CERAMICS INTERNATIONAL
·
2017
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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
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 8
·3160
·
IF 3.4
Siyu Liu,Yaodong Yang,Yongming Hu,Wei-Feng Rao
This study investigates the impact of Sr doping on the tribocatalytic performance of BaTiO3in degrading organic pollutants. Ba1-xSrxTiO3(x = 0–0.3) nanopowders are synthesized and their tribocatalytic performance evaluated. By doping Sr into BaTiO3, the tribocatalytic performance was enhanced, resulting in an approximately 35% improvement in the degradation efficiency of Rhodamine B using Ba0.8Sr0.2TiO3. Factors such as the friction contact area, stirring speed, and materials of the friction pairs also influenced the dye degradation. Electrochemical impedance spectroscopy revealed that Sr doping improved BaTiO3’s charge transfer efficiency, thereby boosting its tribocatalytic performance. These findings indicate potential applications for Ba1-xSrxTiO3in dye degradation processes.Keywords:tribocatalysis;barium strontium titanate;substitution;friction;dye degradation
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2018
·Vol. 78
·期 8
·1733-1740
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IF 1.247
Chen Lifang,Bian Xiaokai,Lu Xiaofeng
The performance of different nanofiltration (NF) membranes for the treatment of strontium-containing radioactive wastewater was investigated. The effects of the initial strontium concentration, solution pH and complexation phenomena on strontium removal were described. For all the three membranes, the strontium rejection increased with decreasing initial strontium concentration. Meanwhile, the strontium rejection was minimum at the membrane isoelectric point (pH 5) primarily due to decreased co-ion electrostatic repulsion. In the presence of a complexing agent (polyacrylic acid or ethylenediamine tetraacetic acid disodium salt), the strontium rejection was generally higher than those obtained without a complexing agent for NF 270 and XN 45. Membrane cleaning experiments were also conducted to recover the performance of the membranes, which exhibited degradation during long-time filtration. The performance of the membranes after cleaning was close to that of the virgin membranes, especially for XN 45, whose recovery percentage was nearly 100%.
研究领域:
核化学与放射化学
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环境工程
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膜分离技术
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Wenze Zhang,Yukun Duan,Xiaopeng Chi,Wen Tan,Wei Weng,Shuiping Zhong
In the zinc production industry using Mn-rich zinc ore, substantial quantities of anodic slime are generated during electrolytic zinc production, containing ∼ 40 % Mn and ∼ 3 % Pb. While a valuable secondary resource, this material poses environmental risks as solid waste. Conventional reductive leaching methods rely on costly reductants and generate high carbon emissions. This study introduces a process utilizing flue gas from zinc plants as a reductant, achieving 92 % Mn leaching efficiency while simultaneously extracting 25 % Sr and fixing 92 % SO 2 as sulfate in solution. Kinetic analysis shows a mixed control model with an activation energy of 13.83 kJ/mol, with reaction rates further enhanced by optimizing gas inlet design. The MnSO 4 -rich leachate is processed into battery-grade MnSO 4 powder, and Sr is recovered as SrCO 3 , suitable for use as an additive in electrolytic zinc processes. Additionally, NaOH consumption for flue gas desulfurization decreases significantly from 2.14 kg to 0.17 kg per Nm 3 . Economic evaluation indicates reagent costs represent only 2 % of the total value of MnSO 4 and SrCO 3 products, offering a sustainable pathway for anodic slime utilization and SO 2 mitigation in zinc smelting.
研究领域:
冶金工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2022
·
IF 3.662
Yaoyao Yang,Xin Huang,Qianqian Zhang,Dehua Zheng,Wen Gong,Shuqiang Niu,Yanling Yu,Yu Song
Osteoporosis patients are prone to surgical failure after oral implantation due to the low bone density and poor bone healing ability. Improving the osseointegration effect by processing the surface topography of the implant is a promising method. Using the TiO 2 nanotubes as a new type of carrier to load metal elements is a good strategy for preparing multifunctional implant coatings that have both the required osteogenic and angiogenic activities. The present study aimed to investigate the effect of new-type implants on osseointegration by constructing strontium and cobalt codoped nanotubes in osteoporotic rats. Our results demonstrated that it induced more new bone formation and tighter osseointegration which may provide a new strategy for osteoporosis patients who need implant surgery.
研究领域:
生物医学工程
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口腔医学
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材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Chi Ma,Chenyu Qi,Dingbo Wei,Zhenzhen Jiang,Yafei Guo,Nelson Belzile,Tianlong Deng
The efficient and renewable recovery of cesium and strontium by absorption from a new type of geothermal water liquid mineral resource is highly desirable but still challenging. In this work, a new Zr-doped layered potassium thiostannate adsorbent (KZrTS) was first synthesized and used for Cs+ and Sr2+ green and efficient adsorption. It was found that KZrTS had very fast adsorption kinetics toward both Cs+ and Sr2+ with an equilibrium reached within 1 min, and the theoretical maximum adsorption capacities for Cs+ and Sr2+ were 402.84 and 84.88 mg/g, respectively. Moreover, to solve the loss problem of the engineering application of the powdered adsorbent KZrTS, KZrTS was uniformly coated with polysulfone by wet spinning technology to form micrometer-level filament-like absorbents (Fiber-KZrTS), whose adsorption equilibrium rates and capacities toward Cs+ and Sr2+ are almost the same as that of powder. Furthermore, Fiber-KZrTS showed excellent reusability, and the adsorption performance remained virtually unchanged after 20 cycles. Therefore, Fiber-KZrTS has potential application for green and efficient cesium and strontium recovery from geothermal water.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
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
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE CHEMICAL LETTERS
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2013
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IF 1.21
Shu-Chao Wu,Chao-Yang Sun,Wen-Ni Wang,Ying-Ting He,Sheng-Hong Hu,Cun-Jiang Zheng
In this paper, separation of Sr from associated elements (Na, K, Ca, Mg, and Ba) was carried out using an extraction chromatographic column packed with Sr selective specific resin consisting of an octanol solution of 4,4′(5′)-bis( t -butylcyclohexo)-18-crown-6 sorbed on an inert polymeric support. Using 8.0 mol/L HNO 3 as the eluent, Ba and associated elements were eluted immediately from the column, whereas Sr was strongly retained. The adsorbed Sr could then be stripped from the column as the eluent was changed to 0.05 mol/L HNO 3 . Complete Sr/Ba separation was demonstrated to be feasible in that Ba could be washed from the column leaving pure Sr by adequate rinsing with 8.0 mol/L HNO 3 . Furthermore, matrix effect could be effectively eliminated and the selectivity of the method was improved. The method was applied for the determination of Sr in the high purity barium carbonate (BaCO 3 ) product and seawater. The recoveries of Sr in 2 samples were determined to be 93.2% and 109%, respectively.
研究领域:
化学
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分析化学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2024
·
IF 5.4
Dongdong Zhang,Han Liu,Xiaodong Xue,Feihong Liu,Jun Wu,Feng Peng,Donghui Wang,Haobo Pan,Mei Li
Bone implantation inevitably causes damage to surrounding vasculature, resulting in a hypoxic microenvironment that hinders bone regeneration. Although titanium (Ti)-based devices are widely used as bone implants, their inherent bioinert surface leads to poor osteointegration. Herein, a strontium peroxide (SrO 2 )-decorated Ti implant, Ti_P@SrO 2 , was constructed through coating with poly-L-lactic acid (PLLA) to alleviate the hypoxic microenvironment and transform the bioinert surface of the implant into a bioactive surface. PLLA degradation resulted in an acidic microenvironment and the release of SrO 2 nanoparticles. The acidic microenvironment then accelerated the decomposition of SrO 2 , resulting in the release of O 2 and Sr ions. O 2 released from Ti_P@SrO 2 can alleviate the hypoxic microenvironment, thus enhancing cell proliferation in an O 2 -insufficient microenvironment. Furthermore, under hypoxic and normal microenvironments, Ti_P@SrO 2 enhanced alkaline phosphatase activity and bone-related gene expression in C3H10T1/2 cells with the continuous release of Sr ions. Meanwhile, Ti_P@SrO 2 suppressed M1 polarization and promoted M2 polarization of bone marrow-derived monocytes under hypoxic and normal conditions. Furthermore, in a rat implantation model, the implant enhanced new bone formation and improved osteointegration after modification with SrO 2 . In summary, the newly designed O 2 - and Sr ion-releasing Ti implants are promising for applications in bone defects.
研究领域:
生物医学工程
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材料科学
·
骨科
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Superconductivity and Novel Magnetism
·
2024
·
IF 1.6
Pi Siwen,Li Jie,Zhang Yingde,Zhou Weina,Shan Shuo,Zhao Xuan
Ce-substituted M-type Sr 1– x Ce x Fe 12 O 19 ( x = 0.00–0.08) ferrites were successfully synthesized via the ball milling method, and the sintering temperature at 1200 °C for 2 h. The synthesized materials were characterized by X-ray powder diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), and vibrating sample magnetometry (VSM). The elemental makeup of the samples was characterized by energy-dispersive spectrometry (EDS). The XRD results showed the crystal structure and purity of the samples. The FTIR spectroscopy indicated tetrahedral and octahedral tensile vibrations of M-type strontium ferrite at two characteristic peak bands of 554 and 454 cm −1 . The FESEM showed that Ce doping resulted in fine grains. The EDS indicated that Ce content increased with decreasing Sr concentration but that the concentrations of other elements remained basically unchanged. The mass ratio of Sr:Fe is calculated from EDS results and the measured Sr:Fe mass ratio is quite close to the mass ratio calculated from the reactants used to synthesize each sample. The VSM showed that at a Ce doping of x = 0.02, the coercivity of the samples reached the maximum, and the coercivity values and the saturation magnetization were 3878.25 Oe and 73.625 emu/g, respectively. And such high thermal stability further determines that Ce-substituted strontium ferrites have infinite potential in application fields (T = 450.2 °C).
研究领域:
材料科学
·
磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Xiao-Chen Liu,Ruixia Chen,Weizheng Sun,Leif H. Skibsted
Strontium as a bone health promoter was found to increase the bioaccessibility of essential calcium from solid calcium citrate tetrahydrate in aqueous suspensions. This is unexpected since calcium citrate binds calcium stronger than strontium with Δ H 0 ass, c = 5.07 kJ⋅mol −1 , Δ S 0 ass, c = 78.0 J⋅mol −1 ⋅K −1 for 1:1 Ca-Citrate complex formation and Δ H 0 ass, c = 1.67 kJ⋅mol −1 , Δ S 0 ass, c = 58.3 J⋅mol −1 ⋅K −1 for 1:1 Sr-Citrate complex formation as determined both electrochemically and by isothermal titration calorimetry. Calcium citrate tetrahydrate has reverse solubility around physiological temperature in contrast to strontium citrate pentahydrate. This difference results in opposite effect of strontium upon calcium ion liberation from calcium citrate suspensions at both low and high temperature compared to physiological temperature, for which strontium was found to stabilize solid calcium citrate tetrahydrate. This effect, confirmed by quantum mechanical calculation and by comparison of spontaneous aqueous supersaturation of calcium citrate and strontium citrate, is suggested to be involved in the positive effect of strontium on bone and teeth health. The conclusions provide a theoretical foundation for the research of molecular mechanisms among calcium, strontium, and citrate ions in relation to bone and teeth health.
研究领域:
营养学
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生物化学
·
医学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2021
·
IF 2.694
Yun-Yun Gao,Xiao-Feng Guo,Lan-Rong Zhao,Shi-Hua Sang
The stable phase equilibria of the ternary system MgBr2 + SrBr2 + H2O at 288 and 308 K were studied with the isothermal dissolution equilibrium method. The compositions of solutions and solid phases have been determined and the equilibrium solid phases at the invariant points were identified with the aid of the X-ray diffraction method. The phase diagrams of this system at 288 and 308 K were both constructed in terms of experimental results. Two stable phase diagrams show that this system is hydrate type I at two temperatures without formation of a solid solution or complex salt. Both the phase diagrams are composed of one invariant point, two univariate curves, and two crystallization regions (SrBr2·6H2O and MgBr2·6H2O). The equilibrium solid phases of the invariant point at 288 and 308 K are both SrBr2·6H2O and MgBr2·6H2O, respectively. Combining the Pitzer single-salt parameters of MgBr2 and SrBr2 reported in the literatures, the unreported mixing ion-interaction parameters θMg,Sr and ΨMg,Sr,Br at 288 and 308 K were fitted with the measured values in this study using the Pitzer equations. The agreement between the experimental values and calculated results in the ternary system MgBr2 + SrBr2 + H2O at 288 and 308 K shows that the parameters fitted with solubilities are reliable.
研究领域:
化学
·
物理化学
✓ 已验证
DOI
高影响因子
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