ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Lin Cheng,Si-Yu Li,Yu-Jie Zhang,Xin Meng,Ying Wang,Shuaihua Wang,Kai-Yao Wang
Innovation of 137 Cs + and 90 Sr 2+ ion exchangers is achieved through heteroatom-bridged integration of polyoxovanadate clusters, whose soft Lewis basic nature and large size promote the selective capture of cesium/strontium radionuclides. The radiolytically stable Na 6 P 4 V 10 O 34 ·19H 2 O ( VPO-1 ) features an interlinkage of {NaV 10 O 26 } clusters and phosphorus bridges, forming nanoscale voids with hydration-lubricated sodium ions. This structure endows VPO-1 with remarkable exchange kinetics ( k 2 Cs = 3.774 g mg −1 min −1 ; k 2 Sr = 1.376 g mg −1 min −1 ), equilibrium removal ( R > 99.3% within 5–10 min), and maximum capacities ( q m Cs = 300.32 mg g −1 ; q m Sr = 113.00 mg g −1 ). The exchange mechanism is illuminated through single-crystal XRD by revealing cluster-vacancy pathways and ionic-radius-dependent adsorption sites. VPO-1 exhibits stability across pH = 3–12, with exceptional K d Cs and K d Sr values above 10 5 mL g −1 , and high selectivity for Cs + and Sr 2+ over various competing ions. These properties enable excellent column filtration performance ( R = 99%–100%) for mixed Cs + and Sr 2+ during a 3000 mL test. Deep cleaning of these ions is also possible via suction filtration using an ultra-thin VPO-1 /PTFE membrane, with high exchange activity ( R = 98.8%–99.9%) retained after simple regeneration with 2 m NaCl, offering significant potential for nuclear wastewater treatment applications.
研究领域:
材料科学
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环境科学
·
放射化学
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DOI
高影响因子
Journal of the American Chemical Society
·
2018
·
IF 14.357
Mei-Ling Feng,Debajit Sarma,Yu-Jie Gao,Xing-Hui Qi,Wei-An Li,Xiao-Ying Huang,Mercouri G. Kanatzidis
Unconventional ion exchangers can achieve efficient removal of [UO2]2+, Cs+, and Sr2+ ions from complex aqueous solutions and are of great interest for environmental remediation. We report two new gallium thioantimonates, [Me2NH2]2[Ga2Sb2S7]·H2O (FJSM-GAS-1) and [Et2NH2]2[Ga2Sb2S7]·H2O (FJSM-GAS-2), which present excellent ion exchange properties for [UO2]2+, Cs+, and Sr2+ ions. They exhibit high ion exchange capacities for [UO2]2+, Cs+, and Sr2+ ions (qmU = 196 mg/g, qmCs = 164 mg/g, and qmSr = 80 mg/g for FJSM-GAS-1, qmU = 144 mg/g for FJSM-GAS-2) and short equilibrium times for [UO2]2+ ion exchange (5 min for FJSM-GAS-1 and 15 min for FJSM-GAS-2, respectively). Both compounds display active ion exchange with [UO2]2+ in the pH range of 2.9–10.5. Moreover, the sulfide compounds could maintain high distribution coefficients KdU even in the presence of excess Na+, Ca2+, and HCO3–. The distribution coefficient KdU of 6.06 × 106 mL/g exhibited by FJSM-GAS-1 is the highest among the reported U adsorbents. The [UO2]2+-laden products can be recycled by conveniently eluting the uranium with a low-cost method. These advantages combined with facile synthesis, as well as β and γ radiation resistance, make FJSM-GAS-1 and FJSM-GAS-2 promising for selective separations in nuclear waste remediation.
研究领域:
环境科学
·
材料科学
·
核化学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Fei-Fei Wang,Yu-Hang Li,Ze-Jia Shen,Ze-Yu Wang,Lin Cheng,Shuaihua Wang,Kai-Yao Wang
Construction strategy for selenide exchanger by integrating T3 supertetrahedral clusters. • Synergistic effects of Se component and microporosity on the adsorption kinetics enhancement. • Efficient removal (up to 99.99%) of Cs + and Sr 2+ by column and ultrathin membrane. • High selectivity for Cs + and Sr 2+ in presence of excess coexisting cations and anions. • Great pH (3–12)/irradiation resistance, high exchange selectivity, and facile elution. Elimination of long half-lived 137 Cs + and 90 Sr 2+ hazards through adsorption technique is critical for environmental protection and human health. However, traditional adsorbents are limited in radioactive wastewater treatment by slow kinetics, weak anti-interference, and poor practical applicability. Herein, an indium selenide adsorbent Na 6 In 10 Se 18 ·11.5H 2 O ( InSe-1Na ), with an anionic framework constructed from corner-sharing T3 supertetrahedral clusters, was synthesized using a “assembly-activation” strategy. The soft basic Se component and the cluster-induced microporosity synergistically endow InSe-1Na with remarkable Cs + /Sr 2+ enrichment capacity. It exhibits ultra-fast adsorption kinetics, removing 97.84% of Cs + within 5 min and 99.84% of Sr 2+ within 20 min. The corresponding second-order rate constants ( k 2 ) are 10.241 and 0.335 g mg −1 min −1 , respectively, rendering it the fastest selenide adsorbent. InSe-1Na shows structural stability over a broad pH range of 3–12, with maximum distribution coefficients ( K d ) of 1.02 × 10 5 mL g −1 for Cs + and 8.29 × 10 5 mL g −1 for Sr 2+ . The maximum adsorption capacities ( q m ) of Cs + and Sr 2+ are 252.10 ± 3.77 and 86.49 ± 3.71 mg g −1 , respectively. It exhibits resistance to coexisting ions, maintaining a removal rate ( R ) ≥ 94.73% in the presence of 10 mmol L −1 Na + . Moreover, the rapid kinetic response facilitates its application in column ( R = 99.65%–99.99%) and membrane ( R = 98.95%–99.98%, 0.40 s contact time) filtrations for mixed Cs + and Sr 2+ flow. Given its straightforward synthesis, β/γ irradiation tolerance, and easy elution, InSe-1Na represents a promising adsorbent for radioactive decontamination. Deep purification of nuclear contaminated water containing radioactive 137 Cs + and 90 Sr 2+ is promisingly achieved by a supertetrahedral-cluster-constructed indium selenide ion exchanger, Na 6 In 10 Se 18 ⸱ 11.5H 2 O ( InSe-1Na ), whose soft Se component and microporosity endow this material with top-ranked adsorption kinetics (even in suction filtration conditions with 0.40 s contact time), high capacities, superior selectivity, good resistance to acid/base/coexisting ions, and remarkable column/membrane performances. Download: Download high-res image (131KB) Download: Download full-size image
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Chenchen Shi,Dong Guo,Bowen Liu,Yibei Wang,Yaowei Liu,Gaobin Liu,Biao Wang,Dongchao Qiu,Yuntao Ma,Chunling Lu,Bingbing Niu
Developing fuel electrodes with excellent structural stability and high catalytic activity under various fuel conditions is highly desirable for large-scale applications of solid oxide cells (SOCs). In this study, double perovskite Sr 2- x FeTaO 6-δ ( x = 0, 0.1, 0.2, 0.3) materials were designed as fuel electrodes for SOCs. Sr 1.8 FeTaO 6-δ (S18FT) was synthesized in air, and its structural stability could be maintained in both 5 % H 2 /Ar and pure CO 2 after calcination at 850 ℃ for 10 h. The thermal expansion coefficient of S18FT was 11.8 × 10 −6 K −1 at 50–850 ℃. To further improve the electrochemical performance of the S18FT electrode, it was impregnated with Pd(NO 3 ) 2 to form a composite electrode (Pd-SFT–SDC). When hydrogen, propane, ethyl ethanol, and biochar were used as fuels, the maximum power densities of the fuel cells at 850 ℃ were 1114, 370, 474, and 291 mW cm −2 , respectively. The fuel cell operated stably for 300 h when using propane. When the solid oxide electrolysis cell mode was used for the co-electrolysis of CO 2 /H 2 O, the current density was −0.835 A cm −2 at 1.3 V and 800 ℃. These results indicated the potential for the use of the Pd-SFT–SDC composite material as a fuel electrode for SOCs.
研究领域:
材料科学
·
能源工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Ziquan Wang,Ping Ye,Zhujie Liang,Zengye Chen,Fengcheng Yang,Yoshio Bando,Libo Deng
With the widespread application of nuclear energy, the risk of radioactive wastewater containing Sr 2+ is increasing. Flow-electrode capacitive deionization (FCDI) based on carbonaceous materials is an emerging desalination technique with great promise for treating micro-polluted Sr 2+ wastewater. However, understanding of the key factors that govern the performance is still lacking due to complex mass and electron transfer across multi-scales. Herein, we elucidated the influence of the electric-, concentration- and heat- fields on the deionization performance in FCDI, through which a strategy to enhance the performance for selective removal of Sr 2+ was developed. Such a strategy was fulfilled by first constructing flowing electrodes using two types of one-dimensional carbon nanomaterials with similar pore structure but differ significantly in electrical conductivity. By optimizing properties of the flowing electrode and operation conditions, the driving forces originated from electric-, concentration- and heat-fields were enhanced, delivering a high removal rate of 5.29 μg SrCl 2 cm −2 min −1 and a low energy consumption of 2.89 J g −1 SrCl 2 . The effects of field strength unraveled and the FCDI system constructed in this study would pave the way for practical applications of this technology.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2023
·
IF 5.4
Yu Zhang,Kai Li,Xuelian Zhou,Kaixuan Wang,Ze Wang,Sur Lig,Kefu Chao,Fengqi Zhao
Cr 3+ -doped near-infrared phosphors have recently attracted a wide attention. Here, NIR Ca 1- y Sr y Al 12- x Ga x O 19 :0.12Cr 3+ phosphors are obtained by a high-temperature solid-phase method. First, a series of CaAl 7.88 Ga 4 O 19 :0.12Cr 3+ samples is studied and shows that the crystal field strength can be tuned by cation substitutions, until achieving a sharp emission at 692 nm and a broad emission at 780 nm under a 400 nm excitation, and an internal quantum yield of 90.73%. A further substitution by an appropriate amount of Sr 2+ is suggested to be beneficial to increase the rigidity of the crystal structure by Debye temperature calculations. Experimentally, it is observed that Sr 2+ for Ca 2+ substitutions did not affect the luminescence wavelength and resulted in a significant increase of the thermal stability. When 0.7 Sr 2+ substitute Ca 2+ , the thermal stability at 450 K increased by 28% compared to the samples without Sr 2+ .
研究领域:
材料科学
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无机化学
·
固体物理
·
光学材料
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功能材料
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Xiaofeng Zhao,Weipeng Wang,Yuancheng Teng,Yuxiang Li,Xue Ma,Yang Liu,Rajeev Ahuja,Wei Luo,Zhengjun Zhang
Rhabdophane is an important permeable reactive barrier to enrich radionuclides from groundwater and has been envisaged to host radionuclides in the backend of the nuclear fuel cycle. However, understanding of how An4+ and Sr2+ precipitate into rhabdophane by wet chemistry has not been resolved. In this work, Th4+ and Sr2+ incorporation in the rhabdophane/monazite structure as La1–2xSrxThxPO4·nH2O solid solutions is successfully achieved in the acid solution at 90 °C. Some specific issues such as lattice occupation of Th4+ and Sr2+, precipitation reaction kinetics, and crystal growth affected by starting stoichiometry are discussed in detail, along with investigating the chemical stability of La1–2xSrxThxPO4·nH2O precipitations and associated La1–2xSrxThxPO4 monazite. The results reveal that the excess of Sr2+ appears to be a prevailing factor with a suggested initial Sr: Th ≥ 2 to obtain the stability domain of La1–2xSrxThxPO4·nH2O (x = 0∼ 0.1). A rapid ion removal associated with a nucleation process has been observed within 8 h, and Th4+ can be removed more than 98% after 24 h in 0.01 mol/L solutions. From structural energetics based on density functional theory, the lattice occupation of Th4+ and Sr2+ is energetically favorable in nonhydrated lattice sites of [LaO8], although two-thirds of lattice sites are associated with [LaO8·H2O] hydrated sites. Intriguingly, the crystal transformation from rhabdophane to monazite associated with the transformation from [SrO8] to [SrO9] polyhedra can greatly improve the leaching stability of Sr2+.
研究领域:
核化学与放射化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 24
·14608-14618
·
IF 10.7
Ruixi Liu,Qian Zhao,Zeru Wang,Rui Jiang,Chuancong Lin,LinZhen Wu,Guangyuan Chen,Pan He,Lin Zhu,Jing Chen,Tao Duan
Effective capture of the radionuclide strontium is essential for the sustainable development of nuclear energy. Zirconium phosphate, with its tunable interlayer spacing and excellent ion exchange properties, holds potential applications in this field. In this work, a calcium zirconium phosphate (Ca0.55ZrH0.9(PO4)2) with ultra-wide spacing was obtained by means of layer spacing modulation. The saturable adsorption capacity of this material for Sr2+ was close to twice that of commercial zirconium phosphate, reaching 226.9 mg g−1. Particularly noteworthy is its saturation adsorption capacity at pH = 1, which is 6.7 times higher than that of commercial ZrP. Leveraging Ca2+ involvement in ion exchange reactions, calcium zirconium phosphate exhibits exceptional selectivity for Sr2+ capture in simulated acidic competitive ion solutions. Moreover, it demonstrates outstanding acid resistance and radiation tolerance. Through a comprehensive approach involving characterization techniques, experimental analyses, and density functional theory calculations, we elucidated its potential adsorption mechanisms at the molecular level. Crucially, the material synthesis and experimental processes are free from harmful ion byproducts, rendering it amenable to large-scale production. This advancement provides a promising avenue for the efficient capture of Sr2+ in practical wastewater treatment scenarios.
研究领域:
材料科学
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环境科学
·
核能技术
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产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2025
·
IF 7.2
Henglong Dai,Mujing Qu,Jiaxin Duan,Jiajun Hou,Haojie Ding,Xiaohong Chen,Huili Li
Rare earth-based perovskite nanocrystals CsEuX 3 (X = Br, Cl, or I) have emerged as an ideal alternative system to toxic lead-based halide perovskites due to the lead-like characteristics of Eu 2+ ions (similar ionic radius, identical valence state and coordination number) and their unique luminescent properties: narrow-band blue emission with a full width at half maximum (FWHM) ≤ 25 nm from 5d→4f transitions. However, the relatively low photoluminescence quantum yield (PLQY) and poor environmental stability especially for CsEuCl 3 nanocrystals have seriously hindered their applications. To address these issues, a dual strategy based on strontium ion (Sr 2+ ) doping and thermoplastic polyurethane (TPU) coating is proposed to synergistically modify CsEuCl 3 nanocrystals in this paper. TPU@CsEuCl 3 :Sr 2+ nanocrystals films with significantly improved environmental stability and PL properties were successfully prepared. The partial substitution of Sr 2+ for Eu 2+ reduces the surface defects of nanocrystals and mitigates the oxidation of Eu 2+ . As a result, the ratio of Eu 2+ /Eu 3+ increases from 3.9% of undoped sample to 6.0% for CsEuCl 3 :Sr 2+ and PLQY correspondingly enhances from 5.04% to 13.88%. Further encapsulation with flexible TPU introduces a hydrophobic surface that effectively blocks the erosion of water and oxygen in the environment on nanocrystals. The ratio of Eu 2+ /Eu 3+ in the TPU@CsEuCl 3 :Sr 2+ nanocrystals film markedly increases from 6.0% to 39.9%, and PLQY slightly improves to 14.02%. Most importantly, the environmental stability of the film is greatly enhanced. After ultraviolet irradiation in air for 150 min, PL intensity of nanocrystal film still retains 69.5% of its initial value, whereas the undoped and uncoated sample completely loses its luminescent properties after only 60 s.
研究领域:
材料科学
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纳米技术
·
光电子学
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发光材料
·
钙钛矿纳米晶
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产品关联
DOI
高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2016
·Vol. 32
·期 8
·2052-2058
·
IF 0.844
JIAN Yuan,MU Wan-Jun,LIU Ning,PENG Shu-Ming
The adsorption of Sr2+ ions onto Ta-doped hex-WO3 nanomaterials was studied by measuring the zeta potentials of the powder nanoparticles and by determining the adsorption isotherm and adsorption mechanism. Five important results were obtained: (1) the zeta potential
values of the Ta-doped hex-WO3 suspensions in different electrolyte solutions, within the studied pH ranges, increased with an increase in electrolyte valence; and (2) the zeta potential of the Ta-doped hex-WO3 suspensions increased with an increase in ionic strength.
(3) Sr2+ ion adsorption increased with a decrease in temperature and ionic strength. (4) The adsorption enthalpy was calculated as 47 kJ·mol-1, and the interaction between the Ta-doped hex-WO3 surface and Sr2+ ions was concluded to be chemical
in nature. (5) The adsorption of Sr2+ ions onto the Ta-doped hex-WO3 was attributed to surface chemical adsorption and ion exchange (in tunnels).
研究领域:
环境化学
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材料科学
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吸附技术
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纳米材料
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放射性废物处理
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DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 9
·3967-3976
·
IF 9.931
Yu-Jie Gao,Mei-Ling Feng,Bo Zhang,Zhao-Feng Wu,Ying Song,Xiao-Ying Huang
It is of vital importance to capture 137Cs+ and 90Sr2+ from solutions for radionuclide remediation due to their hazardous nature and long half-life. Although metal organic framework (MOF) materials have been greatly developed, the studies of their application in the capture of radioactive cations remain rare. Especially, the capture mechanism has not been clarified. Here, we present a new In-MOF material with the potential for remediation of radioactive Cs+ and Sr2+ ions by ion exchange, namely, [Me2NH2][In(TDC)2]·1.5DMA·1.5H2O (FJSM-InMOF; H2TDC = 2,5-thiophenedicarboxylic acid and DMA = N,N′-dimethylacetamide). It possesses an anionic framework of [In(TDC)2]nn− charge balanced by dimethylammonium cations. It could be easily synthesized via a one-pot solvothermal route. Remarkably, it showed excellent β and α radiation-resistances, high exchange capacities (qCsm = 198.63 mg g−1; qSrm = 43.83 mg g−1), impressive selectivity (KCsd = 7.50 × 104 mL g−1; KSrd = 9.49 × 105 mL g−1), high ion-exchange efficiency (RSr = 99.89%; RCs = 99.63%) and the ability of convenient elution with low cost. In particular, the ion exchange mechanism was illuminated by an unprecedented observation of the single-crystal to single-crystal structural transformation in the Cs+-exchange process. This work paves the way to develop highly efficient and environmentally friendly MOFs for the selective capture of radionuclides.
研究领域:
环境科学
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材料科学
·
核化学与放射化学
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产品关联
DOI
高影响因子
Biomaterials Science
·
2024
·
IF 5.8
Congcong Duan,Hongyue Jiang,Shichen Zhang,Yixing Wang,Peng Liu,Bin Xu,Wenjing Tian,Bing Han
Injuries such as articular cartilage defects are prevalent factors in the development and progression of joint diseases. The discontinuity of the articular surface due to cartilage defects significantly accelerates the onset of arthritis. Cartilage tissue-engineered scaffolds are essential for restoring the continuity of the articular surface. This study presents a dual-network hydrogel, GelMA-FT/Sr2+, which demonstrates excellent lubrication properties and accelerates the healing of cartilage defects. The hydrogel is composed of a methacrylated gelatin (GelMA) network, an N-fluorenylmethoxycarbonyl-L-tryptophan (FT) network, and strontium ions (Sr2+). The results indicate that the hydrogel exhibits lubricating properties, and the incorporation of Sr2+ extends the degradation time of the hydrogel. Additionally, the hydrogel shows biocompatibility and enhances chondrogenic differentiation of bone marrow-derived mesenchymal stem cells (BMSCs) into cartilage. In vivo studies further confirm the hydrogel's efficacy in promoting the repair of cartilage defects in a rat model of cartilage injury. In conclusion, the GelMA-FT/Sr2+ hydrogel is a promising scaffold for cartilage tissue engineering, notable for its excellent lubrication properties, ability to recruit stem cells, and effectiveness in facilitating cartilage defect repair.
研究领域:
生物医学工程
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组织工程
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骨科
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
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