Porous Metal-Organic Framework Materials: Microwave Assisted Synthesis and Oxidative Catalytic Tests

2012 ◽  
Vol 730-732 ◽  
pp. 1024-1029
Author(s):  
André D.S. Barbosa ◽  
Salete S. Balula ◽  
Filipe A. Almeida Paz ◽  
Baltazar de Castro ◽  
Luís Cunha-Silva
Keyword(s):  
Catalytic Activity ◽  
Structural Stability ◽  
Metal Organic Framework ◽  
Microwave Assisted Synthesis ◽  
Ir Absorption ◽  
Oxidation Reactions ◽  
Framework Materials ◽  
Microwave Assisted ◽  
Metal Organic ◽  
Organic Framework

Metal-Organic Framework Materials MIL‑101(Cr) ([Cr3X(H2O)2O(bdc)3]∙n(H2O), where X− = F− or OH−, n ≈ 25 and H2bdc stands for 1,4-benzene-dicarboxylic acid] and MOF‑5(Zn) [Zn4O(bdc)3] were prepared by hydrothermal or solvothermal methods as well as Microwave‑Assisted Synthesis (MWAS), for which the detailed synthetic parameters were optimized. The crystal structures were confirmed by powder X-ray diffraction and the materials were further characterized by FT‑IR absorption spectroscopy. MIL‑101(Cr) and MOF‑5(Zn) showed weak catalytic activity in the oxidation of terpene, thiophene and cis-cyclooctene. Reasonable catalytic activity was observed for MOF-5(Zn) in the epoxidation of cis-cyclooctene and a 100 % of selectivity was observed for the epoxide. The structural stability of the materials was tested under the employed catalytic medium for oxidation reactions. MOF-5(Zn) revealed a remarkable structural stability at high temperature and also in the presence of high oxidant amounts.

Gas–liquid segmented flow microwave-assisted synthesis of MOF-74(Ni) under moderate pressures

CrystEngComm ◽  
2015 ◽  
Vol 17 (29) ◽  
pp. 5502-5510 ◽  
Author(s):  
Gustavo H. Albuquerque ◽  
Robert C. Fitzmorris ◽  
Majid Ahmadi ◽  
Nick Wannenmacher ◽  
Praveen K. Thallapally ◽  
...  
Keyword(s):  
Continuous Flow ◽  
Metal Organic Framework ◽  
Microwave Assisted Synthesis ◽  
Segmented Flow ◽  
Microwave Assisted ◽  
Metal Organic ◽  
Flow Through ◽  
Organic Framework

A representation of the continuous flow microwave-assisted synthesis of the metal organic framework, MOF-74(Ni). Precursor solutions flow through a microwave nucleation zone leading to the formation of MOF-74(Ni).

Efficient microwave assisted synthesis of metal–organic framework UiO-66: optimization and scale up

2015 ◽  
Vol 44 (31) ◽  
pp. 14019-14026 ◽  
Author(s):  
Marco Taddei ◽  
Phuong V. Dau ◽  
Seth M. Cohen ◽  
Marco Ranocchiari ◽  
Jeroen A. van Bokhoven ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Scale Up ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted ◽  
Metal Organic ◽  
Quantitative Indicators ◽  
Organic Framework

The microwave assisted synthesis of UiO-66 was optimized and scaled up to multigram production, evaluating the efficiency of the process by means of four quantitative indicators.

scholarly journals Microwave-Assisted Synthesis of the Flexible Iron-Based MIL-88B Metal-Organic Framework for Advanced Energetic Systems

2021 ◽  
Author(s):  
Mahmoud Y. Zorainy ◽  
Serge Kaliaguine ◽  
Mohamed Gobara ◽  
Sherif Elbasuney ◽  
Daria C. Boffito
Keyword(s):  
Metal Organic Framework ◽  
Catalytic Efficiency ◽  
Decomposition Temperature ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted ◽  
Metal Organic ◽  
Iron Based ◽  
Decomposition Enthalpy ◽  
Energetic Systems ◽  
Organic Framework

Abstract The 3D metal-organic framework (MOF), MIL-88B, built from the trivalent metal ions and the ditopic 1,4-Benzene dicarboxylic acid linker (H2BDC), distinguishes itself from the other MOFs for its flexibility and high thermal stability. MIL-88B was synthesized by a rapid microwave-assisted solvothermal method at high power (850 W). The iron-based MIL-88B [Fe3.O.Cl.(O2C-C6H4 -CO2)3] exposed oxygen and iron content of 29% and 24%, respectively, which offers unique properties as an oxygen-rich catalyst for energetic systems. Upon dispersion in an organic solvent and integration into ammonium perchlorate (AP) (the universal oxidizer for energetic systems), the dispersion of the MOF particles into the AP energetic matrix was uniform (investigated via elemental mapping using an EDX detector). Therefore, MIL-88B(Fe) could probe AP decomposition with the exclusive formation of mono-dispersed Fe2O3 nanocatalyst during the AP decomposition. The evolved nanocatalyst can offer superior combustion characteristics. XRD pattern for the MIL-88B(Fe) framework TGA residuals confirmed the formation of α-Fe2O3 nanocatalyst as a final product. The catalytic efficiency of MIL-88B(Fe) on AP thermal behavior was assessed via DSC and TGA. AP solely demonstrated a decomposition enthalpy of 733 J g-1 , while AP/MIL-88B(Fe) showed a 66% higher decomposition enthalpy of 1218 J g-1 ; the main exothermic decomposition temperature was decreased by 71 °C. Besides, MIL-88B(Fe) resulted in a decrease in AP decomposition activation energy by 23% and 25% using Kissinger and Kissinger–Akahira–Sunose (KAS) models, respectively.

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