CHEMISTRY OF MATERIALS
·
2025
·
IF 7
Jiulin Hu,Qijie Yu,Meng Lei,Yongfeng Li,Yuhan Zeng,Chilin Li
Solid-state Na metal batteries are among the promising next-generation electrochemical energy storage systems due to their abundant resources and high energy density. It is of great significance to develop novel Na-based solid electrolyte prototypes and customized synthesis strategies. Fluoride Na+ solid electrolytes are expected to have the best air stability and the widest electrochemical stable window, but their low ionic conductivities (often 10–6 to 10–7 S/cm at room temperature) are still a shortcoming. In this work, we report a low-temperature ionic liquid (IL) method for the synthesis of nanostructured binary-phase sodium-rich fluoride solid electrolytes Na3AlF6/Na5Al3F4, both with open-framework structures. This composition electrolyte is dually reinforced by heterointerface construction and grain-boundary decoration. The solidified IL derivatives can serve as an in situ binder surrounding fluoride nanoparticles, which can strengthen the entire electrolyte pellet and reduce its tendency to crack and pulverize during electrochemical cycling. The heterogeneous Na3AlF6/Na5Al3F14 nanodomains are in contact with each other in electrolyte particles, and the interfaces between Na3AlF6 and Na5Al3F14 enable the faster Na+ transport with lower diffusion energy barrier. Na3AlF6/Na5Al3F4 achieves a high ionic conductivity (in a level of 10–4 S/cm at 40 °C), which is among the highest levels currently achieved by sodium fluoride solid electrolytes. This fluoride solid electrolyte has excellent electrochemical stability toward Na metal, and there is no dendrite formation on the surface of the Na anode after cycling, benefiting from the formation of uniform NaF, NaCl, and Na3N as Na+ conductive components at the interface between the anode and electrolyte. The solid-state Na/Na3AlF6/Na5Al3F14/Na3V2(PO4)3 batteries can deliver a capacity of 109 mAh/g and successfully run for at least 140 cycles at 60 °C. The multiscale in situ modifications of heterogeneous interfaces and particle boundaries for accelerated ion migration provide solutions to high-conductivity nanostructured electrolytes for sustainable solid-state batteries.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Ruzhen Zhao,Ziwen Ying,Hao Sun,Qifeng Wei,Xiulian Ren
Lithium extraction has become a hot topic because of global efforts to control carbon emissions. However, the efficient separation of Li/Na is a great challenge. In this study, the lithium carbonate precipitation mother liquor with Li + content of 1.7910 g/L and Na + content of 111.2438 g/L was used as the raw material solution. Due to its high Na/Li ratio, we found that the affinity of nonylphenol oxygen anion with Li + is stronger than that with Na + through quantum chemical analysis. And through the optimization of the effects of saponification degree, pH, temperature, and phase ratio, after twelve rounds of a five-stage countercurrent extraction, the E Li (%) reached 99% and the maximum β Li/Na reached 114799.73. After scrubbing with 0.5 mol/L HCl + 0.5 g/L LiCl solution and stripping with 2 mol/L HCl solution, Li + and Na + could be effectively separated. This study proved that nonylphenol oxygen anion had a significant effect on the extraction of Li + , and could effectively separate Li + from Na + , which brings a new idea for the treatment of high Na/Li solution.
研究领域:
化学工程
·
材料科学
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DOI
高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Chunying Chen,Jinjun Ren,Qing Jiao,Jingping Tang,Lili Hu
Joint doping with trivalent and monovalent ions is a widely adopted strategy to enhance the ionic conductivities of NASICON-type solid-state electrolytes (SSEs) with the general formula Na1+xZr2SixP3–xO12, but the underlying microscopic mechanism remains unclear. In this study, we synthesized a series of Na3+xLaxZr2–xSi2PO12 (NLZSPx, 0 ≤ x ≤ 0.4) ceramics and characterized their electrical properties and structures by using electrochemical impedance spectroscopy (EIS), X-ray diffraction (XRD), scanning electron microscopy (SEM), and advanced solid-state nuclear magnetic resonance (SSNMR). Among all of the samples, the composition with x = 0.2 exhibited the highest ionic conductivity, achieving 1.05 × 10–3 S/cm at 25 °C, which is 3.65 times higher than that of the undoped sample. XRD and SSNMR results prove that La3+ ions did not integrate into the main phase lattice to replace Zr4+ ions. Instead, they formed a heterogeneous phase predominantly composed of Na3La(PO4)2 at the grain boundaries. The content of Na3La(PO4)2 and the composition of the NASICON main phase were accurately determined by SSNMR. This impurity resulted in changes in the Si/P and Na/Zr ratios within the main phase. Some comparison experiments are carried out and prove that these changes were not the principal drivers of the increased conductivity. SEM results further indicated that doping with an appropriate amount of La3+ ions significantly increased the sample densification, thus promoting Na+ ions transport between grain boundaries─this being the key factor driving the observed improvement in ionic conductivity.
研究领域:
材料科学
·
固体物理
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DOI
高影响因子
TALANTA
·
2022
·
IF 6.556
Shan He,Wen-Le Fang,Xiao-Feng Guo,Hong Wang
Redox homeostasis is the guarantee for the normal operation of living organisms. Given its importance, monitoring dynamic changes of redox state will facilitate the study of relevant physiological and pathological processes. Herein, a two-photon fluorescent probe NA-Se with selenomorpholine as the response site has been developed for reversible detection of redox state. NA-Se exhibits outstanding analytical performance, including a rapid response to ClO − within 8 s, a detection limit as low as 13.3 nM, and at least 10 redox reversible cycles. Furthermore, NA-Se has improved water solubility and extremely low cytotoxicity, making it ideal for bioimaging. Finally, NA-Se has been successfully applied to monitor the ClO − /GSH redox cycle in living cells and zebrafish. This work may provide an effective tool for studying redox state and related diseases in vivo.
研究领域:
生物化学
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医学影像
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细胞生物学
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2026
·Vol. 109
·期 10
·e71260
·
IF 4.2
Bohan Wang,Dengke Zhao,Shijia Zhang,Zhiheng Ma,Shuo Zhao,Kexin Chen,Guanghua Liu
α-SiAlON, as a solid solution of α-Si 3 N 4 , exhibits excellent mechanical properties, making it attractive for structural applications at both room and elevated temperatures. α-SiAlON ceramics stabilized by Li, Mg, Ca, Y, Mn, and rare-earth cations have been extensively investigated. In contrast, Na-stabilized α-SiAlON has received little attention, and the synthesis of single-phase Na α-SiAlON has not yet been reported. In this work, nearly single-phase Na α-SiAlON powders were prepared by combustion synthesis for the first time. The effects of starting composition and α-Si 3 N 4 diluent content on the phase composition and microstructure of the synthesized products were systematically investigated. Increasing the m and n values promoted the formation of α-SiAlON and suppressed the formation of β-SiAlON. The α-Si 3 N 4 diluent content strongly influenced the phase evolution and microstructure of the products. Nearly single-phase Na α-SiAlON powders were obtained at an appropriate α-Si 3 N 4 diluent content. The Na α-SiAlON powders mainly consisted of rod-like and equiaxed grains. Based on the experimental results, a dual-pathway formation mechanism was proposed, involving the direct precipitation of α-SiAlON crystal from a supersaturated Na–Si–Al–O–N liquid phase and heterogeneous nucleation on undissolved α-Si 3 N 4 particles. This work establishes combustion synthesis as an effective route for the preparation of high-purity Na α-SiAlON powders and advances the understanding of their formation mechanisms.
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DOI
高影响因子
Advanced Energy Materials
·
2024
·
IF 24.4
Wenliang Feng,Chenchen Meng,Xiaolong Guo,Bin Wu,Xulei Sui,Zhenbo Wang
Na-ion hybrid capacitors (NICs) are known for their potential to integrate high power and energy density along with superior lifespan into a single energy storage device. However, the practical implementation of NICs is delayed due to their inadequate energy densities (<100 Wh kg −1 ), which is a result of the lack of anodes with rapid Na-ion diffusion kinetics to match the cathodes. To accelerate Na-ion diffusion kinetics, cobalt-doped TiO 2 (Co x Ti 1−x O y ) nanosheet anodes with reconstructed low-energy barrier channels for Na-ion transfer are designed. Crystal defects, including nanointerfaces, Ti interstitials, and oxygen vacancies, are intentionally introduced to the Co x Ti 1−x O y structure to improve its conductivity and induce pseudocapacitive-type Na-ion storage. Moreover, these crystal defects subtly alter the Na-ion transfer pathways in the bulk Co x Ti 1−x O y and reduce the energy barrier, as confirmed by density functional theory (DFT) simulations. Rapid Na-ion diffusion kinetics can minimize the kinetics discrepancy between anodes and cathodes, presenting great potential for achieving high-performance anodes for NIC applications. When integrated with activated carbon/reduced graphene oxide composite (AC/rGO) cathodes, the fabricated NICs demonstrate remarkable energy density (164 Wh kg −1 at 31 W kg −1 ), power density (8307 W kg −1 at 56 Wh kg −1 ), and an ultralong lifespan (83% capacity retention after 15000 cycles).
研究领域:
材料科学
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能源存储
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纳米技术
·
电化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Han Li,Qile Zhao,Huan Zhang,Jinfang Wu,Zexu Zhang,Yue Yin,Wenbo Wang,Fang Guo
Adsorption techniques are crucial for removing high and trace levels of heavy metal pollutants from water, enabling effective pollution control without causing secondary contamination. Achieving “all-rounder” adsorbents with high capacity, efficiency, speed, and cost-effectiveness is challenging. Materials with structural defects, firm surface charges, and porous structures are ideal for rapid and efficient mass transfer. Herein, using a “homologous transformation” strategy, we converted abundant kaolin into 4A and Na-P1 zeolites-based porous silicate adsorbents with enhanced surface active sites and optimized adsorption pathways. Site energy analysis confirmed that these upgraded structures have high-density, high-energy adsorption sites, facilitating rapid Pb(II) removal from water. These zeolite-based adsorbents exhibit exceptional Pb(II) adsorption capacities (416.60 mg/g for 4A and 400.21 mg/g for Na-P1) and ultra-fast initial rate constants (409.84 and 617.28, which are 174.62 and 263.01 times greater than those of kaolinite; and 56.56 and 85.19 times greater than those of commercial activated carbon, respectively). DFT calculations verified strong adsorption forces for Pb(II) (adsorption energy: −0.52 eV). Removal efficiencies reached 99.75 % for 4A and 99.96 % for Na-P1 zeolite-based adsorbents, ensuring treated water is safe and supports seed germination and plant root growth. These adsorbents also perform well in the presence of interfering ions like Zn(II), Cu(II), Cd(II), and Ni(II). After 10 regeneration cycles, they retain over 73 % of their original capacity, demonstrating an optimal balance among capacity, speed, efficiency, and interference resistance, aligning with sustainable development principles of “from nature, for nature”.
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 SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Xiang Qin,Rong Cao,Wensheng Gong,Liping Luo,Guojun Shi,Lijun Ji,Aiping Zhu
ZnCdS/TiO 2 /Na-MXene composites were prepared by a hydrothermal process to obtain an excellent photocatalyst with photo-corrosion resistant property. Under hydrothermal conditions, the surface of Ti 3 C 2 MXene was wrapped by Na + and ZnCdS nanoparticles , which slowed down the further oxidation of Ti 3 C 2 MXene into TiO 2 and improved the utilization rate of MXene. The adsorption capacity of an optimal ZnCdS/TiO 2 /Na-MXene composite to methylene blue reached 299.68 mg/g, confirming a higher MXene content was important for photocatalytic degradation of an organic dye. The basal distance of the MXene layers increased from 10.59 Å to 15.21 Å due to the intercalation of ZnCdS, which could facilitate the transportation and adsorption of organic pollutant in ZnCdS/TiO 2 /Na-MXene. The total removal efficiency was 9.3 times that of ZnCdS in 120 min. When the composites were used for photocatalytic hydrogen production , a relatively higher ZnCdS content was necessary. The hydrogen conversion efficiency of an optimal ZnCdS/TiO 2 /Na-MXene composite under visible light irradiation reached 8436.58 μmol·g −1 ·h −1 , which was 3.3 times that of ZnCdS. The ZnCdS/TiO 2 /Na-MXene composites showed excellent and stable photocatalytic activity in recycling experiments, confirming their excellent photo-corrosion property. These ZnCdS/TiO 2 /Na-MXene composites showed great potential in the application of photocatalytic degradation and hydrogen production, and provided a new way to reduce the oxidation process of Ti 3 C 2 MXene.
研究领域:
材料科学
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环境科学
·
能源科学
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DOI
高影响因子
CATALYSIS TODAY
·
2020
·
IF 5.825
Fei Yuan,Guanghui Zhang,Jie Zhu,Fanshu Ding,Anfeng Zhang,Chunshan Song,Xinwen Guo
Direct conversion of carbon dioxide (CO 2 ) into lower olefins (C 2 -C 4 = ) is highly attractive as a sustainable production route for its great significance in greenhouse gas emission control and fossil fuel substitution. Fe-based catalysts have been extensively studied in CO 2 hydrogenation, which usually show unsatisfactory selectivity toward lower olefins. Here we present a high-dispersion catalyst precursor CoFe 2 O 4 with Na (Na-CoFe 2 O 4 ) that offers C 2 -C 4 = space time yield as high as 2.88 μmol C2-C4= g cat −1 s -1 and olefin to paraffin ratio about 6 at CO 2 conversion higher than 41 %. High dispersion and the intimate contact between Fe and Co sites help inhibit the formation of methane, and favor a higher selectivity of C 2 + hydrocarbons, especially lower olefins. The presence of Na further promotes chain growth and suppresses the direct hydrogenation of Fe-(CH 2 ) n intermediates. A superior stability over 100 h was observed, demonstrating the promising potential of this catalyst for industrial applications.
研究领域:
催化化学
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环境科学
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材料科学
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DOI
高影响因子
ACS Catalysis
·
2021
·
IF 13.084
Ting Wang,Yuebing Xu,Yufeng Li,Lei Xin,Bing Liu,Feng Jiang,Xiaohao Liu
Conversion of syngas into aromatics via the Fischer–Tropsch (FT) route provides a promising way to supply the value-added chemicals. However, it is still a great challenge to achieve controllable aromatics selectivity with good stability. Herein, we report the Na-mediated bimetallic Fe–Ni catalyst simply particle mixed with HZSM-5, which can boost the stable and selective production of aromatics from the syngas. In detail, FeNiOx(5:1)-0.41Na exhibits quite stable catalytic activity with notably higher selectivity to light α-olefins (C2=–C4=) compared to α-Fe2O3-0.75Na. Various characterizations suggest that an appropriate addition of Ni with Na substantially regulates iron carbide formation and suppresses carbon deposition owing to the electron donation of Fe to Ni reducing CO adsorption and dissociation. Interestingly, extra Na results in remarkably increased selectivity to C1o–C4o, despite the fact that Na shows the ability to suppress hydrogenation. Both characterizations and density functional theory (DFT) calculations demonstrate that the addition of Na weakens the Fe–Ni interaction and reduces electron transfer from Fe to Ni, which promotes C1o–C4o formation as Ni tends to reflect its intrinsic catalysis. DFT calculations confirm that the adsorbed CH2 species at the Ni–Fe interface prefers to undergo coupling to form C2H4, and the formed C2H4 spontaneously desorbs from the surface, indicating that the formation of lower olefins is favorable and further chain growth is inhibited. This could be attributed to the fact that the accumulated electron at the Ni–Fe interface weakens the binding strength of CH2 and C2H4 species because of electronic repulsion. Furthermore, the effects of FT product distribution on aromatics formation were also investigated. FeMnOx(5:1)-0.40Na produces longer olefin-rich hydrocarbons in C5+ owing to oxygen vacancy-assisted CO dissociation, leading to highly branched monocyclic aromatics and faster HZSM-5 deactivation because of increased coking from the isomerization–hydrocracking of long hydrocarbons. In contrast, FeNiOx(5:1)-0.41Na-HZSM-5 produces major light aromatics about 65.7% including toluene, ethyl-benzene, and xylene in total aromatics with about 98.6% aromatics in the liquid phase, which benefits from the fact that FeNiOx(5:1)-0.41Na makes shorter hydrocarbons in C5+ and/or Ni metal has a strong ability of H2 dissociation to provide atomic H spillover onto HZSM-5. Thus, HZSM-5 also shows improved stability. Note that the mixed catalysts with a high Na content indicate a substantial Na+ migration to increase light α-olefins in the gas phase owing to suppress H-transfer reaction. This study provides deep insights into how to develop stable and selective iron-based catalysts for the production of FT products and its further conversion into value-added light aromatics.
研究领域:
催化化学
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材料科学
·
能源化学
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DOI
高影响因子
ENVIRONMENTAL TOXICOLOGY
·
2013
·Vol. 29
·期 12
·1460-1470
·
IF 2.708
Mingbao Feng,Ruijuan Qu,Ying Li,Zhongbo Wei,Zunyao Wang
Hexabromobenzene (HBB) is a novel brominated flame retardant (BFR) with ample evidence of its ubiquitous existence in the aquatic ecosystems. However, to date, the toxicological effects of this BFR on fish have been inadequately researched. The present study was conducted, based on an in vivo model, to investigate HBB-induced biochemical changes in liver and gill tissues of Carassius auratus after medium-term exposure to different concentrations (10, 150, and 300 mg/kg) for 7, 14, and 25 days. Oxidative stress was evoked evidently for the prolonged exposure, demonstrated by significant inhibition in antioxidant enzymes activities including superoxide dismutase, catalase, glutathione reductase, glutathione peroxidase, and glutathione S-transferase, and a decrease in reduced glutathione level, as well as simultaneous elevation in malondialdehyde content. Moreover, Na + , K + -ATPase activity, and protein level were remarkably reduced in fish tissues. Based on the integrated biomarker response, the toxic potency in each treatment was distinguished, and the more severe stress was mainly noted with the increasing concentrations and the extending durations. It was also observed that liver exhibited more pronounced alterations in biochemical parameters than gill, probably indicating the vulnerability of liver to HBB-triggered oxidative stress. Taken together, the results of this study clearly showed that HBB was capable of inducing oxidative stress and inhibiting Na + , K + -ATPase activity in different tissues of C. auratus after medium-term exposure. © 2013 Wiley Periodicals, Inc. Environ Toxicol 29: 1460–1470, 2014.
研究领域:
环境毒理学
·
水生生态学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Sen Yang,Yinghao Wei,Qi Wang,Zhijun Sun,Ai-Hua Li
Lead-free double perovskites have superb luminescence properties for broad applications. However, increasing or improving near-infrared (NIR) photoluminescence (PL) is still a challenge. In this paper, a high-performance microcrystal is designed based on Tm 3+ heavily doped Cs 2 Ag 0.6 Na 0.4 In 0.9 Bi 0.1 Cl 6 (CANIBC), which realize both the self-trapped excitons (STEs) and Tm 3+ NIR emission. The emission mechanism and energy transfer (ET) process are studied by steady-state and time-resolved PL spectra. The ET efficiency from STEs to Tm 3+ can reach 38.3 %, and the NIR PL quantum yield of Tm 3+ can reach 22.7 %. Meanwhile, the PL spectra of Tm 3+ -doped CANIBC microcrystals (MCs) with different concentrations are used to investigate their temperature sensing properties based on both fluorescence intensity ratio (FIR) and lifetime. Based on the FIR, relative sensitivity ( S r ) can reach 2.93 % K −1 at 303 K. Moreover, based on lifetimes, S r can maintain more than 1.55 % K −1 from 303 to 453 K, and maximum S r can also achieve 2.38 % K −1 at 360 K. These excellent luminescence and sensing properties offer greater development potential in the field of NIR phosphor and thermometry.
研究领域:
材料科学
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光学
·
纳米技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）