JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Rui Ling,Bingqiang Cao,Wentao Qi,Chao Yang,Kaier Shen,Zhiyuan Sang,Jinze Guo,Dongli Xie,Shu Cai,Xiaohong Sun
Na 3 V 2 (PO 4 ) 3 (NVP) with a unique 3D open NASICON framework is regarded as an attractive electrode material in sodium-ion batteries (SIBs) due to its wide range of Na + accommodations. Nevertheless, the practical implementation of NVP is hampered by the unsatisfying capabilities and cycling stability at high rates of charging/discharging, which attribute to low electron/ion conductivities. Herein, a novel NVP@carbon/N-doped graphene aerogel (NVP@C/N-GA) is designed via a facile precursor infiltration followed by the post-heating treatment process. In this delicate design, the 3D porous and interconnected framework endows with bicontinuous ion/electron transport pathways for the rapid electrochemical reaction ; while the carbon layer combined with N doped graphene aerogel (N-GA) provides long-range conductive networks throughout the whole electrode and ensure the cycling stability. Consequently, the NVP@C/N-GA electrode is shown to achieve unprecedented rate capabilities and outstanding ultralong cycling stability as cathode (74.1 mA h g −1 at 100 C; 84% capacity retention at 20 C after 12,000 cycles) and anode (109.3 mA h g −1 at 20 C; 87% capacity retention at 20 C after 5000 cycles), both of them outperforms the majority of previously reported literature. Moreover, the symmetric full cell assembled by NVP@C/N-GA also demonstrates admirable electrochemical properties . Thus, this work may provide new avenues for constructing electrodes with high rate capability and ultralong-life.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
·
2016
·
IF 0.62
Zheng-Bai Zhao,Hai-Jiao Xie,Yan-Li Li,Yong Jiang
In this article, the multicomponent hydrogel was prepared by the copolymerization of the hydrophobic silicon-containing monomer tris(trimethylsiloxy)-3-methacryloxypropyl-sliane (TRIS) with the hydrophilic monomers 2-hydroxyethyl methacrylate (HEMA) and N-vinyl pyrrolidone (NVP). The ethanol extraction experiments as well as the FTIR, DSC results showed that the copolymerization was effective. The silicone hydrogel that had hydrophilic and hydrophobic phases could be loaded with hydrophilic drug (FITC) and hydrophobic drug (Nile Red) simultaneously. The drug release properties of the hydrogel were studied by taking advantage of its innate stimuli-responsiveness to solvent and pH. The release behaviors of hydrophilic and hydrophobic drugs were found to be solvent dependent. And the release behavior of hydrophilic drug was also pH sensitive. With the characteristics above, the silicone hydrogels can be good candidates for specified materials and may have broad applications in responsiveness, drug release, contact lens, etc.
研究领域:
材料科学
·
药学
·
生物医学工程
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 3
·1-13
·
IF 2.8
Li Caixia,Lu Peng,Ma Xiaoxuan,Zhang Kun,Li Chenglong
The rapid advancement of wearable electronic devices demands high-performance sodium-ion battery (SIB) cathode materials, particularly in terms of stability and electrochemical performance. Sodium super ionic conductor (NASICON)-type Na 3 V 2 (PO 4 ) 3 (NVP) has attracted significant attention due to its unique framework structure and high theoretical capacity. However, the inherently low electrical conductivity of NVP limits large-scale application. To address this issue, a novel NVP@C-rGO composite was synthesized using metal–organic frameworks (MOF) and reduced graphene oxide (rGO). The structures of these two forms of carbon enhance the charge transfer kinetics of NVP and provide two stress-buffering layers, thereby improving the structural stability of the material while significantly facilitating charge transport. Electrochemical testing confirmed the effectiveness of this strategy: at a current density of 500 mA g⁻ 1 , the NVP@C-rGO composite retained 71.1% of capacity after 600 cycles, compared to only 21.2% for unmodified NVP. Furthermore, due to the synergistic effect between rGO and MOF-derived NVP, the composite achieved a high specific capacity of 89.9 mAh g⁻ 1 under the same conditions, while NVP reached only 62.7 mAh g⁻ 1 . This significant improvement in performance, combined with the exceptional cycling stability and rate capability of the NVP@C-rGO||HC-rGO full cell, highlights the potential of the composite as a next-generation energy storage material for flexible and wearable electronic devices.
研究领域:
材料科学
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能源存储技术
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DOI
高影响因子
Materials Today Energy
·
2022
·
IF 9.257
Can Luo,Ruyun Qiu,Gen Li,Xiaojun Shi,Zhifei Mao,Rui Wang,Jun Jin,Beibei He,Yansheng Gong,Huanwen Wang
Sodium-ion hybrid capacitors (SIHCs) are promising technology for energy storage because they combine the merits of high-energy batteries and high-power capacitors as well as naturally abundant sodium resource. However, conventional SIHCs consume a mass of electrolyte during the charge process, thus generating some side reactions at high potentials. In this work, we report a novel rocking-chair SIHC using Na 3 V 2 (PO 4 ) 3 /carbon composite nanofibers (denoted as “NVP@CNF”) as binder-free cathodes and SiO 2 -templated hollow carbon nanofibers (HCNF) as the capacitive anode. Resulting from the unique carbon-encapsulation configuration, the NVP@CNF cathode demonstrates excellent rate capability (105.8 mAh/g at 0.5C; 66.9 mAh/g at 100C) and long-term cycling stability (98% capacity retention after 2000 cycles) in sodium half-cells. The as-fabricated HCNF||NVP@CNF SIHC device delivers a high energy density of 216.4 Wh/kg at a power density of 381.8 W/kg. Even at an increased power density of 15272.7 W/kg, the energy density is still as high as 123.0 Wh/kg (based on the total mass of active materials in both electrodes). These results provide a new route to design various flexible self-supporting composite fiber electrodes through a simple electrospinning encapsulation strategy, which finally pushes the development of next-generation hybrid energy storage devices.
研究领域:
材料科学
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能源存储技术
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产品关联
DOI
高影响因子
IRANIAN POLYMER JOURNAL
·
2019
·Vol. 28
·期 11
·957-967
·
IF 1.707
Yang Xiaoli,Wang Kunyan,Yan Lei,Yu QiNing,Xia Hongxia,Liu Yanbo,Yan Chengjun
Multi-stimuli-responsive hydrogels are being increasingly studied due to their sensitive response to small stimuli and wide applications in biosensors and drug delivery. In this study, a multi-stimuli-responsive hydrogel, poly(hydroxyethyl methacrylate- co - N -vinyl pyrrolidone- co -methacrylic acid- co - N -isopropylacryl amide) [poly(HEMA- co -NVP- co -MAA- co -NIPA)], was synthesized by radical polymerization and characterized by Fourier transform infrared (FTIR) and 13 C NMR spectroscopy techniques. With the aids of scanning electron microscopy (SEM) characterization, it was confirmed that the sensitive stimuli-responsive behavior of the hydrogel stemmed from its microstructure variation with those external stimulus. Rheological study showed that the hydrogel had rheological feature of typical elastomer. Compression tests revealed that the poly(hydroxyethyl methacrylate- co - N -vinyl pyrrolidone) [poly(HEMA- co -NVP)] played an important role in enhancing the compressive modulus of such hydrogel. More interestingly, the equilibrium swelling ratio (ESR) studies further confirmed that the composite hydrogel displayed response sensitively to the stimulus of temperature, pH, and ionic strength. Herein, theophylline as a drug model was adopted due to the multi-stimulus properties of hydrogels, which were a potential candidate for drug loading and delivering. Releasing drug continuously in a given period was dependent on the characteristics of solution and loading time. The mechanisms for drug release from the hydrogels were studied by Ritger–Peppas model.
研究领域:
材料科学
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生物医学工程
·
药剂学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Jiaxi Wen,Kehan Zhang,Yujun Liu,Zhifeng Du,Chaomei Xiong,Hongliang Jiang
Estrogens and their analogues can cause harm to human health through the food chain. Ten estrogens in different milk samples were directly extracted by amphiphilic divinylbenzene/ N -vinyl-2-pyrrolidone (DVB/NVP)-Fe 3 O 4 @SiO 2 -based magnetic solid-phase extraction (MSPE) followed by pre-column derivatization and ultra-high performance liquid chromatography tandem mass-spectrometry (UHPLC-MS/MS) detection. Under the optimal conditions, the limits of detection for ten analytes were in the range of 0.05–0.38 ng mL −1 in whole liquid milk matrix and 0.04–3.00 ng g −1 in milk powder matrix. The intra-/inter-day accuracy ranged in 83.4–113.8%, with RSDs in 2.5–15.0%. A total of 15 brands of liquid milk and milk powder samples were analyzed, and only estradiol was detected in three brands of boxed liquid milk within safe range. The proposed sample pretreatment eliminated the common protein precipitation process, improved the sample throughput, and has the potential for routine testing of estrogens and their analogues in market-sale milk samples.
研究领域:
分析化学
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食品安全
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Analytical Methods
·
2026
·Vol. 19
·期 1
·60
·
IF 3
Hussain Aisha,Wu Jiapeng,Wen Jiaxi,Xiong Chaomei
Sudan dyes, a class of azo dyes, are genotoxic and carcinogenic to humans. However, they are still used illegally to color food products and spices due to their color fastness. In this study, multi-functionalized magnetic silica nanoparticles (C 18 /DVB/NVP(4:1)-Fe 3 O 4 @SiO 2 MNPs) were synthesized, and solid–liquid extraction (SLE) coupled with magnetic solid phase extraction (MSPE) was employed for the extraction and preconcentration of five Sudan dyes (Sudan I − IV, Sudan Red 7B), followed by high-performance liquid chromatography/ultraviolet spectroscopy (HPLC–UV) for their detection in powdered chili pepper samples. The SLE conditions for the analytes in powdered chili pepper samples were optimized. Under optimal conditions, the extraction recovery ranged between 78.0% and 106.9%. We investigated and optimized the potential factors that may affect the efficiency of MSPE. Under these optimal conditions, calibration curves showed good linearity ( R 2 > 0.9989) across the tested concentration range of 0.98 to 125 µg/g. The limits of detection for the five Sudan dyes were in the range of 0.06–0.26 µg/g. The intra-day and inter-day accuracy ranged from 93.5% to 106.3% with a relative standard deviation (RSD) of not more than 9.1%. The developed method was successfully applied to analyze ten different commercial brands of powdered chili pepper samples purchased from markets in Wuhan, confirming its feasibility for routine analysis of illegal Sudan dyes in these samples.
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Kaidi Gao,Qiao Hu,Yu Xia,Guangming Han,Jianfeng Yao
NASICON-type Na 3 V 2 (PO 4 ) 3 (NVP) has been identified as an ideal cathode for sodium-ion batteries (SIBs) because of its ultra-fast Na + diffusion and very stable structure. However, it still suffers from significant problems such as a low operating voltage plateau (3.4 V, vs. Na + /Na), inferior electronic conductivity and unsatisfactory energy density (370 Wh kg −1 ), thereby hampering the commercialization of NVP. Herein, a series of Al 3+ /Ga 3+ co-doping Na 3 V 2 (PO 4 ) 3 cathodes were successfully prepared through a facile solid-state reaction process. The substitution of Al 3+ /Ga 3+ for V 3+ in Na 3 V 2–2x Al x Ga x (PO 4 ) 3 ( x = 0, 0.1 and 0.2) effectively activates the electrons outside of V and achieves an extra redox couple V 4+ /V 5+ for high-voltage (3.9 V, vs. Na + /Na) reactions. Moreover, the presence of Ga in this series of electrode materials increases the proportion of sp 2 -type carbon. The optimized Na 3 V 1.8 Al 0.1 Ga 0.1 (PO 4 ) 3 material possesses high ionic/electronic conductivity and superior electrochemical performance: the energy density is enhanced by approximately 13.1 % at 0.1 C (from 345.4 Wh kg −1 for NVP to 390.7 Wh kg −1 for Na 3 V 1.8 Al 0.1 Ga 0.1 (PO 4 ) 3 ), and the power density is increased by approximately 135 % at 30 C (from 2574 W kg −1 for NVP to 6039 W kg −1 for Na 3 V 1.8 Al 0.1 Ga 0.1 (PO 4 ) 3 ). Furthermore, Na 3 V 1.8 Al 0.1 Ga 0.1 (PO 4 ) 3 exhibits excellent cycling stability with 93.4 % capacity retention after 350 cycles at 1 C. Ex-situ XPS and electrochemistry investigations imply the high reversibility of the V 3+ /V 4+ /V 5+ redox reaction in Na 3 V 1.8 Al 0.1 Ga 0.1 (PO 4 ) 3 . This work proposes a novel strategy to modulate the electronic structure of NVP by co-doping with Al 3+ and Ga 3+ to achieve reversible multi-redox activity (V 3+ /V 4+ /V 5+ ) in NASICON-type NVP, thus providing a viable approach for advancing ultrafast high-energy sodium storage.
研究领域:
材料科学
·
电化学
·
储能技术
·
固态化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Weizhi Liu,Yongqiang Guo,Zhiwei Xue,Hao Sun,Xiaofeng Lin,Chao Liu
Polyvinylidene fluoride (PVDF) membrane is a cheap and commonly used separation material, but its inherent hydrophobicity results in significant membrane contamination, which limits its engineering application and further development. The hydrophilic PVDF-g/co-NVP membrane was prepared through low-dose γ-ray irradiation and using N-vinyl-2-pyrrolidinone (NVP) as a modifier in this study. The effects of γ-ray dose and incorporating NVP additive on the microstructure, hydrophilicity, anti-fouling capability, and mechanical capacity of membranes were discussed. Molecular dynamics (MD) simulation method was used to comprehensively investigate the impact of the NVP on the physicochemical characteristics of membrane structure. Under a specific NVP load, the water contact angle of the membrane decreases from 87.92° to 52.66°. The pure water permeance reaches 362.1 L/m 2 h, and the porosity increases to 55.21 %±1.29 %, which indicates that γ-ray irradiation with NVP addition can effectively adjust the pore structure and hydrophilicity of the membrane. During anti-fouling test against bovine serum albumin (BSA), the modified membrane exhibits remarkable anti-fouling characteristics, including reduced BSA accumulation, enhanced flux recovery, lower irreversible contamination level, and extended cleaning cycle compared with the original pure PVDF membrane because of its higher hydrophilicity and positive zeta-potential value. This study elucidates the mechanism underlying γ-ray graft modification of PVDF membranes, thereby providing valuable insights into the development of efficient functional membrane materials.
研究领域:
材料科学
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环境工程
·
化学工程
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2020
·
IF 4.419
Hang Zhang,Miaomiao Hu,Yang Xu,Xiujian Xia,Chi Zhang,Yongjin Yu,Yakai Feng,Jintang Guo
Aberrant thickening of cement slurry caused by polycarboxylate retarders mainly refers to abnormal gelation and thickening time reversal (TTR) when temperature reaches above 120 °C. These phenomena would directly jeopardize cementing operation and hinder the application of polycarboxylate retarders in oil and gas exploitation. Herein, two functionalized polycarboxylate retarders were synthesized to overcome the challenges in complex conditions. The incorporation of isoprenyl oxy poly(ethyleneglycol) ether (TPEG) and [3-(methacryloylamino) propyl] trimethyl ammonium chloride (MAPTAC) was capable of preventing unfavorable “crosslinking and chelation” reaction between cement grains and polymer, thereby avoiding abnormal gelation. It was also found that the hydrophobic association behavior of long side chain in TPEG could cause the gradual release of carboxyl groups at elevated temperature, which was unfavorable for TTR inhibition. When the TPEG was replaced by N-Vinyl-2-Pyrrolidinone (NVP), its retarding effect gradually weakened when temperature rose from 130 °C to 150 °C, and excellent inhibition of TTR was achieved.
研究领域:
石油工程
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Yiran Jia,Yinuo Yang,Hongyu Zhang
Surface modification of lubricating coatings on biomedical devices is a pivotal strategy to improve the overall performance and clinical efficacy, significantly reducing friction between devices and human tissues and mitigating tissue damage during intervention and long-term implantation. Recently, various hydrophilic polymeric materials have been used for achieving surface functionalization, endowing the biomedical device with excellent superlubrication performance. N-Vinylpyrrolidone (NVP) and 2-methacryloyloxyethyl phosphorylcholine (MPC) are two typical representatives of nonionic and zwitterionic materials. However, there is still a research gap in a comparative study of the lubrication mechanisms and properties between them. In this study, a bioinspired and dopamine-assisted codeposition technique was used to fabricate biomimetic hydrophilic coatings, including P(DMA-NVP) and P(DMA-MPC), on polyurethane. To achieve a thorough comparative analysis of the self-adhesive coating performance, 3 M ratios of the copolymers were synthesized and comprehensive material evaluations were conducted. Additionally, surface morphology, hydrophilicity, and lubrication at both the microscale and macroscale were performed. It was found that both hydrophilic coatings exhibited good stability. The P(DMA-MPC) coating, due to the ability to attract and bind a large number of water molecules, demonstrated superior lubrication effects compared to the P(DMA-NVP) coating. The study provides an in-depth understanding of the lubrication behavior of the self-adhesive coatings to enhance the functionality and application in biomedical engineering.
研究领域:
生物医学工程
·
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 39
·22364-22372
·
IF 12.732
Ying Li,Xia Zhong,Xianwen Wu,Mingqi Li,Wei Zhang,Dan Wang
To develop high-performance and low-cost anode materials for sodium ion batteries, novel Bi/C nanosheet microspheres with an open pore structure (labeled as ops-Bi/C nanosheet microspheres), in which nanosheets are assembled from Bi nanospheres and disordered C, are synthesized through facile methods using Bi(NO3)3, glucose and ethylene glycol as raw materials. Benefiting from the synergy of the material's unique microstructure, carbon coating and NaPF6–diglyme electrolyte, the ops-Bi/C nanosheet microspheres exhibit a higher stable reversible capacity (∼400 mA h g−1 at 0.1 A g−1) than the theoretical capacity of Bi metal, excellent rate performance (396, 393, 395, 392 and 381 mA h g−1 at 0.2, 1, 5, 10 and 20 A g−1, respectively) and long cycle life (361 mA h g−1 after 10 000 cycles at 5 A g−1). Moreover, even if the mass loading of the ops-Bi/C nanosheet microspheres exceeds 10 mg cm−2, the electrode still shows a high reversible capacity of 321 mA h g−1 at 0.8 A g−1 with good cycle performance. The sodium ion full cells composed of the ops-Bi/C nanosheet microsphere anode and commercial Na3V2(PO4)3 (NVP) cathode exhibit high energy density (174 W h kg−1(total) at 0.1 A g−1(NVP)) and long cycle performance (600 cycles at 1 A g−1(NVP)).
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）