CRYSTENGCOMM
·
2018
·Vol. 20
·期 26
·3657-3665
·
IF 3.304
G. Q. Wang,L. Y. Li,Y. N. Feng,H. Yu,X. H. Zheng
In this study, a novel dual-mode luminescence phosphor KBaLu(MoO4)3:Tb3+,Yb3+ has been synthesized by high-temperature solid-state reactions, and the crystal structures have been determined for the first time. Single-crystal X-ray diffraction data reveal that its space groups are C2/c. The crystalline structure is constituted by K/BaO8 distorted square antiprisms, distorted LuO8 polyhedra and two kinds of distorted MoO4 tetrahedra, which form chains lying along the c-axis. Spectroscopic properties and energy transfer mechanisms are investigated by detailed analyses of emission and excitation spectra and excited-state lifetimes. The KBaLu(MoO4)3:Tb3+,Yb3+ phosphor shows dominant green emissions in the visible region, which are due to 5D4 → 7F5 transition of Tb3+ under excitation light in ultraviolet region as well as a 980 nm laser, and the CIE coordinates are close to the Society of Motion Picture and Television Engineers (SMPTE) standard values for primary green (0.310, 0.595). With the increasing temperature, the luminescence of KBaLu(MoO4)3:Tb3+,Yb3+ phosphor decreases almost linearly with the CIE coordinate variation from (0.326, 0.616) to (0.327, 0.530), which results in photoluminescence color variation from primary green to yellowish-green. The present results demonstrate the successful synthesis of a dual-mode luminescence material KBaLu(MoO4)3:Tb3+,Yb3+ phosphor with both up- and down-conversion luminescence properties; moreover, it can be used as a potential spectrum converter in display lighting and anti-counterfeiting.
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高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 36
·18718-18726
·
IF 7.443
Gongzheng Yang,Huawei Song,Mingmei Wu,Chengxin Wang
Besides targeting low-voltage intercalation, NaTi2(PO4)3 (NTP) is a promising negative electrode material for non-aqueous sodium-ion batteries (SIBs). However, the low electronic conductivity of this material inhibits its potential applications. Herein, we report the controllable synthesis of four interesting porous NTP nanocubes via a one-pot solvothermal method. The as-synthesized products have shown excellent high-rate performance and cycling stability as SIB anodes. After 10 000 cycles at a 10C rate, 75.5% of the initial capacity is retained, which exceeds those of most of the reported SIB anode materials. Even at an extremely high rate of 100C, the NTP nanocubes can still deliver considerable reversible capacities after deep charging/discharging for 15 000 cycles. The superior electrochemical performances can be attributed to their unique nanostructures. We hope that such a finding of the new construction will enrich the NTP system and provide several possible candidates for SIB anodes.
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高影响因子
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Na Liu,Zhangxing He,Xubo Zhang,Yingqiao Jiang,Yuehua Li,Jing Zhu,Wei Meng,Lei Dai,Ling Wang
In this paper, Li 1−x Na x Ti 2 (PO 4 ) 3 @carbon (x=0.01, 0.03, and 0.05) composites as anode for aqueous lithium ion batteries were synthesized by in situ coating approach. The doping of Na on Li sites did not break the lattice structure of LiTi 2 (PO 4 ) 3 , while the lattice volume was increased by doping of Na. Among Na-doped LiTi 2 (PO 4 ) 3 @carbon composites, Li 0.97 Na 0.03 Ti 2 (PO 4 ) 3 @carbon (LC-Na-3) demonstrated the best electrochemical properties . Compared with the pristine LiTi 2 (PO 4 ) 3 @carbon (LC) composite, LC-Na-3 composite exhibited better rate and cycling performance. LC-Na-3 composite delivered the discharge capacity of 98.5 mAh g −1 at 0.2 C and 45.0 mAh g −1 at 15 C, 10.9 mAh g −1 and 32.1 mAh g −1 larger than that of LC composite, respectively. Moreover, the discharge capacity retention for LC-Na-3 composite achieved 90.4%, 6.9% higher than that for LC composite at the rate of 2 C after 300 cycles. The improved electrochemical properties of Na-doped LiTi 2 (PO 4 ) 3 @carbon composite was ascribed to the decrease of charge transfer resistance and the acceleration of diffusion of lithium ions , resulting from the widening of diffusion channel for lithium ions, which was verified by XRD measurements.
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高影响因子
Materials Today Energy
·
2025
·
IF 8.6
Xudong Wang,Lei Fu,Yun Huang,Jiepeng Chen,Jiapin Liu,Jie Xiao,Xinyan Xiang,Wenping Zeng,Siming Huang,Xing Li,Mingshan Wang,Bingshu Guo,Yuanhua Lin,Haijun Cao
Sodium super ion conductor (NASICON) structure materials such as Na 3 V 2 (PO 4 ) 3 (NVP) are suitable cathodes for Sodium-ion batteries (SIBs) due to their open three-dimensional structure that can provide fast Na + migration channels. However, low inherent conductivity and capacity restrict the application of NVP. In this paper, NASICON-structured Na 2.25 V 1.25 Ti 0.75 (PO 4 ) 3 @Y (NT 0.75 VP@Y) constructed by yeast with the biological template method is successfully synthesized. Theoretical calculations show that the spherical structure of bio-derived carbon formed after calcination produces a local compressive strain that leads to a uniform distribution of electronic states and stronger adsorption of Na + and NaClO 4 , thus enhancing the electronic and ionic conductivities of the material. NT 0.75 VP@Y exhibits a discharge specific capacity of 135 mAh g −1 at 0.2 C and a capacity retention rate of 94.8 % after 500 cycles. Finally, the full cell and the pouch cell are successfully assembled to verify the practicality of NT 0.75 VP@Y. This paper provides a simple, low-cost, and environmentally friendly way to synthesize high-performance cathode materials for SIBs.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 23
·1-13
·
IF 2.8
Xu Cheng,Liu Ke,Lu Yong,Xu Qi
Sodium-ion batteries (SIBs), as an emerging energy storage technology, have been recognized as one of the most promising alternatives to lithium-ion batteries (LIBs). Among various cathode materials, the NASICON-type Na 4 VMn(PO 4 ) 3 (NVMP) composite material has garnered considerable attention owing to its distinctive 3D framework structure, high redox potential, stable crystal structure, and rapid Na + diffusion rate. Nevertheless, the practical application of NVMP cathodes is constrained by several inherent limitations, including inherently low electronic conductivity, Mn 3+ Jahn–Teller distortion, and structural degradation mechanisms, which collectively contribute to compromised rate capability and limited cycling durability. To tackle this challenge, an N-doped dual nano-carbon coating was applied to the NVMP material to enhance the conductivity of the composite. Building upon this foundation, a series of Na 4 VMn 1- x Cr x (PO 4 ) 3 /NC@CNTs cathode materials (where x = 0, 0.25, 0.5, 0.75, and 1) were successfully prepared using the sol–gel method, enabling targeted regulation of Mn/Cr ratios for enhanced electrochemical performance. The N-doped dual nano-carbon coating is capable of forming carbon layer defects and active sites, as well as constructing a 3D conductive network structure, which can enhance the diffusion rate of Na + ions and shorten their transport path. The results indicate that the Na 4 VMn 0.5 Cr 0.5 (PO 4 ) 3 /NC@CNTs cathode material demonstrates the highest discharge capacity, achieving 132.1 mAh·g −1 when x = 0.5. Notably, the capacity decreases rapidly at high rates, potentially attributed to the collapse of the crystal structure and excessive polarization, resulting in a deterioration of the material’s electrochemical performance. The optimized Na 4 VCr(PO 4 ) 3 /NC@CNTs (when x = 1) demonstrates exceptional rate performance with 91.2% capacity retention at 1C, accompanied by significantly reduced charge transfer resistance (Rct = 331.9 Ω). This study establishes a design paradigm for NASICON-type cathode materials through dual-transition metal synergistic doping and demonstrates the efficacy of Cr/Mn co-substitution in balancing ionic/electronic conductivity for next-generation high-power sodium-ion batteries.
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高影响因子
CHEMISTRY & BIODIVERSITY
·
2024
·
IF 2.3
Yongchang Bi,Jingjun Wang,Xingyu Bian,Mingyue Chen,Guangyuan Zhu,Yumin Zhang,Qiang Gu
An efficient and green method for synthesizing 3-methyl-4-(hetero) arylmethylene isoxazole-5(4 H )-ones was developed using a recyclable and environmental–friendly catalyst, Na 2 S 2 O 3 , and 16 target compounds were successfully synthesized under the obtained optimal reaction condition. Using rifampicin as a positive control, the antibacterial activity of all synthesized compounds was tested by micro dilution method, among them, 3-methyl-4-[(2,4-dimethoxyphenyl) methylene]-isoxazole-5-one ( 4 m ) presented wonderful antimicrobial activity, which may contribute to the development of anti-tuberculosis drugs. Graphical
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PubMed
高影响因子
APPLIED THERMAL ENGINEERING
·
2024
·
IF 6.1
Zhao-ran Li,Gao-ning Liang,Yu-dong Ding,Qiang Liao,Xun Zhu,Min Cheng
As an important intermediary between the green energy and human society, the lithium-ion battery has promising prospects in the new energy vehicles, energy storage, and green development fields. However, lithium-ion batteries can generate a large amount of heat during operation. In addition, excess temperature or big temperature difference of the surface of the lithium-ion battery can reduce its performance, which also results in reducing its operational life and even triggers incidents such as fires and explosions. Therefore, studying efficient thermal management methods for lithium-ion batteries is crucial for increasing their application range. This paper proposes a novel thermal management method by combining 3-D finned tubes with PCM. The thermal management system maintains a battery operating temperature less than 45 °C and a maximum temperature difference less than 2.4 °C. The influence of different fin structure parameters on the melting dynamics of PCM and the heat transfer performance is then discussed. The obtained results show that under each solid–liquid ratio of PCM, the heat transfer performance increases with the increases of the fin height, while it initially decreases and then increases with the increase of the width and axial spacing. Moreover, the heat transfer performance of the 3-D finned tube with different PCM liquid–solid ratios is investigated. The obtained results demonstrate that for constant fin parameters, the heat transfer reaches its highest performance for a PCM liquid–solid ratio greater than 2:2. The findings of this study lay a foundation for the design of efficient thermal management systems incorporating PCM applications.
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高影响因子
ORGANIC PROCESS RESEARCH & DEVELOPMENT
·
2024
·
IF 3.1
Chuanjun Wu,Heng Guo,Jiawei Tang,Lintao Xia,Jianfen Shao,Yongfu He,Fei Chen,Peng Peng,Yuewen Han,Chuanmeng Zhao,Fuli Zhang,Shaoxin Chen
In the present study, a practical chemoenzymatic method was developed for the synthesis of chiral phenylalanine derivative 1, which is the key intermediate of Lifitegrast. In this established process, a simple and effective Zn/HCl reduction system was employed to obtain N-acetyl-3-bromo-phenylalanine 6, which served as the substrate for the subsequent enzymatic resolution process. Then, the key chiral intermediate, 3-bromo-l-phenylalanine 7, could be obtained using acylase (ACY) AmACY. Upon process optimization, the chemical reaction was executed at a 300 g scale, with a notable substrate concentration reaching up to 100 g/L. The process achieved a yield of 40%, compared to a maximum theoretical yield of 50%, and exhibited an enantiomeric excess (ee) value reaching up to 99.9%. A simple and effective Zn/HCl reduction system was employed to obtain N-acetyl-3-bromo-phenylalanine 6, which served as the substrate for the subsequent enzymatic resolution process. This synthetic pathway was effectively executed, yielding 1·HCl with a purity of 99.7% and an ee value of 99.9%, culminating in an overall yield of 23.4%. Additionally, the undesired (D)-6 enantiomer was recycled to form (rac)-6, employing an acetanhydride/acetic acid (Ac2O/AcOH) system. This recycling process achieved a yield of 47.5%, relative to a maximum theoretical yield of 50%, and a purity level of 99.8%.
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高影响因子
MOLECULES
·
2020
·Vol. 25
·期 9
·2149
·
IF 3.267
Xu Yu,Fei Ma,Liangxiao Zhang,Peiwu Li
Rapeseed (Brassica napus L.) is rich in phenols, vitamins, carotenoids, and mineral elements, such as selenium. Additionally, it contains the active ingredients sulforaphane and indole-3-carbinol, which have been demonstrated to have pharmacological effects. In this study, sulforaphane and indole-3-carbinol were extracted and quantified from rapeseeds using quick, easy, cheap, effective, rugged and safe (QuEChERS) method coupled with ultra high performance liquid chromarography tandem mass spectrometry (UHPLC-MS/MS). The major parameters for extraction and purification efficiency were optimized, including the hydrolysis reaction, extraction condition and type and amount of purification adsorbents. The limit of detection (LOD) and the limit of quantification (LOQ) for sulforaphane were 0.05 μg/kg and 0.15 μg/kg, and for indole-3-carbinol were 5 μg/kg and 15 μg/kg, respectively. The developed method was used to successfully analyze fifty rapeseed samples. The QuEChERS coupled with UHPLC-MS/MS simultaneously detect sulforaphane and indole-3-carbinol in vegetable matrix and evaluate the quality and nutrition of rapeseed samples.Keywords:sulforaphane;indole-3-carbinol;QuEChERS;quantification;UHPLC-MS/MS
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高影响因子
Nanoscale
·
2019
·Vol. 11
·期 47
·22890-22898
·
IF 6.97
Zihua Wu,Yuling Liang,Linqi Cao,Qing Guo,Suju Jiang,Fangfang Mao,Jiarong Sheng,Qi Xiao
Facile synthesis of high quality gold nanorods (AuNRs) with a tunable size is of great value for applications of AuNRs in various fields and for the study of the growth mechanism of such anisotropic nanostructures. However, limitations usually exist in a specific synthetic protocol. In this work, using 3-aminophenol as the reducing agent, we present a AuNR synthetic strategy with an excellent comprehensive performance, which includes an exceptional monodispersity, a AuNR shape purity of around 99%, a conversion ratio of the gold precursor of about 91%, and an easily tuned longitudinal surface plasmon resonance wavelength ranging from 580 to ∼1050 nm. Studies on the impacts of the experimental parameters including silver ions, gold seeds, reducing agent, and cetyltrimethylammonium bromide (CTAB) revealed a profound recognition of the significant effect of the reductive atmosphere, in synergy with other parameters, in directing the growth and structural evolution of the gold seeds, thus deeply affecting the size, shape yield, monodispersity, and morphology of the final structure. These results could be immensely useful for the application and revelation of the growth mechanism of AuNRs.
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PubMed
高影响因子
Journal of Functional Foods
·
2022
·
IF 5.223
Xiang Li,Yunhui Zhang,Congying Zhao,Bowei Zhang,Bo Peng,Yan Zhang,Jin Wang,Shuo Wang
Bisphenol A (BPA), a plasticizer, is widely believed to cause metabolic disorders. However, an effective intervention is still absent. This study investigated the beneficial effects of Epigallocatechin-3-gallate (EGCG) on insulin resistance and microbial disturbance induced by BPA. The serum glucose, insulin, total triglyceride, and total cholesterol were decreased in BPA-treated mice after the intervention of EGCG. The sensitivity of insulin signals in peripheral tissue was improved by modulating the phosphorylation of IRS-1, Akt, and GSK-3β. In addition, 16S rRNA analysis for fecal microbiota showed the relative abundance of Ruminiclostridium , Blautia , unidentified_Ruminococcaceae , and Candidatus_Saccharimonas were restored by the high dose of EGCG. Furthermore, EGCG increased the concentrations of fecal short-chain fatty acids and protected the gut barrier impaired by BPA. Overall, our results demonstrated the positive effects of EGCG on BPA-induced insulin resistance and gut microbial dysbiosis. The current study provides a potential treatment for the chronic metabolic toxicity of BPA.
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高影响因子
Analytical Methods
·
2021
·Vol. 13
·期 14
·1757-1765
·
IF 2.896
Can Zhang,Xiaoxiao Wu,Dongyang Li,Jinnuo Hu,Debin Wan,Zhen Zhang,Bruce D. Hammock
As a major metabolite of pyrethroid pesticides, 3-phenoxybenzoic acid (3-PBA) can be an indicator of health risk and human exposure assessment. Based on nanobodies (Nbs), we have developed a rapid flow-through dot enzyme linked immunosorbent assay (dot ELISA) and gold nanoparticle (GNP) lateral-flow immunoassay for detecting 3-PBA. The limit of detection (LOD) values for detecting 3-PBA by flow-through dot ELISA and GNP lateral-flow immunoassay were 0.01 ng mL−1 and 0.1 ng mL−1, respectively. The samples (urine and lake water) with and without 3-PBA were detected by both nanobody-based flow-through dot ELISA and GNP lateral-flow immunoassay, as well as liquid chromatography-mass spectrometry (LC-MS) for validation. There was good consistency between the results of the immunoassays. This demonstrated that the two developed nanobody-based immunoassays are suitable for rapid detection of 3-PBA.
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高影响因子
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