JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2019
·
IF 2.683
Licheng Fu,Yilun Gu,Shengli Guo,Kai Wang,Haojie Zhang,Guoxiang Zhi,Hongshan Liu,Yuzi Xu,Yi Wang,Hangdong Wang,Bin Chen,F.L. Ning
We report the synthesis and characterization of a new bulk form fluoride-antimonide diluted magnetic semiconductor SrF( Zn 1 - 2 x Mn x Cu x )Sb with ZrCuSiAs-type structure, which is the same quasi-two-dimensional crystal structure as that of 1111-type iron-based superconductors. Doping only Cu into the parent compound SrFZnSb does not induce any type of magnetic ordering. Only when Mn and Cu are codoped into Zn sites, where Mn substitution for Zn and Cu substitution for Zn introduce spins and carriers, respectively, can ferromagnetic ordering form. Bulk form samples SrF( Zn 1 - 2 x Mn x Cu x )Sb with x = 0.05, 0.075, 0.10 and 0.15 exhibit ferromagnetic transition, with highest T C ∼ 40 K for the doping level of x = 0.10. Iso-thermal magnetization measurements show that they have a relatively larger coercive field ∼ 8000 Oe. The electrical resistivity measurements indicate that SrF( Zn 1 - 2 x Mn x Cu x )Sb DMSs display semiconducting behavior, with the negative magneto-resistance effect up to 27% under 9 T at 2 K.
研究领域:
凝聚态物理
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材料科学
·
磁性与磁性材料
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半导体物理
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Ruiheng Li,Wenxin Ou,Jianglong Zhu,Qian Deng,Xiaobo Tan,Qi Zhao,Tianbo Lu,Shaojingya Gao,Huangshui Ma,Hao Wu,Qiang Sun,Ran Ang
The emerging fields of the Internet of Things, intelligent robotics, and smart biomedical devices have sparked an increasing demand for high-performance thermoelectric (TE) devices due to their efficient conversion of thermal energy into electrical power, and vice versa. The environmentally friendly (Bi, Sb) 2 Te 3 (BST) system, which displays superior performance near room temperature, offers a promising solution for optimizing thermoelectrics to meet the needs of commercial applications. Here, we utilized AgInSe 2 alloying to enhance the TE and mechanical properties of BST, aiming to optimize electron and phonon transport and elucidate the underlying mechanisms. The synergistic optimization resulted in a peak zT of ∼ 1.3 at 353 K and an average zT ave of ∼ 1.11 from 303 K to 503 K in BST-0.1 %AgInSe 2 , as well as a high Vickers hardness of ∼ 105 H v. Through rational optimization of the TE device, we achieved a maximum conversion efficiency of ∼ 6 % at a temperature difference of 210 K. Leveraging the robust TE output of the device, we further evaluated its potential as a self-powered information interaction wristband device based on ASCII codes. We envisage this versatile TE device being extensively applied in power generation and human–machine interaction, with promising potential in wearable electronics, telecommunications, and healthcare monitoring.
研究领域:
材料科学
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热电学
·
能量转换
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可穿戴技术
·
力学性能
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DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Wenquan Sun,Biao Ma,Yongjun Sun,Huaili Zheng,Genchao Ma
In this work, the degradation of tetracycline (TC) in wastewater was investigated using the γ-Al 2 O 3 – Bi–(Sn/Sb) particle electrodes. Parameters affecting the degradation efficiency and energy consumption of the γ-Al 2 O 3 –Bi–(Sn/Sb) particle electrodes, such as electrical conductivity, initial pH, air flow, current intensity, plate distance, filling ratio, and initial wastewater concentration, were systematically investigated. Results showed that the optimal conditions were 4000 mS·cm - 1 conductivity, pH 6, 15 mL·min - 1 air flow, 0.1 A current intensity, 4 cm plate distance, 0.05 g·mL - 1 filling ratio, and 100 mg·L -1 wastewater concentration. More than 90% and 70% of TC and total organic carbon were degraded, respectively, under the optimal conditions. In addition, the γ-Al 2 O 3 –Bi–(Sn/Sb) particle electrodes had good stability and reproducibility.
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高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Li Xie,Li Zou,Hao Ding,Manting Li,Ruijuan Wang,Jun Li,Qiliang Wei,Xianyou Wang
High-valence Sb 5+ doping mitigates oxygen loss and transition-metal migration. • Enlarged Li-layer spacing and reduced cation mixing favor Li + migration. • 3.Sb 5+ helps preserve the Li 2 MnO 3 -like superlattice during cycling. The pursuit of higher-energy lithium-ion batteries has brought lithium-rich manganese-based layered oxides to the forefront owing to their high theoretical capacities. However, the practical application is impeded by structural instability, transition metal (TM) migration, and sluggish Li⁺ diffusion kinetics during high-voltage cycling. To address these issues, a lattice-level strategy based on pentavalent antimony (Sb⁵⁺) doping is employed. Sb⁵⁺ incorporation helps stabilize the layered framework by enhancing the local Sb-O/TM-O bonding environment and mitigates oxygen-related structural degradation. Concurrently, the expanded Li-layer spacing and reduced cation mixing provide more favorable pathways for Li⁺ transport, as supported by GITT analysis. Experimental results demonstrate that the optimized Sb-doped material (denoted S3-LLO) retains 91.9 % of its initial capacity over 100 cycles at 1C and delivers a discharge capacity of 169.7 mAh g⁻¹ at 5C. This work provides insight into mitigating structural degradation and enhancing kinetic properties of Li-rich Mn-based cathodes via high-valence cation doping.
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高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2023
·
IF 4
Wang Yao,Jiaojiao Zhao,Qiang Li,Chujie Yu,Xuli Ding
The development of high-performance anode material for sodium-ion batteries remains a challenge because of their low capacity, which limits their commercial application. Compared with carbon-based materials, metallic Sb and SnO-based anodes have received extensive attention because of their high theoretical specific capacity and safe working potential. The main problem faced is the serious volume expansion during charging and discharging, leading to irreversible loss of capacity and poor cycle life. In this paper, Sb/SnO@C composite material with adjustable ratio of Sb/SnO was prepared via electrospinning by encapsulating Sb and SnO particles in lantern-like carbon nanocages which connected through the nanofibers . The unique structure can not only effectively mitigate the volume changes during the cycle, but also provide multiple effective paths for ion and electron transport . The kinetic analysis is further performed with the assist of CV and EIS . The results show that the prepared composite can provide impressive Na + ions storage and transport performance, and can still deliver a reversible charging capacity of 413mAhg −1 after 200 cycles at a current density of 50mAg −1 , with a capacity retention ratio of 84%. This work provides a new strategy for the development of sodium ion batteries with high capacity and stable cycle performance.
研究领域:
材料科学
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电化学
·
纳米科技
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能源存储
·
功能材料
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Yang-Wei Wang,Yu Wang,Hao Liang,Yi-Xin Zhang,Jing Feng,Zhen-Hua Ge
Bismuth telluride-based materials has been applied in thermoelectric cooling wildly, but the properties still can be further enhanced by doping, microstructure controlling and compositing strategies. Herein, we demonstrate an anomalous doping strategy in (Bi, Sb) 2 Te 3 (BST) materials, where the strong n type dopant of PbBr 2 acts as p-type dopant, introducing holes in BST materials. The anomalous doping is attributed to the dissolution of Pb and Br elements into the matrix in a non-stoichiometric ratio, with Pb predominantly occupying Sb vacancies and Br enriching the in-situ generated Sb 2 O 3 , resulting in the increased hole concentration and improved electrical conductivity. The maximum power factor (PF) ultimately increases to 3972 μW m −1 K −2 for the 0.3 mol% PbBr 2 doped BST sample. Moreover, the enhanced multi-scale wavelength phonon scattering centers cause the lattice thermal conductivity fall to 0.52 W m −1 K −1 . Finally, the peak ZT is effectively enhanced to 1.3 at 323 K, which is 22 % higher than that of pristine sample. Furthermore, a direct conversion efficiency of 4.6 % is achieved in a single 0.3 mol% PbBr 2 -doped BST leg at a temperature gradient of ΔT = 200 K. Thus, this study underscores the anomalous PbBr 2 doping in Bi 0.42 Sb 1.58 Te 3 , promoting the wider application of BST-based materials.
研究领域:
材料科学
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凝聚态物理
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功能材料
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热电转换
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半导体掺杂
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DOI
高影响因子
RARE METALS
·
2024
·Vol. 43
·期 5
·2067-2079
·
IF 9.6
Wang Dan,Ma Qun,He Huan,Wang Zhi-Yuan,Zheng Run-Guo,Sun Hong-Yu,Liu Yan-Guo,Liu Chun-Li
Antimony-based materials with high capacities and moderate potentials are promising anodes for lithium-/sodium-ion batteries. However, their tremendous volume expansion and inferior conductivity lead to poor structural stability and sluggish reaction kinetics. Herein, a double-confined nanoheterostructure Sb/Sb 2 S 3 @Ti 3 C 2 T x @C has been fabricated through a solvothermal method followed by low-temperature heat treatment. The dual protection of “MXene” and “carbon” can better accommodate the volume expansion of Sb/Sb 2 S 3 . The strong covalent bond (Ti–S, Ti–O–Sb, C–O–Sb) can firmly integrate Sb-based material with Ti 3 C 2 T x and carbon, which significantly improves the structure stability. In addition, the carbon layer can restrain the oxidation of MXenes, and the nano-Sb/Sb 2 S 3 can facilitate electron/ion transport and suppress the restacking of MXenes. The heterogeneous interface between Sb and Sb 2 S 3 can further promote interfacial charge transfer. The MXene-Sb/Sb 2 S 3 @C-1 with the optimal Sb content shows high specific capacities, comparable rate properties and ultra-stable cycling performances (250 mAh·g −1 after 2500 cycles at 1 A·g −1 for sodium-ion batteries). Ex situ X-ray diffractometer (XRD) test reveals the storage mechanism including the conversion and alloying process of MXene-Sb/Sb 2 S 3 @C-1. Cyclic voltammetry (CV) test results demonstrate that the pseudocapacitance behavior is dominant in MXene-Sb/Sb 2 S 3 @C-1, especially at large current. This design paves the way for exploring high-performance alloy-based/conversion-type anode for energy storage devices. Graphical abstract
研究领域:
材料科学
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储能
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纳米技术
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电化学
·
电池技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Tong-liang Wu,Qian Sun,Guo-dong Fang,Pei-xin Cui,Cun Liu,Marcelo Eduardo Alves,Wen-xiu Qin,Dong-mei Zhou,Zhen-qing Shi,Yu-jun Wang
Natural organic matter (NOM) profoundly influences the metal(loid)s immobilization by iron (Fe) minerals, which, in turn, are the host phase for Sb that control its mobilization and bioavailability. However, the potential effect of the redox-active phenolic acids derived from NOM on this process has rarely been explored. Therefore, the adsorption of Sb(III) on goethite and Sb(III) oxidation in the presence of a common phenolic acid—gallic acid (GA)—was systematically investigated. The reaction mechanisms were unraveled by the combination of wet chemistry, electron paramagnetic resonance (EPR), X-ray photoelectron spectroscopy (XPS), and X-ray absorption fine structure (XAFS) spectroscopy. Our results showed the addition of GA significantly inhibited Sb adsorption on goethite as the pH increased. Except for the competitive adsorption by GA, the inhibition also resulted from the extensive Sb(III) oxidation in the suspension and the lower Sb(V) sorption capacity of goethite at higher pH. The alkaline condition facilitated the generation of reactive oxygen species (hydrogen peroxide) and quinone species (semiquinone radical (SQ − ) and oxidized GA), accounting for the significant Sb(III) oxidation in the solution and on the goethite surface. Besides, the edge-sharing inner-sphere complexes were formed between Sb and goethite regardless of the presence of GA. Our findings demonstrated the remarkable role of the phenolic groups in NOM on the adsorption of Sb(III) on goethite.
研究领域:
环境科学
·
土壤化学
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产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2013
·Vol. 15
·期 17
·3296-3300
·
IF 3.879
J. M. Xu,L. Li,S. Wang,H. L. Ding,Y. X. Zhang,G. H. Li
The influence of Sb doping on the structural and optical properties of the SnO2 nanocrystals and films were investigated. An unusual enhancement in near infrared absorption was found in the SnO2 nanocrystals with increasing Sb doping content, and the maximum absorption shifted to shorter wavelength.
研究领域:
材料科学
·
光学
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 6
·1433-1441
·
IF 2.5
Mao Qianlun,Jia Yuexin,Zhu Wenhao,Gao Lijun
Antimony (Sb) has been recognized as one of the most promising metal anode materials for sodium-ion batteries, owing to its high capacity and suitable sodiation potential. Nevertheless, the large volume variation during (de)alloying can lead to material fracture and amorphization, which seriously affects their cycling stability. In this work, we report an engineering strategy by encapsulating Sb nanoparticles in nitrogen-doped spherical carbon shells (Sb@CN). This unique structure can efficiently accommodate volume variation and release stress upon sodiation, thus maintaining structural integrity. As a result, the Sb@CN composite exhibits an excellent sodium storage performance, achieving a capacity of 282 mAh g −1 over 5000 cycles at the current density of 0.66 A g −1 , and the capacity retention rate from the second cycle to the 5000th cycle is close to 100%. Moreover, it also shows a remarkable rate capability of 217 mAh g −1 at a high current density of 3.3 A g −1 . It is believed that this composition strategy would provide guidance toward stable alloy anodes for sodium-ion batteries.
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产品关联
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高影响因子
Journal of Bionic Engineering
·
2022
·Vol. 20
·期 3
·1072-1082
·
IF 2.995
Cui Lingling,Chen Junyue,Yan Chengqi,Xiong Dangsheng
Poly (vinyl alcohol) hydrogel has been perceived as a promising replacement for articular cartilage due to its superior water-absorption ability and excellent biocompatibility, but its mechanical properties are still insufficient. In this study, the poly (vinyl alcohol)/sodium tetraborate triple-network (PVA/SB TN) hydrogel was developed by repeated freeze–thaw method. Scanning electron microscopy images demonstrated that the structure of as-prepared hydrogels was three-dimensional porous network structure similar to that of natural articular cartilage. Compared to the pure PVA hydrogel, the mechanical performance of the PVA/SB TN hydrogels were improved by 116% and 461% in tensile and compressive strengths, respectively. This was mainly because that the complexation reaction between the PVA and SB strengthened the stability of the hydrogel network. Notably, the biotribological performance of PVA hydrogel has also been improved significantly. Even at high load, the friction coefficient of the PVA/SB TN hydrogel was both very low in calf serum or deionized water. This PVA/SB TN hydrogel with good mechanical property and low friction has high application potential in cartilage repair.
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Xuewen Xie,Jinbo Zhao,Shangtao Liang,Xiong He,Chenghao Yu,Ruzhen Xie,Jiale Xu,Lihui Yang,Dengmiao Cheng,Hui Lin
Herein, we reported using nontoxic Ce for co-doping to reduce the dopant amount of highly toxic Sb, resulting in a boost to the ability of SnO 2 reactive electrochemical membrane (REM) in the oxidation of refractory herbicide atrazine (ATZ). The study found that co-doping Ce causes the expansion of SnO 2 crystal and yields numerous defects on the SnO 2 crystal surface, creating more reactive sites and significantly enhancing the catalytic activity of Sb-doped SnO 2 REM. A single-pass through the Sb, Ce co-doped SnO 2 REM system could reduce ATZ in a real groundwater sample from a 10 μg·L –1 of feed concentration to steadily below the EAP regulatory maximum contaminant level of 14 nM. The addition of high concentrations of chloride and natural organic matters greatly inhibits the oxidation of ATZ, whereas solution pH and bicarbonate have less effect. Quenching experiments demonstrate that hydroxyl radical ( • OH) plays the key role in ATZ oxidation. The degradation by-products of ATZ were identified using high-resolution mass spectrometry , and possible degradation pathways, including • OH‐induced de-alkylation and • OH de-chlorination processes, were proposed based on the by-products’ concentration changes. Biological toxicity tests using freshwater green algae Chlorella vulgaris demonstrated that the toxicity of ATZ effluent was greatly eliminated.
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高影响因子
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