MW Synthesis of ZIF-7. The Effect of Solvent on Particle Size and Hydrogen Sorption Properties

MW Synthesis of ZIF-7. The Effect of Solvent on Particle Size and Hydrogen Sorption Properties

We report here fast (15 min) microwave-assisted solvothermal synthesis of zeolitic imidazolate framework material (ZIF-7). We have optimized solvent composition to achieve high porosity and hydrogen capacity and narrow particle size distribution. It was shown that synthesis in N,N-diethylformamide (...

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Main Authors: Vladimir A. Polyakov, Vera V. Butova, Elena A. Erofeeva, Andrei A. Tereshchenko, Alexander V. Soldatov
Format: Article
Language:English
Published: MDPI AG 2020-11-01
Series:Energies
Subjects:
ZIF-7
hydrogen storage
microwave synthesis
Online Access:https://www.mdpi.com/1996-1073/13/23/6306
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spelling doaj-518563681eb6494da68e090db43b31602020-11-30T00:02:22ZengMDPI AGEnergies1996-10732020-11-01136306630610.3390/en13236306MW Synthesis of ZIF-7. The Effect of Solvent on Particle Size and Hydrogen Sorption PropertiesVladimir A. Polyakov0Vera V. Butova1Elena A. Erofeeva2Andrei A. Tereshchenko3Alexander V. Soldatov4The Smart Materials Research Institute, Southern Federal University, Sladkova 178/24, Rostov-on-Don 344090, RussiaThe Smart Materials Research Institute, Southern Federal University, Sladkova 178/24, Rostov-on-Don 344090, RussiaThe Smart Materials Research Institute, Southern Federal University, Sladkova 178/24, Rostov-on-Don 344090, RussiaThe Smart Materials Research Institute, Southern Federal University, Sladkova 178/24, Rostov-on-Don 344090, RussiaThe Smart Materials Research Institute, Southern Federal University, Sladkova 178/24, Rostov-on-Don 344090, RussiaWe report here fast (15 min) microwave-assisted solvothermal synthesis of zeolitic imidazolate framework material (ZIF-7). We have optimized solvent composition to achieve high porosity and hydrogen capacity and narrow particle size distribution. It was shown that synthesis in N,N-diethylformamide (DEF) results in a layered ZIF-7 III phase, while N,N-dimethylformamide (DMF) as solvent leads to a pure ZIF-7 phase in microwave conditions. A mixture of toluene with DMF allows the production of pure ZIF-7 material only with the triethylamine additive. Obtained materials were comprehensively characterized. We have pointed out that both X-ray diffraction and infrared spectroscopy could be used for the identification of ZIF-7 or ZIF-7 III phases. Although samples obtained in DMF, and in a mixture of DMF, toluene, and triethylamine were assigned to the pure ZIF-7 phase, solvent composition significantly affected the size of particles in the material and nitrogen and hydrogen adsorption process.https://www.mdpi.com/1996-1073/13/23/6306ZIF-7hydrogen storagemicrowave synthesis
collection DOAJ
language English
format Article
sources DOAJ
author Vladimir A. Polyakov
Vera V. Butova
Elena A. Erofeeva
Andrei A. Tereshchenko
Alexander V. Soldatov
spellingShingle Vladimir A. Polyakov
Vera V. Butova
Elena A. Erofeeva
Andrei A. Tereshchenko
Alexander V. Soldatov
MW Synthesis of ZIF-7. The Effect of Solvent on Particle Size and Hydrogen Sorption Properties
Energies
ZIF-7
hydrogen storage
microwave synthesis
author_facet Vladimir A. Polyakov
Vera V. Butova
Elena A. Erofeeva
Andrei A. Tereshchenko
Alexander V. Soldatov
author_sort Vladimir A. Polyakov
title MW Synthesis of ZIF-7. The Effect of Solvent on Particle Size and Hydrogen Sorption Properties
title_short MW Synthesis of ZIF-7. The Effect of Solvent on Particle Size and Hydrogen Sorption Properties
title_full MW Synthesis of ZIF-7. The Effect of Solvent on Particle Size and Hydrogen Sorption Properties
title_fullStr MW Synthesis of ZIF-7. The Effect of Solvent on Particle Size and Hydrogen Sorption Properties
title_full_unstemmed MW Synthesis of ZIF-7. The Effect of Solvent on Particle Size and Hydrogen Sorption Properties
title_sort mw synthesis of zif-7. the effect of solvent on particle size and hydrogen sorption properties
publisher MDPI AG
series Energies
issn 1996-1073
publishDate 2020-11-01
description We report here fast (15 min) microwave-assisted solvothermal synthesis of zeolitic imidazolate framework material (ZIF-7). We have optimized solvent composition to achieve high porosity and hydrogen capacity and narrow particle size distribution. It was shown that synthesis in N,N-diethylformamide (DEF) results in a layered ZIF-7 III phase, while N,N-dimethylformamide (DMF) as solvent leads to a pure ZIF-7 phase in microwave conditions. A mixture of toluene with DMF allows the production of pure ZIF-7 material only with the triethylamine additive. Obtained materials were comprehensively characterized. We have pointed out that both X-ray diffraction and infrared spectroscopy could be used for the identification of ZIF-7 or ZIF-7 III phases. Although samples obtained in DMF, and in a mixture of DMF, toluene, and triethylamine were assigned to the pure ZIF-7 phase, solvent composition significantly affected the size of particles in the material and nitrogen and hydrogen adsorption process.
topic ZIF-7
hydrogen storage
microwave synthesis
url https://www.mdpi.com/1996-1073/13/23/6306
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