Journal of Materials Chemistry B
·
2026
·
IF 6.2
Xiao-Dan Li,Dawei Yan,Haohao Ren,Hai-Tao Peng,Kun Zhao,Qiyi Zhang,Yong-Gang Yan
Incorporating strontium into bone cement is an effective way for bone repair. Macrophages play an essential role during implant osseointegration. However, whether carboxymethyl cellulose (CMC) modifying Sr-doped bone cement can jointly enhance M2 polarization and osteogenic differentiation remains unknown. To further explore this hypothesis, we introduced CMC into the hydration process of calcium sulfate hemihydrate, strontium oxide, and calcium phosphate monobasic monohydrate to form biodegradable composite bone cement (CMC/SPC). The operability and physicochemical properties of CMC/SPC can be adjusted by formulation parameters, including CMC content and the corresponding L/P ratio required for paste formation. In vitro and in vivo experiments showed that 40%CMC/SPC induced anti-inflammatory M2 macrophage phenotypes and degraded approximately 90% in vivo within 12 weeks. 40%CMC/SPC extracts upregulated the expression of osteogenesis-related genes. Micro-CT and histological analysis revealed that 40%CMC/SPC had superior bone regeneration without significant systemic toxicity in vivo. Overall, the present study indicates that CMC/SPC may provide a favorable microenvironment associated with anti-inflammatory macrophage polarization and enhanced bone formation, suggesting its potential as a candidate material for bone defect reconstruction.
✓ 已验证
DOI
PubMed
高影响因子
Science China-Materials
·
2021
·Vol. 64
·期 7
·1621-1631
·
IF 8.273
Wang Wenjie,Tian Yunfeng,Liu Yun,Abhishek Nalluri,Li Yitong,Chi Bo,Pu Jian
Sr-Co containing perovskite oxides are prospective air electrode candidates for reversible solid oxide cells (RSOCs). However, their efficiencies are limited by Sr segregation and the high thermal expansion coefficient (TEC) of Co-based perovskites. Herein, La 0.6 Ca 0.4 Fe 08 Ni 0.2 O 3− δ (LCaFN) is tailored as an Sr-Co-free perovskite air electrode for highperformance RSOCs. Compared with La 0.6 Sr 0.4 Fe 0.8 Ni 0.2 O 3− δ (LSFN) and La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3− δ (LSCoF), LCaFN has a high electrical conductivity (297 S cm −1 ), TEC compatibility (11.2 × 10 −6 K −1 ) and improved chemical stability. Moreover, LCaFN has high oxygen reduction reaction (ORR) activity with a low polarization resistance (0.06 Ω cm 2 ) at 800°C. A single-cell Ni-YSZ/YSZ/gadolinium-doped ceria (GDC)/LCaFN-GDC operated at 800°C yields a maximum power density of 1.08 W cm −2 using H 2 as fuel. In the solid oxide electrolysis cell (SOEC) mode, the cell can achieve a current density of approximately 1.2 A cm −2 at 1.3 V with 70% humidity at 800°C. The cell exhibits good reversibility and remains stable in continuous SOEC and solid oxide fuel cell (SOFC) modes. These findings indicate the potential application of LCaFN as an air electrode material for RSOCs.
研究领域:
材料科学
·
能源技术
·
电化学
·
陶瓷学
·
燃料电池
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
He-Di Yang,Sheng-Hua Zhou,Mao-Yin Ran,Xin-Tao Wu,Hua Lin,Qi-Long Zhu
Oxychalcogenides have gained widespread attention as promising infrared nonlinear optical (IR-NLO) candidates. However, high-performance oxychalcogenides have rarely been reported in the ultraviolet (UV) region owing to the low energy gaps (Eg < 4.0 eV). Herein, two non-centrosymmetric (NCS) oxychalcogenides with one-dimensional (1D) chain structures and wide Eg (>4.3 eV), namely, AEGeOS2 (AE = Sr and Ba), have been discovered by combined experiments and theory calculations as a new source of UV-NLO materials. Significantly, they exhibit excellent comprehensive performance comparable to the commercial UV-NLO material KH2PO4 (KDP), including large phase-matching ranges (>380 nm), sufficient second harmonic generation intensities (0.7–1.1 × KDP), high laser-induced damage thresholds (1.2 × KDP), wide transparent regions (0.26–12.2 μm), and good thermal stability (up to 1100 K). Moreover, systematic structure–activity relationship analysis illustrates that the 1D homochiral helical [GeOS2]2– chains composed of heteroanionic [GeS2O2] units make major contribution to the desirable UV-NLO performance. This work makes the two compounds shine out as new energy in the UV-NLO field and offers a new perspective for the exploration of structure-driven functional oxychalcogenides.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2022
·Vol. 12
·期 22
·2200392
·
IF 29.698
Peng Zhong,Kazuaki Toyoura,Lulu Jiang,Lubing Chen,Sara Adeeba Ismail,Naoyuki Hatada,Truls Norby,Donglin Han
A significant hydration and protonic conduction in La 2 NiO 4+ δ -based Ruddlesden–Popper (RP) oxides will enable their use as positrode materials in proton ceramic electrochemical cells (PCECs). Unlike perovskite electrolytes and positrode materials, where protons reside and jump on regular oxide ions, RP oxides such as La 2 NiO 4+ δ may contain oxygen interstitials and offer the possibility that protons locate on and migrate by help of these, suggesting a mechanism by which positrodes may operate by triple conduction. Here, theoretical calculations that support proton migration between interstitial oxide ions in the rock-salt layer via unshared oxide ions in the perovskite layer are reported. Furthermore, water contents of pristine La 2 NiO 4+ δ and La 2- x A x NiO 4+ δ ( A = Ca, Sr, Ba) are reported, showing that hydration increases with the level and basicity of the dopant. Hebb-Wagner blocking electrode measurements show significant partial protonic conductivity in all samples. The effects of doping on hydration and of p H 2 O on the p-type conductivity suggest that protons reside primarily on structural oxide ion, but a role of interstitial oxide ions for dissolution and migration of protons cannot be ruled out in cases with oxygen excess. The results are instructive for further studies and optimization of RP oxides as potential positrode materials for PCECs.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Jia Li,Yimin Tang,Xiuwen Wang,Wei Kan,Libin Yang,Xin Jiang,Yukihiro Ozaki,Xiaoxia Han,Bing Zhao
Surface oxygen vacancy defects and energy band defects can be synchronously regulated to accelerate the charge transfer in a semiconductor–molecule system for boosting the surface-enhanced Raman scattering (SERS) performance of a semiconductor. Herein, alkaline earth metal Sr with a low electronegativity and a large atomic radius was selected as a dopant to prepare a Sr-doped TiO2 (SrnTiO2) SERS substrate, in which a simple Sr doping achieves a synchronous regulation of double defects (i.e., surface oxygen vacancy defect and energy level defect of Ti) in TiO2. Abundant surface oxygen vacancies and defect energy levels of Ti are jointly responsible for the greatly enhanced SERS performance of the substrate. On the optimal substrate Sr0.0100TiO2, the minimum detection limit of a nonresonance molecule, 4-mercaptobenzoic acid, can reach 1 × 10–9 M, and the enhancement factor is as high as 9.3 × 106. To the best of our knowledge, this is the highest SERS activity among the reported semiconducting substrates, even comparable to those of precious metals. Moreover, the SrnTiO2 substrate shows an excellent spectral reproducibility and ultrahigh stability, which can withstand the corrosions of strong acid and alkali and even can resist the oxidation of high temperatures for SERS detection.
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Jiawen Ai,Weize Zhao,Quan Yu,Xiang Qian,Jianhua Zhou,Xinming Huo,Fei Tang
The mass spectrometer is an important tool for modern chemical analysis and detection. Especially, the emergence of miniature mass spectrometers has provided new tools for field analysis and detection. The resolution of a mass spectrometer reflects the ability of the instrument to discriminate between adjacent mass-to-charge ratio ions, and the higher the resolution, the better the discrimination of complex mixtures. Quadrupole ion traps are generally considered as a low-resolution mass spectrometry method, but they have gained wide attention and development in recent years because of their suitability for miniaturization and high qualitative capability. For an ion trap mass spectrometer, the mass sensitivity and resolution can be mutually constrained and need to be balanced by setting an appropriate scanning speed. In this study, a super-resolution U-net algorithm (SR-Unet) is proposed for ion trap mass spectrometry, which can estimate the possible ions from the overlapping ion peaks of low-resolution spectra and improve the equivalent resolution while ensuring sufficient sensitivity and analysis speed of the instrument. By determining the mass spectra of a linear ion trap mass spectrometer (LTQ XL) in Turbo and Normal scan modes, the same unit mass resolution as that at a scan speed of 16,667 Da/s was successfully obtained at 125,000 Da/s. Also, the experiments demonstrated that the algorithm is capable of the mass-to-charge ratio and instrument migration. SR-Unet can be migrated and applied to a miniature mass spectrometer for cruise detection of volatile organic compounds (VOCs), and the identification of VOC species in Photochemical Assessment Monitoring Stations (PAMS) was improved from 31 to 50 species with the same monitoring and analysis speed requirement. Further, super-unit mass resolution peptide detection was achieved on a miniature mass spectrometer with the help of the SR-Unet algorithm, which reduced the full width at half-maxima (FWHM) of bradykinin divalent ions (m/z 531) from 0.35 to 0.15 Da at a scan speed of 375 Da/s and improved the equivalent resolution to 3540. The proposed method provides a new idea to enhance the field mixture detection capability of miniature ion trap mass spectrometers.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Leyu Shen,Zhihong Du,Yang Zhang,Xu Dong,Hailei Zhao
Medium-entropy perovskites Sr(Fe α Ti β Co γ Mn ζ )O 3- δ (SFTCM) are investigated as potential cathodes for intermediate temperature solid oxide fuel cell (IT-SOFC). The effects of entropy on crystal structure, thermal expansion coefficients (TEC), electrical conductivity, oxygen surface exchange and bulk diffusion coefficients, electrochemical performance, and long-term stability of SFTCM are systematically investigated. High entropy facilitates the diffusion of oxygen ions but hinders the transmission of electrons. The SFTCM with higher entropy shows a lower TEC, displays suppressed strontium surface segregation, and delivers more stable polarization resistance. Although the catalytic activity towards oxygen reduction reaction was slightly reduced, the maximum power density of the LSGM-supported (250 μm) single cell with SrFe 0.25 Ti 0.25 Co 0.25 Mn 0.25 O 3- δ cathode can still reach 0.85 W cm −2 at 800 °C. All these results suggest that the medium-entropy SFTCM perovskites can be promising cathodes materials for IT-SOFC.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2020
·
IF 4.495
Junlei Qi,Qian Liu,Minghe Cao,Yan Zhao,Hua Hao,Zhonghua Yao,Hanxing Liu
Discovering new materials with high breakdown strength is of great significance for scientific research and industrial applications. Here, we combine experiments and density functional theory (DFT) calculations to report a systematic study of two titanosilicates - A 2 TiSi 2 O 8 (A = Br, Sr) as a family of functional materials with wide band gaps, ultrahigh breakdown strength, and high thermal stability. The A 2 TiSi 2 O 8 materials possess ultrahigh electric breakdown ( E b > 200 kVmm −1 , at 200 ℃), and good temperature stability (the variation of capacitance 3 %, from −100 to 200 ℃). DFT results show that electrons are likely localized in the Si O and Ti O polyhedrons. The electron difference density map and density of states (DOS) results elucidate the wide band gaps in titanosilicate family due to the strong Si O and Ti O bonds, indicating that the semiconductive behaviors are similar. The temperature-dependent structural evolution (from −100 to 500 ℃) is investigated via in-situ Raman spectroscopy .
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2019
·Vol. 49
·期 2
·1043-1050
·
IF 1.676
Jiao Yunpeng,Han Yinghui,Pang Yiheng,Zhou Junxiu,Qi Xiaohan,Liu Yunpeng
Abstract Some kinds of the plate-like hexagonal layered double complex hydroxides (named Ni-Fe-Sr-LDHs) materials were prepared for energy storage electrodes in this work. It showed good properties with energy densities and cycle life through the electrochemical tests. At 1 A g −1 current density, the specific capacitance of the electrode reached 311.02 F g −1 when the electrolyte was 6 M LiOH. In the long cycle test, the capacitance retention of the electrode maintained at 73.16% after 2000 cycles (current density: 1 A g −1 ). The morphologies of Ni-Fe-Sr-LDHs were characterized via the scanning electron microscope, transmission electron microscopy and x-ray powder diffraction. The prepared layered double hydroxides were further optimized by doping carbon nanotubes (CNTs). The optimal weight ratio of Ni-Fe-Sr-LDHs to CNTs was 3:1. The specific capacitance in the measurement of galvanostatic charge–discharge increased to 438.74 F g −1 , and the stability of long-term cycling was raised to 77.45%. These results indicated that Ni-Fe-Sr-LDHs combined with CNTs would be an ideal electrode material for practical energy storage. Graphic Abstract
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 33
·17417-17425
·
IF 7.443
Rui Tang,Longwei Yin
We present a novel Sr-doped TiO2/SrTiO3 nanorod array heterostructure for dye-sensitized solar cells (DSSCs) via a facile two-step hydrothermal process, with a tunable microstructure, optical response and photoelectrical conversion properties. The chemical composition components and microstructures of Sr-doped TiO2/SrTiO3 nanorod array heterostructures are investigated using XRD, XPS, SEM and TEM characterization techniques, respectively. It is shown that the treatment of rutile TiO2 nanorod arrays in Sr(NO3)2 solution results in the self-doping of Sr into the lattice of TiO2 and formation of Sr-doped TiO2/SrTiO3 nanorod array heterostructures, inducing a transition of optical response properties from the ultraviolet region to the visible region. The photogenerated electrons and holes can be effectively separated due to the formation of SrTiO3/Sr-doped TiO2 heterostructures with a uniquely matched band-gap energy structure, resulting in greatly enhanced photoelectric conversion efficiency performance. Electrochemical impedance spectroscopy and photoluminescence results show that the formation of Sr-doped TiO2/SrTiO3 heterostructures can effectively prolong the charge carrier lifetime. The dye loading capacity on the Sr-doped TiO2/SrTiO3 heterostructures can be improved through the functionalization bonding of the hydroxide group on the surface of the electrode material. DSSCs based on the optimized Sr-doped TiO2/SrTiO3 heterostructure photoanode achieve the highest energy conversion efficiency of 4.70% (one sun illumination), nearly 1.5 times higher than the bare rutile TiO2 photoanode (3.10%).
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Lisha Zhang,Yudong Ji,Weidong Li,Bing Zhang,Qiang Ma,Bowen Qin,Yilei Zhang,Dan Yue,Zhenling Wang
Lanthanide ions-doped fluoride nanocrystals have excellent application prospect. However, low photoluminescence quantum yield (PLQY) is usually along with lanthanide ions-doped fluoride nanocrystals owing to their low molar absorptivity and narrow absorption band . In order to increase the absorption cross section of Ln 3+ in fluoride nanocrystals, a facile synthesis strategy to enhance luminescence of AF 2 : Ln 3+ (A = Ca, Sr; Ln = Eu, Tb) by the use of carbon dots (CDs) has been developed in this work. A series of characterizations including TEM , XRD , FTIR and XPS demonstrated that the CDs have been successfully combined with the surface of AF 2 : Ln 3+ nanocrystals. The combination of CDs has little influence on the microstructure and phase structure of AF 2 : Ln 3+ , and CDs@AF 2 : Ln 3+ nanocrystals have uniform and regular shape with cubic phase. CDs are used as a broadband sensitizer and lead to the broadband excitation of Ln 3+ , resulting in the enhancement around 10-fold of Ln 3+ luminescence emission in AF 2 : Ln 3+ nanocrystals after CDs combination. The corresponding PLQY increases almost three times, and the luminescence enhancement mechanism by combining CDs is proposed. In addition, the CDs@AF 2 : Ln 3+ nanocrystals are used to prepare CDs@AF 2 : Ln 3+ /PVA films, which exhibits excellent luminescence properties under the excitation of UV light . This work provides a superior method for enhancing the luminescence properties of lanthanide ions-doped nanocomposites and demonstrates practical potential as promising candidates for light-converting thin films .
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Chen Wang,Xing-Jing Zhang,Li−Na Zhao,Ting Zhang,Feng-Ying Bai,Li-Xian Sun,Yong-Heng Xing
The abuse and excessive discharge of organic pollutants such as nitroaromatic compounds (NACs) have become a hot topic of concern for all humanity and society, and the development of fast, effective, and targeted technical means for detecting NACs also faces many challenges. Here, we reported a strontium-based metal–organic framework (MOF) {[Sr2(tcbpe)(H2O)4]}n (Sr-tcbpe), in which tcbpe represents deprotonated 4′,4‴,4″‴,4‴‴-(ethene-1,1,2,2-tetrayl)tetrakis(([1,1′biphenyl]-4-carboxylic acid)). In Sr-tcbpe, Sr–O polyhedron and deprotonated tcbpe4– ligand have a staggered connection to form a self-assembled three-dimensional network structure. In addition, it is found that Sr-tcbpe undergoes no luminescent color change when grinding under solvent protection, while mechanochromic fluorescence behavior is observed when grinding directly, leading to luminescent color changes from cyan to green (Sr-tcbpe-G). Additionally, Sr-tcbpe and Sr-tcbpe-G could selectively detect PNP, DNP, and TNP, and Sr-tcbpe achieves visual fluorescence sensing detection toward TNP at a limit of detection as low as 2.25 μM. Moreover, during the detection process, unexpectedly, TNP exhibits a selective etching effect on Sr-tcbpe, which could drill nano holes with different sizes on the surface area of MOF materials to a certain extent, achieving the conversion of chemical energy to mechanical energy. In addition, the successful preparation of a portable sensor Sr-tcbpe@gypsum block provides a platform for the perfect combination of mechanochromic fluorescence behavior and visualization detection toward TNP. It lays the foundation for the practical application of MOF materials in daily life.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）