RARE METALS
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2025
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IF 11
Liu Yu-Kun,Pang Yu-Chen,Li Chao-Qun,Zhang Xiao-Yue,Hu Xue-Chun,Chen Wei,Yu Xue-Bin,Xia Guang-Lin
As a typical reactive composite hydrogen storage system, 2LiBH 4 –MgH 2 holds an ultrahigh hydrogen storage capacity of 11.5 wt%. However, it suffers from sluggish hydrogen storage kinetics due to the difficult nucleation of MgB 2 . Herein, amorphous VB 2 nanoparticles with an average size of approximately 32 nm are synthesized to enhance the hydrogen storage performance of 2LiBH 4 –MgH 2 composite. VB 2 , sharing the same hexagonal structure with MgB 2 with a d -value mismatch ratio of only 2.28%, could serve as effective nucleation sites for promoting the formation of MgB 2 . Theoretical calculations reveal that the introduction of VB 2 significantly reduces the binding energies of B and Mg, facilitating in situ nucleation of MgB 2 . As a result, after the introduction of VB 2 nanoparticles, complete hydrogen desorption of 9.23 wt% is achieved for 2LiBH 4 -MgH 2 within 2 h at 400 °C, which is 4 times shorter than the time required for pure 2LiBH 4 -MgH 2 , and no nucleation incubation period for hydrogen desorption is observed even at a low temperature of 380 °C. More importantly, a reversible capacity of 9.3 wt%, corresponding to a capacity retention of 100%, could be preserved after 10 cycles of hydrogen storage, demonstrating stable reversible hydrogen storage performance. This study provides a novel technological pathway for improving the reversible hydrogen storage performance of composite metal hydrides and offers significant insights into the development of high-performance hydrogen storage materials. Graphical
研究领域:
材料科学
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能源存储
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2019
·
IF 3.42
Hao Lu,Shengtao Zhang,Zhiheng Zhao,Yang Zhou,Weihua Li
In this paper, VB 2 had been added to modify the simple oligoanilines integrated with rGO for further improving the corrosion protection properties. Trimer aniline (TA) had been synthesized to fabricate a novel composite with rGO after functionalized with VB 2 . Through the combination of VTA and rGO, enhanced electrical properties were discovered, which were attributed to the graphitic structure and the π-π* interactions between rGO and VTA. As a result, VTA-rGO composite provided excellent barrier performance against corrosive electrolyte diffusion and owned better corrosion protection properties than TA and VTA individually, with the combination of VTA and rGO.
研究领域:
材料科学
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腐蚀与防护
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DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 8
·1071
·
IF 4.7
Qian Zhang,Qiang Liu,Weidong Xue,Yong Xiang,Xiaoran Hu
In the present study, poling−free PLLA/VB2piezoelectric composites are fabricated to achieve synchronous sound recognition and energy harvesting. The addition of VB2can interact with PLLA by intermolecular hydrogen bonding, inducing the dipole orientation of C=O in PLLA. Meanwhile, VB2can promote crystallization of PLLA through heterogeneous nucleation. The combination of the two strategies significantly improves the piezoelectric performance of PLLA/VB2composites. The PLLA/VB2can detect the sound frequency with an accuracy of 0.1% in the range of 0–20 kHz to recognize characteristic sounds from a specific source. PLLA/VB2can also convert sound into electrical energy synchronously with an energy density of 0.2 W/cm−3to power up LEDs. Therefore, PLLA/VB2shows great potential in the field of information and energy synchronous collection.
研究领域:
材料科学
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能源技术
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声学工程
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DOI
PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
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2020
·Vol. 22
·期 9
·1-11
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IF 2.132
Lin Jiaxin,Mei Qianwen,Duan Yingchun,Yu Chenhong,Ding Yaping,Li Li
The sensitive determination of VB 2 has broad analytical applications. In this work, a novel VB 2 electrochemical sensor based on the hydrothermal method was constructed to uniformly grow molybdenum disulfide and silver nanoparticles on the surface of electrospun carbon fiber. MoS 2 -Ag-CNF was characterized by scanning electron microscope, EDS spectrum, TEM analysis, cyclic voltammetry, differential pulse voltammetry, and electrochemical impedance spectroscopy. The sensor exhibited a high sensitivity of 0.05 to 40 μΜ with a fast response time and a low detection limit of 0.02 μM. The electrode also showed outstanding selectivity toward various interferences. These results indicate that the MoS 2 -Ag-CNF nanocomposites may be promising electrode materials for electrochemical biosensing.
Graphical abstract
研究领域:
分析化学
·
生物医学工程
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高影响因子
Advanced Materials Interfaces
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2022
·Vol. 9
·期 9
·2102048
·
IF 6.389
Na Yi,Xuan Ling,Qian Zhang,Guokai Xu,Xiaoran Hu,Bingya Li,Wei Lin,Shaoqiu Xiao,Yong Xiang
The highly miniaturized and integrated electronic devices have demanded contactless current sensors with scale miniaturization, structure flexibility, self-powering and heat resistance. Herein, a novel magnetoelectric current sensor (MCS) based on polylactide/VB 2 composites and FeCoV is prepared using in-situ coating and poling-free methods. The use of polylactide/VB 2 composite makes the MCS self-powered and heat resistant, and the use of FeCoV makes the MCS highly flexible. The in-situ coating and poling-free methods endow the polylactide/VB 2 composite and FeCoV good interfacial coupling. As a result, the MCS possesses good linearity over 0.999 and high sensitivity of 0.64 mV/A to the external current, even at a high temperature of 120 °C. Besides, the MCS presents high durability after 200 000 cycles. The MCS with mini size, self-powering, heat resistance, high flexibility and durability has great potential in safety monitoring of electronic devices fields.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Mingxue Yao,Meng Wang,Ye Hu,Nana Li,Baohui Wang
To meet the demands of high-performance and sustainable energy storage, this study proposes a novel VB 2 –air battery system combining a high-capacity vanadium diboride (VB 2 ) anode with a nitrogen-doped carbon-supported iron single-atom catalyst (Fe/NC) cathode. The VB 2 anode, featuring a theoretical 11-electron redox reaction, delivers ultra-high specific capacity, while the Fe/NC cathode exhibits excellent oxygen reduction reaction (ORR) performance and atomic-level dispersion. For the first time, we demonstrate that this SAC-based cathode enables outstanding synergy with the VB 2 anode, resulting in enhanced discharge capacity (up to 3900 mAh·g −1 ), excellent rate capability, and long-term discharge efficiency retention (84.4 % after 10 continuous cycles). This work reveals a promising pathway toward cost-effective, high-performance primary metal–air batteries and offers a new paradigm in cathode–anode reaction coordination for multi-electron systems.
研究领域:
材料科学
·
能源存储技术
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DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2018
·
IF 5.08
Zhouxiang Zhang,Jingkun Xu,Yangping Wen,Tongzhou Wang
A highly-sensitive electrochemical sensor based on single walled carbon nanotubes (SWCNTs) nanocomposite electro-catalyst supported molecularly imprinted poly(3,4-ethylenedioxythiophene) (PEDOT) film modified with two-dimensional layered tungsten sulfide (WS 2 ) nanosheet for the detection of vitamin B 2 (VB 2 ) was successfully developed. Molecularly imprinted WS 2 -PEDOT film was prepared by the electrochemical co -polymerization of functional monomer 3,4-ethylenedioxythiophene in the presence of template molecule VB 2 and WS 2 nanosheet. SWCNTs nanocomposite modified electrode was obtained by drop-coating SWCNTs dispersion containing graphene oxide (GO) onto GCE surface. WS 2 was used for improving the denseness and smoothness in the morphology and structure of PEDOT. GO was employed for enhancing the electro-catalytic capacity of SWCNTs and the interaction with template molecule via functional groups. The imprinted sensor was characterized, and its performance and parameters were investigated and optimized using linear sweep voltammetry. Under optimized conditions, the prepared imprinted sensor displayed a good linear response to VB 2 in wide concentration ranges from 0.002 to 0.9 μM with a low detection limit of 0.7 nM, and successfully applied to electrochemically detect VB 2 in drug samples with good reproducibility, repeatability and storage stability. The new design for the facile fabrication of mimic electrode will open up a new horizon in the development of highly-sensitive biomimic/imprinted sensors.
研究领域:
分析化学
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生物医学工程
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材料科学
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2021
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IF 8.742
Ze-Lin Qiu,Wen-Han Yu,Yu-Jie Shen,Bao-Ku Zhu,Li-Feng Fang
High-efficient separation of molecules is of great significance in food, biotechnology, pharmaceutical and dairy industries. To this end, cationic hyperbranched poly (amido-amine)s (HBPs) with different numbers of quaternary ammonium groups were employed as a new kind of 3D spherical macromonomers to fabricate nanofiltration (NF) membranes, through interfacial polymerization (IP) between cationic HBPs and trimesoyl chloride (TMC) on a polyvinyl chloride ultrafiltration (PVC-UF) hollow fiber membrane surface. Apart from the inner voids inside cationic HBP molecules for fast transport of water molecules, sizes and charge properties of the outer voids between cationic HBP molecules can be modulated by changing the numbers of quaternary ammonium groups on cationic HBP molecule surfaces for enhancing both high permeability and selectivity (water permeance and MgCl 2 rejection rate of the resultant NF membrane are up to 310.5 L m −2 h −1 MPa −1 and 92.0% respectively). Based on the separation mechanism of combined steric and Donnan effects, the resultant NF membrane exhibits ultrahigh retentions to molecules with high molecular weights (MWs) or positive charges, thus molecular-level selectivity to VB12/VB2 (neutral molecules with distinct MWs) or VB1/VB2 (cationic/neutral molecules with similar MWs) can be achieved.
研究领域:
化学工程
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材料科学
·
膜技术
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生物技术
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药学
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食品科学
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DOI
高影响因子
COMPOSITES COMMUNICATIONS
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2021
·
IF 6.617
Yuepeng Pang,Yufang Wang,Junhe Yang,Shiyou Zheng
Introduction of reactive additives into MgH 2 is a promising strategy for improving the hydrogen storage performances, but the inevitable formation of inert by-products degrades the effective capacity. In this work, a dual-functional additive, amorphous VB 2 nanoparticles , is introduced into MgH 2 by ball milling , which significantly lowers the working temperatures by over 120 °C without a huge capacity loss. VB 2 reacts with MgH 2 to in-situ form V and MgB 2 during ball milling and dehydrogenation , in which V remains unchanged during cycling and MgB 2 is hydrogen-storage-active that can absorb hydrogen. In addition, V acts as an active catalyst, which provides nucleation sites and decreases the apparent activation energy . Therefore, both the products from this VB 2 additive can make contributions to the hydrogen storage performances, showing a dual-functional effect.
研究领域:
材料科学
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氢气存储
·
纳米材料
·
能量存储
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Qinhong Yin,Sanchun Xu,Linyan Tang,Lihua Yang,Dezhi Yang,Jianhua Lv
A Fe 3 O 4 -VB 2 @CeO 2 ternary nanozyme was designed for METH detection. • Selective recognition of METH over HER/MOR via –NH and electrostatic attraction. • The sensor shows a low LOD of 3.4 ng mL −1 and a wide linear range. • It enables on-site colorimetric detection in serum with good specificity. Selective detection of methamphetamine (METH) over other illicit drugs is essential for forensic analysis and clinical screening, yet conventional methods are expensive, complex, and unsuited for on-site use. Herein, we developed a colorimetric platform based on a Fe 3 O 4 -VB 2 @CeO 2 ternary composite nanozyme for specific METH recognition. The nanozyme was synthesized via a two-step solvothermal method, where Fe 3 O 4 acts as the magnetic core, riboflavin (VB 2 ) serves as an electron mediator, and CeO 2 provides abundant catalytic active sites. Mechanistic studies (FT-IR, XPS, Zeta potential) suggest that METH is adsorbed onto the nanozyme surface through a combination of electrostatic interactions and other non-covalent forces, potentially including hydrogen bonding and π–π stacking interactions. This adsorption appears to modulate the surface chemistry and interfacial electron transfer dynamics, which may contribute to the suppressed generation of hydroxyl radicals (·OH) and the reduced peroxidase (POD)-like activity of the nanozyme. Under optimized conditions, the colorimetric signal shows an excellent linear relationship with the logarithm of METH concentration from 0.005 to 12 μg/mL, with a detection limit of 3.4 ng/mL. The sensor exhibits high specificity for METH, with negligible response to heroin (HER) or morphine (MOR), and shows negligible interference from various metal ions, amino acids, metabolites, and serum components. This work presents a visual strategy for on-site rapid METH detection and offers a plausible mechanistic interpretation of nanozyme inhibition based on indirect evidence. Download: Download high-res image (339KB) Download: Download full-size image
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高影响因子
TALANTA
·
2022
·
IF 6.556
Zhimin Liu,Jie Wang,Chen Cui,Limei Zheng,Leqian Hu
An ultrasensitive resonance energy transfer based “on-off” switch electrochemiluminescence (ECL) immunosensing strategy was proposed and applied for prostate specific antigen (PSA) detection. In detail, self-enhancing nanohybrids of nano-CeO 2 and AuNPs decorated graphitic carbon nitride quantum dots (CeO 2 –AuNPs–g-CNQDs) were synthesized, which produced high ECL emission with coreactant K 2 S 2 O 8 for “switch-on” state. Noticeably, due to the reversible Ce 3+ ↔ Ce 4+ reaction, nano-CeO 2 could serve as highly-efficient coreaction accelerator and induce the decomposition of S 2 O 8 2− into SO 4 • - , which endowed the g-CNQDs/K 2 S 2 O 8 system with enhanced ECL emission. Moreover, AuNPs acted crucial role in promoting the electronic transmission rate and providing sites to immobilize the biomolecules. On the other hand, the AgNPs-VB 2 nanocomposites were used as dual labels to quench the ECL signal of g-CNQDs-K 2 S 2 O 8 system via ECL-RET, leading to the decreased ECL for “switch-off” state. On the basis of sandwich-typed immunosensing strategy, the developed ECL immunosensing platform exhibited sensitive response to PSA in a linear range of 1.0 × 10 −5 _ 50 ng mL −1 with a low detection limit of 0.0045 pg mL −1 ( S/N = 3). This work provided a promising tool in early clinical diagnostics of prostate cancer.
研究领域:
生物医学工程
·
分析化学
·
肿瘤学
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DOI
PubMed
高影响因子
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