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Molecules
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Zeolite: A Strategic Materials for Sustainable Chemistry and Future Energy
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Zeolite: A Strategic Materials for Sustainable Chemistry and Future Energy

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 2056

Special Issue Editors

Prof. Dr. Yi Tang

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Guest Editor
Department of Chemistry, Fudan University, Shanghai 200433, China
Interests: zeolite catalysis and nanomaterials for energy conversion and fine chemicals production
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Wenfu Yan

E-Mail Website
Guest Editor
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
Interests: synthesis and applications of zeolites; inorganic porous materials
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. **nwen Guo

E-Mail Website
Guest Editor
State Key Laboratory of Fine Chemicals, Department of Catalytic Chemistry and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian, China
Interests: TS-1; epoxidation; titanium species; mother liquor
Prof. Dr. Jiuxing Jiang

E-Mail Website
Guest Editor
MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China
Interests: zeolite; molecular sieve; extra-large pore; deNOx; NH3SCR
Dr. Zhendong Liu

E-Mail Website
Guest Editor
State Key Laboratory of Chemical Engineering Department of Chemical Engineering, Tsinghua University, Haidian District, Bei**g 100084, China
Interests: synthesis and application of zeolites; microreaction technology
Special Issues, Collections and Topics in MDPI journals
Dr. Hongbin Zhang

E-Mail Website
Guest Editor
Institute for Preservation of Chinese Ancient Books, Fudan University Library, Fudan University, Shanghai 200433, China
Interests: inorganic porous material; functional composites; zeolite; protection of cultural relics; heterogeneous catalysis

Special Issue Information

Dear Colleagues,

Zeolites feature well-defined frameworks that create molecule-sized pores, channels and cages. Zeolites are magical in the sense that, by changing their synthesis conditions, different zeolites with distinct framework topologies and/or chemical compositions can be prepared, which lead to a variety of properties and functionalities. Over the decades, zeolites have significantly contributed to chemical and petrochemical processes as catalysts, adsorbents and ion exchangers. Their applications have recently been extended to biomass conversion, the reduction in vehicle emissions, methane activation and secondary batteries. Without doubt, zeolites will continue to play a critical role in new chemical transformations and future energy conversion. Driven by such application prospects, the research in the field of zeolites remains highly active.

With the title of “Zeolite: A Strategic Materials for Sustainable Chemistry and Future Energy,” this Special Issue of Molecules aims to attract original contributions from various topics related to zeolites, covering aspects ranging from the synthesis, modification and characterization to existing and emerging applications in broad areas. In particular, submissions of research papers about the synthesis of new zeolites, the mechanistic studies of zeolite crystallization, and the applications of zeolites in new fields are welcome.

Prof. Dr. Yi Tang
Prof. Dr. Wenfu Yan
Prof. Dr. **nwen Guo
Prof. Dr. Jiuxing Jiang
Prof. Dr. Zhendong Liu
Dr. Hongbin Zhang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at mdpi.longhoe.net 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. Molecules is an international peer-reviewed open access semimonthly 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 2700 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

  • synthesis and characterization of zeolite/active sites in zeolites
  • catalytic applications of zeolites
  • surface modification of zeolites
  • molecular docking in mechanism investigation of zeolites
  • zeolites in adsorption and separation processes
  • zeolites in sustainable chemistry
  • zeolites in energy conversion
  • new applications of zeolites

Published Papers (3 papers)

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Research

14 pages, 1386 KiB  
Article
Characterisation of Basic Sites on Ga2O3, MgO, and ZnO with Preadsorbed Ethanol and Ammonia—IR Study
by Jerzy Podobiński and Jerzy Datka
Molecules 2024, 29(13), 3070; https://doi.org/10.3390/molecules29133070 - 27 Jun 2024
Viewed by 208
Abstract
The effect of adsorption of ethanol and ammonia on the basicity of Ga2O3, MgO, and ZnO was examined via IR studies of CO2 adsorption. Ethanol reacts with OH groups on Ga2O3, and MgO, forming [...] Read more.
The effect of adsorption of ethanol and ammonia on the basicity of Ga2O3, MgO, and ZnO was examined via IR studies of CO2 adsorption. Ethanol reacts with OH groups on Ga2O3, and MgO, forming ethoxyl groups. The substitution of surface hydroxyls by ethoxyls increases the basicity of the neighbouring oxygen. The ethoxyl groups that also form on ZnO do not contain surface OH groups, but the mechanism of their formation is different. On ZnO, ethoxy groups are formed by the reaction of ethanol with surface oxygens. The presence of ethoxyls on ZnO decreases the basicity because some surface oxygens are already engaged in the bonding of ethoxyl groups. The effect of ammonia adsorption on basicity is different for each oxide. For Ga2O3, ammonia adsorption increases the basicity of neighbouring oxygen sites. Ammonia is not adsorbed on MgO; therefore, it does not change the basicity of this oxide. Ammonia adsorbed on ZnO forms coordination bonds with Zn sites; it does not change the number of basic sites but changes how carbonate species are bonded to surface sites. Full article
(This article belongs to the Special Issue Zeolite: A Strategic Materials for Sustainable Chemistry and Future Energy)
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13 pages, 2707 KiB  
Article
Enhanced CH4/N2 Separation Efficiency of UiO-66-Br2 through Hybridization with Mesoporous Silica
by Hu Wang, Ziao Zong, Yadong Zhou, Chaochuang Yin, Yizhu Lei, Renshu Wang, Yuheng Deng and Tingting Wu
Molecules 2024, 29(12), 2750; https://doi.org/10.3390/molecules29122750 - 9 Jun 2024
Viewed by 515
Abstract
Efficient separation of CH4 from N2 is essential for the purification of methane from nitrogen. In order to address this problem, composite materials consisting of rod-shaped SBA-15-based UiO-66-Br2 were synthesized for the purpose of separating a CH4/N2 [...] Read more.
Efficient separation of CH4 from N2 is essential for the purification of methane from nitrogen. In order to address this problem, composite materials consisting of rod-shaped SBA-15-based UiO-66-Br2 were synthesized for the purpose of separating a CH4/N2 mixture. The materials were characterized via PXRD, N2 adsorption–desorption, SEM, TEM, FT-IR, and TGA. The adsorption isotherms of CH4 and N2 under standard pressure conditions for the composites were determined and subsequently compared. The study revealed that the composites were formed through the growth of MOF nanocrystals on the surfaces of the SBA-15 matrix. The enhancements in surface area and adsorption capacity of hybrid materials were attributed to the structural modifications resulting from the interactions between surface silanol groups and metal centers. The selectivity of the composites towards a gas mixture of CH4 and N2 was assessed utilizing the Langmuir adsorption equation. The results of the analysis revealed that the U6B2S5/SBA-15 sample exhibited the greatest selectivity for CH4/N2 adsorption compared to the other samples, with an adsorption selectivity parameter (S) of 20.06. Additional research is necessary to enhance the enrichment of methane from CH4/N2 mixtures using SBA-15-based metal-organic framework materials. Full article
(This article belongs to the Special Issue Zeolite: A Strategic Materials for Sustainable Chemistry and Future Energy)
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12 pages, 2115 KiB  
Article
Physical Grinding of Prefabricated Co3O4 and MCM-22 Zeolite for Fischer–Tropsch Synthesis: Impact of Pretreatment Procedure on the Dispersion and Catalytic Performance
by Hua-** Ren, Zhi-**a **e, Shao-Peng Tian, Si-Yi Ding, Qiang Ma, Yu-Zhen Zhao, Zhe Zhang, Jiao-Jiao Fu and Qing-Qing Hao
Molecules 2024, 29(6), 1283; https://doi.org/10.3390/molecules29061283 - 14 Mar 2024
Viewed by 650
Abstract
To improve the mess-specific activity of Co supported on zeolite catalysts in Fischer–Tropsch (FT) synthesis, the Co-MCM-22 catalyst was prepared by simply grinding the MCM-22 with nanosized Co3O4 prefabricated by the thermal decomposition of the Co(II)-glycine complex. It is found [...] Read more.
To improve the mess-specific activity of Co supported on zeolite catalysts in Fischer–Tropsch (FT) synthesis, the Co-MCM-22 catalyst was prepared by simply grinding the MCM-22 with nanosized Co3O4 prefabricated by the thermal decomposition of the Co(II)-glycine complex. It is found that this novel strategy is effective for improving the mess-specific activity of Co catalysts in FT synthesis compared to the impregnation method. Moreover, the ion exchange and calcination sequence of MCM-22 has a significant influence on the dispersion, particle size distribution, and reduction degree of Co. The Co-MCM-22 prepared by the physical grinding of prefabricated Co3O4 and H+-type MCM-22 without a further calcination process exhibits a moderate interaction between Co3O4 and MCM-22, which results in the higher reduction degree, higher dispersion, and higher mess-specific activity of Co. Thus, the newly developed method is more controllable and promising for the synthesis of metal-supported catalysts. Full article
(This article belongs to the Special Issue Zeolite: A Strategic Materials for Sustainable Chemistry and Future Energy)
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