CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Xiang Ji,Xinyi Dai,Fuzhong Wu,Yi Mai,Haijun Chen,Yijing Gu
LiNi 0.5 Mn 1.5 O 4 (LNMO) is a promising next-generation cathode material for high energy density lithium-ion batteries, but the application of LNMO is blocked because of its inherent side effects with electrolytes at high voltages, namely, serious Mn dissolution and capacity attenuation. A novel LiNi 0.5 Mn 1.5-x Sr x O 4 material (x = 0, 0.05, 0.1, 0.15, and 0.2) was successfully prepared using the sol-gel method, and the effect of varying in situ Sr 2+ -doping on the crystal structure, morphology, and electrochemical performance was researched. A series of characterizations showed that the Sr-doped LNMO structure contains less Mn 3+ , which enhances its cycling stability. In addition, Sr doping promotes morphological changes more remarkably. Accompanied by the appearance of (100) surfaces, the morphology of LNMO changes from an octahedron to a truncated octahedron. The (100) surface can effectively inhibit side reactions with the electrolyte and steady the structure at the working voltage, which also helps support Li + transport kinetics. The Sr-doped LiNi 0.5 Mn 1.4 Sr 0.1 O 4 (expressed as LNMO-Sr0.1) cathode exhibits preeminent cycling stability, after 500 cycles at 1C, the capacity retention is 86.63 %. CV and EIS results show that the right amount of Sr doping efficiently reduces electrode polarization and charge transfer resistance and increases the Li + diffusion coefficient .
研究领域:
材料科学
·
电化学
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Gaoqing Hang,Qiulei Li,Alberto José Fernández-Carrión,Sihao Deng,Lunhua He,Xiaojun Kuang,Xiaoyan Yang
Oxide-ion conductors based on tetrahedral anion-related oxides have attracted considerable attention due to their high oxygen-ion conductivity and potential applications in clean energy devices, such as solid-state fuel cells. In this study, we report the improvement of oxide-ion conductivity by Sr2+ doping in isolated tetrahedral zircon-type PrVO4. It is found that Pr0.975Sr0.025VO4−δ features the highest oxide-ion conductivity of 2.62 × 10–3 S·cm–1 at 800 °C under air, with an oxygen transport number of 0.93. The formation and stabilization of oxygen vacancy defects, as well as the oxide-ion migration mechanism in PrVO4, were investigated through combining experimental characterizations and computing simulations. The results indicate that the concentration of oxygen vacancy defects increases with Sr2+ substitution, and the vacancies are accommodated by the formation of corner-sharing V2O7 dimers. Oxygen-ion migration proceeds via a cooperative mechanism involving V2O7-dimer breaking and reforming assisted by synergistic rotation and deformation of neighboring VO4 tetrahedra. The results provide valuable insights for further investigation and optimization of zircon-type oxides as potential oxide-ion conductors for electrochemical devices.
研究领域:
材料科学
·
固体离子学
·
能源材料
·
计算材料科学
·
电化学器件
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PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Taijia Li,Guichun He,Mengfei Liu,Zhiwen Cao,Jie Min
Selective separation of 90 Sr 2+ and 137 Cs + from nuclear wastewater is a significant challenge in the field of environmental remediation. In this paper, magnetic P-type zeolite composites loaded with Fe 3 O 4 were successfully synthesized via an alkali fusion-assisted hydrothermal method using lithium porcelain clay tailings (LPCT) as the silicon-aluminum source, achieving resource utilization of solid waste. The material exhibited excellent selective adsorption capacity for Sr 2+ : under the conditions of pH = 6 and a dosage of 2 g/L, the removal rate for Sr 2+ (100 mg/L) reached 99.4%, while that for Cs + (50 mg/L) was only 55.2%. In simulated/real seawater systems, the material maintained exceptionally high selectivity for trace Sr 2+ (with a K d value of 1.265 L·g –1 in simulated seawater). Mechanistic studies revealed that Sr 2+ undergoes specific ion exchange primarily by substituting Na + within the zeolite framework (adsorption energy: −2.37 eV), forming stable chemical bonds; in contrast, Cs + binds only through weak physical adsorption (adsorption energy: −0.85 eV), making it susceptible to displacement by competing ions. After five cycles, the Sr 2+ removal rate remained above 65%. This study presents a strategy for upcycling solid waste into high-performance functional materials and offers a promising solution for the efficient and selective separation of radioactive Sr 2+ from complex aqueous environments, highlighting its potential for practical nuclear wastewater treatment.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 9
·665
·
IF 3.2
Su Xiuyuan,Chen Yuan-Bin,Chen Junyu,Ma Shijie,Lin Haiqiang
In this study, Sr 2+ was employed to substitute Ca 2+ in KCaPr(MoO 3 ) 4 ceramics. Such ion substitution was found to effectively enhance the Q × f value of KCaPr(MoO 3 ) 4 and moderately decrease its sintering temperature. Scanning electron microscopy (SEM) observations and density measurements indicated satisfactory sintering characteristics of this series of ceramics. Meanwhile, X-ray diffraction (XRD) and Raman spectroscopy analyses suggested the formation of a solid solution without obvious secondary phases or impurities, verifying the successful preparation of single-phase molybdate ceramics. On the basis of P–V–L theoretical analysis, it was suggested that K/Ca/Pr–O bonds mainly contribute to the bond ionicity (fᵢ), whereas Mo–O bonds exert considerable influences on the lattice energy (U), bond energy (E), and thermal expansion coefficient (α). Among the as-prepared ceramic samples, KCa 0.98 Sr 0.02 Pr(MoO 3 ) 4 exhibited the most favorable dielectric properties at 700 ℃ with a relative permittivity (εᵣ) of 10.744, a quality factor-frequency product (Q × f ) of 89 349 GHz, and a temperature coefficient of resonant frequency (τ f ) of − 59.947 ppm/ C. Benefiting from the ion substitution strategy, the obtained materials possessed relatively low sintering temperatures and high Q × f values, suggesting promising potential for application in ultra-low-temperature co-fired ceramics (ULTCC).
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Nano Energy
·
2021
·
IF 17.881
Cheng Chen,Tongtong Xuan,Wenhao Bai,Tianliang Zhou,Fan Huang,An Xie,Le Wang,Rong-Jun Xie
Removing long-chain ligands on the surface of perovskite nanocrystals (NCs) is a promising strategy to facilitate charge transport towards a high-performance perovskite light-emitting diode (PeLED). However, perovskite NCs , especially CsPbI 3 NCs, tend to decompose in the ligand removal procedure due to their poor stability of perovskite NCs and high polarity of solvents. Here, we report Sr 2+ -doped CsPbI 3 NCs that were synthesized by a modified hot injection method. These NCs show enhanced stability and near-unity photoluminescence quantum yield (PLQY, 99.8%). More importantly, the CsPbI 3 :Sr 2+ NCs still maintain a high PLQY (97.5%) after removing surface ligands by a polar solvent (ethyl acetate, EA). Furthermore, a mixture of EA and octane was used to prepare smooth and dense CsPbI 3 :Sr 2+ NC films with an exceedingly high PLQY of 73.2% and a high stability under ambient conditions. Finally, the red-emitting CsPbI 3 :1.8% Sr 2+ PeLEDs demonstrate a world-record peak external quantum efficiency (EQE) of 17.1%.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
半导体物理
·
发光二极管
·
光电功能材料
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DOI
高影响因子
Light-Science & Applications
·
2022
·Vol. 11
·期 1
·1-10
·
IF 20.257
Liu Dongjie,Li Guogang,Dang Peipei,Zhang Qianqian,Wei Yi,Qiu Lei,Molokeev Maxim S.,Lian Hongzhou,Shang Mengmeng,Lin Jun
Near-infrared (NIR)-emitting phosphor-converted light-emitting diodes have attracted widespread attention in various applications based on NIR spectroscopy. Except for typical Cr 3+ -activated NIR-emitting phosphors, next-generation Cr 3+ -free NIR-emitting phosphors with high efficiency and tunable optical properties are highly desired to enrich the types of NIR luminescent materials for different application fields. Here, we report the Fe 3+ -activated Sr 2− y Ca y (InSb) 1− z Sn 2 z O 6 phosphors that exhibit unprecedented long-wavelength NIR emission. The overall emission tuning from 885 to 1005 nm with broadened full-width at half maximum from 108 to 146 nm was realized through a crystallographic site engineering strategy. The NIR emission was significantly enhanced after complete Ca 2+ incorporation owing to the substitution-induced lower symmetry of the Fe 3+ sites. The Ca 2 InSbO 6 :Fe 3+ phosphor peaking at 935 nm showed an ultra-high internal quantum efficiency of 87%. The as-synthesized emission-tunable phosphors demonstrated great potential for NIR spectroscopy detection. This work initiates the development of efficient Fe 3+ -activated broadband NIR-emitting phosphors and opens up a new avenue for designing NIR-emitting phosphor materials.
研究领域:
材料科学
·
光学工程
·
光谱学
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高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2024
·Vol. 333
·期 5
·2389-2402
·
IF 1.5
Mao Xueli,Xu Hechao,Liao Xin,Bu Fankang,Tang Jinrong,Yi Facheng
This study achieves the successful immobilization of simulated alpha- and beta-emitting radionuclides (Nd 3+ and Sr 2+ , respectively) by incorporating them into a glass matrix through Nd 2 O 3 /SrSO 4 (Nd/Sr). Varying mixture concentrations (5–30 wt% with mass ratios Nd:Sr varied from 10:1 to 1:10) in simulated radioactive soils were subjected to microwave sintering at 1500 °C for 0.5 h. Comprehensive assessments, including X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, scanning electron microscopy (SEM), and energy dispersive X-ray spectrometry (EDS), confirm the vitrification process’s efficacy. The vitrified sample exhibits an amorphous structure, smooth surface, and homogeneously distributed elements, highlighting microwave sintering as a promising method for the effective disposal of radioactive-contaminated soil. Graphical abstract
研究领域:
环境科学
·
核废物处理
·
材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Jianqi Xiong,Hang Zheng,Yijiu Zhang,Zefeng Xie,Zheng Xiang,Tao Sun,Zhigang Zhou,Zhikun Li,Zhuoying Cai,Sailang Shi,Yanming Liu
A multifunctional hydrogel microsphere system with antioxidant, immunomodulatory, and osteogenic functions was developed. • The Sr-MOF enabled efficient curcumin loading for ROS scavenging and macrophage polarization regulation. • Microfluidics encapsulated Cur-loaded Sr-MOF into GelMA microspheres for sustained release of Cur and Sr 2+ . • Cur@Sr-MOF@GelMA microspheres promoted osteogenesis by establishing a favorable immune microenvironment. Bone regeneration in large bone defects is often impeded by an unfavorable microenvironment characterized by excessive reactive oxygen species (ROS), dysregulated macrophage polarization, and poor osteogenic capacity. Therefore, it was hypothesized that a bioactive material targeting these disadvantages is promising in bone defect repair. In the study, we synthesized a hydrogel microsphere system (Cur@Sr-MOF@GelMA), in which the polyphenolic compound curcumin (Cur) was adsorbed onto a strontium-based metal - organic framework (Sr-MOF) and subsequently encapsulated within gelatin methacryloyl (GelMA) microspheres. The Cur@Sr-MOF@GelMA microspheres enabled the sustained release of Cur and Sr 2+ . Cur effectively scavenged ROS and induced M2 polarization of macrophages (RAW264.7 cells), establishing a favorable microenvironment for bone regeneration. Furthermore, Cur@Sr-MOF@GelMA microspheres demonstrated a dual osteogenic effect on MC3T3-E1 cells, directly via Sr 2+ and indirectly through Cur-mediated immunomodulation of RAW264.7 cells. Transcriptomic sequencing analysis indicated that Cur@Sr-MOF@GelMA microspheres might enhance M2 polarization of RAW264.7 cells through suppression of pro-inflammatory pathways (NLR, TLR and TNF signaling), and promote osteogenic differentiation of MC3T3-E1 cells via upregulation of the Wnt signaling pathway. In vivo experiments in rats demonstrated that Cur@Sr-MOF@GelMA microspheres established an M2 macrophage-dominant microenvironment at early stages, accelerated bone formation and eventually resulted in the highest bone volume fraction (BV/TV) in critical-sized calvarial defects at 12 weeks. In conclusion, the Cur@Sr-MOF@GelMA microsphere system possesses antioxidant, immunomodulatory, and osteoinductive properties, and represents a promising material for bone defect repair.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2016
·
IF 4.836
Lin Zhang,Ying Lu,Ying-Ling Liu,Ming Li,Hai-Yang Zhao,Li-An Hou
Graphene oxide (GO)-based membranes provide an encouraging opportunity to support high separation efficiency for wastewater treatment. However, due to the relatively weak interaction between GO nanosheets, it is difficult for bare GO-based membranes to survive in cross-flow filtration. In addition, the permeation flux of the bare GO membrane is not high sufficiently due to its narrow interlayer spacing. In this study, GO membranes interlinked with multi-walled carbon nanotubes (MWCNTs) via covalent bonds were fabricated on modified polyacrylonitrile (PAN) supports by vacuum filtration. Due to the strong bonds between GO, MWCNTs and the PAN membrane, the membranes could be used for the treatment of simulated nuclear wastewater containing strontium via a cross-flow process. The result showed a high flux of 210.7 L/(m 2 h) at 0.4 MPa, which was approximately 4 times higher than that of commercial nanofiltration membranes. The improved water permeation was attributed to the nanochannels created by the interlinked MWCNTs in the GO layers. In addition, the hybrid membrane exhibited a high rejection of 93.4% for EDTA-chelated Sr 2+ in an alkaline solution, and could also be used to separate Na + /Sr 2+ mixtures. These results indicate that the MWCNTs-interlinked GO membrane has promising prospects for application in radioactive waste treatment.
研究领域:
环境科学
·
材料科学
·
废水处理
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2026
·
IF 5.8
Yan Yuxin,Zou Ailing,Wang Yiyan,Zhang Yanjie,Yu Jingjie,Xiao Zhiguo
CsPbX 3 (X = I, Br, Cl) perovskite quantum
dots (PQDs)
are promising for optoelectronic applications owing to their tunable
bandgap, high photoluminescence (PL) quantum yield, and narrow emission
bandwidth. However, CsPbBr 3 PQDs exhibit a large Stokes
shift (>155 nm) and are mainly excited by near-ultraviolet light
(∼365
nm), resulting in substantial energy loss and limiting their compatibility
with blue light-emitting diodes (LEDs) excitation. Herein, Sr 2+ /Cl – codoped CsPbBr 3 PQDs embedded
in zinc borosilicate (ZBS) glass powders were developed to regulate
the band structure. Sr 2+ incorporation significantly enhances
PL performance. Notably, CsPb 0.5 Sr 0.5 Br 3 PQDs exhibit ∼1.6 times higher PL intensity than undoped
samples with a slight red-shift (∼5 nm). Meanwhile, the bandgap
of CsPb 0.1 Sr 0.9 Br 3 PQDs is widened
to 3.12 eV compared to 2.36 eV for CsPbBr 3 . Totally different
with undoped PQDs, the excitation peak of CsPb 0.1 Sr 0.9 Br 3 PQDs covers the desired blue-violet region
in the range of 400–480 nm and the maximum peak is located
at 414 nm, which displays a narrow Stokes shift of 106 nm. Further,
Cl – ions substitution in Sr-doped host materials
enables the blueshift of the PL emission from 521 nm (green light)
to 448 nm (blue light) via bandgap engineering accompanied by ultranarrow
Stokes shift of ∼34 nm for CsPb 0.1 Sr 0.9 BrCl 2 sample. The Sr-doped PQDs embedded in ZBS glass
also demonstrate excellent water resistance, retaining ∼96%
of their initial PL intensity after immersion in deionized water for
more than 60 days. Thus, the ultrastable PQDs glass powders can be
effectively excited by the blue-violet light chip (410 nm-460 nm)
via bandgap engineering possess and demonstrate promising application
potential in color-conversion display devices, wide-color-gamut backlight
systems and screen-printable emissive display films.
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高影响因子
ACS Applied Energy Materials
·
2026
·
IF 5.5
Tian Zhang,Longhan Zhang,An Xiao,Yafei Hou,Chuang Yue,Baoli Jiang,Xiang Ruan,Renkun Lin,Jing Cuan,Yuejin Zhu,Chaofeng Zhang,Weiping Li
Vanadium-based oxides possess unique superiorities in aqueous zinc-ion batteries (AZIBs) due to their high theoretical specific capacity and open crystal framework properties. However, only limited studies have been conducted on e vanadium dissolution and kinetics optimization, which are essential to achieve high-performance cathodes. If an elastic protective layer with a highly conductive nature and abundant zincophilic sites could be integrated on the interfaces of the vanadium oxide, it is anticipated that both the electric conductivity and structural stability of the vanadium oxide could be enhanced. Hence, in this work, using SrVOH@PEDOT as a model system, we investigated the effects of PEDOT/Sr2+ incorporation and proposed a universal strategy for vanadium-based materials. The high-quality SrVOH@PEDOT cathode showed more robust interlayer stability coupled with a uniformly thick, highly-conductive layer. Preintercalated Sr ions functioned as pillars to stabilize the layered structure. Concurrently, the conductive polymer poly(3,4-ethylenedioxythiophene) coating on VOH isolated the cathode from water, thus suppressing specific capacity fade caused by cathode dissolution. Therefore, the SrVOH@PEDOT cathode exhibited excellent discharge specific capacity, good rate performance, and satisfactory cycling performance. It exhibited a capacity of 454 mAh g–1 at 0.5 A g–1, as well as 91.45% capacity retention after 200 cycles at 1 A g–1 and 85.2% capacity retention after 5000 cycles at 5 A g–1. The battery also possessed high energy and power densities of 342 Wh kg–1 at 376.5 W kg–1 and 182.3 Wh kg–1 at 2144.1 W kg–1. In addition, a reversible intercalation mechanism for Zn2+ was revealed by ex-situ characterization. This work presents a simple and synergistic design strategy to achieve high-quality cathodes for aqueous zinc-ion batteries.
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高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 12
·2880-2894
·
IF 7.779
Jia-Ying Zhu,Lin Cheng,Yi-Ming Zhao,Meng-Yu Li,Zi-Zhao Wang,Juan Wang,Cheng Wang,Kai-Yao Wang
Visualization of the ion exchange mechanism for 137Cs and 90Sr decontamination is important for safe radioactive liquid waste reprocessing and emergency response improvement in the event of a nuclear accident. Here, the remediation of Cs+ and Sr2+ was achieved through ion exchange using a cadmium selenidostannate, [CH3NH3]3[NH4]3Cd4Sn3Se13·3H2O (CdSnSe-1), with rapid exchange kinetics, high β/γ radiation resistances, broad pH durability and facile elution. The framework constructed from mono-lacunary supertetrahedral clusters features a great negative charge density of 3.27 × 10−3 that accounts for the superhigh exchange capacities of 371.4 (Cs+) and 128.4 mg g−1 (Sr2+). Single-crystal structural analysis on the exchanger during the “pristine–ion exchange–elution” cycle supplies instructive information to elucidate the uptake and recycle mechanism for Cs+ and Sr2+. The broken symmetry of the cluster caused by a vacant site, combined with the co-templating effects of mixed methylammonium/ammonium, contributes to the formation of voids I and II that show adsorption activity for both Cs+ and K+ ions. In comparison, the divalent Sr2+ ions with higher hydration degree exchange with (alkyl)ammonium cations in a 1 : 2 molar ratio, resulting in its location at a new void (III) closer to the framework and thus a higher binding strength. The energy variation during the adsorption process based on a DFT calculation illustrates the high efficiency of CdSnSe-1 for capture of both Cs+ and Sr2+. This “visualized” ion exchange underlines the robustness and flexibility of CdSnSe-1 as a Cs+ and Sr2+ trapper, and reveals the deeper structure–function relationship from a new surface interaction viewpoint.
研究领域:
材料科学
·
环境科学
·
核化学
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DOI
高影响因子
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