SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
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IF 8.6
Junfei Liu,Yue Zhang,Yingbo Dong,Zeyi Jiang,Liping Zhang,Wei Liu,Jing Guan,Hai Lin
In this study, a novel α-Fe 2 O 3 /V 2 O 5 /BC catalyst with high peroxymonosulfate (PMS) activation performance was constructed by co-pyrolysis method and 99.58% of tetracycline is degraded within 120 min. The electrons conversion of Fe-V on biochar surface induces the continuous generation of sulfate radical and singlet oxygen molecules ( 1 O 2 ). The XPS results show that it is Fe 3+ and Fe 0 rather than Fe 3+ and Fe 2+ in the iron cycle after the introduction of vanadium, indicating a more efficient electron transfer efficiency between interface. The optical properties characterization and density function theory calculation (DFT) of α-Fe 2 O 3 /V 2 O 5 /BC reveal that the electrons of the entire α-Fe 2 O 3 and the vanadium atoms are redistributed to new molecular orbitals due to strong interfacial chemical bonding, inducing a direct transfer of electrons to generate 1 O 2 for tetracycline removal that is the main cause of selective degradation. Besides, the possible degradation mechanism and tetracycline degradation pathways were also proposed. The α-Fe 2 O 3 /V 2 O 5 /BC maintains a high removal efficiency of tetracycline only decrease by 7.09% after six cycles. This study provides a better strategy and recyclable purification material for the efficient treatment of antibiotic pharmaceutical wastewater.
研究领域:
环境科学
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材料科学
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废水处理
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Hongying Liu,Mengying Wang,Xu Wang,Agnieszka Pawlicka,Xungang Diao
3D, porous, low-dimensional, and nanostructured V 2 O 5 films have significant potential for application in ECDs, but their development is still in its nascency. This paper reports a facile strategy of using PEG as a structure-directing agent and short-time heat treatments to obtain 3D, porous, and hierarchical V 2 O 5 films comprising interpenetrating stacked ultra-long nanowire surfaces and nanorod/nanosheet mixed interiors deposited on ITO-glass substrates. The mechanism of morphological transformation was studied in detail, and the analysis shows that the formation of such special structured films is a synergetic result of the guided intercalation of PEG, atomic rearrangement, Ostwald ripening, anisotropy of crystal growth, and orientation attachment mechanism. Among them, the preferred PEG addition amount of 25 % for the 350-3-V 2 O 5 film was applied in two types of all-solid-state ECDs: one using a gel quasi-solid electrolyte and the other using a solid-film electrolyte. The 350-3-V 2 O 5 film served as an ion storage coating and WO 3 was the electrochromic layer. These devices achieved ideal reversible switching of transmissive-to-black electrochromic characteristics. Notably, the ‘Integrated-Type’ ECD, composed of inorganic all-solid-state films, has a large optical modulation range ΔT = 72.0 %, rapid switching responses (colouration 25.4 s and bleaching 20.8 s), and sustained electrochromic performance.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2018
·
IF 3.779
Hongchun Mu,Jie Bai,Chunping Li,Weiyan Sun
Carbon nanofibers supported the vanadium and copper bimetallic oxide composite electrode material has been developed successfully in this study, as the outstanding electrode materials in supercapacitors . In electrospunning and calcination processes, the organic salt of vanadium underwent high temperature decomposition to form V 2 O 5 in situ. The various ratios of Cu x O-V 2 O 5 /CNFs composite electrode material were used to apply in the electrochemical performance testing through the vacuum impregnation method. Because of the copper doping, Cu x O-V 2 O 5 /CNFs (10:1) composites exhibited a specific capacitance of 867.2 F g −1 at 0.5 A g −1 over a potential range of 0–0.51 V, which surpassed those of their individual counterparts (682.5 F g −1 and 507.1 F g −1 at 0.5 A g −1 for V 2 O 5 /CNFs and CuCl 2 /CNF, respectively). The addition of trace copper oxide greatly improves the electrochemical performance of vanadium-based carbon fibers composites. The composites also showed good cycling stability due to the unique structure of the V 2 O 5 and synergies with copper oxide. The preparation route provided a novel strategy to synthesize composites of transition bimetallic oxide with improving electrochemical performance for applications in supercapacitors.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2022
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IF 5.477
Kaiwen Ni,Yuewang Peng,Geyu Dai,Huawang Zhao,Zhiwei Huang,Xiaomin Wu,Guohua Jing,Wei Feng,Ye Yuan
Background Ammonia bisulfate (ABS) deposition on the active sites of the catalyst surface is the main reason for SO 2 poisoning in low-temperature NH3-selective catalytic reduction (SCR). Accelerated ABS decomposition efficiently enhances the SO 2 resistance. Methods In this work, ceria was specifically chosen to decorate V 2 O 5 -WO 3 /TiO 2 catalyst (Ce-VW/Ti) to activate ABS decomposition in low-temperature NH 3 -SCR. Significant findings The optimal 7Ce-VW/Ti catalyst accelerated the decomposition of ABS and had superior SO 2 tolerance at 250°C. The additive CeO 2 improved the specific surface area and surface acidity, favoring the NH 3 -SCR catalytic activity. ABS was preferentially deposited on the additive CeO 2 on the surface of the 7Ce-VW/Ti catalyst and generated cerium sulfate, eventually protecting the active V 2 O 5 sites and TiO 2 support. Moreover, high quantity of V 5+ and charge transfer between active species V 2 O 5 and support TiO 2 could be maintained due to CeO 2 protection, subsequently maintaining the high NH 3 -SCR performance and enhancing the SO 2 tolerance.
研究领域:
催化
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环境科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Weiwei Wang,Rui Huang,He Peng,Ruiting Hu,Ling Ran,Yu Tao,Li Yani,Jun Yan
The emerging aqueous Zn-ion batteries (ZIBs) with their low price and inherent safety are showing strong competitiveness in the energy storage field. In this work, layer-by-layer stacked amorphous V 2 O 5 @Ti 3 C 2 T x heterostructures anchored on three-dimensional carbon cloth (3D CC), synthesized by annealing process and subsequent in-situ electrochemical induction, are reported as high capacity and stable cathode for ZIBs . In this composite cathode, amorphous V 2 O 5 @Ti 3 C 2 T x synergistic heterostructure provides isotropic Zn 2+ migration channels and rapid electron transfer kinetics, while the 3D CC substrate can ensure that the bulk phase in the electrode material is also utilized to maximize the synergistic effect. As a result, the CC/a-V 2 O 5 @Ti 3 C 2 Ti x cathode achieves a high specific capacity of 567 mAh/g at 0.1 A/g, a satisfactory rate performance of 213 mAh/g at 10 A/g, together with a long cycle life of 96.2 % capacity retention after 2000 cycles. Ex-situ characterizations show that the CC/a-V 2 O 5 @Ti 3 C 2 T x cathode undergoes a highly reversible Zn 2+ /H + co-intercalation/deintercalation mechanism during the discharge/charging process. In addition, based on the CC/a-V 2 O 5 @Ti 3 C 2 T x cathode, the assembled flexible ZIB can operate properly under different bending degrees, showing its practicality in flexible devices. This work provides insight into the rational design of cathode materials with high Zn-storage performance.
研究领域:
材料科学
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能源存储技术
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产品关联
DOI
PubMed
高影响因子
Molecular Catalysis
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2021
·
IF 5.062
Junyi Liu,Xianxiang Liu,Qiong Xu,Dulin Yin
A series of highly active and ortho -position selective catalysts based on (α-Fe 2 O 3 ) 1- x (V 2 O 5 ) x catalysts were proposed for the C -methylation of phenol with methanol. The (α-Fe 2 O 3 ) 1- x (V 2 O 5 ) x catalysts were synthesized by coprecipitation method of Fe and V elements and microwave drying. The chemical composition, material structure, acid-base properties, and structure-activity relationship of (α-Fe 2 O 3 ) 1- x (V 2 O 5 ) x catalysts were systematically analyzed by the techniques of XRD, XPS, TEM, N 2 adsorption-desorption, Raman, UV-Vis, ESR, NH 3 /CO 2 -TPD and Pyridine-IR. The (α-Fe 2 O 3 ) 1- x (V 2 O 5 ) x catalysts have the double advantages of high activity and high stability for the methylation of phenol due to the high BET surface area, large total pore volume, dispersive active sites and enhanced acid-base property. o -cresol and 2,6-xylenol were the main products, and nearly 100% selectivity to the ortho -position of phenol and 90% selectivity to o -cresol were obtained. Furthermore, the (α-Fe 2 O 3 ) 1- x (V 2 O 5 ) x catalysts possess long lifetime over 2500 h and high activity at a weight hourly space velocity of 1.6 h −1 compared with the microwave-dried α-Fe 2 O 3 catalyst. The doping of vanadium improves the activity and stability of α-Fe 2 O 3 catalyst, which attributes to the modification of catalyst structure, especially the improvement of acid-base centers and oxygen vacancy. Recently the (α-Fe 2 O 3 ) 1- x (V 2 O 5 ) x catalysts have been stably and efficiently applied in industry for the methylation of phenol.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
CARBON
·
2024
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IF 10.5
Xiang Li,Jindong Hu,Bitun Wang,Jinming Li,Ru Liu,Hongliang Liu,Honglei Fan,Zhiguo Li
Rechargeable aqueous zinc ion battery is a promising energy storage device owing to their appealing features with intrinsic safety, low cost, and scalability. However, since zinc ion is a divalent cation, it is difficult to find a cathode material that allows for the rapid and reversible insertion and extraction of zinc ions. Here, we proposed a coupling strategy to prepare capping V 2 O 5 /nano flower-like porous carbon-based zinc ion cathode materials for high electrochemical performance. Surprisingly, the interfacial coupling and transport effects between layered V 2 O 5 and nano flower-like porous carbon provided an interconnected three-dimensional network for highly efficient charge carriers thereby conferring efficient electron/ion transport. Among them, the nano flower-like porous carbon material increased the interfacial conductivity and layer spacing, and shortened the ion insertion and extraction channels due to the existence of pores. Meantime, the layered V 2 O 5 provided transport pathways and abundant active sites for zinc ions, enabling rapid and reversible insertion/extraction of hydrated Zn 2+ . The composite cathode material exhibited excellent energy storage performance compared to individually assembled zinc-vanadium battery, including high capacity (244.4 mAh g −1 at 50 mA g −1 ), high energy density (171 Wh kg −1 ), as well as cycling stability of up to 7000 cycles with capacity retention rate of 92 %. Moreover, the zinc-vanadium battery showed excellent low-temperature performance (specific capacity value of 171 mAh g −1 and specific capacity retention of 70 % at −20 °C). This work provided a new avenue for the design and development of high-performance aqueous rechargeable zinc-ion energy storage devices.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2023
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IF 6.2
Qi Wang,Yongli Ding,Randy A. Dahlgren,Yue Sun,Jingjing Gu,Yuhao Li,Tingting Liu,Xuedong Wang
Total antioxidant capacity (TAC) can be evaluated by detecting the content of antioxidants , such as ascorbic acid , based on the enzyme-mimetic activity of nanomaterials . Herein, we fabricated a 3D-V 2 O 5 /NC nanocomposite using a self-templating strategy, which achieved ultrafine particles (∼2.5 nm), a porous carbon layer, large specific surface area (152.4 m 2 /g), N-doping and heterogeneous structure. The strong catalytic activity of 3D-V 2 O 5 /NC resulted from the integrated effect between the ultrafine structure of V 2 O 5 nanoparticles and the 3D porous nitrogen-doped carbon framework, effectively increasing the number of active sites. This nanozyme presented a higher catalytic activity than its components or precursors in the nanocomposite (e.g., VN/NC, NC, V 2 O 5 , and VO 2 /g-C 3 N 4 ). ROS scavenging experiments confirmed that the dual enzyme-like activity of 3D-V 2 O 5 /NC (catalase-like and oxidase-like) resulted from their co-participation of ‧O 2 − , h + and ‧OH, among which ‧O 2 − played a crucial role in the catalytic color reaction. By virtue of the 3D-V 2 O 5 /NC nanoenzyme activity and TMB as a chromogenic substrate, the mixed system of 3D-V 2 O 5 /NC + TMB + H 2 O 2 provided a low detection limit (0.03 μM) and suitable recovery (93.0–109.5%) for AA. Additionally, a smartphone-based colorimetric application was developed employing "Thing Identify" software to evaluate TAC in beverages. The colorimetric sensor and smartphone-detection platform provide a better or comparable analytical performance for TAC assessment in comparison to commercial ABTS test kits. The newly developed smartphone-based colorimetric platform presents several prominent advantageous, such as low cost, simple/rapid operation, and feasibility for outdoor use.
研究领域:
纳米材料科学
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生物化学
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分析化学
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产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2022
·Vol. 14
·期 33
·12013-12021
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IF 8.307
Bo Wang,Simin Dai,Zehao Zhu,Lin Hu,Zhen Su,Yingzhi Jin,Liukang Xiong,Jiasong Gao,Jun Wan,Zaifang Li,Liang Huang
Vanadium oxides represent a promising cathode material for aqueous zinc ion batteries (ZIBs) owing to their abundant valences and versatile cation-storage capacities. However, the sluggish Zn2+ diffusion kinetics in the V2O5 framework and poor intrinsic conductivity result in inferior rate capability and unsatisfactory cycling performance of the V2O5 cathode, and thus limits its commercial-scale deployment. Herein, a unique conducting polymer intercalation strategy is developed to optimize the ion/electron transport simultaneously based on the rational design of the composite structure and morphology. The poly(3,4-ethylenedioxythiophene) (PEDOT) intercalated V2O5 not only remarkably enlarges the interlayer distance for facile Zn2+ diffusion, but also diminishes the electron transport resistance by the π-conjugated structure of PEDOT. Additionally, the two-dimensional (2D) morphology enables shorter ion diffusion paths as well as a larger number of exposed sites for Zn2+ insertion. As a result, the PEDOT-intercalated V2O5 (PEDOT/V2O5) exhibits a good high-rate performance (154 mA h g−1 at an ultrahigh current density of 50 A g−1) and a long-term cycling life (maintains 170 mA h g−1 even after 2500 cycles at 30 A g−1). This universal strategy provides a design principle for constructing efficient Zn2+ and electron transport pathways within cathode materials, holding great potential for the development of high-performance and durable ZIB cathodes.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Yibo Zhang,Zhihua Li,Mengmei Liu,Jun Liu
Rechargeable aqueous zinc-ion batteries (ZIBs) have received considerable attention for large-scale energy storage applications due to the unique merits of high energy density, eco-friendliness and reliable safety. However, the development of high performance cathodes is still hampered by their inferior reversibility and sluggish Zn 2+ diffusion kinetics, resulting in insufficient rate capability and poor cycling performances. Herein, we employed a feasible “two-in-one” strategy to intercalate conductive polymer (polyaniline, PANI) as pillar molecules into the V-MOF-derived hierarchical porous V 2 O 5 (designated as PVO) and used as cathode for high-performance ZIBs. The high specific surface area and nanobelt-like porous structure endowed PVO with abundant accessible electrochemical active sites and shortened the electrons/ions transfer pathways, further delivering a high discharge capacity (489 mAh g −1 at 0.1 A g −1 and 97.2% capacity retention after 100 cycles). Meanwhile, the intercalation of PANI not only effectively expanded the Zn 2+ diffusion channels, but also improved the structural stability during cycling as “interlayer pillars”. More importantly, the introduction of PANI could enhance the conductivity of the overall structure and weaken the electrostatic interaction between Zn 2+ and PVO host, thereby suppressing the collapse of the layered structure. Accordingly, the obtained PVO cathode exhibited excellent rate capability (375 mAh g −1 at 5.0 A g −1 ) and satisfactory cycling stability (91.8% capacity retention after 2000 cycles at 8.0 A g −1 ). Moreover, the reversible Zn 2+ storage mechanism was further investigated by kinetics analysis and DFT calculations. These ideal results provide key insights into the design of MOF-based cathode materials for high-performance aqueous zinc ion batteries.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2020
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IF 3.784
Yongchao Fang,Xiufang Cui,Guo Jin,Erbao Liu,Dan Zhang,Xin Wen,Qingbo Mi
In this work, hot corrosion behavior of air plasma sprayed La 0.8 Ba 0.2 TiO 3-δ (LBT)-YSZ double-ceramic-layer thermal barrier coating exposed to Na 2 SO 4 + V 2 O 5 molten salt at 900 °C for 20 h was investigated. The phase characterization and microstructural evolution analysis of the coating was carried out after the hot corrosion test by using X-ray diffraction (XRD), scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). The results showed that the LBT-YSZ coating possessed excellent hot corrosion resistance compared with the conventional pure YSZ coating. The conventional pure YSZ coating was completely destroyed after the 10 h test due to the volume change resulting from the adverse phase transition. However, the situation for the LBT-YSZ coatings is completely opposite. The LBT-YSZ coating could prevent the YSZ interlayer underlying the LBT overlayer from densification for at least 20 h. In the LBT overlayer, the double-reaction-layer composed of under dense layer and upper porous layer was formed. In particular, the continuous dense layers with a thickness of ~100 μm formed after 10 h, effectively arresting further penetration of the molten salt. In addition, affected by the diffusion extent of SO 3 gas, the corrosion products of porous layer were composed of Ba 2 V 2 O 7 , LaVO 4 , TiO 2 and BaSO 4 , while those of dense layer consisted of Ba 2 V 2 O 7 , LaVO 4 and TiO 2 . The specific mechanism by which the corrosion reaction occurred was proposed based on Lewis acid-base rule and thermodynamics.
研究领域:
材料科学
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表面工程
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DOI
高影响因子
SOLID STATE SCIENCES
·
2021
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IF 3.059
Cong Huang,Jun Wang,Mengjun Li,Xiaofang Lei,Qiang Wu
The construction of Z-scheme systems is a valid strategy to effectively enhance photocatalytic property in the field of photocatalysis . In the present work, a novel Z-scheme V 2 O 5 /NH 2 -MIL-101(Fe) heterojunction photocatalyst was prepared via a simple one-pot solvothermal method for the first time. The phase structure, morphology and optical property of the as-prepared V 2 O 5 /NH 2 -MIL-101(Fe) composite were carried out by a series of characterizations. The photocatalytic property of V 2 O 5 /NH 2 -MIL-101(Fe) heterojunction photocatalyst was investigated by photodegrading tetracycline (TC) under ultraviolet–visible light irradiation. The systematic studies indicate that the obtained V 2 O 5 /NH 2 -MIL-101(Fe) heterojunction photocatalyst possesses superior photocatalytic performance toward TC removal. Furthermore, a Z-scheme photocatalytic degradation mechanism for TC over V 2 O 5 /NH 2 -MIL-101(Fe) composites was proposed. The results show that Z-scheme V 2 O 5 /NH 2 -MIL-101(Fe) heterojunction photocatalyst has potential application in the treatment of TC wastewater. This research will broaden the studies of NH 2 -MIL-101(Fe)-based Z-scheme photocatalysts.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）