ADVANCED MATERIALS
·
2024
·Vol. 36
·期 30
·2404629
·
IF 27.4
Jing Liang,Xin Zhang,Haidong Li,Chuanxi Wen,Longlong Tian,Ximeng Chen,Zhan Li
The special properties of rare earth elements (REE) have effectively broadened their application fields. How to accurately recognize and efficiently separate target rare earth ions with similar radii and chemical properties remains a formidable challenge. Here, precise two-dimensional (2D) heterogeneous channels are constructed using engineered E. coli membranes between graphene oxide (GO) layers. The difference in binding ability and corresponding conformational change between Lanmodulin (LanM) and rare earth ions in the heterogeneous channel allows for precisely recognizing and sieving of scandium ions (Sc 3+ ). The engineered E. coli membranes not only can protect the integrity of structure and functionality of LanM, the rich lipids and sugars, but also help the Escherichia coli ( E. coli ) membranes closely tile on the GO nanosheets through interaction, preventing swelling and controlling interlayer spacing accurately down to the sub-nanometer. Apparently, the 2D heterogeneous channels showcase excellent selectivity for trivalent ions (SF Fe /Sc ≈3), especially for Sc 3+ ions in REE with high selectivity (SF Ce/Sc ≈167, SF La/Sc ≈103). The long-term stability and tensile strain tests verify the membrane's outstanding stability. Thus, this simple, efficient, and cost-effective work provides a suggestion for constructing 2D interlayer heterogeneous channels for precise sieving, and this valuable strategy is proposed for the efficient extraction of Sc.
研究领域:
材料科学
·
生物化学
·
分离技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yanzhou Lu,Xiaofan Sun,Min Zhao,Shulin Jiao,Dong Li,Peng Chen,Wentao Zhang,Kongmeng Ye,Libo Xu,Qi You,Hong-Ling Cai,XiaoShan Wu
The electrocaloric effect (ECE) is a novel technology that offers high efficiency and environmental friendliness, making it suitable for solid-state refrigeration applications. Among the extensively studied ECE materials, lead scandium tantalate (PST) stands out for its excellent performance. However, its applications are restricted by its narrow working temperature range. To overcome this limitation, we explore the enhancement of the ECE through zirconium ion doping. We synthesized PbSc0.5–0.5xTa0.5–0.5xZrxO3 samples (x = 0, 0.025, 0.05, 0.075). The introduction of zirconium ions led to an increase in the Curie temperature from 28.9 °C (x = 0) to 55.5 °C (x = 0.075). Additionally, the relaxation factor γ of the ceramics increased from 1.40 (x = 0) to 1.59 (x = 0.075). The temperature span (Tspan) exhibited a rising trend with increasing x, reaching 10.9 K at x = 0.075. The maximum temperature change (ΔTmax) was observed at x = 0.025, with a value of 1.94 K. X-ray diffraction (XRD) patterns revealed that zirconium ion doping influenced the B-site ordering degree, thereby regulating the ECE. To further validate the results, we employed direct measurements and thermodynamic calculations. Overall, the regulation of ionic ordering through zirconium doping effectively enhances the ECE performance. These findings contribute to the development of advanced materials for solid-state refrigeration technologies.
研究领域:
材料科学
·
固体物理
·
制冷技术
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 26
·51467-51475
·
IF 5.6
Wenjie Wang,Jianyan Ding,Quansheng Wu
In recent years, multi-mode fluorescent anti-counterfeiting technology has been regarded as a promising replacement for traditional single-fluorescent-pattern-based methods in ensuring information security. This advancement necessitates phosphors with multi-mode photoluminescent properties. In contrast to the conventional complex approach involving the integration of downshifting and upconversion phosphors, this study demonstrates the achievement of multiple visible-light emissions in Bi 3+ -activated scandium silicate NaSrScSi 2 O 7 , which exhibits sensitivity to near-ultraviolet light. Under the excitation at 370 nm, Bi 3+ -activated NaSrScSi 2 O 7 emits a narrow-band blue light, yet it can emit a broad-band cyan light under the excitation at 340 nm. The significant photoluminescence property of Bi 3+ ion is proved to originate from special crystal structure of NaSrScSi 2 O 7 , which provides multiple crystallographic sites for accommodating Bi 3+ ion. Benefiting from the characteristic of NaSrScSi 2 O 7 , the sample performs excellent thermal and chemical stability. A warm WLED device has been fabricated by using as-prepared sample. Finally, a pattern produced by Bi 3+ -activated NaSrScSi 2 O 7 is proved to emit distinguishing visible light under the common 365 nm and 340 nm near-ultraviolet lamp, which is considered to pave a simple approach for realizing high-level fluorescent anti-counterfeiting technology.
研究领域:
材料科学
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光学材料
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固态化学
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发光学
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防伪技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Tianlei Yang,Tao Li,Yueping Guan
Extraction of low-concentration rare earths is one of the important paths for the sustainability of the rare earth industry. The research and development of materials suitable for the extraction of rare earth ions at low concentrations is of great significance. Currently, the application of solvent extraction in the rare earth production industry is highly mature. However, it is not economical to use it for the extraction of low concentration rare earths with problems of phase separation and organic phase loss. This work innovatively proposes to encapsulate the extractant and diluent in magnetic oleogel microspheres, which are obtained by solubilizing magnetic poly (phenyl divinylbenzene)(PS-DVB) microspheres with the extractant and diluent.. The magnetic PS-DVB microspheres of 3 ∼ 16 μm were prepared by suspension polymerisation, followed by encapsulation of di(2-ethylhexyl)phosphoric acid (D2EHPA) and dichloroethane in magnetic PS-DVB microspheres using emulsion swelling, and then magnetic oil-based gel microspheres containing D2EHPA with a particle size of 10 ∼ 32 μm were obtained. The magnetic oil-based gel microspheres containing D2EHPA consist of about 96 wt% liquid phase and about 4 wt% solid phase, with D2EHPA accounting for more than 4.19 wt%. The magnetic oil-based gel microspheres are very close to small oil droplets and are superparamagnetic. The magnetic oil-based gel microspheres containing D2EHPA could completely extract 60 ppm of scandium ions(Sc 3+ ) under the conditions of O:A = 1:50,1:60,1:70, and the extraction equilibrium times were 6, 9 and 12 min, respectively. This extractant encapsulation scheme inherits the selectivity of traditional extractants while simultaneously preserving the advantages of rapid extraction by solvent extraction.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 43
·14839-14846
·
IF 4.029
Ruru Ma,Dongdong Xu,Yun Yang,Xin Su,Binghua Lei,Zhihua Yang,Shilie Pan
Two new isostructural rare-earth oxyborates ScMO(BO3) (M = Ca and Cd) with a three-dimensional (3D) cationic framework and parallel arranged [BO3] triangles have been synthesized by the flux method. In the 3D cationic framework, an interesting sandwich-like basic building unit (BBU) is constructed by two ∞1[Ca(1)O4]6− chains and two ∞1[Sc(1)O4]5− chains. ScMO(BO3) melt incongruently, which shows that title compounds can be grown by the flux method. The UV cut-off edges for ScCaO(BO3) and ScCdO(BO3) are 230 and 249 nm, respectively. In addition, the first-principles calculations are performed to gain further insights into the relationship between the microscopic electronic structures and associated optical properties.
研究领域:
材料科学
·
晶体化学
·
光学材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 29
·期 3
·1817-1822
·
IF 2.019
Wang Zixing,Yuan Changlai,Zhu Baohua,Feng Qin,Liu Fei,Miao Lei,Zhou Changrong,Chen Guohua
A novel microwave dielectric ceramics Bi(Sc 1/3 Mo 2/3 )O 4 with low firing temperature were prepared via the solid reaction method. The specimens have been characterized using scanning electron microscopy, X-ray diffraction, Raman spectroscopy and DC conductivity. The Bi(Sc 1/3 Mo 2/3 )O 4 ceramics showed B-site ordered Scheelite-type structure with space group C2/c. Raman analysis indicated that prominent bands were attributed to the normal modes of vibration of MoO 4
2− tetrahedra. The dielectric loss of Bi(Sc 1/3 Mo 2/3 )O 4 ceramics can be depended strongly the bulk conductivity by DC measurement. The superior microwave dielectric properties are achieved in the Bi(Sc 1/3 Mo 2/3 )O 4 ceramic sintered at 875 °C/4 h, with dielectric constant ~ 25, Q × f ~ 51,716 GHz at 6.4522 GHz and temperature coefficient of resonance frequency ~ − 70.4 ppm/°C. It is a promising microwave dielectric material for low-temperature co-fired ceramics technology.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Bao Jiang,Hongheng Chen,Xianmeng He,Lei Wu,Xueyin Fu,Yi Huang,Qun Jing,Zhaohui Chen
Rare-earth ions have garnered significant attention due to their large ionic radii and unique electronic configurations. In this study, two scandium-based pyrophosphates, ASc2(P2O7)2 (A = Ba, Pb), were successfully synthesized by using a high-temperature melting method. They are the first reported examples of divalent cations binding to scandium-based pyrophosphates. The anionic backbones in their structures are all based on Sc–P–O frameworks, and two distinct cluster configurations are observed: cyclic [ScP2O10] and linear [ScP2O11] clusters. A comprehensive comparison of Sc/Y-based pyrophosphates reveals a strong correlation between the Sc–P–O configurations and the A-site cationic coordination environments. This work also investigated the influence of cations on the P–O configuration of existing Sc/Y-based pyrophosphates, which also offers useful reference for the synthesis of novel scandium-based phosphates.
研究领域:
无机化学
·
材料科学
·
固态化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2023
·
IF 29.4
Li Ya Liang,Bin Bin Chen,Ya Ting Gao,Jian Lv,Meng Li Liu,Da Wei Li
Achieving aqueous solution enhanced room temperature phosphorescence (RTP) is critical for the applications of RTP materials in solution phase, but which faces a great challenge. Herein, for the first time, a strategy of coordination-induced structural rigidity is proposed to achieve enhanced quantum efficiency of aluminum/scandium-doped phosphorescent microcubes (Al/Sc-PMCs) in aqueous solution. The Al/Sc-PMCs in a dry state exhibit a nearly invisible blue RTP. However, they emit a strong RTP emission in aqueous solution with a RTP intensity increase of up to 22.16-times, which is opposite to common solution-quenched RTP. The RTP enhancement mechanism is attributed to the abundant metal sites (Al 3+ and Sc 3+ ions) on the Al/Sc-PMCs surface that can tightly combine with water molecules through the strong coordination. Subsequently, these coordinated water molecules as the bridging agent can bind with surface groups by hydrogen bonding interaction, thereby rigidifying chemical groups and inhibiting their motions, resulting in the transition from the nonradiative decay to the radiative decay, which greatly enhances the RTP efficiency of the Al/Sc-PMCs. This work not only develops a coordination rigidity strategy to enhance RTP intensity in aqueous solution, but also constructs a phosphorescent probe to achieve reliable and accurate determination of analyte in complex biological matrices.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
PubMed
高影响因子
SOLID STATE IONICS
·
2025
·
IF 3.3
Sara Adeeba Ismail,Lulu Jiang,Hui Guo,Wenhao Li,Donglin Han
Ba 7 Nb 4 MoO 20 has acceptably high ionic conductivity at 600–800 °C and is attractive for potential application in high temperature solid state electrochemical devices. Up to now, most of the research focuses on isovalent and donor-doping to improve the electrical properties of Ba 7 Nb 4 MoO 20 . In this work, an acceptor-doping strategy was taken by doping Sc and Zr to partially substitute Nb. More vacant oxygen sites thereby form for charge compensation, leading to the increasing proton concentration following the compositional sequence of hydrated Ba 7 Nb 4 MoO 20 < Ba 7 Nb 3.97 Zr 0.03 MoO 19.985 < Ba 7 Nb 3.97 Sc 0.03 MoO 19.97 . Notably, both the H 2 O/D 2 O isotope effect and EMF measurements indicate that the proton conduction – if there is any – is negligibly small, and the Sc and Zr-doped Ba 7 Nb 4 MoO 20 is essentially an oxide ion conductor in the temperature range studied in this work.
研究领域:
材料科学
·
固体离子学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 41
·e202403137
·
IF 1.9
Hua-Ying Chen,Jian Lv,Ruo-Can Qian,Da-Wei Li,Bin-Bin Chen
Graphical Fluorescent scandium microspheres for highly efficient white-light photocatalysis. Scandium-based fluorescent microspheres (Sc-FMs) are prepared by a facile one-pot hydrothermal polymerization method, which can be well used for the highly-efficient photodegradation of dye pollutants (rhodamine 6 G) under low power white light without the assistance of any radical generating agents due to the strong generation ability of ⋅O 2 - and h + by Sc-FMs Efficient photocatalysts play an important role in the various fields such as pollutant treatment and the generation of clean energy. Therefore, developing a photocatalyst with high activity is of great significance. Herein, scandium-based fluorescent microspheres (Sc-FMs) are facilely prepared through the one-pot hydrothermal polymerization of scandium ions and tartaric acid. The prepared Sc-FMs show strong blue solid-state fluorescence, with a maximum emission at 412 nm. Meanwhile, Sc-FMs possess a strong white-light photocatalysis ability, which can be used for the photodegradation of dye pollutants (rhodamine 6 G) under low power white light without the assistance of any radical generating agents. In addition, the Sc-FMs display good stability and recyclability. As a result, this new and efficient Sc-FMs photocatalysts hold a promise for potential applications in environmental treatment.
研究领域:
环境科学
·
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2016
·Vol. 40
·期 11
·9211-9222
·
IF 3.277
Bei Zhao,Li Yuan,Shanshan Hu,Xuemei Zhang,Xianju Zhou,Jianfeng Tang,Jun Yang
Novel Sc2Mo3O12:Ln3+ (Ln = Eu, Tb, Dy, Tb/Eu, Dy/Eu) phosphors have been synthesized via a one-step hydrothermal route using glycine (Gly) as a surfactant. The phosphors were characterized using X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), photoluminescence (PL), and luminescence decays. It was found that various surfactants had a profound influence on the crystal phase, morphology and emission intensity of the final products. Furthermore, the photoluminescence of Ln3+-doped Sc2Mo3O12 phosphors (Ln = Eu, Tb, Dy, Tb/Eu, Dy/Eu) was studied in detail. The energy transfer of MoO42− → Tb3+ (Dy3+) → Eu3+ and multicolor tunable emission occurred by changing the ratio of Tb3+/Eu3+ or Dy3+/Eu3+ under single wavelength excitation. Moreover, the energy transfer mechanism from Tb3+ (Dy3+) to Eu3+ was ascribed to dipole–dipole interactions and the energy transfer efficiency from Tb3+ to Eu3+ (95.3%) was higher than that from Dy3+ to Eu3+ (87.5%). Their tunable multicolor luminescence properties make Sc2Mo3O12:Ln3+ (Ln = Eu, Tb, Dy, Tb/Eu, Dy/Eu) phosphors suitable for many potential applications in the fields of color displays and fluorescent lamps.
研究领域:
材料科学
·
无机化学
·
纳米材料
·
发光材料
·
固态化学
✓ 已验证
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2020
·
IF 2.65
Xiao-yu Zhang,Min Xu,Sheng-zhu Cao,Wen-bo Chen,Wen-yao Yang,Qin-yu Yang
Diamond/copper composite has been considered as one of the next generation thermal management materials. Interfacial modification is an essential means of ameliorating interface wettability and bonding of diamond/copper composite for improving its thermal conductivity . In the present work, Diamond/copper composite was manufactured by using spark plasma sintering (SPS) technology with 60% volume fraction of diamond mixed with 40% volume fraction of copper power, chromium powder (0.7 wt%) and scandium oxide powder (0.21 wt%). A series of material analysis methods were used to characterize the microstructure, interfacial layer , phase compositions and distributions of Diamond/copper composite. The total and partial electron density of states (DOS) for Diamond-Cr-Sc 2 O 3 interfacial model was investigated by means of first-principles calculations from CASTEP modules. The results showed Sc 2 O 3 made a 5–20 nm well-arranged and uniformly distributed interfacial chromium carbide layer in the interface region, which played a critical role in increasing the amount of reactive interfacial bonding and decreasing defect. The addition of Sc 2 O 3 brought the increasing number of heat transfer carriers at the interface and made the interface energy system more stable. The obtained diamond/copper composite exhibited that the wettability between diamond particles and copper was effectively improved. The thermal conductivity of diamond/copper is 872 W/(m·K) and the possible reasons for doping rare-earths Sc 2 O 3 to improve the thermal conductivity were discussed.
研究领域:
材料科学
·
复合材料工程
·
界面科学
·
热管理材料
·
粉末冶金
·
计算材料学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）