JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Lanlan Yu,Ningning Liu,Baojun Liu,Fei Yu,Jie Ma
Cathode materials with high capacity and cyclic durability are urgently needed for capacitive deionization . Na 3 V 2 (PO 4 ) 3 is an emerging pseudocapacitive candidate for this process on account of its high capacity and Na + reversible insertion, while it suffers from the intrinsic low electrical conductivity and small electrolyte-accessible surface area. Herein, a sea urchin-like Na 3 V 2 (PO 4 ) 3 @carbon (NVP@C) compound material was synthesized from MXene-V 2 C via hydrothermal method followed by annealing treatment, and then assembled as capacitive deionization (CDI) electrode material . Benefiting from three-dimensional sea urchin-like structure, where the nanoneedles of NVP@C serve as fast transport channel for Na + , NVP@C performed high specific capacity (437 F g −1 at 5 mV s −1 ) and fast ionic diffusion kinetics. Moreover, the NVP@C showed attractive desalination performance as cathode material for CDI, achieving a remarkable adsorption capacity of 74.0 mg g −1 in a NaCl salt solution (1000 mg L −1 ) and long life cycle stability. The present work provides a novel perspective to construct practical redox-active and stable CDI electrode with 3D structure from MXene for highly capacitive and durable desalination application .
研究领域:
材料科学
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电化学
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环境工程
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能源存储
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纳米材料
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水处理技术
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DOI
高影响因子
Materials Today Energy
·
2023
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IF 9.3
Fangyuan Zhang,Xueli Zhang,Shan Hu,Huilin Hu,Jinhua Ye,Defa Wang
Photothermal catalytic carbon dioxide (CO 2 ) reduction has attracted increasing research attention as a promising method for recycling CO 2 and producing renewable energy. However, it remains a challenge in the improvement of catalytic activity with regulated product selectivity in view of practical applications. Herein, we develop the two-dimensional layered V 2 C MXene (VC) supported Ni nanoparticle and NiO nanosheet (Ni@NiO/VC) composite as an efficient catalyst for selective photothermal reduction of CO 2 to CH 4 . The optimal 0.8Ni@NiO/VC catalyst exhibits 48.1 % CO 2 conversion with an evolution rate of 33.2 mmol/g cat /h and 99.2 % selectivity for CH 4 production under a 300 W full-arc xenon lamp irradiation. Moreover, a long-term cyclic photothermal CO 2 reduction reaction demonstrates the excellent stability of 0.8Ni@NiO/VC. The enhanced photothermal CO 2 reduction activity with a high CH 4 selectivity could be attributed to the large specific surface area and excellent photothermal effect of V 2 C MXene, and the synergistic effect of Ni and NiO on adsorption/activation of H 2 and CO 2 molecules. This work provides a feasible strategy for the construction of efficient photothermal CO 2 reduction catalyst by properly incorporating transition metal nanoparticles and metal oxide with a suitable MXene.
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Shaobin Li,Yufeng Jiang,Jingwei Liang,Li Zhang,Fengbo Li,Xiaoqing Lv
s The development of the efficient bifunctional hydrolysis electrocatalyst is of great significance. In this work, N, Ce co-doped CoO nanoparticles (NPs) in-situ growing few-layer V 2 C-MXene interfacial structure (N, Ce-CoO NPs/MXene) has been developed as self-supporting electrodes for hydrogen production by interfacial engineering strategy. The integration of nanoparticles into the composite effectively mitigates the tendency of few-layer MXene sheets to undergo self-stacking, while simultaneously introducing a significant number of heterogeneous interfaces. The simultaneous doping of two distinct atoms modulates the electronic configuration of the active sites at heterogeneous interfaces, thereby enhancing the electron transfer processes occurring between the interfaces. The N, Ce-CoO NPs/MXene electrocatalysts exhibit excellent performance in both urea oxidation reaction (UOR) and hydrogen evolution reaction (HER), reaching 1.33 V and 86 mV at 10 mA cm −2 . The N, Ce-CoO NPs/MXene as a bifunctional catalyst for urea-assisted electrolysis can reach 10 mA cm −2 at only 1.38 V with almost no performance degradation for 100 h. In-situ Raman spectroscopy reveals the main active sites of Co as a catalyst. Density functional theory (DFT) demonstrated that the N, Ce-CoO NPs/MXene interfacial catalysts facilitate electron transfer, thereby promoting the dissociation of urea molecules through the reorganization of electrons at the interface.
研究领域:
材料科学
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电催化
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能量存储与转换
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纳米材料
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物理化学
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产品关联
DOI
PubMed
高影响因子
DESALINATION
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2020
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IF 7.098
Baojun Liu,Lanlan Yu,Fei Yu,Jie Ma
Capacitive desalination (CDI) has aroused much attention due to its advantages of low energy consumption and environmental compatibility. However, typical CDI processes display limited efficiency. In this work, one-dimensional V 2 O 5 with nanocuboid structure was prepared with MXenes(V 2 C) precursor for the first time, which has high adsorption capacity, structure stability and fast ion diffusion ability. The as-synthesized V 2 O 5 electrode achieved a salt adsorption capacity(SAC) of 55.2 mg NaCl g −1 V 2 O 5 under optimized conditions with a constant current density of 30 mA g −1 , a voltage range from −0.6 to 1.2 V, and an initial solution of 500 mg L −1 NaCl. Furthermore, from the comprehensive analysis of mechanism, due to the high conductivity and low charge transfer resistance of V 2 O 5 electrode, it reduces the energy loss of the resistance during desalination. A particularly low energy consumption of 0.27 kWh kg −1 -NaCl is reached when the operation is carried out successfully at low voltage range, indicating the advantages of energy saving and high efficiency. Therefore, V 2 O 5 is an attractive and promising electrode material, which exhibits the potential of pseudocapacitive materials with certain structure for practical CDI application in future and inspires us to have a deep insight into the effect of morphology on the properties.
研究领域:
材料科学
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环境工程
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电化学
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纳米技术
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DOI
高影响因子
ANALYTICAL CHEMISTRY
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2024
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IF 6.7
Jin Wang,Yudan Shen,Yuting Zhuang,Jinyi Wang,Yue Zhang
The development of abiotic protein affinity adsorbents remains challenging for the accurate acquisition and analysis of specific protein species. Inspired by bacterial cell walls, a hierarchical hybrid framework is fabricated through the oriented growth of an Fe-based metal organic framework (MOF) on V2C MXene for the efficient separation of lysozyme (Lys). After directed evolution of adsorptive materials, the MXene@MOF composite rich in hydroxyl groups (termed as MX@MOF-DH) is found exerting exceptional affinity for Lys. Benefiting from hydrogen-bonding, coordination, and electrostatic interaction-mediated multimodal and multivalent affinity, MX@MOF-DH reveals rapid adsorption rate (5 min), superb enrichment factor (83.1), and favorable binding capacity (609.7 mg g–1), which outperforms other latest adsorbents. Moreover, femtomolar sensitivity is achieved even in the presence of high-abundant interfering proteins, as confirmed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometer analysis. This work not only provides an efficient approach for selective enrichment of lysozyme but also paves an avenue to construct the protein affinity reagents for specific biological medicine and analysis applications.
研究领域:
生物化学
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材料科学
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分析化学
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生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）