Special Issue "Advances in Porous Materials"
Deadline for manuscript submissions: 31 August 2019
Porous materials distribute widely and act as very important roles in each field. Especially, porous materials have various characteristics depending on pore size, surface property of the pore wall, pore array and local structure of the pore wall, and can be used as adsorbents, separators, thermal insulators, acoustic absorbents, photonics, their electric properties, and so on. Accordingly, papers on porous materials are dispersed in many fields, and, unfortunately, many common hints for synthesis and the characteristics of porous materials are scattered. Therefore, this Special Issue invites the submission of works related to porous materials and their applications in many fields. To prepare appropriate porous materials for each purpose, the Special Issue may be very useful for the readers. For the authors, the issue will be a good opportunity for publication after peer review by expert researchers of porous materials. Review articles by experts in the field will also be welcome.
Prof. Takei Takahiro
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 papers will be 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 1800 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.
- microporous and mesoporous materials
- molecular sieve
- thermal insulator
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Author: N. Kadam, Md. Moniruzzaman, Sang-Wha Lee*
Title: Dual functional S-doped g-C3N4 pinhole porous nanosheets for selective fluorescence sensing of Ag+ and enhanced photocatalytic degradation of cationic dyes
Abstract: This study explores the one-pot template free synthesis of S-doped g-C3N4 pinhole nanosheets (SCNPNS) for fluorescence sensing of Ag+ ions and enhanced photocatalytic degradation of cationic dyes under visible light. As-synthesized SCNPNS were subsequently characterized by various analytical tools such as XRD, FT-IR, TEM, XPS, and UV-vis spectroscopy. At optimal conditions, the detection linear range for Ag+ was found to be from 0 to 1000 nM, with a detection limit (LOD) of 57 nM. The sensing system of SCNPNS is highly sensitive and selective detection of Ag+ due to its fluorescence quenching via photoinduced electron transfer through Ag+ combined SCNPNS. Moreover, the SCNPNS exhibited 90% degradation for cationic methylene blue (MB) dye within 180 min but only 14% degradation for anionic methyl orange (MO) dye under visible light irradiation. The enhanced photocatalytic activity of the SCNPNS was attributed to its negative zeta potential for electrostatic attraction with cationic dye and the pinhole porous structure that results in a faster transfer of the charge carrier on the surface. After all, our SCNPNS is endorsed as an environmental safety tool due to several advantages, such as low cost, easy preparation, selective recognition of Ag+ ions, and efficient photocatalytic degradation of cationic dyes under visible light.
Keywords: S-doped g-C3N4; Pinhole porous nanosheet; Ag+ ions; fluorescence sensing; Visible light; Photocatalytic degradation; Cationic dyes
Authors: WILFRIED SCHRANZ and VIKTOR SOPRUNYUK
Affiliation：Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Wien, Austria
Title：WATER IN NANO-POROUS CONFINEMENT: GLASS-TO-LIQUID TRANSITION OR FREEZING OF MOLECULAR REORIENTATION DYNAMICS?
Abstract: First mechanical relaxation measurements (f = 400 Hz) of water confined in micro-porous silica have been performed more than 40 years ago. The authors reported a so called “capillary transition” of water in the core of the pores and a second one at lower temperature, which they called the “adsorbate transition” related to water near the surface of the pores. The “capillary transition” was identified with freezing of water in the centre of the pores, but even 40 years later, the origin of the “adsorbate transition” is not yet clear. One group of authors relates it to the glass-to-liquid transition of a thin film (few layers) of supercooled water in the pores, and another one to a freezing of proton reorientations at lattice defects. In the present work we show data from extensive DMA measurements (f = 0.1 Hz – 70 Hz) of water confined in nanoporous silica (d = 2.5, 5 and 10 nm), which are in favour of the glass-to-liquid scenario.
Authors: T. Wejrzanowski1, K. Cwieka1, J. Skibinski1, S. Haj Ibrahim1, A. Lysik1, J. Milewski2
Affiliation: 1Warsaw University of Technology, Faculty of Materials Science and Engineering Woloska 141, 02507 Warsaw, Poland
2Warsaw University of Technology, Institute of Heat Engineering, Nowowiejska 21/25, 00665 Warsaw, Poland
Title: Microstructure of open-porous materials for high temperature catalysis
Abstract: Open-porous materials combine both structural and functional properties in various applications. This can be especially seen in materials for catalysis, where mechanical strength, transport of reagents and surface reactivity are optimized by the design of microstructure and chemical composition.
Present studies are dedicated to high temperature fuel cells, namely Molten Carbonate Fuel Cells (MCFC) and Solid Oxide Fuel Cells (SOFC), which operate at temperature above 600°C. Due to such conditions they exhibit high tolerance to the fuel type and impurities, but in particular, low cost catalytic materials (Noble metal free) can be applied.
The comprehensive design of high temperature fuel cell materials encompasses the optimization of both: chemical composition and microstructure. Since the chemical composition influences corrosion resistance and catalytic activity of the surface, the microstructure is crucial when the transport and interaction/exchange of gas molecules, electrons and ions are considered.
Within these studies a deeper insight into the understanding of the influence of porosity, pore size distribution, specific surface area and other microstructure parameters on the performance of fuel cells is achieved at by the complementary application of advanced experimental techniques and numerical simulations.