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Processes
Special Issues
Design and Synthesis of Metal-Organic Framework Materials
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Design and Synthesis of Metal-Organic Framework Materials

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Materials Processes".

Deadline for manuscript submissions: 15 May 2024 | Viewed by 3789

Special Issue Editor

Dr. Chenxi Zhang

E-Mail Website
Guest Editor
College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, China
Interests: novel MOF synthesizing; proton conductive; photo catalysis; magnetic and fluorescent probe

Special Issue Information

Dear Colleagues,

Metal–organic framework materials (MOFs) are crystalline materials formed by the interaction of metal ions or metal clusters with organic ligands. In recent years, MOFs have been extensively studied due to their designable structures, modifiable functional groups, modular synthesis routes, etc. By rationally selecting metal ions and designing organic ligands, a variety of MOFs with different structures and properties can be constructed; therefore, these materials have potential application value in many fields such as catalysis, gas storage and separation, magnetism, fluorescence sensing, and proton conduction. In addition, MOFs can form novel composites when combined with graphene or polymers. MOF composites show great potentials for the selective adsorption of heavy metals and protein extraction and separation, and have significant applications in biomedical, drug release, protein regulation, etc.

In the synthesis of MOFs, due to their diverse metal centers and organic ligands, most metals can be used for the construction of MOFs, including the main group, transition, and lanthanide metals; the introduction of various functional groups can change the surface and pore environment properties of MOFs, affecting their physical and chemical properties. Historically, through the use of specific substituents to modify organic ligands, a variety of functionalized MOFs can be obtained for application in various specific fields due to their inherent high porosity, large specific surface area, high chemical stability, and adjustable porous structure.

Dr. Chenxi Zhang
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Processes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • metal–organic framework
  • crystal structure
  • catalysis
  • gas storage
  • separation
  • magnetism
  • fluorescence sensing
  • proton conduction
  • drug release

Published Papers (3 papers)

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Research

14 pages, 4699 KiB  
Article
Utilizing Recycled Expanded Polystyrene Plastics to Stabilize Metal–Organic Frameworks for Heterogeneous Catalysis
by Ruizhi Yin, Enxi Shen, Chenjia Liang, Dezhong Song, Samir El Hankari and Jia Huo
Processes 2024, 12(5), 961; https://doi.org/10.3390/pr12050961 - 9 May 2024
Viewed by 153
Abstract
Polystyrene plastics present significant environmental and human health threats due to their poor recyclability and degradability. However, leveraging their properties to enhance material performance stands out as one of the most effective strategies for mitigating these issues. Here, we have employed recycled expanded [...] Read more.
Polystyrene plastics present significant environmental and human health threats due to their poor recyclability and degradability. However, leveraging their properties to enhance material performance stands out as one of the most effective strategies for mitigating these issues. Here, we have employed recycled expanded polystyrene plastics to manufacture metal–organic framework/expanded polystyrene plastic composites (MOF@EPP) using an adverse solvent precipitation method. This method simultaneously recycles EPPs and safeguards moisture-sensitive MOFs. Due to the exceptional hydrophobic properties of EPPs, HKUST−1@EPP can maintain structural integrity even when immersed in water for 30 days. This method is applicable to other moisture-sensitive MOFs, such as MOF−74(Zn) and MIL−53(Al). The HKUST−1@EPP composite also exhibits desirable heterogeneous catalytic activity in the Knoevenagel condensation reaction between benzaldehyde and acrylonitrile. The conversion rate can reach 94.9% within 4 h at 90 °C and does not exhibit a significant decrease even after six cycles, even in the presence of water. This study not only introduces a novel concept for recycling polystyrene plastics, but also offers a practical strategy for safeguarding moisture-sensitive MOFs. Full article
(This article belongs to the Special Issue Design and Synthesis of Metal-Organic Framework Materials)
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13 pages, 11931 KiB  
Article
Pd-M (M = Ni, Co) Bimetallic Catalysts with Tunable Composition for Highly Efficient Electrochemical Formic Acid Oxidation
by Qingwei Ding, Qing Luo, Liang Lin, Tianlun Yang, Xingping Fu, Laisen Wang and Caixia Lei
Processes 2023, 11(6), 1789; https://doi.org/10.3390/pr11061789 - 12 Jun 2023
Viewed by 1064
Abstract
Bimetallic Pd-based catalysts for formic acid oxidation (FAO) are one of the most promising anode materials for the next generation of direct formic acid fuel cells (DFAFC). It is imperative to develop a simple strategy for preparing efficient, stable, and clean nanoparticle catalysts. [...] Read more.
Bimetallic Pd-based catalysts for formic acid oxidation (FAO) are one of the most promising anode materials for the next generation of direct formic acid fuel cells (DFAFC). It is imperative to develop a simple strategy for preparing efficient, stable, and clean nanoparticle catalysts. Herein, we prepared a series of Pd, PdNi, and PdCo nanoparticle catalysts using the nanoparticle beam composite deposition system, which revealed good catalytic activity and stability in the process of FAO. The incorporation of Ni or Co prevents the adsorption of active intermediates and the accumulation of toxic intermediates in the process of FAO. Therefore, more Pd active centers can be used to decompose formic acid directly by dehydrogenation. The results indicate that PdNi-2 (Pd0.9Ni0.1) and PdCo-3 (Pd0.89Co0.11) catalysts exhibit the optimal catalytic performance, with the mass activity of 1491.5 A g−1Pd and 1401.7 A g−1Pd, respectively, which is 2.1 and 2 times that of the pure Pd sample. By optimizing the rate of Pd to transition metal M (Ni, Co), a high-performance Pd-based catalyst was obtained through their synergistic effect, which provides a new approach for designing efficient anode catalysts for DFAFCs. Full article
(This article belongs to the Special Issue Design and Synthesis of Metal-Organic Framework Materials)
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7 pages, 4049 KiB  
Article
Exploring the Influence of the Reused Methanol Solution for the Structure and Properties of the Synthesized ZIF-8
by Xiaobing Yang, Tiantian Song, Taichao Su, Jiapeng Hu and Shichao Wu
Processes 2022, 10(9), 1705; https://doi.org/10.3390/pr10091705 - 26 Aug 2022
Cited by 2 | Viewed by 2055
Abstract
The zeolitic imidazolate framework-8 (ZIF-8), as a kind of MOF, is widely used in sensors, gas storage/separation, drug delivery, and catalysis due to its adjustable porous structure, high surface area, and excellent chemistry tunability. ZIF-8 is constructed by Zn2+ and 2-methylimidazole and [...] Read more.
The zeolitic imidazolate framework-8 (ZIF-8), as a kind of MOF, is widely used in sensors, gas storage/separation, drug delivery, and catalysis due to its adjustable porous structure, high surface area, and excellent chemistry tunability. ZIF-8 is constructed by Zn2+ and 2-methylimidazole and synthesized in the methanol solution. In this paper, we explored the influence of the reused methanol solution for the structure and properties of the synthesized ZIF-8. The as-synthesized ZIF-8 was characterized by an X-ray diffraction instrument (XRD), a scanning electron microscope (SEM), a specific surface area analyzer (BET), and Fourier transform infrared spectroscopy (FT-IR). The results show that the reused methanol solution does not change the phase, porous structure, and BET surface area of ZIF-8. However, the particle size of ZIF-8 increases from 50 nm to 5 um and the productive rate decreases to 7.4% when the methanol solution is reused four times. This work provides new insight into the reuse of dissolvents for the synthesis of MOFs. Full article
(This article belongs to the Special Issue Design and Synthesis of Metal-Organic Framework Materials)
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