RETRACTED: Thermal Analysis of a Metal–Organic Framework ZnxCo1-X-ZIF-8 for Recent Applications

Abstract

Zeolitic imidazolate frameworks (ZIFs) are interesting materials for use in several aspects: energy storage material, gas sensing, and photocatalysis. The thermal stability and pyrolysis process are crucial in determining the active phase of the material. A deep understanding of the pyrolysis mechanism is in demand. Therefore, the thermodynamics and combustion process with different heating rates was examined, and the kinetic parameters were computed employing thermogravimetric tests. Based on the TG analysis of combustion, pyrolysis moves to the high-temperature region with an increase in heating rate. The decomposition process can be separated into the dehydration (300–503 K) and the pyrolysis reaction (703–1100 K). Three points of the decomposition process are performed by dynamical analysis owing to shifts of slopes, but the combustion process has only one stage. The Zeolitic imidazolate framework’s structure properties were examined using TDDFT-DFT/DMOl3 simulation techniques. Dynamical parameters, for instance, the possible mechanism, the pre-exponential factor, and the apparent activation energy are obtained through comparison using the Kissinger formula. The thermodynamics analysis of the Zn1-xCox-ZIF-8 materials is an effective way to explore the temperature influence on the process of pyrolysis, which can benefit several environment purifications, photocatalyst, and recent applications.

Zirconium ferrite incorporated zeolitic imidazolate framework-8: a suitable photocatalyst for degradation of dopamine and sulfamethoxazole in aqueous solution

“…48,49 The mass loss from 630 to 710 °C (ZrFe 2 O 4 ) and 510 to 900 °C (ZrFe 2 O 4 @ZIF-8) may be attributed to phase change and decomposition of ZIF-8 structure, respectively. Mass loss above 900 °C in ZrFe 2 O 4 @ZIF-8 may be attributed to structural collapse and carbonization, 50 while mass loss above 710 °C in ZrFe 2 O 4 may be due to phase change. ZrFe 2 O 4 and ZrFe 2 O 4 @ZIF-8 exhibited activity in the visible light region of the spectrum, as shown in Fig.…”

MOF‐Fe@C Nanocomposites for Microwave Absorption

“…In general, Fe-MOF-derived carbon-based composites can be used for microwave absorption due to their superior conductivity and magnetism, as well as sufficient defects and interfaces. [5][6][7][8] However, the carbon-based materials, magnetic metals, and oxides or carbides produced by single MIL-53 (Fe) material are severely hampered by their high density, excessive fill loads, and insufficient impedance matching. [9,10] Therefore, MIL-53 (Fe) materials can be physically and chemically compounded with dielectric materials or magnetic metals, which can optimize the microwave absorption performance of the material.…”