CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Can Liu,Xinru Li,Qiming Duan,Xiaoping Yu,Yafei Guo,Tianlong Deng
There are abundant strontium resources in oilfield water with vast economic potential, but they have not yet been explored due to the complex matrix composition and the lack of cost-effective extraction technologies. Herein, four kinds of α -type ammoniated phosphates (A-MPs, M(NH 4 PO 4 ) x (HPO 4 ) 2- x ; M = Zr, W, Mo, and Ti, 0 ≤ x ≤ 2) were designed and compared based on Density Functional Theory (DFT) calculations. It was inferred that ammoniated titanium phosphate (A-TiP) has both high structural stability and superior Sr 2+ adsorption performance due to its low formation energy and Sr 2+ adsorption energy. This conclusion was confirmed by the synthesis of A-TiP through a simple solid-state synthesis, and the maximum adsorption capacity of the optimized A-TiP was 320.9 mg·g −1 . To facilitate the industrial application of powdery A-TiP, it was further fabricated into fibers by wet spinning technology with low-cost PVC as the binder. Since the mesoporous structure and high stability of the obtained adsorbent (PVC-A-TiP), it still exhibited a high maximum adsorption capacity ( q max = 291.75 mg·g −1 ), strong adaptability (active pH = 4 ∼ 12), and a short adsorption equilibrium time ( t e = 60 min). When applied for Sr 2+ recovery from complex oilfield water, the distribution coefficient of Sr 2+ reached 11740.21 mL·g −1 , and the dynamic adsorption capacities ranged from 121.61 to 162.46 mg·g −1 . The material also showed excellent cycle stability, and the adsorption performance did not decrease even after 50 adsorption-desorption cycles. These excellent results demonstrate that the developed material can be employed as a potential adsorbent for selective extraction of Sr 2+ from oilfield water or other liquid Sr minerals.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 24
·22375-22384
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IF 2.22
Wang Li,He Lin,Li Ji,Yu Yongsheng,Li Haibo
M-type strontium ferrite is a kind of magnetic functional material with wide application prospect. In this work, SrFe 12− x Al x O 19 (0 ≤ x ≤ 1) and Sr 1− y Ca y Fe 8 Al 4 O 19 (0 ≤ y ≤ 0.4) have been prepared by a hydrothermal method, and the effects of Al 3+ doping and Al 3+ and Ca 2+ co-doping on the magnetic properties have been investigated. X-ray diffraction analysis indicates all the samples are a hexagonal structure, and the shift of the diffraction peaks suggests that Al 3+ and Ca 2+ are successfully doped in SrFe 12 O 19 . Field emission scanning electron microscope images show the particles have the hexagonal shape with the size of 1.1–2.9 µm. Vibrating sample magnetometer reveals that the doping of Al 3+ and the co-doping Al 3+ and Ca 2+ can enhance magnetic properties of strontium ferrite. For example, the values of coercivity and the saturation magnetization of SrFe 8 Al 4 O 19 are 914.1 Oe and 44.0 emu/g, which are 3% and 117% enhancement compared with SrFe 12 O 19 , respectively. For Sr 1− y Ca y Fe 8 Al 4 O 19 , coercivity and saturation magnetization increase from 914.1 Oe and 41.8 emu/g to 1047.2 Oe and 50.2 emu/g when the Ca 2+ doping concentration increases from 0 to 0.4. Moreover, the effects of acid washing also on phase composition, morphology and magnetism are researched. The as-synthesized doping strontium ferrite will be useful for the applications in security switching and recording media.
研究领域:
材料科学
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磁学
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DOI
高影响因子
BULLETIN OF MATERIALS SCIENCE
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2019
·Vol. 42
·期 1
·1-5
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IF 1.264
Zhou Wei,Xie Qian,Li Junjie,Zhengwei Cao,Peng Feng
A simple and economic \(\hbox {CO}_{{2}}\) bubbling crystallization reactor for preparation of strontium carbonate \((\hbox {SrCO}_{3})\) was designed. Through monitoring pH and conductivity, hollow \(\hbox {SrCO}_{{3}}\) fibres without any morphology control agents were successfully obtained. The effects of temperature and \(\hbox {CO}_{{2}}\) flow rate on the morphology of \(\hbox {SrCO}_{{3}}\) were analysed. This study presents a new method for carbonate crystal control and growth.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
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IF 5.155
Li Liu,Qiuyue Yang,Lei Huang,Xiangmei Liu,Yanqin Liang,Zhenduo Cui,Xianjin Yang,Shengli Zhu,Zhaoyang Li,Yufeng Zheng,Kelvin Wai Kwok Yeung,Shuilin Wu
In this work, a conversion coating of phytic acid (PA)/calcium ion (Ca 2+ ) was prepared on a magnesium-strontium (Mg-Sr) alloy surface through a layer-by-layer self-assembly method. The effect of the pH value on the corrosion resistance of coatings was studied systematically. The addition of a Ca 2+ could enhance the intermolecular chelation of PA and repair the defects of the coating itself. The results of electrochemical and immersion testing confirmed that a PA/Ca 2+ conversion coating could adjust the corrosion rate of Mg-Sr alloys. Compared to a bare Mg-Sr alloy, the corrosion current density of Mg&OH&PA(5.5)&Ca 2+ was decreased by about three orders (2.726 × 10 −4 A/cm 2 to 4.304 × 10 −7 A/cm 2 ). In vitro tests showed that a Ca 2+ in the coatings could not only promote the formation of apatite , but also favored osteoblast proliferation. In addition, this conversion coating could significantly enhance the expression of alkaline phosphatase activity by 50–60% compared to a bare Mg-Sr alloy.
研究领域:
材料科学
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生物医学工程
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腐蚀科学
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DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2016
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IF 3.902
Kena Ma,Dan Huang,Jing Cai,Xinjie Cai,Lingling Gong,Pin Huang,Yining Wang,Tao Jiang
Metal orthopedic implants still face challenges in some compromised conditions, partly due to bio-inertness. The present study aimed to functionalize metallic implants with organic-inorganic nanocomposite (strontium-containing chitosan/gelatin) coatings through a simple single-step electrophoretic deposition under mild conditions. The surface characterization and in vitro cellular response were studied and compared with chitosan/gelatin (CS/G) coatings. SEM images suggested the inorganic nanoparticles may be encapsulated within or mixed with organic polymers. The XRD patterns showed that strontium carbonate was generated in the coatings. The TEM images revealed strontium-containing nanoparticles were released from the coatings in PBS. The continuous release after the initial burst release ensured the enduring effects of the functionalized surface. The tensile bond strength of the coatings to the substrates increased after the addition of strontium. In vitro cellular study confirmed that strontium-containing coatings supported the proliferation of MC3T3-E1 cells and exhibited excellent ability to enhance the differentiation of such pre-osteoblasts. Therefore, such organic-inorganic nanocomposite coatings are a promising candidate to functionalize orthopedic implant surfaces.
研究领域:
生物材料学
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医学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2018
·Vol. 319
·期 1
·115-121
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IF 1.181
Chen Shunzhang,Shu Xiaoyan,Luo Fen,Dong Hao,Xu Chen,Li Bingsheng,Shao Dadong,Lu Xirui
To efficiently inhibit the diffusion of radioactive nuclides in soil that were left by nuclear emergency accidents, microwave sintering technology was used in this work to vitrify the simulated strontium contaminated soil. Four kinds of simulated strontium-contaminated soil could be successfully vitrified almost completely within 30 min without any additional components. Sr 2+ cations are immobilized into aluminosilicate glass network structure. In addition, the solubility of SrSO 4 in different soil is related to the element contents of aluminum and silicon. This work reveals a demonstration that beta-radioactive contaminated soil could be treated by microwave vitrifying.
研究领域:
环境科学
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核技术
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DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 10
·6346-6355
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IF 3.9
Lina Wu,Huiping Wang,Xiangqian Kong,Haibo Wei,Sheng Chen,Lisheng Chi
Effective removal of strontium isotopes in radioactive waste streams has important implications for the environment and the sustainable development of nuclear energy. In this work, a zirconium phosphate/18-crown-ether-6 (ZrP/18C6) composite was prepared using the intercalation method by loading crown ether into zirconium phosphate. The composite was structurally and morphologically characterized by XRD, FT-IR, XPS, and SEM. The adsorption experiments of Sr2+ onto the ZrP/18C6 composite were conducted as a function of temperature, pH, Sr2+ concentration and competing ions. The results indicate ZrP/18C6 can adsorb 98.6% of Sr2+ within 30 minutes at an Sr2+ concentration of 100 mg L−1 and maintain a high removal rate with a distribution coefficient of 7 × 105 mL g−1 when Sr2+ is at a low level of 4.28 mg L−1. The ZrP/18C6 composite reached a maximum adsorption capacity of 195.74 mg g−1 at an Sr2+ concentration of 380 mg L−1, which is significantly higher than the 43.03 mg g−1 of α-ZrP. The adsorption performance of Sr2+ onto ZrP/18C6 is not significantly affected by temperature, pH and competing ions. Furthermore, the adsorption kinetics and thermodynamics were analyzed based on the adsorption data obtained in the present work. It is shown that the adsorption of Sr2+ onto ZrP/18C6 follows the pseudo-second-order model and the Langmuir monolayer model, respectively. Additionally, the adsorption mechanism of Sr2+ by ZrP/18C6 is discussed.
研究领域:
环境科学
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核化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 14
·4398-4406
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IF 4
Hongyuan Song,Bin Liu,Jinhua Zeng,Guangpeng Huo,Liangwei Chen,Jianlu Wang,Lan Yu
The transition metal oxide (TMO) SrCoO3−δ family with rich structural diversity has been widely studied in the phase transition and energy application fields. We report the multiple-phase structure evolution, phase transitions during sintering, and electrical transport of A-site doped Sr4−xYxCo4O12−δ (x = 0–1.0) ceramics. Sr6Co5O15 (x = 0) adopts a hexagonal structure (H), Sr4−xYxCo4O12−δ (x = 0.2–0.4) ceramics adopts a cubic perovskite (CP) structure, and Sr4−xYxCo4O10.5+δ′ (x = 0.8–1.0) ceramics adopts an ordered-tetragonal (OT) structure; moreover, their phase transitions during the sintering processing of samples are systematically investigated. Combining the thermal analysis and X-ray diffraction results, the exothermic peak and weight gain of Sr3YCo4O10.5 (x = 1.0, T) at 1042 °C are considered to correspond to an ordered phase transition (T → OT) occurring. Finally, a systematic phase schema of the Sr4−xYxCo4O12−δ (x = 0–1.0) state dependence on the Y content and sintering temperature is obtained. The high-energy Y–O bond stabilizes the high-temperature CP structure (x = 0.2–0.4) and induces a structural evolution from the CP to OT structure (x = 0.8–1.0). In addition, all Sr4−xYxCo4O12−δ (x = 0–1.0) ceramics show semiconductive electrical transport behavior. Sr6Co5O15 (H) with a one-dimensional chain structure has the highest resistivity, while Sr3.8Y0.2Co4O12−δ (CP) with a three-dimensional corner-sharing structure exhibits the lowest resistivity, and Sr4−xYxCo4O12−δ (x = 0.2–1.0) ceramics show an increasing tendency in resistivity due to the hole carrier Co4+ converting to Co3+. We studied multiple-phase evolution and ordered phase transition in Sr4−xYxCo4O12−δ (x = 0–1.0) ceramics through Y–O bonding.
研究领域:
材料科学
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物理化学
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产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Yusheng Yang,Bai Sun,Guangdong Zhou,Chuan Ke,Jie Zhang,Yongzan Zhou,Shuangsuo Mao,Jiajia Qin,Yong Zhao
Since memristors have shown great application prospects in non-volatile memory, neural synapse, brain-like chips, artificial intelligence (AI) and quantum computers, the research of memristors has received extensive attention. In this work, the resistive switching (RS) device with Ag/SrTiO 3 (STO)/Ti structure was fabricated, and it can significantly improve the RS performance of device by doping Mn ions into STO to replace part of Ti ions . That is to say, the Ag/Mn-doped SrTiO 3 (SMTO)/Ti device exhibits larger resistance window and better retention at room temperature. Finally, through in-depth mechanistic analysis, a physical model of the conducting filament and Schottky emission was established to understand the charge transport mechanism and RS behavior of the device. In particular, it provides favorable factors for the migration of ions and electrons through the Mn doping because the substitution of Mn for Ti ions reduces the volume of the STO crystal while distorting its crystal shape since the ionic radius of Mn is smaller than that of Ti. This work provides an important way to improve the RS properties of ABO 3 -type perovskite-based resistive random access memory (RRAM), and helps to explore the cutting-edge applications of high-performance RS devices in information processing and AI.
研究领域:
材料科学
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电子工程
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人工智能
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Jingjie Diao,Jianhua Zu,Gang Han,Yi Xue,Xiaohan Pan,Mingjie Jin,Siyu Liu,Qing Tang
The preparation of cost-effective, environmentally friendly, and highly selective adsorbents is crucial for capturing 90 Sr from radionuclide-contaminated wastewater due to its long half-life and chemical toxicity. In this study, a novel IDA-type chelating resin (PS-IDA) was synthesized by chloroacetylating polystyrene (PS) and introducing iminodiacetic acid (IDA) onto it. Batch adsorption experiments were conducted to investigate the adsorption of Sr 2+ on PS-IDA, including pH, contact time, initial concentration of Sr 2+ , and competing ions. The results indicated that pH 10 was the optimal condition for maximum Sr 2+ ion adsorption. According to isotherm and kinetic data, the adsorption was well-fitted to the Freundlich model and pseudo-second-order kinetic model. Notably, PS-IDA exhibited a high removal rate at pH 10, removing 98.0% and 99.6% of non-radioactive Sr 2+ and 90 Sr, respectively. In simulative groundwater, PS-IDA demonstrated remarkable selectivity for trace levels of 90 Sr ( 90 Sr: Na + : K + : Cs + : Mg 2+ molar ratio = 1: 6.6 × 10 15 : 3.8 × 10 14 : 2.5 × 10 14 : 1.5 × 10 13 ), indicating its potential for selective capture of 90 Sr from contaminated groundwater. Furthermore, PS-IDA resin with a suitable diameter and improved mechanical strength can be used for large-scale remediation of 90 Sr-contaminated wastewater by column chromatography method. Finally, the adsorption mechanism was explained based on experimental data and characterizations which included ion exchange between Sr 2+ in the solution with H + on the resin and then the formation of chelates between adsorbed Sr 2+ and O, N atoms from IDA.
研究领域:
环境科学
·
放射化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 26
·9030-9036
·
IF 6.4
Jinyi Wang,Xudong Wang,Chenjie Zhang,Xinyu Zhang,Tianliang Zhou,Rong-Jun Xie
Near-infrared (NIR) phosphors play a key role in phosphor-converted NIR emitters, but to find broadband phosphors still remains a great challenge due to the lack of strategies for screening appropriate hosts. Herein, we report a broadband Sr6Sc2Al4O15:Cr3+ NIR phosphor by choosing a host that has crystallographic sites accommodated for both Ce3+ and Cr3+ simultaneously. The emission spectrum of Sr6Sc2Al4O15:Cr3+ covers the region of 600–1500 nm, having a maximum at 860 nm and a full width at half-maximum (FWHM) of 241 nm. A NIR pc-LED was fabricated by combining the Sr6Sc2Al4O15:Cr3+ phosphor with a blue LED, which can produce a NIR output power of 0.16 mW driven at 750 mA. The fabricated NIR emitter demonstrates a good suitability in night vision and non-destructive detection.
研究领域:
材料科学
·
光学工程
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产品关联
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2017
·
IF 2.659
Qing Hu,Weihui Jiang,Xiaofeng Chen,Yuli Li,Qiming Liang
We synthetized a series of strontium-substituted submicron bioactive glasses spheres (Sr-SBG, SiO 2 -P 2 O 5 -CaO-SrO) in which strontium was substituted for calcium on a mole percentage basis, then investigated the effect of strontium-substituted amount on morphologies, physicochemical properties, apatite-forming bioactivity of SBG and evaluated the proliferation, differentiation and mineralization of Sr-SBG with different strontium substitution amounts by co-cultured with human dental pulp cells (HDPCs). Results showed that Sr-SBG with different strontium substitution amounts were successfully fabricated and substituting different strontium amounts did not affect the morphology and particle size of SBG. All the Sr-SBG possessed good apatite-forming ability, but substituting a certain amount of strontium for calcium would weaken the apatite-forming ability of SBG. Additionally, all the Sr-SBG extractions promoted proliferation, early odontogenic differentiation and mineralization of HDPCs, however, the cell proliferation, differentiation and mineralization abilities would be reduced when the substituted amount of strontium was excess (15 mol%). This study suggests that Sr-SBG with moderate strontium substitution amounts can be used as a more promising biomaterial for dental repair.
研究领域:
材料科学
·
生物医学工程
·
口腔医学
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DOI
高影响因子
危险品化学品经营许可证（带存储）