Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 19
·6470-6477
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IF 7.059
Wen Zeng,Xiaoguo Fu,Li Yu,Tingting Shi,Pengyi Liu,Jianbin Xu,Jian Chen,Chen Qiulan,Xiaomu Wang,Weiguang Xie
The preparation of a pure phase has long been the key obstacle for the fundamental research and device application of Wadsley vanadium oxides (VnO2n+1) due to the mixed-valence feature and closeness in thermodynamic phase diagrams. Herein, we demonstrate a melt-assisted pyrolysis process to prepare pure V6O13 (n = 6) using a V2O5 precursor film. V6O13 with an atomic flat (00l) terrace and length up to a millimeter was prepared on a c-cut sapphire surface. Both ex situ and in situ real-time investigations on the growth process reveal that the melting and decomposition of V2O5 started as synchronization processes for the nucleation of V6O13. The endothermic melting process provides the main driving force for the rapid growth of V6O13 crystals along the melt/solid interface. The as-prepared V6O13 crystal sheets show a broadband photoresponse capability (0.4–8.8 μm) with a rise/fall time of 42 ms/50 ms, and the maximum EQE of 5.4 × 104%. Spatial photocurrent imaging reveals that both photoelectric and bolometer effects contribute to the photoresponse. This study offers a feasible and scalable method for the preparation of high quality mix-valence vanadium oxide for future opto-electrical and energy storage devices.
研究领域:
材料科学
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光学工程
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高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Hong Zeng,Yue Tang,Wenying Zou,Chunxiao Wang,Han Tao,Yuangen Wu
V6O13 nanobelts with good crystallinity and distinct facets were prepared by a facile one-pot hydrothermal method and were first found to possess the peroxidase-mimicking activity. A simple colorimetric sensor using V6O13 nanobelts as catalyst was established for detecting Cd(II) and Pb(II) simultaneously in actual water samples. It was confirmed that V6O13 nanobelts could generate hydroxyl radicals (·OH) from H2O2 to oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) to produce a blue product. Heavy metals such as Cd(II) or Pb(II) could inhibit the peroxidase-mimicking activity of V6O13 nanobelts, making the sensing solution light blue or even colorless. The catalytic reaction of V6O13 nanobelts was exhibited to be a ping-pong mechanism, and the effect of heavy metals on V6O13 nanobelts was consistent with noncompetitive inhibition. The absorbance variation of a colorimetric sensor is relevant to the amount of heavy metals, which enabled us to easily discriminate whether Cd(II) or Pb(II) exceeded the maximum permissible quantity within 20 min. The limit of detection (LOD) of the constructed colorimetric sensor was determined to be 1.89 μg·L–1 for Cd(II) and 2.11 μg·L–1 for Pb(II). The colorimetric sensor showed distinguished selectivity for other competitive metal ions and was validated for detecting heavy metals in several types of actual water samples.
研究领域:
材料科学
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环境科学
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分析化学
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DOI
高影响因子
Inorganics
·
2023
·Vol. 11
·期 11
·429
·
IF 2.9
Li Liu,Siyu Li,Detai Shi,Qifu Bao,Tiangui Zhao,Wei Zhu,Xiaolong Li,Jianer Zhou
The emergence of drug resistance due to the overuse of antibiotics has made the prevention and treatment of invasive fungal infections caused byCandida albicans(C. albicans) a great challenge. Oxygen vacancy-rich inorganic materials show great promise in the antimicrobial field due to their unique physicochemical properties. Defect engineering can significantly optimize the electronic structure of inorganic materials to further enhance their antimicrobial activity. We designed oxygen vacancy defect-rich V6O13powders using the hydrothermal-calcination method and investigated their anti-C. albicansactivity. The results showed that the stronger antibacterial activity is attributed to the fact that the optimized V6O13powder oxygen vacancy defects induced a reduction reaction of dissolved oxygen in the environment, which produced ROS with strong oxidative properties, causing damage to the wall membrane ofC. albicansand leakage of intracellular material. The minimum inhibitory concentration (99% or more inhibition) of V6O13powders is 4 mg/mL. This work not only provides a facile method for constructing oxygen-rich vacancies in V6O13powders, but also provides new insights into the potential of inorganic materials optimized by defect engineering for efficient antimicrobial activity.
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Scientific Reports
·
2024
·Vol. 14
·期 1
·1-12
·
IF 3.8
Liu Li,Li Siyu,Zhu Wei,Bao Qifu,Liang Yan,Zhao Tiangui,Li Xiaolong,Zhou Jianer
In this study, pure V 6 O 13 and nickel ion-doped V 6 O 13 powders were synthesized by a simple hydrothermal-calcination method, and their broad-spectrum antimicrobial properties and mechanisms were investigated. The crystal structure, morphology, and chemical state of the powders were thoroughly analyzed by XRD, SEM, TEM, XPS, and UV–Vis. Their antimicrobial properties and mechanisms were evaluated by the ring of inhibition, bio-SEM, live-dead cell staining, ROS detection, and protein leakage experiments. The results showed that nickel ion doping modulated the oxygen defects of V 6 O 13 , generating more reactive oxygen species and leading to more severe oxidative stress, resulting in a broad-spectrum and highly efficient antimicrobial effect. This study also revealed the antimicrobial mechanism based on oxygen defect -induced ROS production, which caused cellular oxidative stress damage, leading to leakage of intracellular substances and cell death. This study not only demonstrates the potential of V 6 O 13 as an efficient antimicrobial agent but also provides a strong experimental basis and theoretical support for the engineering design and optimization of novel antimicrobial materials by modulating material defects through ion doping.
研究领域:
材料科学
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微生物学
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生物医学工程
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2024
·Vol. 35
·期 7
·1-9
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IF 2.8
Liu Li,Zhu Wei,Li Siyu,Bao Qifu,Zhao Tiangui,Shi Detai,Li Xiaolong,Zhou Jianer
Investigating the impact of hydrothermal duration on electronic magnetism, two distinct samples were synthesized: the V 6 O 13 phase (S1) with 0.5 h of hydrothermal reaction, and the V 6 O 13 and VO 2 coexistent phase (S2) with 6 h of reaction. X-ray diffraction identified S1 as monoclinic C2/m, and S2 with a 4:1 ratio of V 6 O 13 in P21/c space group VO 2 . Electron microscopy revealed rod-like V 6 O 13 and spherical VO 2 . Both samples exhibited metal-insulator transitions, with the presence of VO 2 in S2 elevating the metal-insulator phase transition onset temperature and widening the transition range. S1 exhibits antiferromagnetic ordering at low temperatures (T N ~ 55 K) and follows the Curie-Weiss law above the metal-insulator transition temperature, while the behavior of S2 was modeled by a combination of Pauli and Curie-like paramagnetism, aligning well with experimental data. Small hysteresis loops in both samples suggested weak ferromagnetism; the linear loop of S1 indicated strong vanadium electron correlation, and the incomplete S-loop of S2 was attributed to the influence of VO 2 on the electronic magnetism of V 6 O 13 .
研究领域:
材料科学
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凝聚态物理
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无机化学
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高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2022
·Vol. 26
·期 5
·1175-1183
·
IF 2.747
Liu Xin,Zou Zhengguang,Meng Jianying,Zhang Shuchao,Zhong Shenglin,Li You
A V 6 O 13 micro-flower was synthesized via a facial hydrothermal method using ammonium metavanadate and oxalic acid dihydrate and combined with subsequent heat treatment. The effects of oxalic acid concentration and subsequent calcination temperature on the crystallinity and microstructure of V 6 O 13 are discussed in detail. We have compared these data to determine the optimal amount of reducing agent and calcination temperature and futher explored the electrochemical properties of cathode materials. The results show that the concentration of oxalic acid and calcination temperature has a great influence on the morphology and crystallinity. When paired with Li anode, V 6 O 13 cathode exhibits excellent electrochemical performance that the initial specific capacity is 376.7 mA g −1 and the capacity retention of 48.3% after 100 cycles at the current density of 100 mA g −1 . This work provides some references for the development of high-performance lithium-ion battery cathodes. Graphic abstract
研究领域:
材料科学
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电化学
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能源存储
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纳米结构材料
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电池技术
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Qiaoling Shen,Caiqing Song,Meirou Jing,Linghui Hao,Lijie Sun,Lijun Bian
To address the low conductivity and poor cycling stability of V 6 O 13 for supercapacitors, Ni 2+ , Co 2+ , and Mn 2+ -doped V 6 O 13 (denoted as XVO, where X = Ni, Co, and Mn) nanomaterials were synthesized using a one-step solvothermal method. A systematic comparative investigation revealed a counterintuitive yet insightful finding: Mn doping induces the largest lattice expansion; however, MnVO delivers the poorest electrochemical performance, whereas CoVO with only moderate lattice expansion achieves the best performance. Through comprehensive characterization, we demonstrated that Co 2+ uniquely balances three critical functions: optimizing lattice expansion, maximizing V 4+ /oxygen vacancy concentration, and directing the formation of highly dispersed nanobelts, creating a triple synergy that neither Ni 2+ nor Mn 2+ can replicate. Consequently, the CoVO electrode exhibited exceptional cycling stability with 93.1% capacity retention after 10000 cycles at 100 A∙g −1 , along with a high specific capacitance (753.7 F∙g −1 at 1 A∙g −1 ). Furthermore, an assembled CoVO//CoVO symmetric supercapacitor operated stably at 0–1.6 V, achieving a maximum energy density of 91.1 Wh∙kg −1 at 400 W∙kg −1 and retaining 42.2 Wh∙kg −1 at 8000 W∙kg −1 . This study identifies Co 2+ as the optimal dopant for V 6 O 13 -based electrodes and establishes that optimal performance requires a multi-scale synergistic optimization of the structure, electronics, and morphology, rather than the sole pursuit of maximum interlayer spacing.
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高影响因子
JOURNAL OF POWER SOURCES
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2023
·
IF 9.2
Ming Chen,Hideo Kimura,Xu Yang,Haihua Huang,Chuanxin Hou,Xiubo Xie,Fanchao Meng,Xueqin Sun,Ping Ren,Wei Du,Xiaoyang Yang
Among various zinc-ion batteries (ZIBs) cathodes, vanadium-based oxides have received a great deal of research due to their high theoretical specific capacity. However, the severe problem of dissolution and sluggish kinetics of Zn 2+ diffusion in vanadium-based oxides limit their further development as cathode materials for ZIBs. Herein, a novel monoclinic V 6 O 13 nanoflowers (VONs) cathode is synthesized via an in-situ surface carbon reduction method from orthorhombic V 2 O 5 at specific temperature. Benefiting from the intrinsic open tunnel-like structure and mixed states V 4+ /V 5+ of V 6 O 13 , which are beneficial to facilitate the diffusion of Zn 2+ and improve electronic conductivity of VONs. In addition, the dissolution of vanadium in VONs is suppressed remarkably. Based on the synergy of the advantages, the ZIBs with VONs electrode show excellent electrochemical performances , including high specific capacity (420 mAh g −1 at 0.2 A g −1 ) and rate capability, especially long-term cycling stability (above 88.9% capacity retention after 6000 cycles). Moreover, the kinetics and mechanism of the Zn 2+ storage and diffusion in VONs have been investigated by combining experimental data with density functional theory (DFT) calculations. This in-situ preparation strategy provides a new approach to regulate the structure and phase of vanadium-based oxides to meet the requirements of high-performance ZIBs.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2023
·Vol. 25
·期 45
·31003-31011
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IF 3.3
Lingjiang Kou,Yong Wang,Jiajia Song,Taotao Ai,Panya Wattanapaphawong,Koji Kajiyoshi
Aqueous zinc ion batteries (AZIBs) offer a promising approach for electrical energy storage, combining cost-effectiveness and enhanced thermal safety. However, the cathode material, vanadium oxide, while known for its excellent theoretical specific capacity, faces a challenge in terms of its poor electronic conductance. In this study, we present a novel strategy to address this limitation by constructing the V5O12·6H2O/V6O13/CNT (VOH/CNT) nanocomposite, resulting in significantly improved electrochemical performance. This nanocomposite was synthesized through a facile solvothermal method, yielding a unique floral spherical structure featuring a central cluster and multiple smaller groupings. The integration of CNTs into the composite significantly enhanced its electronic conductance, effectively mitigating the electronic conductance issue associated with vanadium oxide. Moreover, the composite retains crystalline water within its structure, playing a crucial role in providing a favorable ion-conductive pathway. Consequently, the VOH/CNT nanocomposite exhibits an impressive reversible capacity of 201 mA h g−1 at 50 mA g−1, surpassing that of VOH (116 mA h g−1). Remarkably, even at a high current density, the VOH/CNT nanocomposite demonstrates an exceptional capacity retention, maintaining a capacity of 150 mA h g−1 over 500 cycles at 1 A g−1. Its outstanding electrochemical performance can be attributed to its distinctive structural arrangement, the conductive network facilitated by CNTs, and the introduced crystalline water component.
研究领域:
材料科学
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电化学
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Li Chen,Hui Zhou,Zhi Chen,Zhaohui Wu,Yabing Chen,Haijun Zeng,Juntong Huang,Huiyong Yang,Di Guo
Rechargeable aqueous zinc-ion batteries (AZIBs) are attractive due to their superior safety, rich zinc resources, and cost-efficient. Vanadium-based oxides , as popular cathode materials , are inevitably subject to dissolution in aqueous solutions, and inherent low electrical conductivity and sluggish reaction kinetics, significantly impeding the performances in Zn 2+ storage. In this study, V 2 O 5 /V 6 O 13 composites are successfully prepared by a novel three-roll milling technique combined with high-temperature treatment to improve these shortcomings. The results demonstrate that the V 2 O 5 /V 6 O 13 electrode sustains excellent cycling (316.0 mAh g −1 at 5 A g −1 after 4000 cycles) and superior rate performance (186.69 mAh g −1 at 20 A g −1 ). Ex-situ characterization reveals that the mechanism involves the co-intercalation of H 2 O with Zn 2+ . It is found by testing in different electrolytes that V 2 O 5 is gradually amorphous in aqueous electrolyte during cycling, which greatly improves the structural stability and enhances the ability for capturing Zn 2+ . Moreover, it is demonstrated by calculations that a higher degree of amorphization promotes the adsorption of Zn 2+ . The present work provides a new idea for the development and mechanism explanation of high-performance AZIB materials.
研究领域:
材料科学
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电化学
·
储能
·
电池技术
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DOI
PubMed
高影响因子
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