Nanoscale
·
2024
·Vol. 16
·期 23
·11250-11261
·
IF 5.8
Tingxia Wang,Xu Zhang,Xiaojiao Yu,Yun Liu,Junpeng Li,Zongbin Liu,Ningning Zhao,Jian Zhang,Jinfen Niu,Qingliang Feng
High-efficiency water electrolysis over a broad pH range is desirable but challenging. Herein, Ru-decorated VS2 on carbon cloth (Ru–VS2/CC) has been in situ synthesized, which features the regulated electronic structure of VS2 by introducing Ru. It is remarkable that the optimal Ru–VS2/CC displays excellent electrocatalytic hydrogen evolution activity with overpotentials of 89 and 87 mV at −10 mA cm−2 in 0.5 M H2SO4 and 1.0 M KOH, respectively. Theoretical calculations and electrocatalytic measurements have demonstrated that introducing Ru induces an enhanced charge density around the Fermi level, facilitating charge transfer and speeding up the electrocatalytic HER kinetics. The Gibbs free energy of the hydrogen intermediate (ΔGH*) of Ru–VS2/CC (0.23 eV) is much closer to zero than that of pure VS2 (0.51 eV) and Ru (−0.37 eV), demonstrating an easier hydrogen adsorption and desorption process for Ru–VS2/CC. The more favorable ΔGH*, differential charge density and the d-band center endow Ru–VS2 with enhanced intrinsic electrocatalytic activity. This study presents a feasible strategy for enhancing electrocatalytic HER activity by the regulation of the electronic structure and the rational integration of dual active components.
研究领域:
材料科学
·
电催化
·
理论计算
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Jinling Zhang,Mengxiang Shang,Yao Gao,Jianyue Yan,Wenbo Song
High visible-light active materials with boosted photoelectric conversion efficiency are the key to fabricate high-performance photoelectrochemical (PEC) sensor. Herein, we report in-situ formation of VS 2 QDs-Bi 2 S 3 heterostructure for promising application in constructing PEC aptasensor. Dramatically enhanced photoelectric conversion capacity is verified by photoluminescence spectroscopy (PL), electrochemical impedance spectroscopy (EIS) and PEC measurements. The intrinsic metallic feature of VS 2 , efficient visible light absorption of Bi 2 S 3 nanotube, and well-aliened band structure between them are responsible to substantially enhanced photocurrent. By covalently linking 5′-NH 2 -terminated lysozyme (Lys) aptamer on the VS 2 QDs-Bi 2 S 3 heterostructure, a self-powered PEC aptasensor for Lys is constructed. Under optimal conditions, ultrasensitive and selective detection of Lys is established in a wide linear range of 3.5 pM-70 nM with good selectivity and stability. The detection limit is 1.1 pM. Trace monitoring Lys in biological systems is realized with desired accuracy and satisfactory recovery. This work illustrates the prospect of VS 2 QDs-based heterostructure for PEC sensing and possible photocatalytic applications.
研究领域:
生物传感
·
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2018
·
IF 11.698
Mengmeng Shao,Yangfan Shao,Shengjie Ding,Jingwei Wang,Jinchen Xu,Yuanju Qu,Xiongwei Zhong,Xinman Chen,Weng Fai Ip,Ning Wang,Baomin Xu,Xingqiang Shi,Xuesen Wang,Hui Pan
Highly efficient, earth-abundant, and low-cost photocatalysts are widely pursued for solar-driven hydrogen generation from water. Herein, we first report vanadium disulfide (VS 2 ) with high hydrogen evolution reaction (HER) activity both in basal and edges to be the co-catalyst of graphitic carbon nitride (g-C 3 N 4 ) for ultrahigh solar-driven hydrogen production . VS 2 -decorated g-C 3 N 4 shows an impressing photocatalytic hydrogen evolution with a rate of 87.4 μmol/h, 26 times higher than pristine g-C 3 N 4 . Our combined experimental and computational studies reveal that the excellent efficiency of the composite is attributed to: (1) effective electron-hole separation and electron transfer from g-C 3 N 4 to VS 2 , resulting from the optimal band alignment between VS 2 and g-C 3 N 4 and metallic characteristic of VS 2 ; (2) fast hydrogen generation on the surface due to the high surface area and excellent HER activity of VS 2 . Our findings demonstrate that VS 2 /g-C 3 N 4 may be applicable in solar-driven water splitting, and the design principle can be applied to search for novel photocatalysts.
研究领域:
材料科学
·
可再生能源
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Jinglian Zhu,Xu Zhang,Haiguang Gao,Yuting Shao,Yana Liu,Yunfeng Zhu,Jiguang Zhang,Liquan Li
Rechargeable magnesium batteries (rMBs) are promising techniques suitable for large-scale energy storage systems with low-cost and high safety. However, their development is severely hindered by strong coulombic effect between bivalent Mg 2+ and cathode materials . In this work, two dimensional hierarchical nano-micro hybrids are synthesized by in-situ generating VS 4 nanosheets on carbon-coated Ti 3 C 2 MXene matrix (denoted as VS 4 @Ti 3 C 2 /C). A high-performance rMB system is built by using the hierarchical nano-micro hybrids cathode, magnesium foil anode, and 0.25 M methylpyrrolidinium chloride in 0.25 M 2PhMgCl-AlCl 3 /tetrahydrofuran as the electrolyte. The existence of V–C bond proves that VS 4 is anchored on the surface of Ti 3 C 2 via a strong chemical bond, rather than simply by adsorption. The unique hierarchical nano-micro structure improves the accessibility of the electrolyte and reduces the charge transfer resistance, leading to a high discharge capacity of 492 mA h g −1 at 50 mA g −1 , an outstanding rate performance of 129 mA h g −1 at 1000 mA g −1 , and excellent cycling performance (over 900 cycles at 500 mA g −1 ). Moreover, reversible intercalation of MgCl + into VS 4 @Ti 3 C 2 /C is revealed by investigating the evolution of the hybrids during different electrochemical states. This study will shed light on designing high-performance MXene-based cathode materials for multivalent batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
多价离子电池
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2022
·
IF 4.598
Dexi Liu,Shichang Xu,Yanmeng Cai,Yue Wang,Jiaqi Guo,Youlin Li
The conventional separation technologies, like chemical precipitation and adsorption processes, cannot quickly and selectively separate and recycle heavy metal ions from waste. Due to its rich sulfur content and excellent electrical conductivity, vanadium disulfide is a potential material for effectively removing lead from wastewater. The vanadium disulfide material with selective adsorption ability was introduced into CDI technology to construct a coupling technology with both advantages. The N -doped modified ZIF@vanadium disulfide (ZAC@VS 2 ) composites were successfully synthesized by hydrothermal method. Electrosorption experiments show that ZAC@VS 2 material presents the remarkable saturated adsorption capacity to lead(II) ions (239.52 mg/g) in the 500 mg/L PbCl 2 solution. In the triplex blend system (Fe 3+ /Pb 2+ /Na + ) with each solute density of 100 mg/L, the saturated adsorption efficiency of 85.4% to Pb 2+ can still be maintained. In addition, compared with the Langmuir(R 2 =0.873) adsorption isotherm model, the Freundlich model (R 2 =0.922) can be better used to fit the adsorption process, which proves that the adsorption process is multilayered and heterogeneous. XPS tests and competitive adsorption experiments show that the electric double layer (EDL) and complexation together promote the selective adsorption of heavy metal ions by ZAC@VS 2 . ZAC@VS 2 composite electrode shows excellent performance in the removal of lead ions in battery waste liquid, indicating the potential of introducing ZAC@VS 2 into CDI to remove lead ions.
研究领域:
环境科学
·
材料科学
·
水处理技术
·
重金属污染控制
·
电化学工程
✓ 已验证
DOI
高影响因子
Battery Energy
·
2024
·
IF 9
Lu Wang,Hao Dang,Tianqi He,Rui Liu,Rui Wang,Fen Ran
As a typical representative of vanadium-based sulfides, vanadium disulfide has attracted the attention of researchers ascribed to its high theoretical capacity and unique crystal structure. However, overcoming its structural collapse while achieving dual functionalization that serves as both active material and binder remains challenging. This study designs a dopamine-coating vanadium disulfide core-shell structure through the synergistic effect of V-O bonds and hydrogen bonds between vanadium disulfide and dopamine, which is further employed as a dual-function electrode material. The polydopamine-coated vanadium disulfide without binder exhibits specific capacity of 682.03 mAh g −1 , and the Coulombic efficiency of 99.78% at a current density of 200 mA g −1 after 400 cycles. More importantly, at a larger current density of 1000 mA g −1 , the specific capacity is 385.44 mAh g −1 after 1500 cycles. After 3150 cycles, the specific capacity is 200.32 mAh g −1 at 2000 mA g −1 . Electrochemical kinetics analysis displays that the polydopamine-coated vanadium disulfide without binder exhibits fast ion-diffusion kinetics, with the order of magnitude of ion-diffusion coefficients ranging from 10 −11 to 10 −12 . This kind of material has the potential to be a significantly promising electrode material for “fast-charging” lithium-ion batteries. Highlights A polydopamine-coated vanadium disulfide (VS 2 @PDA) core-shell structure is designed through the combined action of hydrogen bonding and covalent bonding. The VS 2 @PDA acts as a binder, which not only stabilizes the structure but also successfully buffers the volume effect of vanadium disulfide. Compared with vanadium disulfide, polydopamine units store more lithium ions, which is more conducive to Li + storage. The VS 2 @PDAN demonstrated excellent electrochemical performance (a specific capacity of 385.44 mAh g −1 at 1000 mA g −1 for 1500 cycles).
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
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jingwei Wang,Yaoyong Dong,Xuejun Zheng,Bei long,Hui Ling,Long Xie,Zhenhua Xiang,Wenyuan He
This report reveals that the hydrogen evolution activity of VS 2 can be effectively strengthened by inducing the surface charge redistribution of VS 2 via P non-metal doping. The XRD, TEM, GPA, EDS and XPS characterizations confirm that the P atoms are successfully doped into the VS 2 /CC matrix by substituting S atoms, resulting in lattice tensile strain and charge redistribution. The optimal P-doped VS 2 on carbon cloth (P-VS 2 /CC) exhibits a low overpotential of 274 mV at − 50 mA cm −2 and a small Tafel slope of 65.4 mV dec -1 , much lower than those of VS 2 /CC counterpart (622 mV and 120.1 mV dec −1 , respectively). Moreover, the P-VS 2 /CC delivers a long-term stability for 55 h without decay at 10 mA cm −2 , outperforming the VS 2 /CC. Density functional theory calculations suggest that P doping can induce the charge transfer from S and V to nearby P atoms, resulting in the decrease of hydrogen adsorption free energy at the S and V sites and the increase of total density of states at the Fermi level, thus far super hydrogen evolution activity. This work provides a hopeful new route for strengthening the HER activity of VS 2 , and offers a new perspective for developing advanced transition-metal chalcogenides electrocatalysts.
研究领域:
材料科学
·
电化学
·
纳米催化
·
能源材料
·
计算材料学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2023
·
IF 3
Liang Wu,Xingwu Zhai,Hang Wang,Hui Zhang,Zhongda Chen,Zhixin Sun,Min Zhou
An interlayer-expanded vanadium disulfide (VS 2 ) electrode has been developed to enhance the performance of sodium ion batteries. The interlayer expansion of the (0 0 1) plane from the standard 5.7 Å to 9.5 Å improves capacity by 2–3 times at various current densities even over long cycles. This advancement is credited to the optimized kinetics of Na + diffusion, as the intrinsic structure of VS 2 with weak van der Waals interlayer interactions leads to minimal resistance along 2D ionic diffusion routes. Our findings highlight the significance of interlayer engineering in designing efficient energy storage electrodes.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2015
·Vol. 3
·期 41
·8180-8187
·
IF 4.726
Ke-Jing Huang,Yu-Jie Liu,Qiu-Fen Zhai
Recently, two-dimensional layered transition metal dichalcogenide materials have been very fascinating in electrochemical fields due to their unique electronic and electrochemical properties. In the present work, a novel VS2–graphene (VS2–GR) composite is firstly prepared by a facile one-step hydrothermal method. A sensitive, universal and label-free electrochemical aptamer-based sensor (aptasensor) is then designed to detect the platelet-derived growth factor BB (PDGF-BB) based on VS2–GR coupled with Exo III-aided autocatalytic signal amplification. In the absence of PDGE-BB, the aptamer hybridized with the complementary DNA (cDNA) and the single-strand signal DNA labeled with biotin at 5′ end cannot be cleaved by the Exo III. When the above mixture is applied on the tetrahedron-structured probe (T-DNA) modified AuNP/VS2–GR electrode, signal DNA hybridizes with the protruding of T-DNA and a large number of avidin-HRP are adsorbed on the modified electrode by the specific binding of avidin–biotin, which leads to a strong current response by the catalysis of HRP to the mixture of hydrogen peroxide and hydroquinone (H2O2 + HQ). However, in the presence of PDGF-BB, the aptamer is preferentially associated with PDGF-BB, which facilitates the formation of double-strand DNA between cDNA and signal DNA. The duplex DNA is digested by Exo III from the 3′ blunt terminus of signal DNA and the cDNA is released. The liberative cDNA then reacts with the remaining signal DNA in the solution to perform a new cleavage process. Finally, the cyclic hybridization–hydrolysis process leads to a great decrease of biotin on the electrode, thus reducing the quantity of signal molecule HRP and causing an obvious decline of current response. This proposed protocol exhibits high specificity, good sensitivity, and good stability for PDGF-BB detection. Moreover, the aptasensor can be applied as a universal assay for the detection of various targets including proteins, DNAs, and metal ions.
研究领域:
材料科学
·
电化学
·
生物传感
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
ENERGY CONVERSION AND MANAGEMENT
·
2022
·
IF 11.533
Zechang Wei,Chenyang Cai,Yu Fu
To reach global carbon neutralization, the use of clean energy and biomaterials has become a trend to reduce CO 2 emission. With the increasing concerns about freshwater shortage and crude oil pollution, water purification and sewage treatment have become particularly urgent. Solar energy is an environment-friendly energy to mitigate freshwater shortage stress and reduce crude oil pollution. However, how to make solar energy applied to effectively drive freshwater generation and crude oil pollution remedy is crucial. Herein, the electrospun membrane was explored as sustainable matrix with desirable solar-to-thermal performance. The strategy of spectrum-tailoring was proposed to tailor bandgap energy of vanadium disulfide (VS 2 ) for photothermal conversion promotion and interfacial evaporation efficiency. Inspired by mussel, dopamine was polymerized on surface of VS 2 (VS 2 @PDA) for spectrum tailoring (Solar absorptance, α, is 89.34 %). Bandgap energy of the complex favorably decreased from 2.06 to 1.41 eV. Combining the dual H-bonding networks, water evaporation enthalpy of the membranes dramatically decreased from 2370 to 1990.2 J/g and the resulted evaporators showed excellent salt resistance, with evaporation rate of 1.40 kg m -2 h −1 (enhancement factor is 2.032) and extraordinary cyclic evaporation performance. Additionally, sunflower-inspired tilting model was architectured to eliminate disturbance of sun irradiation incident angles for effective solar-driven interfacial generation. The resulted membrane effectively treated the seawater and decreased high viscosity of the super-viscous crude oil under the sun irradiation, thus showing great potential in seawater treatment and crude oil pollution remedy. The designs maximized utilization of solar energy and evaporation rates by treating seawater and reducing crude oil pollution without consuming additional energy, thus contributing to carbon neutralization. Therefore, the integration of dual H-bonding networks and spectrum-tailoring strategies would facilitate the structure-functional unification and desirable photothermal capabilities, and bring about an application potential in the development of composite evaporators for carbon neutralization.
研究领域:
材料科学
·
环境科学
·
能源科学
·
化学工程
·
可持续技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）