INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Haiyan Zhou,Ying Dai,Di Zhang,Jesse Daniel,Xing Zhong,Zhuyao Li,Qinqin Tao,Lei Xu
A novel chitosan (CTS) - based composite material, CTS/B18C6/B21C7, has been developed through the Schiff base reaction, incorporating two distinct crown ether ligands - aldehyde-benzo-18-crown-6 (B18C6) and aldehyde-benzo-21-crown-7 (B21C7). This design enables efficient and selective adsorption of cesium and strontium. The material features two recognition sites of exclusive affinity, enhancing selective adsorption through the matching cavity sizes of the crown ethers with Sr 2+ and Cs + . The structure and surface properties were characterized using SEM, TG, FT-IR and XPS confirming the successful Schiff base reaction and effective material synthesis. Adsorption experiments revealed that CTS/B18C6/B21C7 exhibited strong affinity and high adsorption capacity for Sr 2+ and Cs + . Under strong acid conditions (pH < 1), the adsorption strength increased, and higher acidity further enhanced adsorption capacity, indicating that electrostatic and other interactions play significant roles in the adsorption process. The Sips isothermal model was more suitable for describing this adsorption process, with maximum adsorption capacities of 172.11 mg/g for Cs + and 132.23 mg/g for Sr 2+ determined. These findings highlight the potential application of CTS/B18C6/B21C7 in treating radioactive nuclides.
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
Heliyon
·
2024
·
IF 3.4
Yige Guo,Xiaoxue Niu,Huaiyu Yang,Liwen Chen,Yizhen Ren,Huining Guo,Bo Wu
The oxidation rate of NO to NO 2 is a critical parameter in the removal of NO x within selective catalytic reduction (SCR) systems. LaCoO 3-δ is a kind of potential catalyst to enhance the oxidation of NO to NO 2 , it may offers an economic and stable alternative to noble metal catalysts, particularly at elevated temperatures. This study aimed to enhance the catalytic efficiency of LaCoO 3-δ through strontium (Sr) doping. La 1-x Sr x CoO 3-δ (with varying x values of 0.1, 0.2, 0.3, 0.4) was synthesized using a sol-gel method. La 1-x Sr x CoO 3-δ exhibited superior NO oxidation catalytic activity compared to LaCoO 3-δ , with the most notable enhancement observed at x = 0.3 (84 % conversion). This improvement can be attributed to the substitution of La 3+ with Sr 2+ , which induces lattice distortion and charge imbalance, thereby creating more oxygen vacancies that enhance the catalytic oxidation capability of La 1-x Sr x CoO 3-δ . However, it's important to note that an excessive amount of Sr can result in the formation of SrCO 3 deposits on the surface of La 1-x Sr x CoO 3-δ , thereby diminishing its catalytic oxidation performance. The catalytic oxidation reaction behavior adhered most closely to the O 2 -adsorbed E-R model, the surface defects in La 1-x Sr x CoO 3-δ playing a pivotal role in the catalytic reaction.
研究领域:
化学
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环境科学
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材料科学
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2025
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IF 8.2
Jiawei Nie,Xiaoqian Wu,Jingjiang Wei,Yidi Li,Hao Xie,Weimin Wang,Hao Wang,Hang Ping,Bin Li,Zhengyi Fu
The exoskeleton of arthropods exhibits a Bouligand structure, composed of a chitin matrix and calcium carbonate crystals, which confer exceptional mechanical properties. While many studies focus on the relationship between structure and performance, few investigate the mineral growth process within the Bouligand matrix. Here, chiral chitin films are prepared through evaporation-induced self-assembly of chitin nanowhiskers, and subsequently incubated in SrCO3 mineralizing solution. Initially, precursors deposit on the film surface and transform into mineralized points, which then radially expand outward along the surface and propagate inward until coalescing into a continuous mineral layer. The growth rate of these mineralized points is significantly enhanced by increasing the reaction temperature; at 60 °C, the growth rate is 13 times faster (650.4 μm2/min) compared to that at 25 °C (49.7 μm2/min). Finally, SrCO3/chitin composite bulks are fabricated by stacking and hot-pressing multiple mineralized chitin films, adhered using sodium alginate (SA) solution through spin coating. The resulting SrCO3/chitin@SA composites exhibit a bending strength of 64.2 MPa, representing a 27% increase over pure chitin bulk and a 105% increase over pure SrCO3 bulk. Our work provides a strategy for low-temperature fabrication of high-performance artificial composites.
研究领域:
材料科学
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生物学
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DOI
PubMed
高影响因子
Metals
·
2023
·Vol. 13
·期 4
·677
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IF 2.9
Yuliang Chen,Xiangbiao Yin,Hao Fu,Zheyang Lin,Guangcan Ma,Xinpeng Wang,Qingsong Wang,Fangqiang Chen
Strontium, the main component of radioactive nuclear wastewater, is characterized by a high fission yield and an extended half-life. It is easily absorbed by the human body, thus greatly threatening the environment and the human body. In this study, a mesoporous composite phase sodium superionic conductor (NVP@NMP) was synthesized by the droplet template method, and the rapid capture of Sr2+from wastewater was achieved by constructing a nano-heterogeneous interface to increase the ion diffusion rate. NVP@NMP showed efficient and rapid removal of strontium ions in adsorption kinetics, isothermal adsorption, solution pH, and interfering ions concentration tests, especially using the equilibrium time of 2 min for strontium absorption by NVP@NMP and a maximum theoretical adsorption capacity of 361.36 mg/g. The adsorption process was spontaneous, endothermic, and feasible. At higher concentrations of other competing ions (Na, K, Ca, Mg, and Cs), the adsorbent exhibited higher selectivity towards Sr2+.TEM, XPS, and XRD analyses revealed that ion exchange was the main mechanism for the NVP@NMP ultrafast adsorption of Sr2+. In this research, we investigated the feasibility of ultrafast strontium capture by sodium superionic conductor structured phosphates and explained the ultrafast strontium adsorption mechanism of NASICON materials through XPS.Keywords:NASICON;ultrafast adsorption;strontium;ion exchange;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
JOURNAL OF PHYSICS-CONDENSED MATTER
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2016
·Vol. 28
·期 47
·475501
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IF 2.209
LiDong Dai,Lei Wu,HePing Li,HaiYing Hu,YuKai Zhuang,KaiXiang Liu
The electrical transport properties of undoped and yttrium-doped strontium titanate (Sr(Ti1 – xYx)O3 – δ, x = 0, 0.02) under high pressure were investigated with in situ impedance spectroscopy measurements. A pressure-induced conductivity switching for undoped and 2 mole% Y-doped strontium titanate is observed at around ~10.0 and 7.0 GPa respectively, which are caused by a cubic to tetragonal I4/mcm phase transition. The decrease of the phase transition point of 2 mole% Y-doped strontium titanate can be attributed to larger Y3+ atoms occupying the B-site and the creation of more oxygen vacancies, which lead to octahedra tilting and symmetry breaking. The results of the voltage-bias dependence of grain-boundary impedance of undoped and 2 mole% Y-doped strontium titanate at different pressures revealed that Schottky-type potential barriers formed at grain boundaries are the key factor for the accumulation of oxygen vacancy at the interface under pressure.
研究领域:
材料科学
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凝聚态物理
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Tao Huang,Dongping Song,Lulu Zhou,Hui Tao,Aiyin Li,Shu-wen Zhang,Long-fei Liu
The natural ecosystem will continually deteriorate for decades by the leakage of Cs and Sr isotopes. The exploration of the new materials or techniques for the efficient treatment of radioactive wastewater is critically important. In this study, a dielectric barrier discharge (DBD) configuration was constructed to operate the non-thermal plasma (NTP). The NTP was incorporated into the synthesis of polyaluminum chloride (PAC) in two different procedures to intensify the synthesis of PAC (NTP-PAC) and enhance the further removal of Cs and Sr from wastewater. The employment of NTP in two procedures both had significantly changed the physicochemical characteristics of PAC materials, which facilitated the further adsorption application of NTP-PAC on the treatment of Cs + and Sr 2+ . Different molecular, morphological, and adsorption characteristics were confirmed to the NTP-PAC materials. The heterogeneous adsorption of the NTP-PAC can be appropriately fitted by both the pseudo-first-order kinetic model and the Elovich model. Both physisorption and chemisorption reaction mechanisms were ensured for the heterogeneous adsorption of the NTP-PAC material towards Cs + and Sr 2+ , which guaranteed the excellent adsorption performance of NTP-PAC materials compared to PAC. The electron collisions caused by NTP with alum pulp created highly reactive growth precursors and intensified the nucleation and hydrolysis polymerization of PAC. The employment of NTP explicitly broadens the reaction pathways between PAC and cationic contaminants in the aqueous environment, which expands the application area of PAC materials in environmental sustainability.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2020
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IF 2.888
Xia Wang,Kaiyu Zhao,Yafei Guo,Lingzong Meng,Tianlong Deng,Dan Li
The solid–liquid phase equilibria of systems LiCl–NaCl–CaCl 2 –SrCl 2 –H 2 O and CaCl 2 –SrCl 2 –H 2 O at 273.15 K and 0.1 MPa were investigated with the isothermal equilibrium method. The solid–liquid equilibrium phase diagrams were constructed with the experimental solubilities. The phase diagram in the ternary system consists of one univariant solubility curve saturated with solid solution (Ca,Sr)Cl 2 ·6H 2 O, and one crystallization field of the solid solution. There are three invariant points, seven isothermal univariant curves, and five crystallization regions saturated with NaCl corresponding to (Ca,Sr)Cl 2 ·6H 2 O, SrCl 2 ·2H 2 O, LiCl·2H 2 O, CaCl 2 ·4H 2 O and LiCl·CaCl 2 ·5H 2 O in the dry-salt diagram of the quinary system. The areas of crystallization zones decrease according to the above order. The J (NaCl), J (H 2 O), refractive index and density of the solution gradually change regularly with the increasing of J (CaCl 2 ) in the solution. These results on phase diagrams of the quinary system can supply theoretical reference for lithium salts and strontium salts separation from calcium chloride type brine.
研究领域:
化学
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材料科学
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DOI
高影响因子
Biomedicines
·
2021
·Vol. 9
·期 9
·1138
·
IF 6.081
Xiaofeng Cao,Wufei Ge,Yihu Wang,Ming Ma,Ying Wang,Bing Zhang,Jianing Wang,Yanchuan Guo
Although bone repair scaffolds are required to possess high radiopacity to be distinguished from natural bone tissues in clinical applications, the intrinsic radiopacity of them is usually insufficient. For improving the radiopacity, combining X-ray contrast agents with bone repair scaffolds is an effective method. In the present research, MgNH4PO4·H2O/SrHPO43D porous composite scaffolds with improved radiopacity were fabricated via the 3D printing technique. Here, SrHPO4was firstly used as a radiopaque agent to improve the radiopacity of magnesium phosphate scaffolds. X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS) were used to characterize the phases, morphologies, and element compositions of the 3D porous composite scaffolds. The radiography image showed that greater SrHPO4contents corresponded to higher radiopacity. When the SrHPO4content reached 9.34%, the radiopacity of the composite scaffolds was equal to that of a 6.8 mm Al ladder. The porosity and in vitro degradation of the porous composite scaffolds were studied in detail. The results show that magnesium phosphate scaffolds with various Sr contents could sustainably degrade and release the Mg, Sr, and P elements during the experiment period of 28 days. In addition, the cytotoxicity on MC3T3-E1 osteoblast precursor cells was evaluated, and the results show that the porous composite scaffolds with a SrHPO4content of 9.34% possessed superior cytocompatibility compared to that of the pure MgNH4PO4·H2O scaffolds when the extract concentration was 0.1 g/mL. Cell adhesion experiments showed that all of the scaffolds could support MC3T3-E1 cellular attachment well. This research indicates that MgNH4PO4·H2O/SrHPO4porous composite scaffolds have potential applications in the bone repair fields.Keywords:magnesium phosphate;strontium hydrogen phosphate;3D printing;scaffolds;radiopacity
研究领域:
生物医学工程
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材料科学
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组织工程
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DOI
PubMed
高影响因子
Advanced Science
·
2024
·
IF 14.3
Zhengwei Liu,Hui Zhang,Jingjing Gan,Yuanjin Zhao,Yongxiang Wang
Hydrogel-derived implants have proven value in bone tissue regeneration, and current efforts have concentrated on devising strategies for producing functional implants with desired structures and functions to improve therapeutic outcomes. Herein, a novel black phosphorus (BP) tagged responsive strontium (Sr) hydrogel particles are presented for bone defect repair. By applying microfluidic technology, Sr and carboxymethyl chitosan, and BP are integrated into poly(N-isopropyl acrylamide) (pNIPAM) hydrogel matrix to generate such microparticles called pNBCSMs. Upon exposure to near-infrared irradiation, the pNBCSMs experience volume shrinkage and provoke the extrusion of the incorporated Sr, ascribed to the photothermal conversion ability of BP and the thermosensitivity of pNIPAM. In vitro and in vivo experimental results reveal that pNBCSMs subjected to near-infrared light display superior anti-inflammatory, anti-apoptotic, bacterial inhibitory, as well as osteogenesis-promoting effects, thereby effectively improving defective cranial bone repair. These features suggest that the proposed pNBCSMs can be promising candidates for bone repair.
研究领域:
生物材料学
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组织工程学
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医学
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2024
·Vol. 35
·期 19
·1-8
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IF 2.8
Yan Shuai,Hu Wencai,Wang Sen,Liu Gaobin
In this paper, Sr-doped BaTiO 3 nanoparticles were synthesized via electrochemical method, leading to the successful preparation of Ba 0.67 Sr 0.33 TiO 3 (BST) powders. The phase composition and microstructure of the powders were characterized using X-ray diffraction small angle X-ray scattering, scanning electron microscopy (SEM), and transmission electron microscopy. The results show that the average grain size of the nanoparticles is in the range of 10–20 nm, and the particles with good crystallinity are obtained under the environment of 3 mol.L −1 NaOH concentration. Sintering at 1250 ℃ for 3 h yields nanoscale BST ceramics with a dense structure and an average grain size of about 300 nm. These fine-grained ceramic samples exhibit superior temperature stability compared to relatively coarser BST ceramics. Furthermore, due to their nanoscale grain size, extensive phase transitions result in a low dielectric constant as observed from the dielectric property data. This work presents a novel approach for preparing nanoscale powders and homogeneous ceramics applicable in various electronic applications.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Xiao-Dong Jian,Biao Lu,Dan-Dan Li,Ying-Bang Yao,Tao Tao,Bo Liang,Xiong-Wei Lin,Jin-Hong Guo,Yi-Jiang Zeng,Sheng-Guo Lu
Barium strontium zirconate titanate ceramics ((BaSr)(ZrTi)O3-BSZT) with Zr4+ ionic contents of 15 and 20 mol % and Sr2+ ionic contents of 15, 20, 25, and 30 mol % were prepared using a solid-state reaction approach. X-ray diffraction and scanning electron microscopy were used to characterize the lattice structure and morphologies of the ceramics. Permittivity and polarization as a function of temperature were characterized using an impedance analyzer and a Tower–Sawyer circuit. The electrocaloric effect was measured directly and calculated using the Maxwell relation (indirectly). The results indicated that the BSZT ceramics change from a normal ferroelectric to a relaxor ferroelectric with increasing Zr4+ ionic content, which can be further modified by the addition of Sr2+ ionic content. The optimized adiabatic temperature change ΔT obtained is 2.43 K in (Ba0.85Sr0.15)(Zr0.15Ti0.75)O3 ceramics, and ΔT >1.6 K over a wide temperature span of 120 °C was obtained.
研究领域:
材料科学
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物理学
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DOI
PubMed
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2025
·
IF 1.6
Tian Duan,Wang Zhe,Zhang Jiaqian,Luo Ying,Zhang Zhenlong,Li Chao,Ye Kai,Peng Chaoliang,Chen Yiming,Lin Wenxue,Zhang Jingyan
This study examines attapulgite-bentonite-pyrite (AB 7 Fe) and zeolite-bentonite-pyrite (ZB 7 Fe) mixtures as buffer and backfill materials for nuclide migration using soil column experiments and COMSOL modeling. The results indicated that ZB 7 Fe possessed higher adsorption capacities for cesium (Cs) and strontium (Sr) compared to AB 7 Fe. Conversely, AB 7 Fe demonstrated superior retardation performance, more effectively slowing nuclide migration. After 1000 years, Cs and Sr concentrations in AB 7 Fe surpassed those in ZB 7 Fe. Additionally, nuclide migration increased with higher initiation pressure, dispersion, and diffusion coefficients. This research is crucial for improving the long-term safety of nuclear waste repositories.
研究领域:
环境科学
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核废物管理
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DOI
高影响因子
危险品化学品经营许可证（带存储）