SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.8
Jichang Li,Yangchun Zheng,Yue Zhou,Zijuan Fang,Sihang Zhang,Yonghui Zhou,Xiuyi Lin,Jiangtao Xu
Semiconductor-based Surface-enhanced Raman Scattering (SERS) substrates generally suffer from critical drawbacks, including insufficient surface adsorption sites and weak enrichment capability toward target probe molecules. To address the bottleneck of limited adsorption and enrichment performance of semiconductor SERS materials, this study proposes a molecular enrichment strategy. V 2 O 5 nanorods rich in oxygen vacancies and with V 5+ /V 4+ mixed valence states are used as the SERS-active component. Benefiting from the three-dimensional porous network, high specific surface area and abundant surface functional groups of bacterial nanocellulose (BNC), efficient adsorption and enrichment of probe molecules are realized, thereby achieving synergistic enhancement. The V 2 O 5 /BNC composite SERS substrate is fabricated via a facile vacuum filtration method. The results demonstrate that the composite substrate exhibits a 237.39% higher SERS signal intensity toward methylene blue (MB) than the pure V 2 O 5 substrate, achieving a low limit of detection of 1 × 10 −6 mol/L, along with excellent signal reproducibility and long-term stability. Adsorption and surface analyses suggest that electrostatic interactions and hydrogen bonding facilitate MB enrichment within the composite membrane. The enhanced Raman response is attributed to the combined effects of BNC-mediated molecular enrichment, possible V 2 O 5 -MB interfacial charge transfer, and morphology-dependent optical contributions. This work presents a facile strategy for constructing flexible, noble-metal-free semiconductor composite SERS substrates with good reproducibility and storage stability.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2026
·
IF 7.1
Lilong Zhou,Chuanshi Tan,Haichao Jiang,Yanchao Qu,Ying Zhang,Yongzhao Zhang,Jimmy Yun
To develop efficient catalysts for chlorinated VOC combustion with enhanced chlorine resistance, V–TiO 2 solid-solution catalysts were prepared via the sol–gel (SG) method and evaluated for chlorobenzene oxidation. In contrast to those synthesized by hydrothermal (HT) and impregnation (IM) methods, the SG-derived V–TiO 2 formed a solid solution with abundant V–O–Ti bonds and V 2 O 5 –TiO 2 interfaces. The TiO 2 acts as an electron donor to V 5+ , promoting oxygen vacancy formation, which facilitates oxygen adsorption and activation. As the amount of incorporated vanadium increases, the activity of the V–TiO 2 catalyst exhibits a volcanic pattern, indicating that constructing an appropriate amount of V 2 O 5 –TiO 2 interface is the key to improving the low-temperature activity of the V–TiO 2 catalyst. The SG-prepared V 2 O 5 /TiO 2 achieved 90% chlorobenzene conversion at 250 °C (GHSV = 22,500 h −1 , C = 1000 ppm), which is significantly lower than previously reported V 2 O 5 /TiO 2 catalysts. There were only a few kinds of byproducts and no chloride organic byproducts were generated. The catalyst also exhibited excellent stability and water resistance. This work offers an effective strategy for designing stable catalysts for chlorinated VOC combustion.
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LANGMUIR
·
2026
·
IF 4.4
Cui Dongkai,Zhao Di,Zhao Chenchen,Gao Tianyu,Li Yan,Wang Nan,Yao Kaisheng,Lu Weiwei
One-dimensional V 2 O 5 nanostructures,
with
their anisotropic crystal structure, accessible oxide/electrolyte
interface, and short radial carrier transport distance, are promising
photoelectrode materials for photoelectrochemical (PEC) detectors.
However, controllably ordered V 2 O 5 nanowire
bundles have yet to be achieved, and the photoresponse feasibility
of such well-defined one-dimensional architectures requires further
investigation. Herein, we present an alcohol-mediated hydrothermal
approach to engineer directionally organized V 2 O 5 nanowire bundles and subsequently evaluate the self-powered PEC
ultraviolet detection performance of a representative ethanol-derived
sample. Alcohols with carbon chains of different lengths were employed
to regulate the morphology of the V 3 O 7 ·H 2 O precursor, which was subsequently converted into orthorhombic
V 2 O 5 by calcination while largely preserving
its one-dimensional morphology. Among the investigated solvents, ethanol
produced the most uniform and well-organized nanowire bundles, consisting
of highly crystalline individual nanowires with an average diameter
of approximately 61.09 nm. Using this ethanol-derived V 2 O 5 photoanode, a PEC detector was subsequently assembled.
Under 365 nm illumination at zero bias, the device exhibited reproducible
photocurrent switching and a response with nearly linear dependence
on light intensity over the range of 13.2–105.1 mW/cm 2 . Under weak illumination, a maximum responsivity of 4.60 ×
10 –5 A/W and an external quantum efficiency of 0.0157%
were obtained, whereas the photo-to-dark current ratio reached 21.97
at 105.1 mW/cm 2 . Furthermore, the detector exhibited fast
temporal response, with rise and decay times of 43 and 49 ms, respectively.
These results demonstrate that the nanostructure organization induced
by solvents provides a relatively simple route for fabricating V 2 O 5 PEC detectors with fast response and operation
at zero bias. This work highlights the potential of ethanol-derived
V 2 O 5 nanowire bundles for self-powered UV photodetection,
particularly in terms of fast response, zero-bias operation, and high
sensitivity under weak illumination.
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iScience
·
2025
·
IF 4.1
Shen Wang,Xueying Sun,Hongbo Xu
Aqueous Zn-ion batteries offer safe and cost-effective energy storage, yet their energy density requires improvement. While vanadium pentoxide (V 2 O 5 ) possesses attractive redox activity, its practical implementation is hindered by structural instability and limited cycling performance. designed core–shell V 2 O 5 @PANI nanotubes through in situ polymerization to enhance Zn 2+ diffusion and structural resilience. This design improves interfacial charge transfer and stabilizes the host framework during Zn 2+ insertion/extraction. This architecture facilitates interfacial charge transfer and stabilizes the host framework during cycling. The optimized cathode achieves a high capacity of 462.4 mAh g -1 at 0.5 A g -1 with 96.5% capacity retention over 500 cycles. This work demonstrates a synergistic combination of nanostructural control and interfacial engineering, providing a generalizable materials design strategy for advanced electrochemical energy storage systems.
研究领域:
材料科学
·
电化学
·
储能
·
纳米材料
·
电池技术
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ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Yuancheng Yao,Jinhuan Yao,Jiqiong Jiang,Xin Tang,Jianwen Yang,Yanwei Li
Developing bifunctional materials with concurrent electrochromic and electrochemical energy storage capabilities is crucial for advancing the construction of energy-saving smart windows, smart sensors, implanted displays, and electronic skins. Herein, a layered V 2 O 5 · n H 2 O thin film is fabricated through a facile electrodeposition method with V 2 O 5 sol as electrolyte, and its Mg 2+ storage and electrochromic performances are explored for the first time. This layered V 2 O 5 film exhibits outstanding Mg 2+ storage performance, delivering an areal specific capacity of 17 μAh cm −2 at 0.5 mA cm −2 , showing no capacity decay during 500 cycles, and exhibiting superior rate performance. It achieves an optical contrast (Δ T ) of 64.63% at 769 nm wavelength (between orange-red and dark green) and a rapid switching speed. Notably, the color transition exhibits a distinct potential dependence and high optical distinguishability: it reversibly switches between green, orange, and red hues at discrete potential points during the electrochemical cycling process. The structure/performance relationship of the film is analyzed via in situ Raman, ex situ XRD, XPS, and DFT calculations. This study provides clues for developing Mg 2+ -intercalation-based electrochromic energy storage bifunctional materials.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Liqin Yu,Xin Li,Yiyu Lou,Weina Deng
The limited availability of lithium resources constrains the further development of dominant lithium-ion batteries. Potassium-ion batteries (PIBs), benefiting from the natural abundance of potassium, rapid ion transport kinetics, the high-capacity, and low-potential K metal anode, present a promising alternative. However, practical K metal anodes are plagued by dendrite growth, interfacial instability, and large volume changes. To address these issues, a potassiophilic host material (CC@V@K) was fabricated by first synthesizing V 2 O 5 nanoneedles on carbon cloth (CC@V 2 O 5 ) via in situ hydrothermal growth, followed by infiltration with molten K. This CC@V 2 O 5 host achieves complete potassium wetting within 1 s, features a porous structure to buffer volume changes of K, and offers abundant nucleation sites for uniform K deposition. Electrochemically, the symmetric cell exhibits stable cycling for 1200 h at 0.5 mA cm −2 . When paired with a K 0.5 V 2 O 5 cathode, the full cell retains 85.1% capacity after 300 cycles at 20 mA g −1 and delivers 68.5 mAh g −1 at 200 mA g −1 . This work demonstrates an effective host design strategy, advancing the development of practical PIBs.
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CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Yongzheng Jia,Mingyong Wang,Jiajun Xie,Yu Qing,Wei-Li Song,Shuqiang Jiao
High-arsenic vanadium pentoxide is a vanadium product from stone coal and Bayer crystallized vanadium slag. Excessive arsenic impurity is a serious limiting issue to prepare vanadium electrolyte of all-vanadium redox flow batteries. Density functional theory simulations verified that the adsorption energy, binding energy, and desorption energy of arsenic ions with typical C-OH sites on graphite electrode were higher than those of vanadium ions. Arsenic ions would occupy the reaction sites and hinder the redox reaction of vanadium ions, which deteriorated vanadium electrolyte performances. A combined strategy based on reduction roasting and sulfidation precipitation was proposed to realize deep arsenic removal from high-arsenic V 2 O 5 . Phase characterization of high-arsenic V 2 O 5 revealed that arsenic existed as As 2 O 5 (69 wt%) and As 2 O 3 (31 wt%). Thermodynamic calculations demonstrated that effective arsenic removal was feasible based on reduction roasting using V 2 O 3 and sulfidation precipitation using Na 2 S. The removal efficiency of arsenic reached 68.3 % under the reduction roasting conditions of n (V2O3) /n (As2O5) = 8:1, 650 °C and 4 h. Under the sulfidation precipitation conditions of n (S2-) /n (As3+) = 9:1, 80 °C and pH = 3, the precipitation efficiency of arsenic was 82 %. The total arsenic removal efficiency in the whole process for vanadium electrolyte preparation from high-arsenic V 2 O 5 reached 99.5 %. The arsenic content in as-prepared vanadium electrolyte was only 1 ppm, which met the requirements of China national standard (GB/T 37204–2018). As-prepared vanadium electrolyte exhibited comparable electrochemical performances with commercial vanadium electrolyte. The proposed strategy achieves deep arsenic removal of high-arsenic V 2 O 5 and is of great significance for the preparation of vanadium electrolyte.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yanyan Sun,Chenlong Wang,Jun Natsuki,Yifan Zu,Zhen Wang,Wenqi Nie,Toshiaki Natsuki
Hydrated vanadium pentoxide (V 2 O 5 ·nH 2 O, VOH) has emerged as a promising cathode material for zinc-ion batteries (ZIBs) owing to its tunable layered architecture, multivalent redox activity, and high theoretical capacity. However, its practical implementation is constrained by sluggish Zn 2+ diffusion kinetics and structural degradation during cycling, which significantly limit its rate capability and long-term durability. Herein, we propose a high-performance composite cathode material integrating VOH with MXene (Ti 3 C 2 T x ) via a two-step hydrothermal synthesis and interfacial bonding strategy. The MXene nanosheets serve as both conductive scaffolds and structural spacers, expanding the interlayer spacing of VOH while forming a stable V-O-Ti heterointerface. This synergistic configuration not only enhances electronic conductivity but also mitigates volumetric strain during Zn 2+ intercalation/ deintercalation. Consequently, the MX@VOH composite delivers a specific capacity of 325.6 mAh g −1 at 0.5 A g −1 and retains 86 % capacity after 1000 cycles at 5 A g −1 , outperforming most reported VOH-based cathodes. This work provides a universal and scalable interface engineering approach for designing high-performance cathodes in advanced energy storage systems.
研究领域:
材料科学
·
电化学
·
储能
·
纳米技术
·
无机化学
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Donghua Jia,Feng Zheng,Yingying Niu,Xiaodong Mao,Yue Yang,Qiang Zhen,Peng Li,Yi Yu,Shaowei Zhang
V 2 O 5 nanobelt arrays (VNBAs) is fabricated on Ni foam by using an easy hydrothermal route and then NiO nanosheet arrays (NNSAs) is grown on VNBAs by using a simple chemical bath deposition approach to form VNBAs/NNSAs composite. It is found that the monocrystalline VNBAs with a lamellar structure is uniformly distributed on nickel foam and the polystalline NNSAs with a close packed structure is closely covered on the VNBAs. CV, GCD, EIS and CA electrochemical techniques are used to test the supercapacitive properties of the VNBAs/NNSAs composite. The single electrode displays a high specific capacity of 875 F g −1 , a good cycling stability of 96.1%, a small charge transfer resistance of 1.32 Ω and a rapid ion diffusivity of 2.5 × 10 −8 cm 2 s −1 . The symmetric supercapacitor combined by the VNBAs/NNSAs displays a large energy density of 120.1 W h kg −1 at 400 W kg −1 and it retains 68.3 W h kg −1 at 8000 W kg −1 . The VNBAs/NNSAs composite with high electrochemical performance is a potential supercapacitor electrode material.
研究领域:
材料科学
·
储能技术
·
电化学
·
纳米材料
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ENERGY & FUELS
·
2026
·
IF 5.3
Ying Ba,Guang Yang,Ruiting Jiang,Jiaji Tang,Yuancheng Xu,Wei Liu
The multivalent, low-cost, and high-capacity characteristics of vanadium-based oxides have attracted much attention in the study of cathode materials for sodium-ion batteries (SIBs). Nonetheless, the depressed diffusion kinetics and poor electrical conductivity limit the application, which is mainly due to the large radius of the sodium ion. To solve these problems, we obtained the cathode material with enriched oxygen vacancies by compositing mesocarbon microbeads (MCMB) with V2O5 to achieve more sodium storage sites and electrical conductivity. In particular, V2O5/MCMB as cathodes for SIBs delivers 99.65 mAh g–1 at 0.5 A g–1 and maintains 91.67% of their initial capacity after 60 cycles. It also has a remarkable rate performance and excellent diffusion coefficient (1.59 × 10–9–2.0 × 10–12 cm2 s–1). It provides innovative insights for the further progress of cathode materials used in SIBs.
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Advanced Optical Materials
·
2021
·Vol. 9
·期 24
·2101866
·
IF 9.926
Wei Ji,Linfang Li,Jing Guan,Ming Mu,Wei Song,Lei Sun,Bing Zhao,Yukihiro Ozaki
Enhancement of the light-matter coupling is a promising approach to improve the sensitivity and universality of semiconductor-based surface-enhanced Raman scattering (SERS). Herein, it is demonstrated that hollow multi-shelled V 2 O 5 microstructure can be utilized as an active substrate to integrate multiple synergistic contributions. The experiments and numerical simulations clearly reveal that the excellent SERS activity originates from the unique double-shelled hollow structures, which allow multiple reflections of electromagnetic waves. This light-trapping effect provides an efficient resonance absorption for charge-transfer (CT) and exciton enhancements. More importantly, the coupling of outer and inner shells remarkably generates high electric field contribution for SERS enhancement. Besides, the symmetry analysis of vibrational modes based on density functional theory well explains the origin of the CT coupling of Herzberg–Teller selection rules. The synergy of all factors contributes to a significant increase in the sensitivity and universality of semiconductor SERS. It is anticipated that the strategy demonstrated in this study will widen the scope of currently available methodologies for designing substrates with high semiconductor SERS activity.
研究领域:
材料科学
·
纳米技术
·
拉曼光谱
·
光学材料
·
半导体物理
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 11
·118314
·
IF 6.3
Shuai Fu,Kun Lin,Zhixin Gao,Detian Wan,Yiwang Bao
A novel high-entropy ceramic (La 0.2 Nd 0.2 Y 0.2 Eu 0.2 Gd 0.2 ) 2 Ce 2 O 7 (RE 2 Ce 2 O 7 ) was synthesized, its thermophysical properties and corrosion behavior against Na 2 SO 4 -V 2 O 5 molten salt were systematically investigated. Owing to the synergistic effect of the high-entropy configuration, RE 2 Ce 2 O 7 exhibits a remarkably low thermal conductivity, characterized by 1.22 W·m −1 ·K −1 at 1200 ℃. The Debye temperature Θ D of RE 2 Ce 2 O 7 is 493 K and the coefficient of thermal expansion (CTE) is 11.4 × 10 −6 K −1 . During corrosion process at 900 ℃ ∼ 1100 ℃, rare-earth ions are precipitated from the lattice and combined with VO 4 3- ions formed rod-shaped REVO 4 phases, while Ce 4+ ions react with O 2- formed CeO 2 . With increasing temperature, REVO 4 grains are coarsened and cover the CeO 2 phase. When the molten salt is exhausted at 1100 ℃, Ce 3+ in REVO 4 is continuously oxidized to Ce 4+ and diffused to the surface, facilitating extensive nucleation and growth of CeO 2 .
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