JOURNAL OF ALLOYS AND COMPOUNDS
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2015
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IF 2.999
Xiwei Liu,Jianke Sun,Kejin Qiu,Yinghong Yang,Zhongjie Pu,Li Li,Yufeng Zheng
Zn, a promising biodegradable material , possesses excellent biocompatibility and biodegradability, however its low strength and hardness largely limit its application in biodegradable implants. The addition of alloying elements would generally be suggested as an effective method for improving the mechanical properties. In the current study, alloying with a minor amount of Ca or Sr in Zn–1.5Mg alloy, the ternary alloys were composed of the matrix Zn and precipitated phase (Mg 2 Zn 11 and CaZn 13 for Zn–1.5Mg–0.1Ca alloy, Mg 2 Zn 11 and SrZn 13 for Zn–1.5Mg–0.1Sr alloy, respectively). Besides, the grain size of ternary alloys became more homogeneous and smaller than that of Zn–1.5Mg alloy. Meanwhile, the effect of alloying elements on the mechanical properties and corrosion behavior of Zn–1.5Mg alloy were analyzed. The results showed that the ternary alloys exhibited much higher yield strength (YS), ultimate tensile strength (UTS) and elongation than those of Zn–1.5Mg alloy. The measured corrosion rates of the ternary alloys were slightly increased due to galvanic corrosion reaction. Besides, a model of the corrosion mechanism in the simulated body fluid was discussed here based on the results of the studied alloys.
研究领域:
生物材料学
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生物医学工程
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金属腐蚀与防护
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可降解植入材料
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生物力学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Xuedong He,Fei Tian,Huawei Song,Chengxin Wang
Multivalent metal batteries serve as crucial complements to lithium-ion batteries. Nevertheless, fluorinated anions designed for energy storage at high voltages readily passivate the metal anodes in common ester electrolytes, particularly for Ca-metal batteries (CMBs). Ca plating/stripping can hardly occur continuously in common fluorinated calcium salt ester electrolytes due to severe corrosion at room temperature. To address the challenging issue, a uniform artificial interface of calcium fluoride nitride nanocrystals (Ca 2 NF) and amorphous organic species is engineered in the top of Ca-metal electrodes. The compact inorganic/organic hybrid solid electrolyte interphase (SEI) layer avoided the direct reaction of Ca-metal and corrosive fluorinated anions, effectively preventing the continuous passivation of Ca-metal and expediting the diffusion kinetics of calcium ions at the interface. Therefore, for the first time, stable Ca plating/stripping at 0.005 mA cm −2 over 420 h in a commercial fluorinated calcium salt ester electrolyte is achieved for the Ca-metal electrode with the protective SEI, far superior to that of mere hours for the pristine Ca-metal. The enhanced reversibility is also substantiated in Ca-metal full batteries with biomass-derived carbon cathode, delivering stable cycling performance. This work underscores the importance of interface and interphase engineering as an effective avenue for advancing the development of CMBs.
研究领域:
电化学
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能源材料
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界面科学
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储能技术
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无机非金属材料
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应用化学
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DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2020
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IF 9.567
Dongjie Liu,Xiaohan Yun,Peipei Dang,Hongzhou Lian,Mengmeng Shang,Guogang Li,Jun Lin
Recently, there has been growing interest in developing Bi3+-activated luminescence materials for optoelectronic applications. Herein, new yellow/orange-emitting ABZn2Ga2O7:Bi3+ (ABZGO, A = Ca, Sr; B = Ba, Sr) phosphors with tunable optical properties are synthesized by an alkaline earth cation substitution. When Sr2+ substitutes Ca2+ and Ba2+, the excitation wavelength has a red shift from 325 to 363 nm, matching well with the n-UV chip based white light-emitting diodes (WLEDs). CaBaZn2Ga2O7:0.01Bi3+ (CBZGO:0.01Bi3+) exhibits two evident emission peaks at 570 and 393 nm originating from the respective occupation of Ca and Ba sites by Bi3+ ions. The optical tuning of the CBZGO:Bi3+ phosphor is achieved by changing the Bi3+ doping content and excitation wavelength based on the selected site occupation. Differently, both SrBaZn2Ga2O7:0.01Bi3+ (SBZGO:0.01Bi3+) and Sr2Zn2Ga2O7:0.01Bi3+ (SZGO:0.01Bi3+) phosphors exhibit a single broad emission band, peaking at 600 and 577 nm, respectively. Two different Bi3+ sites are also verified respectively in SBZGO and SZGO hosts by the Gaussian fitting of the asymmetric PL spectra and lifetime analysis. The different luminescence behaviors of ABZGO:0.01Bi3+ phosphors should be ascribed to the synergistic effect of the centroid shift, crystal-field splitting, and Stokes shift. Moreover, the temperature-dependent PL spectra reveal that cation substitutions of Sr2+ for Ca2+ and Ba2+ can efficiently improve the thermal stability of ABZGO:0.01Bi3+ phosphors. In view of different thermal responses to various temperatures for two emission peaks of the CBZGO:0.01Bi3+ phosphor, an optical thermometer is designed and has a good relative sensitivity (Sr = 1.453% K–1) at 298 K. Finally, a WLED with CRI = 97.9 and CCT = 3932 K is obtained by combining SZGO:0.01Bi3+ and BAM:Eu2+ phosphors with a 370 nm n-UV chip, demonstrating that SZGO:0.01Bi3+ is an excellent yellow-orange-emitting phosphor for n-UV WLED devices. This work stimulates the exploration of optical tuning by cation substitution to obtain remarkable luminescence materials for optical temperature sensing and WLED applications.
研究领域:
材料科学
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光电子学
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发光与荧光粉
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固态照明
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温度传感
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Jingxin Liu,Wenjuan Zhang,Meng Mei,Teng Wang,Si Chen,Jinping Li
Arsenic (As) contamination in water is an international environmental issue. Biochar adsorption is often considered a promising way for removing As from contaminated water due to its low-cost and environmental friendliness. However, the poor adsorption capacity limits the application of pristine biochar, and various modification methods are proposed to improve this shortcoming, which inevitably brings some new environmental problems. Herein, a pristine Ca-rich biochar with excellent As adsorption performance was prepared through one-step pyrolysis of food waste digestate. The results demonstrated that the biochar obtained at 800 °C (CDBC8) exhibited higher specific surface area and absorption capacity of As than biochars prepared at other temperatures, with the maximum As adsorption capacity of 69.03 mg/g, which was much higher than most previously reported pristine biochars and even some modified biochars. This is attributed to the considerable portions of CaO and carbon in CDBC8. The adsorption process was best modeled by Langmuir model and the pseudo-second-order kinetic model. Furthermore, the removal mechanism of As was discussed in-depth. The complexation, precipitation, oxidation, and electrostatic attraction participated in the adsorption, and their contributions were significantly impacted by the pH of the solution. This work presents the great potential of this Ca-rich biochar for wastewater remediation, and also provides a feasible way for the rational utilization of food waste digestate.
研究领域:
环境科学
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水处理
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吸附技术
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废物资源化
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污染物修复
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Meng Gao,Zhichao Wang,Jincheng Liu,Xianming Xu,Guangjian Liao,Yongjun Zhang,Guanghui Zhao,Yulong Wang,Guochuan Yin
Short- to middle-length aliphatic acids have significant applications in high quality lubricant synthesis. The present work introduces a Lewis acid (LA) improved aerobic oxidation of short- to middle-length aliphatic aldehydes to the corresponding acids by the Mn(acac)2 catalyst with high efficiency. It was found that adding a modest LA such as Ca(OTf)2 could substantially improve Mn(acac)2-catalyzed aldehyde oxidations to the corresponding acids with yields up to 97%. Quenching experiments with 1,4-benzoquinone indicated that the superoxide radical plays a crucial role in catalysis. The trapping experiments with methyl p-tolyl sulfide disclosed that the content of peroxide and peracid was very limited in the reaction mixtures, and monitoring the temperature and pressure of the oxidation also showed that the reaction proceeded smoothly without obvious temperature and pressure changes, highlighting the promising advantages of this Mn(acac)2/Ca(OTf)2 catalysis in its practical applications for the middle-length aliphatic acid production from the corresponding aldehydes.
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DOI
高影响因子
Advanced Science
·
2026
·
IF 14.1
Yao Xiao,Yuxuan Yang,Haosen Qiu,Jia Yang,Hao Liang,Zhaojun Jiang,Xiao Tong,Yongying Li,Qunfeng Huang,Jiaming Wu,Tian Lin,Jiang Yu,Min Liang
Colorectal cancer (CRC) remains therapeutically challenging due to high metastasis, recurrence, and immunotherapy resistance driven by tumor microenvironment-mediated immune evasion. Immunogenic cell death (ICD) offers a promising strategy to reshape the immune microenvironment, yet existing ICD inducers suffer from poor targeting efficiency and insufficient death signal release. Here, we constructed a calcium overload-based smart nanosystem, HA-HAP@CUR, to achieve highly efficient ICD induction via a triple-effect mechanism: hyaluronic acid (HA)-mediated CD44 targeting enables tumor-selective accumulation; pH-responsive hydroxyapatite (HAP) degradation releases Ca 2+ in the acidic tumor microenvironment; and curcumin (CUR) amplifies intracellular calcium overload by promoting endoplasmic reticulum Ca 2+ release, collectively establishing a positive feedback loop disrupting calcium homeostasis. Mechanistically, calcium overload induces mitochondrial membrane potential dissipation and sustained mPTP opening, triggering mitochondrial oxidative stress and energy metabolic disorders. This mitochondrial crisis concurrently activates caspase-3, GSDMD, and RIPK1, synergistically initiating apoptosis, pyroptosis, and necroptosis, ultimately converging into PANoptosis with potent immunostimulatory potential. This strategy, encompassing targeted accumulation, calcium storm activation, and multi-modal cell death synergy, provides a biologically precise approach to overcoming immunotherapy resistance in CRC.
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DOI
PubMed
高影响因子
MOLECULES
·
2026
·Vol. 31
·期 7
·1091
·
IF 5.1
Heji Luo,Huifang Liu,Simin Liu,Haiyan Wang,Lingling Liu,Xibao Li
The development of efficient, stable, and sustainably fabricated photocatalysts for solar-driven hydrogen evolution remains a critical challenge in the field. Herein, we report a novel green coprecipitation strategy to synthesize calcium-doped zinc oxide (Ca-ZnO) nanosheets, utilizing cactus juice as a natural, multifunctional medium for the coprecipitation process. This method enables the in situ, tunable incorporation of 3–7% Ca2+ions into the wurtzite ZnO lattice without the use of harsh chemical reagents. Comprehensive characterization confirms that Ca2+substitutionally replaces Zn2+, which preserves the intrinsic crystal structure of ZnO well while inducing the formation of uniform nanosheet morphology. This doping strategy effectively modulates the electronic band structure, progressively narrowing the bandgap from 3.19 eV to 2.90 eV and significantly enhancing visible-light absorption. Crucially, the incorporation of Ca2+also generates oxygen vacancies, which serve as efficient electron traps to suppress photogenerated charge carrier recombination. The optimized 5%Ca-ZnO photocatalyst demonstrates a favorable hydrogen evolution rate of 889 μmol·g−1·h−1under full-spectrum irradiation, with stability, retaining 94.8% of its activity after four cycles. This work not only provides a high-performance material but also establishes a generalizable, sustainable paradigm for the design of advanced semiconductor photocatalysts.
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产品关联
DOI
PubMed
高影响因子
HYDROMETALLURGY
·
2026
·
IF 6.3
Junjie Xiang,Xiaozhou Zhou,Jialin Qing,Wenjuan Guan,Xinsheng Wu,Mingyu Wang,Qinggang Li,Zuoying Cao,Guiqing Zhang,Shengxi Wu
MSL255 was synthesized as a pyridyl ligand for Ni/Co extraction. • D2EHPA–MSL255 gave β(Ni/M) > 249 and β(Co/M) > 41 over impurities. • Over 99% of Ca, Mg and Mn was removed with minimal Ni loss. • Co and Ni were stepwise stripped at different acidities. • FT-IR, MS and DFT revealed selective Ni/Co coordination. Complex acidic Ni/Co liquors from low-grade ores and secondary resources usually contain abundant impurity cations, making selective Ni/Co enrichment highly challenging. Industrial routes for producing mixed sulfide precipitate (MSP) or mixed hydroxide precipitate (MHP) are technically mature, but often suffer from long flowsheets, Ni/Co losses, and impurity-rich intermediates requiring further purification. Direct solvent extraction offers a promising alternative owing to its high selectivity, efficient separation, and easy automation. However, conventional acidic organophosphorus extractants, such as D2EHPA, PC-88 A, and Cyanex 272, suffer from limited Ni/Co selectivity due to severe impurity co-extraction. Moreover, some reported synergistic systems remain constrained by insufficient acid resistance, limited loading capacity, or poor industrial applicability. To address these issues, a neutral ligand, MSL255, integrating two pyridyl groups with a hydrophobic aromatic ether framework, was designed and synthesized. When combined with D2EHPA, the optimized formulation provides pronounced synergistic enhancement, yielding synergistic factors (SF) of 87.2 for Ni(II) and 23.3 for Co(II), while impurity ions exhibit SF < 1. Correspondingly, the separation factors (β) reach β(Ni/M) > 249 and β(Co/M) > 41. The system removes more than 99% of Ca, Mg, and Mn with minimal Ni loss, and displays a clear stepwise stripping sequence in which Co is released at lower acidity whereas Ni requires higher acidity for complete stripping. Spectroscopic characterization together with DFT/ESP analysis confirms that MSL255 stabilizes Ni/Co–extractant adducts while weakening the coordination of impurity ions, thereby enhancing selectivity. Overall, the D2EHPA–MSL255 system provides a low-acidity, high-selectivity strategy for Ni/Co enrichment from Ca–Mg–Mn sulfate media.
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Jianzhi Yu,Xucong Liu,Mengjin Zhong,Shiwei Yang,Li Li,Bo Chi,Jian Pu
A reversible solid oxide cell (RSOC) can generate electricity and hydrogen, respectively, when operating in solid oxide fuel cell (SOFC) and solid oxide electrolysis cell (SOEC) modes. However, at high current densities, serious Sr segregation in the traditional La0.6Sr0.4Co0.2Fe0.8O3−δ-Gd0.1Ce0.9O2−δ (LSCF-GDC) oxygen electrode leads to a decrease in the catalytic activity of the cathode and consequently poor performance stability of RSOC. In this work, Ca doping was proposed to suppress Sr segregation in the LSCF-based composite electrodes. The smaller radius of the Ca atom could reduce the elastic driving force of Sr segregation, while the reasonable Ca-doping concentration could alleviate the steep oxygen vacancy gradient formed under high current density and thereby reduce the electrostatic driving force of Sr segregation. Consequently, after appropriate Ca substitution at the A-site, the prepared La0.6Sr0.2Ca0.2Co0.2Fe0.8O3−δ-Gd0.1Ce0.9O2−δ(LSCCF-GDC) oxygen electrode reported significantly enhanced stability during long-term operation at high current density. At 750 °C and a current density of 1.2 A·cm–2, the degradation rates of the cell with LSCCF-based composite oxygen electrode were 10 mV/100 h in SOFC mode and 17 mV/100 h in SOEC mode, which was much lower compared with the corresponding values of the cell with the traditional LSCF-based composite oxygen electrode (18 mV/100 h in SOFC mode and 82 mV/100 h in SOEC mode).
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF RARE EARTHS
·
2022
·
IF 4.632
Pan Liang,Lianqing Li,Tong Shen,Wenli Lian,Zhihong Liu
In this work, through a facile method of low-temperature (only 350 °C) self-reduction, 1D nano-sized M 2 B 5 O 9 Cl:Eu 2+ (M = Sr, Ca) blue phosphors with highly efficient performance can be obtained. The crystal structure, morphology and photoluminescence (PL) properties including thermal stability of M 2 B 5 O 9 Cl:Eu 2+ (M = Sr, Ca) phosphors were investigated. The M 2 B 5 O 9 Cl:Eu 2+ (M = Sr, Ca) phosphors show broad band excitation spectra and narrow band emission spectra . The photoluminescence quantum yields (PLQY) of M 2 B 5 O 9 Cl:Eu 2+ (M = Sr, Ca) are as high as 98% and 87.2%, respectively. Furthermore, the color purities of M 2 B 5 O 9 Cl:Eu 2+ (M = Sr, Ca) can reach 99.1% and 93.2%, respectively. When heated up to 150 °C, the emission intensities of M 2 B 5 O 9 Cl:Eu 2+ (M = Sr, Ca) phosphors can still keep 72.7% and 80.0%, respectively. Finally, the above-mentioned phosphors exhibit outstanding performance when manufacturing WLEDs.
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产品关联
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高影响因子
NanoImpact
·
2022
·
IF 6.038
Ahsan Ayyaz,Rouyi Fang,Junyi Ma,Fakhir Hannan,Qian Huang,Habib-ur-Rehman Athar,Yongqi Sun,Muhammad Javed,Shafaqat Ali,Weijun Zhou,Muhammad Ahsan Farooq
Foliar-application of nano-particles enhanced the foliar nutrient status and crop growth and yield. It is hypothesized that being second messenger molecule, supplementation of Ca 2+ via calcium nanoparticles (Ca-NPs) can trigger various signaling pathways of physiological processes which can lead to alleviate the adverse effects of drought stress on the growth of canola ( Brassica napus L.). Nano-enabled foliar-application could be an ideal strategy for advancing agricultural productivity. The present study explored the role of calcium nanoparticles ( Ca-NPs ) in alleviating drought stress in hydroponic Brassica napus ( B. napus ) plants. The foliar applied Ca-NPs were spherically shaped with an average size of 86 nm. Foliar application of 100 mg L -1 Ca-NPs enhanced biomass of canola plants and considered as optimal dose. Ca-NPs at 100 mg L −1 has a greater favorable impact on mesophyll ultrastructure, PSI and PSII efficacy, gas exchange parameters, chlorophyll content, and mineral absorption. The Ca-NPs treatment increased NPQ and Y(NPQ) under drought condition, indicating a higher PSII protective response to stressed conditions with better heat dissipation as a photoprotective component of NPQ. Ca-NPs application also reduced oxidative stress damage as measured by a reduction in reactive oxygen species (ROS) generation in terms of hydrogen peroxide and malondialdehyde (H 2 O 2 and MDA). Furthermore, Ca-NPs induced drought tolerance response corresponded to an increased in key antioxidative defense enzymes (SOD, POD, CAT, APX), as well as non-enzymatic components (protease, lipoxygenase, proline, total soluble protein contents, endogenous hormonal biosynthesis), and secondary metabolite expression in B. napus plants. Taken together, the results of this study offer new insights into the physiological and molecular mechanisms by which B. napus responds to Ca-NPs exposure.
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Handan Liu,Yanyan Liu,Dan Xu,Long Chen,Wen Guo,Tiantian Gu,Feng Yu,Gang Wang
Ti 3 C 2 T x , a member of the MXene, has attracted extensive interest because of its high conductivity, unique two-dimensional (2D) structure and intrinsic pseudocapacitance for supercapacitors. Flexible and freestanding Ti 3 C 2 T x films are promising electrodes for functioned supercapacitors used in wearable and portable electronic devices. However, the severe self-restacking of 2D Ti 3 C 2 T x nanosheets restraints their practical application. Herein, freestanding and flexible three-dimensional (3D) cross-linked Ti 3 C 2 T x -Ca-SA (sodium alginate) films with expanded Ti 3 C 2 T x interlayer spacing are reported. The expanded interlayer spacing allows more electrolyte ions to quickly intercalate providing more intercalation pseudocapacitance, while the 3D cross-linked microstructure ensures a continuous conductive network facilitating charges transport. Attributing to the unique structure, the Ti 3 C 2 T x -Ca-SA film delivers an outstanding areal capacitance (633 mF cm −2 at 5 mV s −1 ). Meanwhile, the assembled all-solid-state pseudocapacitor shows good flexibility and capacity stability under various bending conditions. The device exhibits a high energy density up to 12.6 µWh cm −2 at the power density of 375 µW cm −2 and excellent cycling stability, which are much better than prior reported state-of-the-art supercapacitors. This research exploits a simple method to optimize the structure of MXene as state-of-the-art electrodes for high-performance flexible energy-storage devices.
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PubMed
高影响因子
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