ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Haocong Wang,Wanfeng Zhu,Lanlan Xu,Jian Gong,Wenjia Li,Xiaojuan Liu
The high performance of intermediate-to-low temperature solid oxide fuel cells (ILT-SOFCs) closely depends on the catalytic activity of the cathode material. However, most high-activity perovskite cathodes are rich in Sr and will arise from Sr segregation during the long-term working, resulting in the decay of activity and stability. Herein, by regulating the calcined way and temperature, a type of self-assembled nanocomposite perovskite cathode is developed, the stoichiometric SrCo0.7Fe0.2Sc0.1O3−δ (SCFSc) powder self-separates into a cubic phase (Pm3̅m, Sc-rich) and a tetragonal phase (P4/mmm, Sc-fewer). Meanwhile, a single cubic phase is prepared with the same formula via calcining the SCFSc pellet. It is found that the nanocomposite cathode shows better oxygen reduction reaction catalytic activity than single cubic SCFSc, caused by lower impedance of oxygen surface exchange and bulk diffusion. Particularly, the nanocomposite SCFSc cathode with the self-assembled heterointerfaces mitigates the Sr segregation and shows a peak power density of 1.17 W cm–2 at 700 °C and excellent stability for ∼101 h at 600 °C. This work provides a strategy for the development of nanocomposite cathodes to mitigate cation segregation and improve catalytic activity and stability.
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
Materia-Rio de Janeiro
·
2024
·
IF 0.5
Dai Jun,Liu Yunzhao,Jiang Erhu
Tartrazine (Tz) is a widely used synthetic food colorant that has raised health concerns due to its potential adverse effects. Developing sensitive and reliable methods for Tz detection in food products is crucial for ensuring consumer safety. In this study, Sr-doped ZnO nanoparticles with varying doping levels (0–7 mol%) were synthesized by mechanical milling and applied as an electrochemical sensor for detecting Tz in sports drinks. The ZnO-Sr modified carbon paste electrode (CPE), with an optimal Sr doping level of 5 mol%, exhibited the best sensing performance under optimized conditions of pH 7.0 and an accumulation time of 180 s. The sensor demonstrated a linear range from 1 to 1000 μM, a detection limit of 0.3 μM, and a sensitivity of 0.38 μA/μM for Tz identification. This performance surpasses that of many previously reported electrochemical Tz sensors. The ZnO-Sr modified CPE showed good reproducibility (RSD 3.2%), long-term stability (91.2% current retention after one month), and high selectivity against common interferents. The sensor’s practical applicability was validated by determining Tz in commercial sports drink samples, with results in good agreement with a standard UV-Vis spectrophotometric method (relative errors < 5%). Recovery tests (97.2–103.5%) further confirmed the accuracy and reliability of the proposed sensor. This work presents a simple, sensitive, and reliable approach for monitoring Tz levels in food products, addressing important food safety and human health concerns.
研究领域:
食品科学
·
分析化学
·
材料科学
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产品关联
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2013
·Vol. 28
·期 4
·741-745
·
IF 0.484
Tao Yan,Li Dongxu,Li Yanbao
A novel calcium phosphate cement was developed by adding different amount of SrO to tetracalcium phosphate during the fabrication process. The experimental results show that compressive strength of cements based on tetracalcium phosphate doped with SrO significantly increases with the increase of SrO content, approximately 60 MPa, whilst the mechanical behavior of CPC slightly decreases if 0.7wt% SrO is added. X-ray diffraction measurement confirms the setting reaction of doped cements is similar to that of pure calcium phosphate cement (CPC). Low crystalline hydroxyapatite (HA) is found to be the main constituent of set cement. A mechanical reinforcement effect is resulted from the substitution of Sr ion to Ca 2+ in tetracalcium phosphate (TTCP), accelerating HA crystal formation and a more cross-linked cement structure. In vitro bioactivity tests showed that CPC added with 0.5wt% SrO had a more rapid degradation compared with pure CPC.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2020
·Vol. 47
·期 2
·795-811
·
IF 2.262
Chen Lei,Zuo Shiyu,Guan Zeyu,Xu Haiming,Xia Dongsheng,Li Dongya
An efficient FeOCl for persulfate (PS) and peroxymonosulfate (PMS) catalysis was synthesized by one-step method, followed by the exploration of structure and morphology using a range of techniques, such as XPS, FT–IR and SEM. Catalytic mechanism of FeOCl for PS and PMS was investigated to demonstrate its excellent catalytic performance. The results indicated that FeOCl had loose structure, large specific surface area and exposed active sites. Its strong Fe–O and Fe–Cl bonds could promote electron transfer, thereby accelerating the reduction of Fe 3+ and improving the catalytic rate and utilization rate of oxidants. Since FeOCl had unique and superior structure, it could be used to catalyze 2 persulfates PS and PMS to degrade tetracycline hydrochloride (TTCH) and had good degradation efficiency and degradation stability. When prepared at 250 °C, FeOCl had the best catalytic performance. After 60 min, the degradation rate of TTCH under FeOCl/PS system was 78%, and under FeOCl/PMS system was 81%. After ten cycles, the degradation rate of TTCH still reached 80%. And this catalytic system had wide adaptability to pH. This work highlighted the catalytic versatility of FeOCl in persulfate and proved its application in the treatment of toxic organic wastewater through actual wastewater treatment experiment, which provided a scientific basis for enhancing catalytic performance of FeOCl. Graphic abstract
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DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Dilare Halmurat,Xinyu Zhang,Litipu Aihaiti,Rong-Jun Xie
Eu 2+ -doped phosphors show broadband absorption, tunable emission and high quantum efficiency due to the parity-allowed 5d→4f transitions, allowing them to be used in solid-state lighting. To expand their applications in other fields such as detection and sensing technologies, the Eu 2+ emission needs to be tuned into the near-infrared region, but it is a big challenge to obtain Eu 2+ near-infrared region emitters due to the absence of host compounds with extremely large crystal-field splitting. In this work, we chose M 4 Li(BN 2 ) 3 (M = Ca, Sr, Ba) as a host and realize the near-infrared region emission of Eu 2+ in it. Among these phosphors, Ba 4 Li(BN 2 ) 3 :Eu 2+ exhibits the longest emission of 880 nm and the largest full-width at half maximum of 276 nm under 450 nm excitation, while Ca 4 Li(BN 2 ) 3 :Eu 2+ and Sr 4 Li(BN 2 ) 3 :Eu 2+ emit at 740 and 680 nm, respectively. We observe an interesting phenomenon that the energy shift of emission is linearly related to the radius difference between the alkaline earth cation and the activator Eu 2+ in this system.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2025
·Vol. 334
·期 2
·1287-1297
·
IF 1.6
Li Yifan,Cao Shuang,Yang Qingming,Wang Yuannuo,Wang Jingyang,Jiao Caishan,Zhang Meng,Zhang Lei
The removal of Cs and Sr from high level radioactive waste is very important for ecological protection. However, simultaneous immobilization of Cs and Sr is rarely reported. In this work, a perovskite structure CsSr 2 Ta 3 O 10 was synthesized by molten salt method. CsSr 2 Ta 3 O 10 has good thermal stability up to 900 °C at least. Under the γ irradiation of Co-60, most of the material maintained its structural integrity. CsSr 2 Ta 3 O 10 demonstrates a wide range of pH durability, where Cs is stable in the pH range from 4 to 12 and Sr from 2 to 12. Its frame structure remains stable in the pH range from 2 to 12 and will not be decomposed. Further sintering of CsSr 2 Ta 3 O 10 ceramic waste forms results in a high density of 93% − 95%. Moreover, leaching experiments conclude that the long-term leaching rates of Cs and Sr begin to stabilize after 14 days, reaching the order of 10 0 and 10 −3 g·m −2 ·d −1 . These results provide a possibility for the simultaneous immobilization of Cs and Sr.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xiaoshuai Zhang,Wen Xiong,Chengrun Liu,Zixuan Wang,Xiaoyan Yu,Xiaojie Li,Guodong Zhang,Panlai Li,Zhijun Wang
Exploring oxide-based deep red light-emitting phosphors is crucial for indoor plant lighting applications. In particular, designing Eu 2+ deep red emission in inorganic solids is challenging. In this paper, a cation substitution strategy was used to replace the Ca 2+ ions in the matrix with a certain concentration of Sr 2+ ions. A series of spectrally red-shifted Ca 1-x Sr x Sc 2 O 4 :Eu 2+ deep red phosphors were obtained under 460 nm light excitation. The substitution of Sr 2+ ions changes the local crystal field environment of Eu 2+ . The spectral shift from 656 nm to 702 nm was achieved by changing the centroid shift, the degree of polyhedral distortion and the lattice disorder. Combined with the need for practical applications, Ca 0.5 Sr 0.5 Sc 2 O 4 :0.01Eu 2+ phosphor and blue chip have been made into phosphor-converted light-emitting diodes for plant lighting, and the results of plant lighting experiments show that Ca 0.5 Sr 0.5 Sc 2 O 4 :0.01Eu 2+ phosphor has a certain application potential in plant lighting. In addition, this study will guide the exploration of new oxide-based deep red phosphors with Eu 2+ activation and for the realization of tunable emission through cation substitution.
研究领域:
材料科学
·
光学工程
·
植物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2020
·
IF 6.155
Shuaihang Qiu,Mingliang Li,Gang Shao,Hailong Wang,Jinpeng Zhu,Wen Liu,Bingbing Fan,Hongliang Xu,Hongxia Lu,Yanchun Zhou,Rui Zhang
A novel entropy-stabilized (ES) (Ca,Sr,Ba)ZrO 3 ceramic has been designed and synthesized by pressureless sintering of CaZrO 3 , SrZrO 3 and BaZrO 3 powders mixtures at 1450 °C, 1500 °C and 1550 °C for 3 h. X-ray diffraction, scanning electron microscopy and transmission electron microscopy analyses collectively indicate that a single solid solution is formed with a homogeneous distribution of metal elements after sintering at 1550 °C. The relative density and hardness of the ES (Ca,Sr,Ba)ZrO 3 ceramic sintered at 1550 °C are 97.79 % and 10.84 ± 0.33 GPa, respectively. This ES (Ca,Sr,Ba)ZrO 3 exhibits lower thermal conductivity from 373 K to 1073 K than their constituting zirconates , CaZrO 3 , SrZrO 3 and BaZrO 3 . Most importantly, the ES (Ca,Sr,Ba)ZrO 3 ceramic possesses good corrosion resistance to TiNi alloy melt and no distinct reaction layer exists between TiNi alloy and ES (Ca,Sr,Ba)ZrO 3 ceramic in the contact region. The combination of these properties indicates that ES (Ca,Sr,Ba)ZrO 3 ceramic is promising for use as a novel crucible material for the melting of titanium alloys .
研究领域:
材料科学
·
陶瓷
·
冶金学
·
热工工程
✓ 已验证
DOI
高影响因子
Advanced Electronic Materials
·
2019
·Vol. 5
·期 3
·1800707
·
IF 6.312
Longfei Song,Linqu Luo,Xuan Li,Di Liu,Ning Han,Lei Liu,Yuanbin Qin,Johnny C. Ho,Fengyun Wang
Although In 2 O 3 nanofibers (NFs) are considered as one of the fundamental building blocks for future electronics, the further development of these NFs devices is still seriously hindered by the large leakage current, low on/off current ratio ( I on / I off ), and large negative threshold voltage ( V TH ) due to the excess carriers existed in the NFs. A simple one-step electrospinning process is employed here to effectively control the carrier concentration of In 2 O 3 NFs by selectively doping strontium (Sr) element to improve their electrical device performance. The optimal devices (3.6 mol% Sr doping concentration) can yield the high field-effect mobility (μ fe ≈ 3.67 cm 2 V −1 s −1 ), superior I on / I off ratio (≈10 8 ), and operation in the energy-efficient enhancement-mode. High-κ Al 2 O 3 thin films can also be employed as the gate dielectric to give the gate voltage greatly reduced by 10× (from 40 to 4 V) and the μ fe substantially increased by 4.8× (to 17.2 cm 2 V −1 s −1 ). The electrospun E-mode Sr-In 2 O 3 NF field-effect transistors (NFFETs) can as well be integrated into full swing of inverters with excellent performances, further elucidating the significant advance of this electrospinning technique toward practical applications for future low-cost, energy-efficient, large-scale, and high-performance electronics.
研究领域:
材料科学
·
纳米电子学
·
薄膜器件
·
半导体掺杂
·
晶体管技术
✓ 已验证
DOI
高影响因子
OPTICS EXPRESS
·
2013
·Vol. 21
·期 13
·15728-15733
·
IF 3.546
Renping Cao,Fangteng Zhang,Chenxing Liao,Jianrong Qiu
RF2:Bi (R = Ca and Sr) phosphors were synthesized by solid state reaction method in air and their luminescence properties were investigated. Broad yellow-to-orange emissions peaking at ~550 nm (CaF2:Bi) and ~600 nm (SrF2:Bi) were observed under ~260 nm excitation. The emission centers inRF2:Bi (R = Ca and Sr) phosphors are Bi2+ ions, and the excitation and emission bands ofRF2:Bi (R = Ca and Sr) phosphors can be attributed to 2P1/2→2S1/2 and 2P3/2(1) →2P1/2 transitions of Bi2+ ions, respectively. The phosphors are promising for application in lighting due to broad yellow-to- orange emission.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2021
·
IF 4.094
Qiuhua Yuan,Ziqiang Zhang,Yuan Yang,Youliang Jian,Ruilong Li,Xiaoyi Dai,Wenshan Wu,Junxi Zhong,Chen Chen
Hydroxyapatite (HA) is widely used in bone repair and regeneration because of its composition and structure similar to human bone. However, the artificially synthesized HA has poor mechanical properties , so it is often necessary to add a second phase to the powder as a supporting phase to enhance its mechanical properties. Strontium (Sr) has the properties of promoting the growth of bone cells, which can increase bone formation in the body and reduce bone self-absorption. Nevertheless, Sr-doped HA composites have been rarely reported in the literature in recent years. In this paper, Sr-doped HA was employed to be complexed with chitosan (CS) for the first time to prepare a composite coating that is dense and uniform, with good adhesion and ductility, in order to expand its clinical applications. Therefore, a series of HA samples doped with different Sr mole fraction (0 mol% (pure HA), 0.5 mol%, 1 mol%, 2 mol%, 4 mol%) were prepared by chemical precipitation method. Then the HA/CS composite coating doped with Sr was prepared on the stainless steel substrate by spin-coating technology. The results showed that Sr 2+ ions had replaced part of Ca 2+ ions and have been successfully doped into the HA lattice. The synthesized HA particles showed a shortrod-like morphology, and the substitution of Sr ions promoted the growth of Sr-doped HA crystals and increased its grain size . In addition, the synthesized Sr-doped HA/CS composite coating is dense and uniform. In vitro cell culture experiments showed that all composite coatings have good biocompatibility. The HA/CS coating with 4 mol% Sr ion doping is more conducive to cell proliferation , adhesion and osteogenic differentiation.
研究领域:
材料科学
·
生物材料
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2016
·Vol. 45
·期 16
·7124-7130
·
IF 4.177
Li-Jun Zhang,Yan-Yan Li,Peng-Fei Liu,Ling Chen
New borophosphates Li3Cs2M2B3P6O24 (M = Pb, Sr) have been synthesized by high-temperature solid-state reactions. The single-crystal X-ray diffraction data reveal their non-centrosymmetric cubic space group P213 and lattice parameters of a = 12.7246(3) Å and 12.687(2) Å and V = 2060.31(8) Å3 and 2042.3(4) Å3 for Li3Cs2Pb2B3P6O24 and Li3Cs2Sr2B3P6O24, respectively. They are three-dimensional (3D) [BP2O8]3−∞ anionic frameworks formed by a new double six-membered ring building unit consisting of BO4 and PO4 units joined alternately. Interestingly, such a double six-membered ring is regarded as the structural variation of the 12-membered ring in the known KSrBP2O8, fusing at the BO4 tetrahedron induced by the coexistence of the Li+ and Cs+ cations with their large size difference. The title compounds show weak SHG intensity and exhibit photoluminescence emissions at 410 nm for Li3Cs2Pb2B3P6O24 and 440 nm for Li3Cs2Sr2B3P6O24.
研究领域:
材料科学
·
晶体学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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