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Analysis and Characterization of Materials in Chemistry

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

Deadline for manuscript submissions: 31 October 2024 | Viewed by 3926

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Special Issue Editor

Dr. Qingming Huang

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Guest Editor

Fujian College Association Instrumental Analysis Center, Fuzhou University, Fuzhou 350002, China
Interests: structure analysis and characterization; interface and surface structure; structure and catalysis; microstructure and luminescence; structure and photoelectric property; structure and spectral simulation

Special Issue Information

Dear Colleagues,

Materials science has made remarkable progress in recent decades, especially in photoelectric, semiconductor, nanomaterials, biological materials, AI materials, energy and catalytic materials, etc. The development of novel high-performance materials has benefited from newly discovered mechanistic relationships between microstructures and properties through innovative analysis and characterization techniques.

Therefore, progress regarding the methods and technology used in the analysis and characterization of materials is the dynamic source of the development of new materials or innovative applications of traditional materials. Recently, researchers and their institutes have attached great importance to the development of instruments, methods and technology for analysis and characterization to achieve innovation in materials science, such as the development of great scientific apparatus, innovative characterization experimental devices, combined preparation and characterization techniques, innovative methods of sample preparation, spectral characterization and simulation, in situ preparation and characterization, in situ reaction and characterization, the innovative application of traditional characterization methods, etc.

In that context, this Special Issue is open to innovative research on the characterization technology and analysis methods used in materials science and the description of novel devices, methods and applications of characterization and analysis technology related to materials.

Dr. Qingming Huang
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 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

characterization method
analysis and simulation
in situ
innovation application of characterization
combined characterization

Published Papers (4 papers)

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Research

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17 pages, 4117 KiB

Open AccessArticle

A Six-Year Hydration Evaluation of Cs-Bearing Materials at Room Temperature and 55% Relative Humidity Simulating Radioactive Waste with Different Crystallinities

by Guido Cerri and Antonio Brundu

Molecules 2024, 29(6), 1302; https://doi.org/10.3390/molecules29061302 - 14 Mar 2024

Viewed by 471

Abstract

Radioactive wastes often contain amorphous and crystalline phases, and vapor hydration can affect their durability. In this study, Cs-clinoptilolite was heated (at 1100 °C and for 2–36 h) to prepare the samples that were composed mainly of an amorphous phase (AmP) and CsAlSi₅O₁₂ (≥94%) with minor CsAlSi₂O₆. Six samples with an AmP/CsAlSi₅O₁₂ ratio from 26.5 to 0.1 were kept at 21 °C and 55% relative humidity, and their hydration was measured via thermogravimetry (TG) over a period of almost six years. The hydration that resulted was directly related to the AmP quantity. The increase in water content followed a logarithmic trend over time. It reached 1.95% in the AmP-richest material, while it attained only 0.07% in the most crystalline sample. The hydrolysis of the AmP led to an increase over time in the tightly bound water. Samples with an AmP of ≤19% demonstrated slightly higher durability due to the lower Cs content in the AmP. Full article

(This article belongs to the Special Issue Analysis and Characterization of Materials in Chemistry)

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10 pages, 4573 KiB

Open AccessArticle

Facile Synthesis of Nd₂Fe₁₄B Hard Magnetic Particles with Microwave-Assisted Hydrothermal Method

by Ling Wang and Xiaofen Xu

Molecules 2023, 28(23), 7918; https://doi.org/10.3390/molecules28237918 - 03 Dec 2023

Viewed by 703

Abstract

The synthesis of Nd-Fe-B magnetic powders via chemical techniques presents significant promise, but poses challenges due to their inherent chemical instability. In this investigation, Nd-Fe-B hard magnetic particles were synthesized utilizing an eco-friendly and simple microwave-assisted hydrothermal synthetic method. The technique involves the synthesis of the Nd-Fe-B oxide precursor using the microwave-assisted hydrothermal method, followed by reduction–diffusion using CaH₂. The microwave-assisted hydrothermal technique presents a viable approach for preparing Nd-Fe-B precursor particles, offering advantages such as time and energy efficiency and environmental sustainability. The synthesized Nd-Fe-B particles demonstrated a coercivity of up to 2.3 kOe. These magnetic particles hold significant potential for use in high-performance permanent magnets, and can effectively contribute to developing high-energy density exchange-coupled nanocomposite magnets. This study also offers valuable insights into the design and synthesis of additional magnetic materials based on rare earth elements. Full article

(This article belongs to the Special Issue Analysis and Characterization of Materials in Chemistry)

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16 pages, 12315 KiB

Open AccessArticle

Comparison of Homo-Polyimide Films Derived from Two Isomeric Bis-Benzimidazole Diamines

by Meng Lian, Feng Zheng, Lingbin Meng, Fei Zhao, Jun Liu, Jimei Song and Qinghua Lu

Molecules 2023, 28(13), 4889; https://doi.org/10.3390/molecules28134889 - 21 Jun 2023

Cited by 1 | Viewed by 1013

Abstract

Heteroaromatic polyimides (PIs) containing benzimidazole have attracted tremendous attention due to their positive impact on the properties of PIs. Some research on PIs containing 4,4′-[5,5′-bi-1H-benzimidazole]-2,2′-diylbis-benzenamine (4-AB) has been reported. However, reports are lacking on homo-polyimides (homo-PIs) containing 3,3′-[5,5′-bi-1H-benzimidazole]-2,2′-diylbis-benzenamine (3-AB), which is one of the isomers of 4-AB. In this paper, the influence of amino groups’ positions on the performance of homo-PIs was investigated. It was found that the net charge of the amine N group in 4-AB was lower than that of 3-AB, resulting in higher reactivity of 4-AB. Consequently, PIs containing 4-AB displayed better mechanical performance. Molecular simulation confirmed that 3-AB and its corresponding PI chain exhibited distorted conformation, leading to the PI films containing 3-AB having a lighter color. In addition, the 3-AB structure was calculated to have higher rotational energy compared to 4-AB, resulting in a higher glass transition temperature (T_g) in PIs prepared from 3-AB. On the other hand, PIs containing 4-AB exhibited a higher level of molecular linearity, leading to a lower coefficient of thermal expansion (CTE) compared to PIs prepared from 3-AB. Furthermore, all PIs showed higher thermal stability with a 5% weight loss temperature above 530 °C and T_g higher than 400 °C. Full article

(This article belongs to the Special Issue Analysis and Characterization of Materials in Chemistry)

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Review

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17 pages, 3477 KiB

Open AccessReview

The Promotion of Research Progress of Zinc Manganate Cathode Materials for Zinc-Ion Batteries by Characterization and Analysis Technology

by Xin Meng, Ziyi Cheng and Le Li

Molecules 2023, 28(11), 4459; https://doi.org/10.3390/molecules28114459 - 31 May 2023

Viewed by 1373

Abstract

Zinc-ion batteries (ZIBs) have recently attracted great interest and are regarded as a promising energy storage device due to their low cost, environmental friendliness, and superior safety. However, the development of suitable Zn-ion intercalation cathode materials remains a great challenge, resulting in unsatisfactory ZIBs that cannot meet commercial demands. Considering that spinel-type LiMn₂O₄ has been shown to be a successful Li intercalation host, spinel-like ZnMn₂O₄ (ZMO) is expected to be a good candidate for ZIBs cathodes. This paper first introduces the zinc storage mechanism of ZMO and then reviews the promotion of research progress in improving the interlayer spacing, structural stability, and diffusivity of ZMO, including the introduction of different intercalated ions, introduction of defects, and design of different morphologies and in combination with other materials. The development status and future research directions of ZMO-based ZIBs characterization and analysis techniques are summarized. Full article

(This article belongs to the Special Issue Analysis and Characterization of Materials in Chemistry)

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