Share This Special Issue

Special Issue Editors

Special Issue Information

Dear Colleagues,

Nanotechnology is a science with relatively short, but very dynamic development in the last few decades. Its intensive growth is primarily related to the possibility of improving the quality of people's daily lives, as well as numerous processes commonly used in industry. Nanotechnology owes its universality to the combination of such sciences as physics, chemistry, and biology. This enables its application in medicine, electronics, or material engineering. From this perspective, it becomes important to develop nanostructured materials, especially with the possibility of their controlled preparation. This allows obtaining the appropriate structure and specific physicochemical parameters of the final products for various purposes, such as catalysis.

In this Special Issue on the synthesis and modification of new nanomaterials, we invite you to submit papers on both the synthesis and modification of new nanomaterials.

Dr. Agnieszka Feliczak-Guzik
Prof. Dr. Izabela Nowak
Guest Editors

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. International Journal of Molecular Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. There is an Article Processing Charge (APC) for publication in this open access journal. For details about the APC please see here. 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.

Published Papers (1 paper)

Order results

Result details

Show export options Show export options

Select all

Export citation of selected articles as:

Research

25 pages, 3522 KiB

Open AccessArticle

KIT-5 Structural and Textural Changes in Response to Different Methods of Functionalization with Sulfonic Groups

by Sylwia Chałupniczak, Izabela Nowak and Agata Wawrzyńczak

Int. J. Mol. Sci. 2023, 24(3), 2165; https://doi.org/10.3390/ijms24032165 - 21 Jan 2023

Cited by 2 | Viewed by 1225

Abstract

In this project, KIT-5 materials were effectively functionalized with sulfonic groups introduced by grafting or the co-condensation method and tested as heterogeneous solid acid catalyst. A co-condensation procedure leading to the stable, –SO₃H functionalized KIT-5 materials was successfully established. Moreover, the influence of both synthesis methods on the structural and textural parameters, as well as surface chemistry, morphology, and catalytic activity of –SO₃H/KIT-5 materials was thoroughly investigated. The syntheses with 3-mepkaptopropyltrimethoxysilane (MPTMS) acting as a modifying agent resulted in samples in which functional groups were introduced into the structure and/or onto the mesoporous silica surface. The oxidation stage of –SH to –SO₃H groups was carried out under mild conditions, using a “green” oxidant (H₂O₂). The application of different functionalization techniques and the introduction of different amounts of modifying agent allowed for an evaluation of the influence of these parameters on the ordering of the mesoporous structure of KIT-5 materials. The applied methods of assessment of the physicochemical parameters (XRD, low-temperature N₂ sorption, TEM) showed that, especially when the co-condensation method was applied, as the number of functional groups increased, the ordering of structure characteristic of KIT-5 decreased. On the other hand, the samples modified by grafting had a stable structure, regardless of the amount of introduced MPTMS. Test reactions carried out on the basis of Friedel–Crafts alkylation process showed that the synthesized materials can be considered promising acid catalysts in heterogeneous catalysis reactions. Full article

(This article belongs to the Special Issue Synthesis and Modification of New Nanoporous Materials)

► Show Figures

Journal Menu

Journal Browser

Synthesis and Modification of New Nanoporous Materials

Share This Special Issue

Special Issue Editors

Special Issue Information

Published Papers (1 paper)

Research

Further Information

Guidelines

MDPI Initiatives

Follow MDPI