Special Issue "Sol-Gel Preparation of Nanomaterials"

A special issue of Nanomaterials (ISSN 2079-4991).

Deadline for manuscript submissions: 31 March 2018

Special Issue Editor

Guest Editor
Prof. Dr. Erhard Kemnitz

Full University Professor, Chemistry Department, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, D-12489 Berlin, Germany
Website | E-Mail
Interests: mechanistic aspects of heterogeneously catalysed fluorination reactions, non-aqueous fluorolytic sol–gel synthesis of nanoscopic metal fluorides; nano metal fluorides as solid Lewis acids; nano metal hydroxide fluorides as biacidic Brønsted/Lewis acids and bases; metal fluoride sols for antireflective coating; inorganic–organic hybrid materials based on nano metal fluorides

Special Issue Information

Dear Colleagues,

Nanomaterial chemistry has become an extremely important area of research over the past 20 years. Although many different nanomaterials have already found industrial applications we are still just at the beginning of a new scientific and industrial revolution driven by the advances in nanomaterials science.

Over the past decades, many new synthesis techniques have been developed that give access to the fascinating world of nanomaterials with different chemical and physical properties. The sol-gel synthesis certainly is one of the most powerful synthesis routes in terms of the wide variety of synthesis approaches and technical applications. Especially the classical (aqueous) sol-gel synthesis route, mainly forced by the development of silica, was but still is in the focus of thousands of chemists and materials scientists worldwide.

However, motivated by new developments like atomic layer deposition, ALD, and others, non-aqueous sol-gel synthesis approaches have been developed recently, thus extending the synthesis access toward nanoscopic new materials.

Therefore, it is the intention of the Special Issue of Nanomaterials to present the current state-of-the-art in the sol-gel-based synthesis approaches towards nanomaterials. Characteristic properties and fields of applications of those materials may highlight the potential of these synthesis approaches. On a first glance, there is no restriction on classes of sol-gel formed nanomaterials as well as field of application. Therefore, in the present Special Issue, contributions from leading groups in the field with the aim of giving a balanced view of the current state-of-the-art in the sol-gel-synthesis field are invited.

Prof. Dr. Erhard Kemnitz
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 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. Nanomaterials 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 1200 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

• Sol-Gel Synthesis
• Nanomaterials
• Nanotechnology
• Mechanistic Synthesis Aspects
• Properties
• Applications

Published Papers (2 papers)

View options order results:
result details:
Displaying articles 1-2
Export citation of selected articles as:

Research

Open AccessFeature PaperArticle Sol-Gel Derived Adsorbents with Enzymatic and Complexonate Functions for Complex Water Remediation
Nanomaterials 2017, 7(10), 298; doi:10.3390/nano7100298
Received: 30 August 2017 / Revised: 18 September 2017 / Accepted: 19 September 2017 / Published: 28 September 2017
PDF Full-text (7300 KB) | HTML Full-text | XML Full-text
Abstract
Sol-gel technology is a versatile tool for preparation of complex silica-based materials with targeting functions for use as adsorbents in water purification. Most efficient removal of organic pollutants is achieved by using enzymatic reagents grafted on nano-carriers. However, enzymes are easily deactivated in
[...] Read more.
Sol-gel technology is a versatile tool for preparation of complex silica-based materials with targeting functions for use as adsorbents in water purification. Most efficient removal of organic pollutants is achieved by using enzymatic reagents grafted on nano-carriers. However, enzymes are easily deactivated in the presence of heavy metal cations. In this work, we avoided inactivation of immobilized urease by Cu (II) and Cd (II) ions using magnetic nanoparticles provided with additional complexonate (diethylene triamine pentaacetic acid or DTPA) functions. Obtained nanomaterials were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). According to TGA, the obtained Fe3O4/SiO2-NH2-DTPA nanoadsorbents contained up to 0.401 mmol/g of DTPA groups. In the concentration range Ceq = 0–50 mmol/L, maximum adsorption capacities towards Cu (II) and Cd (II) ions were 1.1 mmol/g and 1.7 mmol/g, respectively. Langmuir adsorption model fits experimental data in concentration range Ceq = 0–10 mmol/L. The adsorption mechanisms have been evaluated for both of cations. Crosslinking of 5 wt % of immobilized urease with glutaraldehyde prevented the loss of the enzyme in repeated use of the adsorbent and improved the stability of the enzymatic function leading to unchanged activity in at least 18 cycles. Crosslinking of 10 wt % urease on the surface of the particles allowed a decrease in urea concentration in 20 mmol/L model solutions to 2 mmol/L in up to 10 consequent decomposition cycles. Due to the presence of DTPA groups, Cu2+ ions in concentration 1 µmol/L did not significantly affect the urease activity. Obtained magnetic Fe3O4/SiO2-NH2-DTPA-Urease nanocomposite sorbents revealed a high potential for urease decomposition, even in presence of heavy metal ions. Full article
(This article belongs to the Special Issue Sol-Gel Preparation of Nanomaterials)
Figures

Open AccessArticle Thermal Conductivity of a Nanoscale Yttrium Iron Garnet Thin-Film Prepared by the Sol-Gel Process
Nanomaterials 2017, 7(9), 247; doi:10.3390/nano7090247
Received: 23 July 2017 / Revised: 28 August 2017 / Accepted: 29 August 2017 / Published: 31 August 2017
PDF Full-text (2288 KB) | HTML Full-text | XML Full-text
Abstract
The thermal conductivity of a nanoscale yttrium iron garnet (Y3Fe5O12, YIG) thin-film prepared by a sol-gel method was evaluated using the ultrafast pump-probe technique in the present study. The thermoreflectance change on the surface of a 250
[...] Read more.
The thermal conductivity of a nanoscale yttrium iron garnet (Y3Fe5O12, YIG) thin-film prepared by a sol-gel method was evaluated using the ultrafast pump-probe technique in the present study. The thermoreflectance change on the surface of a 250 nm thick YIG film, induced by the irradiation of femtosecond laser pulses, was measured, and curve fitting of a numerical solution for the transient heat conduction equation to the experimental data was performed using the finite difference method in order to extract the thermal property. Results show that the film’s thermal conductivity is 22–83% higher than the properties of bulk YIG materials prepared by different fabrication techniques, reflecting the microstructural characteristics and quality of the film. Full article
(This article belongs to the Special Issue Sol-Gel Preparation of Nanomaterials)
Figures

Planned Papers

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.

Title: Non‐aqueous sol‐gel synthesis of FePt nanoparticles
in absence of in situ stabilizers
Author: Tobias Preller*,†, Dirk Menzel∥, J. Cedric Porsiel†, Bilal Temel†, Georg Garnweitner*,†
Abstract: The synthesis of FePt nanocrystals is typically performed in an organic solvent at comparably high
temperatures, requiring the usage of the in situ stabilizers oleic acid and oleylamine to produce
monomodal particles with well‐defined morphologies. By the replacement of the typically used
solvents by organic media bearing functional moieties, the use of the stabilizer can be omitted.
Furthermore, various morphologies and sizes of the nanocrystals as well as an excess of iron or
platinum atoms at the particle surface can be adjusted by the choice of organic solvent. Thus, the
kinetics of particle growth and the change in the magnetic behavior of the FePt nanocrystals during
the synthesis with the different solvents as well as the resulting morphologies of the nanoparticles
were determined by a variety of analytical methods.

Journal Contact

MDPI AG
Nanomaterials Editorial Office
St. Alban-Anlage 66, 4052 Basel, Switzerland
E-Mail: 
Tel. +41 61 683 77 34
Fax: +41 61 302 89 18
Editorial Board
Contact Details Submit to Special Issue Edit a special issue Review for Nanomaterials
logo
loading...
Back to Top