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Special Issue "10th Anniversary of Inorganics: Inorganic Solid State Chemistry"

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A special issue of Inorganics (ISSN 2304-6740). This special issue belongs to the section "Inorganic Solid-State Chemistry".

Deadline for manuscript submissions: 31 October 2023 | Viewed by 3603

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Special Issue Editors

Prof. Dr. Richard Dronskowski

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Chair of Solid-State and Quantum Chemistry, RWTH Aachen University, D-52056 Aachen, Germany
Interests: quantum chemistry; solid-state chemistry; solid-state physics; crystallography
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Prof. Dr. Christian Julien

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Campus Pierre et Marie Curie, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, CNRS UMR 7590, 4 Place Jussieu, 75005 Paris, France
Interests: energy storage; solid-state ionics; lithium batteries; thin films
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Prof. Dr. Rainer Niewa

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Institut für Anorganische Chemie, Universität Stuttgart, 70569 Stuttgart, Germany
Interests: solid state chemistry; materials chemistry; synthesis; crystal growth; structure-property relationships
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Prof. Dr. Guido Kickelbick

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Inorganic Solid-State Chemistry, Saarland University, Campus Building C4.1, 66123 Saarbrücken, Germany
Interests: inorganic-organic interface; materials characterization; nanomaterials; polymers; nanoparticle synthesis; mechanochemistry; continuous production of compounds
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Dr. Alexander S. Novikov

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Institute of Chemistry, Saint Petersburg State University, Universitetskii pr., 26, Petergof, 198504 St. Petersburg, Russia
Interests: quantum and computational chemistry; inorganic and coordination chemistry; organometallic chemistry; organic chemistry; catalysis; non-covalent interactions; machine learning and artificial intelligence in chemistry
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Prof. Dr. Gary Hix

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Wolverhampton School of Sciences, Faculty of Science and Engineering, Wolverhampton University, Wulfruna Street, Wolverhampton WV1 1LY, UK
Interests: solid state chemistry; materials chemistry; metal phosphonates; luminescence; antimicrobial materials; photonic materials; MOFs; functional oxides; zeolites

Prof. Dr. Hans-Conrad zur Loye

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Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208, USA
Interests: synthesis of new hierarchical wasteform materials for the effective immobilization of nuclear waste in persistent architectures; crystal growth of oxides, fluorides, chalcogenides; luminescing and scintillating materials

Special Issue Information

Dear Colleagues,

It is not at all surprising that solid state chemistry, a key pillar of inorganic chemistry, has grown enormously within the last decade, and there is significant progress not only in synthesis, structure, and properties of solid phase materials, in particular but not restricted to non-molecular solids. As solid state chemistry is inextricably linked to and strongly overlaps with solid-state physics, mineralogy, crystallography, ceramics, metallurgy, thermodynamics, materials science, and electronics, plenty of novel findings are happening at the contact line, with a strong emphasis on the synthesis of novel materials and their characterization. Not only has significant progress been made in melt methods, solution methods, and gas reactions, characterization of crystalline and amorphous solid-state materials has improved quite a lot. And let’s not forget that there is an increasing influence of theory, so theoretical chemistry targeting the solid state, computer modeling and artificial intelligence are currently supporting the busy solid state chemists in their daily work. Finally, there is a plethora of exciting applications in which solid-state compounds play a decisive role. This Special Issue dedicated to 10th Anniversary of Inorganics focuses on Inorganic Solid State Chemistry. Both experimental and theoretical studies, fundamental and applied research manuscripts (original research articles and comprehensive review papers ) are very much welcomed for consideration. We therefore invite all solid-state researchers worldwide to contribute their research to our Special Issue, dedicated to the 10^th anniversary of Inorganics.

Prof. Dr. Richard Dronskowski
Prof. Dr. Christian Julien
Prof. Dr. Rainer Niewa
Prof. Dr. Guido Kickelbick
Dr. Alexander S. Novikov
Prof. Dr. Gary Hix
Prof. Dr. Hans-Conrad Zur Loye
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. Inorganics 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 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

solid-state synthesis
solid-state characterization
solid-state properties
solid-state theory
solid-state applications

Published Papers (5 papers)

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Research

Open AccessArticle

Synthesis of High-Crystallinity Mg-Al Hydrotalcite with a Nanoflake Morphology and Its Adsorption Properties for Cu²⁺ from an Aqueous Solution

and

Inorganics 2023, 11(9), 369; https://doi.org/10.3390/inorganics11090369 - 15 Sep 2023

Viewed by 342

Abstract

A magnesium–aluminum-layered double hydroxide (Mg-Al LDH) with a nano-lamellar morphology was prepared by using a homogeneous precipitation and hydrothermal method, and a calcination product (Mg-Al LDO) of the Mg-Al LDH was also obtained in this work. The XRD, TEM, SEM, FTIR, N₂ ad/desorption, and TG-DTG techniques were employed to characterize the microstructures, morphologies, and thermostability levels of these two materials in detail. The results showed that both the Mg-Al LDH and Mg-Al LDO had mesoporous structures and nanoplate morphologies, with diameters of 50~200 nm. The Mg-Al LDH was transformed into Mg-Al LDO at 773 K in an air atmosphere. The adsorption properties of the Mg-Al LDH were investigated systematically with a copper chloride solution as a simulated waste. The experimental results demonstrated that the pH value of the solution had an obvious influence on its Cu²⁺ adsorption capacity, and the optimal pH value was approximately 5.0. The adsorption kinetics results showed that the Mg-Al LDH had a rapid adsorption rate, and the equilibrium adsorption capacity was 62.11 mg/g. Additionally, the Cu²⁺ adsorption could be commendably described using a pseudo-second-order model, demonstrating that the adsorption behavior is regulated by chemical sorption. The adsorption thermodynamic results indicated that the adsorption process was spontaneous at temperatures above 318 K. Moreover, the ΔG⁰ values decreased as the temperature was raised, which indicated that a higher temperature can cause a greater impetus for Cu²⁺adsorption. In addition, the positive values of the ΔH⁰ indicated that the Cu²⁺ adsorption was endothermic, and the positive ΔS⁰ values revealed an increase in the confusion at the solid–liquid interface of the adsorbent. Full article

(This article belongs to the Special Issue 10th Anniversary of Inorganics: Inorganic Solid State Chemistry)

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Open AccessArticle

Study of the Cathode Pt-Electrocatalysts Based on Reduced Graphene Oxide with Pt-SnO₂ Hetero-Clusters

Dmitry D. Spasov

Nataliya A. Ivanova

Ruslan M. Mensharapov

Elizaveta S. Kulikova

and

Vladimir N. Fateev

Inorganics 2023, 11(8), 325; https://doi.org/10.3390/inorganics11080325 - 31 Jul 2023

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Abstract

A complex study of the structure, morphology, and electrochemical properties of the Pt²⁰/SnO₂¹⁰/RGO electrocatalyst is presented. The advantage of the chemical synthesis of reduced graphene oxide (c-RGO) compared to thermal methods (t-RGO) is due to the formation of graphene plates with amorphous carbon black agglomerates and the chemical composition of the surface. The nature of the interaction between platinum and tin dioxide particles and a conclusion about the formation of heterostructures Pt-SnO₂ with the surface interaction of lattices excluding the formation of hetero phases has been established. This achieves high dispersity during the formation of platinum particles without significant agglomeration and increases the electrochemical surface area (ESA) of platinum to 85 m² g⁻¹ vs. carbon black. In addition, the surface interaction of particles and the formation of hetero-clusters Pt-SnO₂ can cause the improved activity and stability of the Pt²⁰/SnO₂¹⁰/c-RGO electrocatalyst. Full article

(This article belongs to the Special Issue 10th Anniversary of Inorganics: Inorganic Solid State Chemistry)

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Open AccessArticle

Synthesis, Luminescence and Energy Transfer Properties of Ce³⁺/Mn²⁺ Co-Doped Calcium Carbodiimide Phosphors

Erwan Leysour de Rohello

Yan Suffren

Francis Gouttefangeas

Odile Merdrignac-Conanec

Olivier Guillou

and

François Cheviré

Inorganics 2023, 11(7), 291; https://doi.org/10.3390/inorganics11070291 - 07 Jul 2023

Viewed by 476

Abstract

Ce³⁺-doped and Ce³⁺/Mn²⁺ co-doped calcium carbodiimide (CaCN₂) phosphors were synthesized from doped calcium carbonate and carbon nitride by a solid-state reaction at 700 °C under flowing NH₃ using a very short reaction time (1 h). The samples were characterized by powder X-ray diffraction, scanning electron microscopy and their diffuse reflectance and luminescence properties were investigated. Single-doped CaCN₂:Ce³⁺ exhibits a blue emission under near-ultraviolet activation (386 nm) corresponding to the 5d¹ → ²F_5/2 and 5d¹ → ²F_7/2 transitions of Ce³⁺. Maximum emission is obtained at temperatures lower than 150 K and then progressively decreases up to 387 K, with an 80% drop in the emission at room temperature. Efficient energy transfers from Ce³⁺ to Mn²⁺ via a non-radiative dipole–dipole mechanism are evidenced for the co-doped samples, leading to various colored phosphors under near-ultraviolet activation (386 nm). The emission color of the obtained phosphors can be modulated from blue to red through a shade of white depending on the sensitizer/activator ratio. Full article

(This article belongs to the Special Issue 10th Anniversary of Inorganics: Inorganic Solid State Chemistry)

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Open AccessArticle

Crystal Structure and XPS Study of Titanium-Substituted M-Type Hexaferrite BaFe_12−xTi_xO₁₉

Kim-Isabelle Mehnert

Manuel Häßner

Yanina Mariella Dreer

Indro Biswas

and

Rainer Niewa

Inorganics 2023, 11(5), 207; https://doi.org/10.3390/inorganics11050207 - 10 May 2023

Viewed by 910

Abstract

The M-type barium hexaferrite substituted with titanium, BaFe

_{12 - x}

_{x}

_{19}

, was synthesized from sodium carbonate flux and the obtained single crystals with a maximum degree of substitution of up to about x = 0.9 were characterized. XPS [...] Read more.

The M-type barium hexaferrite substituted with titanium, BaFe

_{12 - x}

_{x}

_{19}

, was synthesized from sodium carbonate flux and the obtained single crystals with a maximum degree of substitution of up to about x = 0.9 were characterized. XPS measurements were carried out for the identification of side products and in particular in order to assign the valence states of the transition-metal constituents. Due to the aliovalent exchange of iron(III) with titanium(IV), an additional charge balance needs to occur. No titanium(III) was detected, while the amount of iron(II) increased in the same order of magnitude as the amount of titanium(IV); thus, the major charge balancing is attributed to the reduction of iron(III) to iron(II). According to the XPS data, the amount of titanium(IV) typically is slightly higher than that of iron(II). This is in line with a tendency to a minor formation of vacancies on the transition-metal sites becoming more important at higher substitution levels according to PXRD and WDS measurements, completing the picture of the charge-balance mechanism. XRD taken on single crystals indicates the distribution of titanium and vacancies over three of the five transition-metal sites. Full article

(This article belongs to the Special Issue 10th Anniversary of Inorganics: Inorganic Solid State Chemistry)

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Open AccessArticle

Isostructural Oxides Sr₃Ti_2−xM_xO_7−δ (M = Mn, Fe, Co; x = 0, 1) as Electrocatalysts for Water Splitting

Chandana C. W. Kananke-Gamage

and

Farshid Ramezanipour

Inorganics 2023, 11(4), 172; https://doi.org/10.3390/inorganics11040172 - 19 Apr 2023

Viewed by 838

Abstract

The correlation of the electrocatalytic activity with electrical conductivity, oxygen-vacancies, and electronegativity have been studied in a series of isostructural oxides, having the so-called Ruddlesden-Popper structure. The structures of these materials comprise transition metals that are octahedrally coordinated to form a network of bilayer stacks. These materials are catalytically active for both half-reactions of water-splitting, namely oxygen-evolution reaction (OER) and hydrogen-evolution reaction (HER). They show a systematic increase in electrocatalytic activity in progression from Sr₃Ti₂O₇ to Sr₃TiMnO₇, Sr₃TiFeO_7−δ, and Sr₃TiCoO_7−δ. The kinetic studies using the Tafel method indicate the same trend across the series, where the best catalyst also has the fastest kinetics for both HER and OER. In addition, the same progression is observed in the concentration of oxygen-vacancies, as well as the electrical conductivity in a wide range of temperatures, 25 °C–800 °C. The material that shows the best electrocatalytic activity, i.e., Sr₃TiCoO_7−δ, also has the highest electrical conductivity and the greatest concentration of oxygen vacancies in the series. The correlations observed in this work indicate that trends in electrocatalytic performance may be related to the systematic increase in electrical conductivity, electronegativity, and oxygen-vacancies, as well as the electron occupancy of e_g orbitals, which can affect the strength of sigma interactions between the catalyst and reaction intermediates. Full article

(This article belongs to the Special Issue 10th Anniversary of Inorganics: Inorganic Solid State Chemistry)

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