SUPRAMOLECULAR CHEMISTRY
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2011
·
IF 1.94
Jing Cao,Jun Xiang Feng,Yong Xiang Wu,Xue Qun Pei,Jiao Jiao Yan,Yang Liu,Wen Jie Qin,Xiao Bin Zhang
A novel 15-aza-5-crown ether linked to styryl chemosensory 13-(4-((9H-fluoren-9-ylidene)methyl)-2-nitrophenyl)-1,4,7,10-tetraoxa-13-azacyclopentadecane was designed and synthesised, it would not occur during photoisomerisation under radiation of light but shows special capability of selectively recognising for Sr2+.
研究领域:
化学
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材料科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
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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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Sifan Li,Pengcheng Zhang,Yujuan Zhang,Kaikai Qiu,Lin Wang,Jianhui Lan,Yu Zhang,Xuwen Zhao,Chengzhen Miao,Weiqun Shi
In this work, we use a well-defined water-soluble macrocyclic molecule cucurbit[5]uril (CB5) to modify 2D Ti 3 C 2 T 2 MXene and assemble a novel high-performance adsorbent CB5-Ti 3 C 2 T 2 for Sr ion by density functional theory and experimental methods. The structural stabilities of two distinct types of CB5-Ti 3 C 2 T 2 (T = F, O and OH) complexes, i.e., CB5-Ti 3 C 2 T 2 (V) and CB5-Ti 3 C 2 T 2 (P) configurations are proved by binding energy and ab initio molecular dynamics (AIMD) simulations. Calculations of adsorption properties reveal that all the considered CB5-Ti 3 C 2 T 2 complexes can act as efficient adsorbents for Sr ion, among which CB5-Ti 3 C 2 O 2 complex possesses the best performance. The high affinity (the calculated adsorption energies < −7.6 eV) and selectivity of CB5-Ti 3 C 2 T 2 complex for Sr ion are attributed to the synergistic effect between CB5 molecule and Ti 3 C 2 T 2 MXene in the adsorption process, which arises from the multisite interactions of portal carbonyl groups of CB5 and surface functional groups of Ti 3 C 2 T 2 towards Sr. Finally, CB5-Ti 3 C 2 T 2 complex was successfully synthesized, and experimental results confirm its synergistic effect, good selectivity and high removal efficiency for Sr ions. In the treatment of strontium-containing wastewater with low concentrations, the distribution coefficient and decontamination factor of CB5-Ti 3 C 2 T 2 for Sr were determined to be as high as 2.88 × 10 5 mL/g and 144.9, respectively, and the separation factor ( SF Sr/Ca ) achieved a notable value of 67. 5. This work is expected to present a new strategy for the construction of high-performance MXene-based adsorbent for radionuclide elimination.
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Biomaterials Science
·
2020
·Vol. 9
·期 3
·960-972
·
IF 6.183
Hongjie Zhang,Qiuquan Cai,Yanhui Zhu,Weipu Zhu
Numerous efforts have been made to prepare hydrogels with injectability, adhesivity and osteogenic activity for bone regeneration. However, current hydrogels with these characteristics have limited application in clinical translation due to their complex chemical compositions, which causes difficulty in batch production. In this study, a multifunctional hydrogel with a binary component is prepared for bone regeneration. Dopamine (DA) is first grafted to alginate (Alg) by amidation reaction to give Alg-DA. Then an injectable hydrogel is facilely prepared by mixing strontium ions with the Alg-DA aqueous solution, utilizing the dynamic ionic bonds between the strontium ions and carboxyl groups of Alg-DA. Under the simulated oxidation conditions in vivo, the injectable hydrogel can form stable chemical crosslinkages owing to the presence of catechol groups on Alg-DA. In addition, the catechol groups endow the hydrogel with significant tissue adhesivity. More importantly, the strontium ions endow the hydrogel with osteogenic activity. As indicated by animal experiments, the strontium containing hydrogel scaffolds help to treat rat bone defects within 8 weeks compared to hydrogels without strontium and control groups. This simple hydrogel constructed by using a binary component has achieved several necessary functions, and is expected to be used as a scaffold for bone tissue engineering in clinical applications.
研究领域:
生物材料学
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组织工程学
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DOI
PubMed
高影响因子
Metals
·
2023
·Vol. 13
·期 4
·677
·
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
ACS Applied Materials & Interfaces
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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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2018
·Vol. 319
·期 1
·115-121
·
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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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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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
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放射化学
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产品关联
DOI
高影响因子
BIOMATERIALS
·
2018
·
IF 8.806
Xuzhu Wang,Jundong Shao,Mustafa Abd El Raouf,Hanhan Xie,Hao Huang,Huaiyu Wang,Paul K. Chu,Xue-Feng Yu,Yang Yang,AbdelBasit M. AbdEl-Aal,Nefissa H.M. Mekkawy,Richard J. Miron,Yufeng Zhang
A near-infrared (NIR) light-triggered drug delivery platform is produced by incorporating SrCl 2 and BP nanosheets (BPs) into poly(lactic- co -glycolic acid) (PLGA) for bone regeneration . The fabricated BP-SrCl 2 /PLGA microspheres show efficient NIR absorption and photothermal effects due to the BPs. The NIR-triggered release behavior of Sr 2+ by flawing the PLGA shells is investigated and the microspheres exhibit excellent cell viability and biodegradability . Implantation of the BP-SrCl 2 /PLGA microspheres into a rat femoral defect demonstrates good tissue compatibility and excellent bone regeneration capacity under NIR light irradiation. Our study indicates that local release of Sr 2+ at optimal time periods controlled by NIR irradiation improves bone regeneration significantly and this NIR-triggered drug delivery system composed of BPs is suitable for therapies requiring precise control at specific time.
研究领域:
生物医学工程
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材料科学
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骨科研究
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DOI
PubMed
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Jiang-bo Huo,Guoce Yu,Jianlong Wang
In this study, a new adsorbent, polyvinyl alcohol (PVA) and graphene oxide (GO), was prepared, characterized and used for the removal of Sr 2+ from aqueous solution. In PVA/GO composite, the inter-lamellar spacing of adjacent GO layers was dramatically enlarged due to the intercalation of PVA molecules, such a unique architecture significantly mitigated the aggregation of GO layers, which facilitated the accessible exposure of active sites and the mass transfer of strontium ions (Sr 2+ ), thus enhancing the adsorption capacity toward Sr 2+ . The adsorption of Sr 2+ by PVA/GO composite conformed to the pseudo second-order kinetic model ( R 2 = 0.9994), the Langmuir model ( R 2 = 0.9042), and the Freundlich model ( R 2 = 0.9598). The complexation interaction between Sr 2+ and oxygen atoms/π-electron domain of PVA/GO composite was primarily responsible for the adsorption mechanism, based on the characterization results of X-ray photoelectron spectroscopy (XPS), scanning electron microscope equipped with energy dispersion spectroscopy (SEM-EDS) and powder X-ray diffraction (PXRD).
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Peigang He,Jingyi Cui,Meiling Wang,Shuai Fu,Hualong Yang,Chengyue Sun,Xiaoming Duan,Zhihua Yang,Dechang Jia,Yu Zhou
Notwithstanding the success of carbon-free nuclear power in the new energy industry, an effective way to address nuclear contamination is still lacking. As a generally accepted method to date, immobilization of radioactive nuclear wastes with inexpensive and environment-friendly matrix such as geopolymer has attracted extensive attention. In this contribution, Na-based and K-based metakaolin geopolymer were prepared to encapsulate simulated radioactive Cs + and Sr 2+ under different temperatures and environments during long-term leaching tests. The temperature-dependent and environmental-dependent leaching kinetics as well as their dominant leaching mechanisms have been revealed. The results showed that Na-based and K-based geopolymer exhibited better immobilization performance than that of Portland cement, ceteris paribus. For the immobilization of Cs + , Na-based geopolymer showed lower leaching rate than K-based geopolymer under the same leaching conditions. Both higher temperature and salt solution accelerated the leaching behaviors of Sr + and Cs 2+ from the encapsulation matrix. This contribution sheds light on understanding the dominant leaching mechanisms of hazardous elements under different storage environments and highlights the significance of salt-tolerant matrix for the immobilization of nuclear wastes.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Frontiers in Bioengineering and Biotechnology
·
2022
·
IF 6.064
Guo Yixuan,Hong Nhung Nguyen Thi,Dai Xiang,He Chunlin,Wang Youbin,Wei Yuezhou,Fujita Toyohisa
While enjoying the convenience of nuclear energy development, the environmental contamination by radionuclide leakage is of significant concern. Because of its cost-effectiveness and environmental friendliness, biochar has attracted a lot of attention in the field of radioactive water treatment. Herein, a novel teak peel modified biochar (labeled as PMBN3) was prepared and applied to remove strontium from artificial seawater. The characterisation of the prepared PMBN3 showed it contains numerous oxygen-containing functional groups (i.e. carboxyl and hydroxyl groups), laminar morphology, mesoporous structure, large specific surface area. PMBN3 exhibited great advantages in Sr(II) adsorption, such as rapid adsorption kinetics (<1 h for equilibrium) and superior reusability. The adsorption of strontium by biochar is consistent with pseudo-second order and internal diffusion kinetic models. Among the four types of adsorption isotherms, the Freundlich isotherm showed the best fit with R2 > 0.98. The calculated thermodynamic parameters indicate that strontium adsorption on biochar occurs exothermically and spontaneously. Furthermore, for efficient removal of Sr(II), CO2 nanobubbles were blown into artificial seawater to precipitate the interfering metal ions, and followed by the adsorption of PMBN3 towards residual metal ions with the removal rate of Sr(II) over 99.7%. Finally, mechanistic studies have shown that the strontium adsorption process by PMBN3 is a multiple adsorption mechanism consisting of ion exchange between H+ (from -OH and -COOH) and Sr(II), and weak intermolecular forces between Sr(II) and the PMBN3 adsorbent. This study creatively combines chemisorption and nanobubble precipitation for strontium removal, which provides great reference value and guidance for environmental remediation.
研究领域:
环境科学
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放射性污染治理
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）