MATERIALS LETTERS
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2014
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IF 2.269
Fuyou Liao,Lili Zhao,Chunxue Zhai,Zhiyong Zhang,Xiaolei Ma
SrCO 3 particles were prepared at 450–600 °C by a simple solution method. The phase structure, morphologies and photoluminescence (PL) properties of particles were investigated. All of the as-synthesized samples are orthorhombic SrCO 3 phase. SrCO 3 particles are composed of fibers aggregates and have layered morphologies. When excited by an appropriate wavelength, a broad emission band can be observed in the samples ranging from ultraviolet to red light region. The PL properties of samples were significantly affected by the fibers. SrCO 3 particles with fine and short fibers structure have excellent PL properties. In our experiment, SrCO 3 particles synthesized at 450 °C exhibit the strongest PL properties.
研究领域:
材料科学
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光学
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DOI
高影响因子
MATERIALS RESEARCH BULLETIN
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2011
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IF 2.146
Yannan Xue,Xiaolei Ren,Xuefeng Zhai,Min Yu
Well-crystallized flower-like SrCO 3 :Tb 3+ phosphors have been synthesized by an inexpensive and friendly solvothermal process using polyvinylpyrrolidone (PVP, K30) as an additive without further annealing treatment. X-ray diffraction (XRD), Fourier transform-infrared spectroscopy (FT-IR), and field emission scanning electron microscopy (FESEM) as well as photoluminescence spectroscopy (PL) were used to characterize the resulting samples. The amount of PVP and the reaction time have strong effect on the morphology of the SrCO 3 :Tb 3+ particles. The results of XRD confirm the formation of a well-crystallized SrCO 3 phase with an orthorhombic structure. The possible formation mechanism for flower-like SrCO 3 :Tb 3+ phosphor is proposed. The SrCO 3 :Tb 3+ phosphors show the characteristic 5 D 4 – 7 F J ( J = 6, 5, 4, 3) emission lines with green emission 5 D 4 – 7 F 5 (544 nm) as the most prominent group under ultraviolet excitation.
研究领域:
材料科学
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光学
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DOI
高影响因子
Surfaces and Interfaces
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2025
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IF 6.3
Yi Zhu,Xu Xiang,Gengguang Luo,Tao Zhang,Ying Li,Ju Gao,Wenlin Wang,Tianyin Huang,Hongfang Zhang
Water contamination by organic pollutants, such as dyes, poses significant environmental and health risks, necessitating the development of efficient and sustainable degradation methods. Tribocatalysis, utilizing mechanical energy to generate reactive triboelectrons, presents an effective approach under ambient conditions with or without external illumination. In this work, SrCO₃–SrTiO₃ (SCO@STO) composite catalysts were synthesized via conventional ceramic processing, with sintering temperatures adjusted (1000 °C and 1150 °C) to control lattice strain and oxygen vacancy concentrations. Experimental results showed that these sintering conditions significantly influenced the catalytic performance. Specifically, STO(A)‒1000 exhibited superior degradation efficiency under illumination due to abundant oxygen vacancies extending photogenerated carrier lifetimes and synergistically enhancing photocatalysis combined with triboelectrons from mechanical stirring, achieving nearly complete degradation of methylene blue (MB, 97 %) within 1 hour. Conversely, STO(A)‒1150 demonstrated higher catalytic performance in dark conditions, attaining 100 % degradation of Rhodamine B (RhB) within 48 h, primarily due to enhanced strain-induced triboelectric charge generation. The interplay among band alignment, oxygen vacancies, and lattice strain in SCO@STO composites highlights a versatile strategy for optimizing organic pollutant degradation under diverse environmental conditions, advancing effective environmental remediation.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
COMPOSITES PART B-ENGINEERING
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2025
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IF 14.2
Jianhang Du,Xiaogang Bao,Jing Wen,Chen Tang,Chenxu Wang,Changgui Shi,Chengqing Yi,Guohua Xu,Dejian Li
Bone defects caused by osteoporosis present a significant clinical challenge. The primary obstacles to osteoporotic bone regeneration are the persistent decline in osteogenic differentiation potential of bone marrow mesenchymal stem cells (BMSCs) and the abnormally high activity of osteoclasts. Emerging research highlights the crucial role of immunomodulation in osteoporosis. Harnessing the immunomodulatory capabilities of bioactive materials to improve the compromised osteoporotic microenvironment may enhance the osteogenic differentiation potential of BMSCs while reducing osteoclast differentiation and resorption. This strategy offers promising avenues for treating osteoporotic bone defects. In this study, we developed an innovative 3D-printed SrCO 3 @PCL/PDA composite scaffold. Through 3D printing, the polycaprolactone (PCL) matrix was customized to achieve biomimetic structural and mechanical design. The introduced strontium carbonate (SrCO 3 ) allows for the responsive release of Sr 2+ ions in the acidic osteoporotic microenvironment, suppressing osteoclast activity and maintaining a regenerative-friendly environment. The polydopamine (PDA) coating enhances the biocompatibility of the scaffold, thereby promoting cell adhesion and proliferation on its surface. Notably, this novel composite scaffold effectively promotes macrophage polarization towards the M2 phenotype rather than the M1 phenotype, exerting an immunomodulatory effect that improves osteoporotic bone regeneration. In vivo experiments further validated our hypothesis. This innovative composite scaffold offers a promising strategy for the comprehensive treatment of osteoporotic bone defects.
研究领域:
生物材料学
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骨科医学
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免疫学
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DOI
高影响因子
RSC Advances
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2015
·Vol. 5
·期 71
·57482-57489
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IF 3.84
Qianchun Zhang,Feifei Meng,Lin Zha,Xingyi Wang,Guoyi Zhang
In this paper, we developed a cataluminescence-based sensor using SrCO3/graphene for sensitive and selective detection of n-propanol. The composite was characterized by X-ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy, and gas adsorption. The sensor was coupled with a miniature vaporizing device to detect n-propanol in liquid samples. The experimental results revealed that the SrCO3/graphene sensor exhibited a sensitivity for n-propanol 5.8 times higher than that of pure SrCO3, indicating that the sensitivity of the SrCO3/graphene sensor was increased by adding graphene to SrCO3. The linear range of the sensor was 0.2 to 32 mg L−1 (r = 0.9987) with a limit of detection of 0.08 mg L−1. The sensor showed a rapid response of 2 s and a recovery time of 20 s, respectively. The sensor was used to analyze samples spiked with known concentrations of n-propanol. The concentrations of n-propanol in all samples were well quantified with satisfactory recoveries, indicating that the SrCO3/graphene sensor is a promising candidate for fast, sensitive, selective detection of n-propanol. We also discuss the possible mechanism based on the reaction products.
研究领域:
分析化学
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材料科学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
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IF 5.2
Xuelei Chen,Liming Zhang,Qiufen Liu,Bin Li,Senwei Wu,Shouqin Tian
Cr (VI) is a heavy metal ion that cannot be ignored in industrial wastewater and is highly toxic, posing a serious threat to the health and safety of natural organisms. In order to remove Cr (VI) ions in the wastewater, photocatalysis is currently employed and becomes a promising and effective way but the photocatalytic rate still needs further improvement. In this work, multi-walled carbon nanotubes (MWCNTs) modified SrTiO 3 –SrCO 3 microspheres with a three-dimensional porous structure were prepared by a facile solvothermal method. When the dosage of MWCNTs was 0.55 wt%, the obtained sample exhibited the highest photocatalytic efficiency, with approximately 100 % removal of Cr (VI) within 6 min and the photocatalytic rate constant (k) can reach 0.52 min −1 under full-spectrum light irradiation. The enhancement in the photocatalytic performance is probably attributed to the large surface area for more adsorption of Cr (VI) ions on the sample and effectively transfer of photo-generated carriers via the hetero-structures for the reaction of Cr (VI) ions with more carriers. Therefore, this work can provide a facile method for the preparation of photocatalysts with good performance for the removal of Cr (VI) in the wastewater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Shuwen Han,Xinwei Li,Yan Tan,Yu Huang,Zhongbiao Wu,Meng Wang,Wingkei Ho,Shun-cheng Lee
In this work, novel heterostructured SrTiO 3 /SrCO 3 (STO/SCO) interface was constructed via the one-pot g-C 3 N 4 (CN) self-sacrificing hydrothermal strategy. The as-developed STO/SCO photocatalyst shows the air cleaning potential in continuous-flow reactors with degradation rates of NO and HCHO at 44 % and 40 %, respectively. From XRD, FTIR, and XPS analysis, CN participates in the crystallise process as the source of CO 3 2− to form the STO/SCO interface viewed by TEM and HRTEM. Subsequent temperature-programmed desorption (TPD) analysis and density functional theory (DFT) calculation results revealed the enhanced chemisorption effects of O 2 on the catalyst surface. The existence of oxygen vacancies combined with the formation of heterojunction surface induces intermediate levels, which leads to the photocatalytic oxidation under simulated solar light. Charge difference distribution simulation coupled with electrochemistry and photoluminescence tests confirmed the internal-built electron fields at the heterojunction interface which would be beneficial for photocarriers separation. Based on the above-mentioned effects, enhanced reactive oxygen species (ROS) OH and O 2 − were detected under light irradiation by electron spin resonance (ESR). This work demonstrates the effectiveness of in-situ self-sacrificed strategy for construction of heterojunction interfaces and provides opportunities by utilising insulator-based materials for photocatalytic degradation of air pollutants.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF THERMAL SPRAY TECHNOLOGY
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2020
·Vol. 29
·期 5
·1172-1182
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IF 2.522
Zhai Mengjiao,Liu Yi,Huang Jing,Hou Wenjia,Wu Songze,Zhang Botao,Li Hua
Abstract A novel TiO 2 -SrCO 3 co-catalyst with a porous structure was fabricated by suspension plasma spraying. SrTiO 3 as revealed by high-resolution TEM was formed by the chemical reaction of TiO 2 with SrCO 3 during the high-temperature plasma spraying. A narrow band gap (2.58 eV) and reduction in the recombination speed of photoinduced carriers of the coatings were detected by UV–visible diffuse reflectance spectrometry and fluorescence spectrometry, respectively. The enhanced visible light-driven photodegradation properties of the coatings resulted in promoted degradation of methylene blue. The composite coatings also demonstrated significantly pronounced bactericidal activities against the Gram-negative bacterium Escherichia coli than the pure TiO 2 coatings, achieving a killing rate of over 99.7%. The results give insights on the potential to fabricate large-scale nano-TiO 2 -based porous photocatalytic coatings by suspension plasma spraying for versatile environmental applications. Graphic Abstract
研究领域:
材料科学
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化学工程
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环境科学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Shan-Lu Chen,Wei-Ming Guo,Shi-Kuan Sun,Yuji Masubuchi,Ming Lv,Hua-Tay Lin,Cheng-Yong Wang
In this work, nearly single phase SrTaO 2 N powder was directly prepared from strontium carbonate (SrCO 3 ) and tantalum mononitride (TaN), instead of the nitridation of the oxide precursors using NH 3 . The phase evolution and reaction mechanism together with the chemical composition, crystal structure and particle size of SrTaO 2 N product were investigated. Similar to the reactions between SrCO 3 and Ta 3 N 5 , the evolution of CO 2 , CO and N 2 was detected during the reactions. The results revealed that this novel reaction was able to successfully synthesize orange-coloured SrTaO 2 N powder with nearly pure phase at 1200 °C and the powder possessed the uniform size distribution with the mean diameter of 6.63 µm.
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yuanyuan Wang,Shenghao Wang,Xueqing Yu,Lei Cao,Minmin Mao,Hadi Barzegar Bafrooei,Zhilun Lu,Kaixin Song,Dawei Wang
The dielectric loss (tan δ) value of stoichiometric SrTiO 3 (ST), prepared using the solid-state reaction method, exhibits a random variation between 0.0006 and 0.01968 at room temperature and a frequency of 1 kHz in the literature. This variability makes it challenging to obtain reliable and reproducible performance for ST-based devices, especially when the underlying reasons are not yet completely understood. This work reports the significant effects of different raw materials, with various forms of TiO 2 , on the dielectric and electrical properties of ST ceramics. The results show that the purity of SrCO 3 and TiO 2 ultimately leads to distinct differences in dielectric properties, impedance properties, activation energy across the ST ceramics. Crystal comparison demonstrates that anatase TiO 2 is more suitable for dielectric applications. These results provide a reasonable explanation for the large variations in reported ST properties in the literature, which emphasizes the critical importance of selecting suitable reagents in ST-based ceramics. This insight opens up a new avenue for design optimization and highlights the promising potential of ST-based ceramics.
研究领域:
材料科学
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陶瓷
·
电气工程
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
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IF 5.5
Qianqian Li,Shuguo Yu,Peng Li,Wenjie Wang,Xingang Li
With the growing demand for detecting minute human signals in patients with tactile dysfunction driven by the Internet of Things (IoT) development, triboelectric nanogenerator (TENG) offers a solution for high-precision human signal monitoring. This study proposes an improved flexible TENG featuring a nanopapillary structure composed of barium zirconate titanate/strontium carbonate/polydimethylsiloxane (Sr-BZT/PDMS) for wireless monitoring of human finger bending signals. Inspired by the natural micronano architecture of lotus leaves, a biomimetic papillary structure was constructed on the surface of the negative triboelectric layer film, significantly increasing its contact area and surface roughness. Further incorporation of piezoelectric barium zirconate titanate nanoparticles and strontium carbonate enhanced the electrical output performance of the TENG through synergistic effects with a triboelectric effect. Consequently, when the Sr-BZT nanoparticle content in the biomimetic Sr-BZT/PDMS composite film reached 15 wt %, the composite film exhibited superhydrophobicity and high surface roughness (Rq = 200 nm). The corresponding TENG achieved electrical output performance of 52 V, 246 μA, and 1.7 W/m2. Compared with PDMS-based TENGs, the optimized device exhibited a 49-fold increase in short-circuit current. Furthermore, the TENG maintained stable output performance after continuous operation for one month. The TENG based on this design can collect minute mechanical signals generated when a human finger bends.
研究领域:
纳米技术
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能量收集
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可穿戴电子设备
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生物医学工程
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智能传感器
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
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IF 6.7
Siyuan Li,Yang Yu,Haojie Duan,Dong Yue,Yu Feng
Bi-free ZnO-SrCO 3 -Cr 2 O 3 -Co 3 O 4 based varistor ceramics with the composition (97.4- x ) mol% ZnO-2 mol% SrCO 3 -0.1 mol% Cr 2 O 3 -0.5 mol% Co 3 O 4 - x mol% MnO 2 ( x = 0–0.7) were prepared by a conventional solid-state reaction method. The effects of MnO 2 on the microstructure, grain-boundary barriers and nonlinear electrical properties were systematically investigated. MnO 2 addition induced a non-monotonic change in ZnO grain size, altered the morphology and distribution of the Sr rich intergranular phases, and promoted the formation of crystalline Sr 2 Mn 2 O 5 at x ≥ 0.5 mol%. The sample with x = 0.5 mol% exhibited the best initial nonlinear electrical characteristics among the compositions investigated, with E 1 mA = 614 ± 18 V/mm, α = 33.2 ± 1.7, J L = 3.66 ± 0.37 μA/cm 2 , and ϕ b = 0.866 ± 0.022 eV. Further increasing the MnO 2 content increased the Sr 2 Mn 2 O 5 phase fraction and refined the ZnO grains but reduced the nonlinear coefficient, indicating that the electrical response depended on the combined effects of phase composition, Sr-rich intergranular morphology, grain size, and grain-boundary-related electrical characteristics rather than on the amount of Sr 2 Mn 2 O 5 alone. These results demonstrate that appropriate MnO 2 addition can effectively regulate the microstructure and grain boundary related electrical response of Sr-Cr-based varistor ceramics.
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高影响因子
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