF-76(Gd) contains 1D sinusoidally shaped channels with sizes of 6.7 × 6.7 Å propagating along c crystallographic axis. The thermogravimetric analysis, heating infrared spectroscopy and in-situ heating powder X-ray diffraction experiments of the prepared framework exhibited thermal stability up to 550 °C. Nitrogen adsorption/desorption measurement at −196 °C showed a BET surface area of 605 m$^2$ g$^{−1}$ and pore volume of 0.24 cm$^3$ g$^{−1}$. The maximal hydrogen storage capacity of MOF-76(Gd) was 1.66 wt % and 1.34 wt % −196 °C and −186 °C and pressure up to 1 bar, respectively. Finally, the humidity sensing measurements (water adsorption experiments) were performed, and the results indicate that MOF-76(Gd) is a suitable material for moisture sensing application with a fast response (11 s) and recovery time (2 s) in the relative humidity range of 11–98%.
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700 1 _ |a Almáši, Miroslav
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700 1 _ |a Bednarčík, Jozef
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700 1 _ |a Sharma, Rishabh
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700 1 _ |a Rao, Vikrant Singh
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700 1 _ |a Panchal, Priyanka
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700 1 _ |a Jain, Ankur
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700 1 _ |a Sharma, Anshu
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773 _ _ |a 10.1016/j.chemosphere.2022.135467
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