DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 48
·17486-17492
·
IF 4.099
Fangfang He,Lei Wang,Cuifang Hu,Jing Zhou,Qian Li,Ling Huang,Daojiang Gao,Jian Bi,Xin Wang,Guohong Zou
Four antimony fluoride sulfates named A2SO4·SbF3 (A = Na+, NH4+, K+, Rb+) have been successfully synthesized using a hydrothermal method by introducing Sb3+ cations with a stereochemically active lone pair in sulfates and subsequently tuning the structure through the second monovalent cations. All of the title compounds are stoichiometrically equivalent materials which share a common structural motif composed of a distorted SO4 tetrahedron and an asymmetric SbF3 polyhedron. However, the macroscopic centricities of these four compounds are significantly influenced by the size and coordination environment of cations; Na2SO4·SbF3 crystallizes in centrosymmetric space groups Cmca and (NH4)2SO4·SbF3 in Pbca, while K2SO4·SbF3 and Rb2SO4·SbF3 crystallizes in noncentrosymmetric space group P212121. Complete characterization including thermal analyses, infrared and UV-vis spectroscopy, and theoretical calculations is also reported. Powder second harmonic generation measurement for noncentrosymmetric K2SO4·SbF3 and Rb2SO4·SbF3 indicated that both of them are type I phase-matchable.
研究领域:
无机化学
·
材料科学
·
非线性光学
·
晶体工程
·
固态化学
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DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2023
·
IF 6.9
Haoyu Xu,Yuzhou Sun,Zhou Shen,Qing Zhou,Qingyun Zhu,Haifeng Gao,Chao Gao,Xiaoyun Teng,Yu Wei
In this paper, we prepared Na–K co-doped Cu 2 ZnSn(S,Se) 4 (CZTSSe) films by solution method. By optimizing the distribution of the K-doping (uniform or localized K-doping) in the precursor films, the efficiencies of CZTSSe solar cells were improved. The effect of the K-doping distribution on the properties of CZTSSe films and solar cells were investigated. Compared to the solar cells without K-doping, the uniform K-doping in the precursor film increased the solar cell efficiency from 10.4% to 11.7%. In comparison, the localized K-doping in the bottom and in the top of the precursor films yielded solar cells with efficiencies of 12.4% and 10.1%, respectively. It was determined that the K-doping distribution primarily had an influence on carrier recombination in the depletion regions of CZTSSe solar cells. Whereas k-doping at the top of the precursor film greatly enhances the carrier recombination in the depletion region, the bottom doping has the opposite effect. The reason could be that the variation of the K-doping distribution modified the crystallization of the CZTSSe films. As the result, the defect properties of the CZTSSe films were altered. Moreover, the effect of the bottom K-doping on the back contact properties of CZTSSe solar cells was investigated by impedance spectroscopy . Though the K-doping can reduce the back contact barrier of the solar cell, the back contact barrier still achieved the height of 228 meV. The results indicated that the back contact barrier would be an important limiting factor for the efficiency of CZTSSe solar cell.
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 13
·4825-4834
·
IF 5.7
Huijie Wu,Sisi Liang,Weixiong You,Le Liu,Yongwei Guo,Shujian Wang,Liping Song,Zihao Wang,Haomiao Zhu
Near-infrared (NIR) phosphors with emission peak wavelength longer than 800 nm have attracted significant attention due to their wide applications. However, a key challenge lies in developing high photoluminescence (PL) thermal stability phosphors. Herein, we synthesized a NIR phosphor Na3Al2(PO4)2F3:Cr3+ (NAPOF:Cr3+) through the solid-state reaction method. The NAPOF:Cr3+ phosphor exhibits an intense broadband emission peak at 810 nm and covers a wide spectral range from 650 to 1100 nm. Notably, this phosphor demonstrates zero PL thermal quenching even at 398 K. This outstanding thermal stability can be primarily ascribed to the inherent structural rigidity and wide bandgap of the NAPOF crystal together with the medium electron–photon coupling effect. The fabricated broadband NIR light-emitting diodes (LEDs) using the NAPOF:Cr3+ phosphor exhibits a highest NIR light output power of 28.1 mW under a drive current of 150 mA, and a corresponding electro-optical conversion efficiency of 8.6%. Our findings highlight the tremendous potential of the NAPOF:Cr3+ phosphor for broad-spectrum NIR-LED applications.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2026
·
IF 4.4
Yuchen Li,Chenguang Li,Xue Wang,Mingjun Zhou,Lei Wang,Cheng Fang,Gongde Wu,Jing Ding,Hui Wan,Guofeng Guan
CO2 hydrogenation to ethanol is a promising pathway for carbon utilization, yet it remains challenged by the deactivation of iron-based catalysts due to water byproducts and the difficulty in controlling product selectivity. To address these issues, this work constructed hydrophobic MWCNT-supported K–FeCu bimetallic catalysts and systematically investigated their structure–activity relationships. The optimized catalyst (Fe/Cu = 0.5) exhibited superior performance at 320 °C and 4 MPa, achieving a CO2 conversion of 41.1%, with ethanol selectivity and space-time yield (STY) reaching 28.91% and 175.91 mg·gcat–1·h–1, respectively. Mechanistic studies revealed that the intrinsic hydrophobicity of MWCNT facilitated water desorption to preserve the active Fe5C2 phase. Synergistically, Cu promoted Fe reduction via hydrogen spillover, while K inhibited excessive hydrogenation, facilitating the C–C coupling of RWGS-derived CHxO* and CHx* intermediates at the interface. This study highlighted the importance of hydrophobic surface engineering, providing a strategy for designing catalysts for CO2 hydrogenation to ethanol.
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF SOLUTION CHEMISTRY
·
2025
·
IF 1.3
Cai Weibin,Meng Hui,Zhou Qibo,Zeng Minzhi,Gai Hengjun
This study experimentally measured the liquid–liquid equilibrium (LLE) data for the cyclohexanol + phenol + water system at three specific temperatures (298.15 K, 308.15 K, and 318.15 K) under standard atmospheric conditions, and these data were subsequently utilized to compute the distribution coefficients ( D ) and separation factors ( S ), which served as critical indicators for evaluating cyclohexanol's performance in extracting phenol. Quantitative analysis indicates that for systems with phenol concentrations above 0.0015, cyclohexanol is not only a significantly better extractant than cyclohexanone, but also has stronger temperature adaptability. Additionally, the non-random two liquid model and the universal quasi-chemical model were employed for correlation analysis of the experimental data, yielding binary interaction parameters and root-mean-square deviation (RMSD) values, with the RMSD consistently remaining below 0.32 across all tested temperatures, thereby validating the strong agreement between the model predictions and the experimental data.
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DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Qing Xu,Guojie Wu,Jiamin Deng,Xi Ke,Zhicong Shi,Liying Liu
Large K + ions act as structural pillars to enhance crystal stability. • Mg doping introduces additional vacancies to accelerate Na + diffusion. • K Mg co-doping significantly enhances rate performance and cycling stability at 4.5 V. The polyanionic compound Na 3 V 2 (PO 4 ) 2 F 3 (NVPF) cathode material has attracted extensive attention due to its high theoretical specific capacity (128 mAh g −1 ) and energy density (500 Wh kg −1 ). The primary bottleneck for NVPF is the low intrinsic electronic conductivity, which results in poor long cycling and rate performance. A K Mg co-doped Na 2.92 K 0.08 V 1.95 Mg 0.05 (PO 4 ) 2 F 3 (NKVMPF) cathode material is designed in this work to address the above problem. K Mg co-doping improves the Na + diffusion kinetics and crystal structure stability of NVPF due to the increased lattice volume, introduced additional vacancies, and the pillar supporting role of K + with larger radius. At a potential window of 2.0 V–4.5 V, the NKVMPF delivers superior rate performance and long-term cycle ability compared to NVPF, with a specific discharge capacity of 66.9 mAh g −1 at the high current rate of 20C and a capacity retention of 81.1% after 250 cycles at 0.2C. This work provides a binary doping strategy suitable for polyanion cathode materials and offers a new perspective for the development of high-performance cathode materials for sodium-ion batteries (SIBs).
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2025
·
IF 2.1
Linlin Sun,Guodong Su,Zhenghui Li,Renjie Xu
The equilibrium mole fraction solubility of tanshinone I in acetone, N,N-dimethylformamide (DMF), methanol, ethanol, water, ethylene glycol (EG), n-propanol, isopropanol, and 1-butanol as well as methanol/ethanol/DMF/acetone + water was determined by the isothermal saturation method at 278.15–323.15 K under 101.2 kPa. The temperature and the composition of solvent mixtures play a decisive role in the solubility of tanshinone I. Then, four monosolvent models (Apelblat, van’t Hoff, λh, and NRTL) and three cosolvency models (Jouyban–Acree (J-A), van’t Hoff–Jouyban–Acree (V-J-A), and modified Apelblat–Jouyban–Acree (A-J-A)) were utilized to correlate the mole fraction of tanshinone I. The maximum deviation (relative average deviation (RAD) and root-mean-square deviation (RMSD)) between the experimental data and the solubility data calculated by the monosolvent models are 6.21% and 3.02 × 10–4, respectively. The maximum of RAD and RMSD for the mixture systems are 1.58% and 1.35 × 10–4, respectively. The Kamlet and Taft linear solvation energy relationship model was used to analyze the solvent effect, and the nonspecific dipolarity/polarizability interactions between the solute and solvent played a major promoting role. All in all, the experimental and computational data are able to provide basic data for the optimization and improvement of the recrystallization process of tanshinone I.
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Xin Xu,Fengxing Jiang,Xiaofang Liu,Cheng Liu,Congcong Liu,Qinglin Jiang,Haixin Ding,Jingkun Xu,Peipei Liu
The development of freestanding electrodes with high energy density remains a key challenge for potassium-ion supercapacitors. Herein, a supramolecular strategy is presented through the in situ electropolymerization of dibenzo-18-crown-6 (DB18C6) on single-walled carbon nanotubes (SWCNTs) films, fabricating the flexible poly(DB18C6) (PDB18C6)/SWCNTs hybrid electrodes. This design leverages dual charge-storage mechanisms: a conductive SWCNTs network for rapid electron transport and embedded PDB18C6 macrocycles for reversible K + coordination via host-guest interactions, which significantly enhances pseudocapacitance and cycling stability of the prepared film. By optimizing the electropolymerization time, the freestanding electrode achieves a high energy density of 77 Wh kg -1 at a power density of 1595 W kg -1 within an expansive operating window of -1.5 to 1.5 V. Notably, a high capacitance retention of 99.25% is maintained after 15,000 cycles at 10 A g -1 , attributable to the robust K + -crown ether coordination effect. Furthermore, a symmetrical supercapacitor assembled with PDB18C6/SWCNTs electrodes delivers an energy density of 18.75 Wh kg -1 at 1350 W kg -1 . This work underscores the promise of supramolecular coordination chemistry for designing high-performance energy storage devices.
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2024
·Vol. 11
·期 6
·1754-1763
·
IF 6.1
Qingqing Huang,Liyun Cao,Yuhang Wang,Jiayin Li,Yiting Wang,Shiyin Wei,Shuzhuo Bai,Koji Kajiyoshi,Yijun Liu,Zhenjiang Li,Jianfeng Huang
Tungsten disulfide (WS2) presents a layered structure with a high theoretical capacity (433 mA h g−1) in potassium-ion batteries, making it a promising anode material. However, its kinetics is poor with limited practical capacity and it is still a challenge to design new structures to improve its kinetics. In this work, a hollow Cu9S5/C/WS2 composite structure is designed. It is used as an anode in potassium-ion batteries (PIBs) with a high reversible capacity (406 mA h g−1 after 150 cycles at 200 mA g−1) and excellent rate performance (246 mA h g−1 at 20 A g−1). These results are attributed to its unique hollow composite structure, where the WS2 sheets are pinned on hollow cubic carbon by Cu9S5 nanowires. On one hand, the introduction of Cu9S5 nanowires expands the layer spacing of WS2 and forms a K+ fast diffusion channel. On the other hand, hollow carbon and Cu9S5 nanowires form a fast electron transmission path, which improves the charge transport rate. Additionally, the use of hollow carbon and Cu9S5 nanowires as a framework enhances structural stability. The synergistic effect of these aspects finally realizes fast and stable K+ storage. This work provides a new insight into the design of high-performance potassium storage devices using layered metal sulfides.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
MEASUREMENT
·
2024
·
IF 5.2
Ya’nan Wang,Bangkun Yue,Xiaofang Li,Fei Wang,Weijun Huang,Yongchang Zhang,Xinxin Jin,Feng Liu,Yanmin Duan,Haiyong Zhu,Zhihong Li
Potassium ions ( K + ) transmembrane transport is essential for regulating various physiological processes . Herein, a label-free tilted fiber Bragg grating (TFBG)-assisted plasmonic sensor was proposed and experimentally demonstrated for measuring K + transmembrane movement in situ and continuously. The sensor was coated with valinomycin-modified vesicular liposome , providing an exceptional capability for selectively capturing and transporting K + through the liposome’s bilayer membrane . A differential demodulation method was proposed, by which great advancements were achieved in unveiling K + transmembrane process showing three stages in real time. In particular, not only does the sensor sensitively detect low K + level (detection limit down to 8.5 pM) but also successively decouple bulk and surface effects involved in transmembrane dynamics, along with additional advantage of resistance to temperature and light power fluctuations. These advancements represent great progress in revealing K + transmembrane movement and highlight the potential for monitoring transmembrane-related cellular signaling pathways like cell proliferation and apoptosis.
研究领域:
生物物理学
·
分析化学
·
医学工程
✓ 已验证
DOI
高影响因子
TECHNOLOGY IN CANCER RESEARCH & TREATMENT
·
2021
·
IF 3.399
Yayan Yang,Qian Feng,Chuanfeng Ding,Wei Kang,Xiufeng Xiao,Yongsheng Yu,Qian Zhou
Although Epirubicin (EPI) is a commonly used anthracycline for the treatment of breast cancer in clinic, the serious side effects limit its long-term administration including myelosuppression and cardiomyopathy. Nanomedicines have been widely utilized as drug delivery vehicles to achieve precise targeting of breast cancer cells. Herein, we prepared a DSPE-PEG nanocarrier conjugated a peptide, which targeted the breast cancer overexpression protein Na+/K+ ATPase α1 (NKA-α1). The nanocarrier encapsulated the EPI and grafted with the NKA-α1 targeting peptide through the click reaction between maleimide and thiol groups. The EPI was slowly released from the nanocarrier after entering the breast cancer cells with the guidance of the targeting NKA-α1 peptide. The precise and controllable delivery and release of the EPI into the breast cancer cells dramatically inhibited the cells proliferation and migration in vitro and suppressed the tumor volume in vivo. These results demonstrate significant prospects for this nanocarrier as a promising platform for numerous chemotherapy drugs.
研究领域:
药学
·
癌症研究
·
纳米技术
·
药物递送系统
✓ 已验证
DOI
PubMed
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 8
·1932
·
IF 5.076
Leqiang Wu,Hengjia Shao,Chen Yang,Xiangmin Feng,Linxuan Han,Yanli Zhou,Wei Du,Xueqin Sun,Zhijun Xu,Xiaoyu Zhang,Fuyi Jiang,Caifu Dong
To date, the fabrication of advanced anode materials that can accommodate both Na+and K+storage is still very challenging. Herein, we developed a facile solvothermal and subsequent annealing process to synthesize SnS2/RGO composite, in which SnS2nanosheets are bonded on RGO, and investigated their potential as anodes for Na+and K+storage. When used as an anode in SIBs, the as-prepared SnS2/RGO displays preeminent performance (581 mAh g−1at 0.5 A g−1after 80 cycles), which is a significant improvement compared with pure SnS2. More encouragingly, SnS2/RGO also exhibits good cycling stability (130 mAh g−1at 0.3 A g−1after 300 cycles) and excellent rate capability (520.8 mAh g−1at 0.05 A g−1and 281.4 mAh g−1at 0.5 A g−1) when used as anode for PIBs. The well-engineered structure not only guarantees the fast electrode reaction kinetics, but also ensures superior pseudocapacitance contribution during repeated cycles, which has been proved by kinetic analysis.
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DOI
高影响因子
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