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State-of-the-Art Materials Science in China
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State-of-the-Art Materials Science in China

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: closed (20 July 2022) | Viewed by 11878

Special Issue Editors

Prof. Dr. Chunxu Pan

E-Mail Website
Guest Editor
School of Physics and Technology, Wuhan University, 299 Bayi Rd, Wuhan 430072, China
Interests: carbon nanomaterials; energy materials; photocatalytic materials; ancient bronzes and other related materials
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Yue Li Liu

E-Mail Website
Guest Editor
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Interests: quantumd dots; photocatalytic materials; 2D materials; covalent organic frameworks (COF); solar cells; gas sensors
Prof. Dr. Zhimei Sun

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Beihang University, Beijing 100191, China
Interests: computational materials science; chalcogenide semiconductors; thermoelectric materials; 2D transition metal carbides/nitrides/borides
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Hao Bin Wu

grade E-Mail Website
Guest Editor
School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
Interests: electrochemical energy storage; electrocatalysis; nanostructured materials; batteries; electrochemical capacitors; fuel cells; electrosynthesis; nanocomposites; heterostructures

Special Issue Information

Dear Colleagues,

The contributions of Chinese scientists to the field of materials science and engineering have been of great significance not only in basic research but also in industrial manufacturing. In fact, in recent years, China has been producing the second biggest number per year of published papers and granted patents on new materials aspects. With the concerted efforts of Chinese researchers, in addition to traditional materials, there have been world-leading achievements in new materials, such as nanomaterials, graphene-related 2D materials, and green energy materials. Therefore, this Special Issue of Materials is aimed at providing a platform for expressing innovativeness and originality in materials science and engineering, which will represent China's most recent research achievements.

It is our pleasure to invite colleagues to submit original research papers, short communications, or comprehensive reviews on recent developments in materials as per the topics listed below.

The topics of interest include, but are not limited to:

  • Micro-/nanostructured materials
  • Graphene and other 2D materials
  • Advanced metallic materials
  • Advanced polymers
  • Advanced composites
  • Carbon nanomaterials
  • Metal–organic framework-related materials
  • Materials for green energy storages
  • Photocatalytic materials for water splitting, pollution treatment, etc.
  • Quantum dots and applications
  • Materials for high-performance sensors
  • Materials for films and coatings
  • Thermoelectric materials: computational and experimental
  • Topological Insulating materials: computational and experimental

Prof. Dr. Chunxu Pan
Prof. Dr. Yue Li Liu
Prof. Dr. Zhimei Sun
Prof. Dr. Hao Bin Wu
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. Materials 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 2600 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

  • nanomaterials
  • metallic materials
  • polymer
  • composite
  • graphene
  • 2D materials
  • carbon
  • energy materials
  • functional materials
  • computational materials

Published Papers (6 papers)

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Research

13 pages, 9450 KiB  
Article
A Special Ancient Bronze Sword and Its Possible Manufacturing Technique from Materials Science Analysis
by Chi Xie, Chunlin Fu, Sishi Li, Lingmin Liao, Guantao Chen and Chunxu Pan
Materials 2022, 15(7), 2491; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15072491 - 28 Mar 2022
Cited by 3 | Viewed by 2077
Abstract
In this study, it was found that an ancient bronze sword had special microstructures, i.e., a tin (Sn)-rich layer (Sn: 38.51 wt.%), that was around 0.1–0.3 mm in thickness in the bronze substrate (Sn: 18.57 wt.%). This sword was unearthed from the same [...] Read more.
In this study, it was found that an ancient bronze sword had special microstructures, i.e., a tin (Sn)-rich layer (Sn: 38.51 wt.%), that was around 0.1–0.3 mm in thickness in the bronze substrate (Sn: 18.57 wt.%). This sword was unearthed from the same Chu tombs of the “Sword of Gou Jian”, and dated back to the late Spring and Autumn Period (496 BC–464 BC). The experimental and theoretical analyses revealed that (1) the Sn-rich layer exhibited higher microhardness (around 650 HV) than the sword body (around 300 HV); (2) the Sn-rich layer showed a brittle fracture due to the formation of a large amount of α + δ eutectoid, while the sword body was of good toughness due to a large amount of α-Cu solid solution phase; and (3) theoretical calculations of Sn diffusion in the Cu substrate indicated that this Sn-rich layer could have been formed within several hours or several days if the temperature was above 600 °C. Therefore, this sword was proposed to be a novel kind of composite bronze sword, and the possible manufacturing technique was a surface treatment called “dip or wipe tinning” or tin amalgam, which was widely used in the Bronze Age. Technically, this process possesses more advantages than the well-known two-times casting for making the “double-colour” or bi-metallic composite bronze sword. This research showed that the materials processing level was beyond our expectations for ancient China 2500 years ago. Full article
(This article belongs to the Special Issue State-of-the-Art Materials Science in China)
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10 pages, 1849 KiB  
Article
Aging Behavior and Heat Treatment for Room-Temperature CO-Sensitive Pd-SnO2 Composite Nanoceramics
by Fubing Gui, Yong Huang, Menghan Wu, Xilai Lu, Yongming Hu and Wanping Chen
Materials 2022, 15(4), 1367; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15041367 - 12 Feb 2022
Cited by 4 | Viewed by 1301
Abstract
A high long-term stability is crucial for room-temperature gas-sensitive metal oxide semiconductors (MOSs) to find practical applications. A series of Pd-SnO2 mixtures with 2, 5, and 10 wt% Pd separately were prepared from SnO2 and Pd powders. Through pressing and sintering, [...] Read more.
A high long-term stability is crucial for room-temperature gas-sensitive metal oxide semiconductors (MOSs) to find practical applications. A series of Pd-SnO2 mixtures with 2, 5, and 10 wt% Pd separately were prepared from SnO2 and Pd powders. Through pressing and sintering, Pd-SnO2 composite nanoceramics have been successfully prepared from the mixtures, which show responses of 50, 100, and 60 to 0.04% CO-20% O2-N2 at room temperature for samples of 2, 5, and 10 wt% Pd, respectively. The room-temperature CO-sensing characteristics were degraded obviously after dozens of days’ aging for all samples. For samples of 5 wt% Pd, the response to CO was decreased by a factor of 4 after 20 days of aging. Fortunately, some rather mild heat treatments will quite effectively reactivate those aged samples. Heat treatment at 150 °C for 15 min in air tripled the response to CO for a 20 days-aged sample of 5 wt% Pd. It is proposed that the deposition of impurity gases in air on Pd in Pd-SnO2 composite nanoceramics has resulted in the observed aging, while their desorption from Pd through mild heat treatments leads to the reactivation. More studies on aging and reactivation of room-temperature gas sensitive MOSs should be conducted to achieve high long-term stability for room-temperature MOS gas sensors. Full article
(This article belongs to the Special Issue State-of-the-Art Materials Science in China)
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20 pages, 5819 KiB  
Article
A Finite Element Analysis of the Effects of Graphene and Carbon Nanotubes on Thermal Conductivity of Co Phase in WC–Co Carbide
by Zhengwu Li, Wenkai Xiao and Xuefeng Ruan
Materials 2021, 14(24), 7656; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14247656 - 12 Dec 2021
Cited by 1 | Viewed by 2100
Abstract
In engineering practice, the service life of cemented carbide shield tunneling machines in uneven soft and hard strata will be seriously reduced due to thermal stress. When carbon nanotubes (CNTs) and graphene nano-platelets (GNPs) are added to WC–Co carbide as enhanced phases, the [...] Read more.
In engineering practice, the service life of cemented carbide shield tunneling machines in uneven soft and hard strata will be seriously reduced due to thermal stress. When carbon nanotubes (CNTs) and graphene nano-platelets (GNPs) are added to WC–Co carbide as enhanced phases, the thermal conductivity of carbide is significantly improved. Research should be performed to further understand the mechanism of enhancement in composites and to find ways to assist the design and optimization of the structure. In this paper, a series of finite element models were established using scripts to find the factors that affect the thermal conduction, including positions, orientations, interface thermal conductivity, shapes, sizes, and so on. WC–Co carbide with CNTs (0.06%, 0.12%, and 0.18% vol.), GNPs (0.06%, 0.12%, and 0.18% vol.) and hybrid CNTs–GNPs (1:1) were prepared to verify the reliability of finite element simulation results. The results show that the larger the interface thermal conductivity, the higher the composite phase thermal conductivity. Each 1%vol of CNTs increased the thermal conductivity of the composite phase by 7.2%, and each 1% vol. of GNPs increased the thermal conductivity of the composite phase by 5.2%. The proper curvature (around 140°) of CNTs and GNPs with a proper diameter to thickness ratio is suggested to lead to better thermal conductivity. Full article
(This article belongs to the Special Issue State-of-the-Art Materials Science in China)
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10 pages, 2528 KiB  
Article
Resistance Switching Effect of Memory Device Based on All-Inorganic Cspbbri2 Perovskite
by Wang Ke, Xiaoting Yang and Tongyu Liu
Materials 2021, 14(21), 6629; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14216629 - 03 Nov 2021
Cited by 5 | Viewed by 1558
Abstract
In this study, the CsPbBrI2 perovskite film was prepared by the preparation of the sol-gel and the spin-coating method, and the cubic lattice was stabilized by introducing Br+ into the CsPbI3 film, which solved the problem of instability of the [...] Read more.
In this study, the CsPbBrI2 perovskite film was prepared by the preparation of the sol-gel and the spin-coating method, and the cubic lattice was stabilized by introducing Br+ into the CsPbI3 film, which solved the problem of instability of the traditional perovskite phase. Based on the CsPbBrI2 perovskite film, the Ag/CsPbBrI2/ITO memory device with a resistance switching effect was prepared. The morphology and phase compositions of the film were analyzed by scanning electron microscope and X-ray diffraction. The non-volatile and repeatable resistance switching effect of the Ag/CsPbBrI2/ITO memory device was measured under open-air conditions. The experimental results show that the surface of the CsPbBrI2 perovskite film is uniform and dense, and the Ag/CsPbBrI2/ITO memory device has an order of magnitude resistance-on-off ratio after 500 cycles of cyclic voltage. This study shows that Ag/CsPbBrI2/ITO memory devices based on CsPbBrI2 perovskite films have potential applications in the field of non-volatile memory devices. At the same time, the transient properties of the CsPbBrI2 film that can quickly dissolve in deionized water make it potentially useful in short-period data storage units and implantable electronic devices with human or environmental sensors. Full article
(This article belongs to the Special Issue State-of-the-Art Materials Science in China)
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20 pages, 2276 KiB  
Article
InfPolyn, a Nonparametric Bayesian Characterization for Composition-Dependent Interdiffusion Coefficients
by Wei W. Xing, Ming Cheng, Kaiming Cheng, Wei Zhang and Peng Wang
Materials 2021, 14(13), 3635; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14133635 - 29 Jun 2021
Viewed by 1475
Abstract
Composition-dependent interdiffusion coefficients are key parameters in many physical processes. However, finding such coefficients for a system with few components is challenging due to the underdetermination of the governing diffusion equations, the lack of data in practice, and the unknown parametric form of [...] Read more.
Composition-dependent interdiffusion coefficients are key parameters in many physical processes. However, finding such coefficients for a system with few components is challenging due to the underdetermination of the governing diffusion equations, the lack of data in practice, and the unknown parametric form of the interdiffusion coefficients. In this work, we propose InfPolyn, Infinite Polynomial, a novel statistical framework to characterize the component-dependent interdiffusion coefficients. Our model is a generalization of the commonly used polynomial fitting method with extended model capacity and flexibility and it is combined with the numerical inversion-based Boltzmann–Matano method for the interdiffusion coefficient estimations. We assess InfPolyn on ternary and quaternary systems with predefined polynomial, exponential, and sinusoidal interdiffusion coefficients. The experiments show that InfPolyn outperforms the competitors, the SOTA numerical inversion-based Boltzmann–Matano methods, with a large margin in terms of relative error (10× more accurate). Its performance is also consistent and stable, whereas the number of samples required remains small. Full article
(This article belongs to the Special Issue State-of-the-Art Materials Science in China)
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10 pages, 3288 KiB  
Article
One-Step Construction of Multi-Walled CNTs Loaded with Alpha-Fe2O3 Nanoparticles for Efficient Photocatalytic Properties
by Jianle Xu, Qiang Wen, Xiao Zhang, Yinhui Li, Zeyue Cui, Pengwei Li and Chunxu Pan
Materials 2021, 14(11), 2820; https://0-doi-org.brum.beds.ac.uk/10.3390/ma14112820 - 25 May 2021
Cited by 8 | Viewed by 1849
Abstract
The aggregation and the rapid restructuring of the photoinduced electron−hole pairs restructuring in the process of photoelectric response remains a great challenge. In this study, a kind of Multi-walled carbon nanotubes loaded Alpha-Fe2O3 (CNTs/α-Fe2O3) heterostructure composite [...] Read more.
The aggregation and the rapid restructuring of the photoinduced electron−hole pairs restructuring in the process of photoelectric response remains a great challenge. In this study, a kind of Multi-walled carbon nanotubes loaded Alpha-Fe2O3 (CNTs/α-Fe2O3) heterostructure composite is successfully prepared via the one-step method. Due to the synergistic effect in the as-prepared CNTs/α-Fe2O3, the defect sites and oxygen-containing functional groups of CNTs can dramatically improve the interface charge separation efficiency and prevent the aggregation of α-Fe2O3. The improved photocurrent and enhanced hole–electron separation rate in the CNTs/α-Fe2O3 is obtained, and the narrower band gap is measured to be 2.8 ev with intensive visible-light absorption performance. Thus, the CNTs/α-Fe2O3 composite serves as an excellent visible light photocatalyst and exhibits an outstanding photocatalytic activity for the cationic dye degradation of rhodamine B (RhB). This research supplies a fresh application area forα-Fe2O3 photocatalyst and initiates a new approach for design of high efficiency photocatalytic materials. Full article
(This article belongs to the Special Issue State-of-the-Art Materials Science in China)
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