SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Yibing Xie,Huihui Wu,Jianfei Luo,Shao Zhang,Langlang Wang,Xueqian Wang,Yixing Ma,Ping Ning
The incorporation of vanadium during the synthesis process induced a spontaneous and complete thermal phase transition from α-Bi 2 O 3 to β-Bi 2 O 3 . This phase transition facilitated the development of intrinsic electric field at the interface between V 2 O 5 and β-Bi 2 O 3 , consequently establishing a novel carrier transfer pathway. As a result, the fabricated V 2 O 5 /β-Bi 2 O 3 heterojunction exhibited an outstanding removal efficiency of over 98 % for gaseous mercury (Hg 0 ) under UV light, and this efficiency of 95.0 % even after 35 h of testing. Introducing vanadium enhanced the light absorption capacity in the ultraviolet region and effectively separated photoinduced charge carriers. As revealed by density functional theory calculations, the photoinduced electron–hole transfer in the V 2 O 5 /β-Bi 2 O 3 heterojunction followed the Z-scheme mechanism. This mechanism significantly contributed to the long-term stability of photocatalytic Hg 0 removal, even when H 2 O and NO were present. This study presents a novel material composited by a thermal phase transition technique, aimed at the highly effective and green removal of Hg 0 in the environment.
研究领域:
环境科学
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材料科学
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化学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 16
·7704-7710
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IF 3.925
Yaqi Wang,Zhihu Pan,Xiaohong Ji
Among transition-metal oxides, vanadium oxides and iron oxides have attracted much attention for electrochemical energy storage devices due to their high theoretical specific capacities and multiple variable valence states of V and Fe. However, the poor conductivity of both oxides leads to poor rate performance and high charge transfer resistance between the electrolyte and electrodes. Herein, Ti3C2Tx-wrapped V2O5/Fe2O3 (VFO) composites were designed and prepared for achieving enhanced electrochemical performance. The VFO composites on carbon cloth were synthesized by a hydrothermal method, and the optimized VFO electrode exhibited a capacitance of 435.2 mF cm−2 at a current density of 2 mA cm−2. By wrapping with Ti3C2Tx, the areal capacitance of the VFO composite electrode was greatly enhanced up to 1150.82 mF cm−2 at a current density of 2 mA cm−2. The enhanced electrochemical performance of the Ti3C2Tx@VFO composites is mainly attributed to the synergistic effects of the improved conductivity and diminished collapse and falling off of VFO during the charging and discharging processes. For practical application, asymmetrical supercapacitor (ASC) MnO2//Ti3C2Tx@VFO devices were constructed. The device exhibited a maximum energy density of 0.17 mW h cm−2 at a power density of 1.26 mW cm−2 with a capacitance retention of 74.92% after 5000 cycles. This work indicates the potential application of various oxides in high-performance supercapacitors by modification with MXenes.
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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DOI
高影响因子
Journal of Environmental Chemical Engineering
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2022
·
IF 7.968
Bo Wang,Qiaowen Yang
Large amounts of spent selective catalytic reduction (SCR) catalysts were produced in industry after losing their activity. This study developed a clean and effective route of leaching and recovery of vanadium (V) from spent SCR catalyst. First, ascorbic acid (C 6 H 8 O 6 ) as the adjuvant can enhance vanadium leaching in H 2 SO 4 solution. The effect parameters of acid concentration, leaching temperature, leaching time and liquid-solid (L/S) ratio on the leaching efficiency of vanadium were investigated. Then, the enrichment of vanadium in the leachate to obtain the black cake was carried out through adjusting pH value. The effects of vanadium concentration and pH on the precipitation efficiency of vanadium were studied. Finally, after alkaline dissolution and oxidation of the black cake, ammonium chloride (NH 4 Cl) was selected and used as the precipitant to obtain the ammonium poly-vanadate (APV). The final product vanadium pentoxide (V 2 O 5 ) was obtained through roasting APV at 550 ℃ for 1.0 h. The black cake, APV and V 2 O 5 were analyzed by the characterization of XRD or XRF . This study may introduce a new perspective for the effective usage of vanadium from spent SCR catalyst.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
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IF 5.155
Youcai Ding,Yuqi Peng,Wenyong Chen,Yunjuan Niu,Shougang Wu,Xianxi Zhang,Linhua Hu
Rechargeable aqueous zinc-ion battery is a promising energy storage device because of its low cost and high safety. However, they are still in their infancy due to the limited choice of cathodes with high capacity and satisfactory cycling performance. In this work, porous V 2 O 5 materials were obtained by pyrolysis of vanadium-MOF and adopted as intercalation cathode for aqueous zinc-ion batteries . V 2 O 5 purchased commercially as a control, the effects of specific surface area, pore size distribution and mixed valence of electrodes on the performance of batteries were studied. The novel cathode delivers high capacities of 300 mA h g − 1 compared to 60 mAh g − 1 for C-V 2 O 5 at current density of 100 mA g − 1 . The energy density of this Zn ion battery is about 230 Wh kg − 1 , which is much higher than commercial lead acid batteries . The capacity of P-V 2 O 5 electrode retains 120 mA h g − 1 even at 2000 mA g − 1 , which is much higher than that of C-V 2 O 5 . Moreover, the structure of V 2 O 5 nanoplates and their composites with carbon materials can improve the cyclic stability.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
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2015
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IF 3.615
Jian Wang,Xue Wang,Xiaolong Liu,Junlin Zeng,Yangyang Guo,Tingyu Zhu
In this article, we present a detailed study combining the kinetic studies and in-situ FTIR experiments to investigate the oxidation behavior of chlorobenzene over V 2 O 5 /TiO 2 catalysts. The catalytic data show the 3–5 wt.% V 2 O 5 /TiO 2 catalysts are best fit for the oxidation of chlorobenzene. The calculated apparent reaction orders are about 0.6 and 0.2, respectively. The results of in-situ FTIR provided mechanism insights into the catalytic reaction, which supports the following proposal: (i) a nucleophilic substitution on V O species and (ii) attacking by surface oxygen through a electrophilic substitution, then (iii) followed by the cracking of ring structure, and further oxidation of the resulting species to form final products. The above results further suggest that the nucleophilic substitution process and surface reaction are kinetically significant steps for chlorobenzene oxidation, determining the overall rate of the reaction. Furthermore, 1,2-dichlorobenzene, 1,3-dichlorobenzene and 1,2,4-trichlorobenzene as additional reactants were tested together with chlorobenzene in binary mixtures to examine their competition reactions.
研究领域:
环境科学
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催化化学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Jianhua Zheng,Lei Zhang
3-D hollow sphere-like Ni 3 V 2 O 8 immobilizing V 2 O 5 nanoparticles were successfully synthesized via in situ recrystallization method without any template. The compact contact between V 2 O 5 and Ni 3 V 2 O 8 ensuring the photo-inducted carriers fast transport, which would be beneficial for inhibiting recombination rate of electron-hole ( e - /h + ) pairs. Moreover, the hollow sphere-like structure composed of the smaller nanoparticle could effectively improve of visible light capture capacity (multiple scattering for hollow architectures). Benefiting the synergistic promoting effect of the suitable heterojunction and the fascinating 3D hollow feature, the V 2 O 5 @Ni 3 V 2 O 8 indicated significantly degradation performance when evaluated as photocatalyst for degradation antibiotics and chlorophenols under visible light irradiation. Impressively, the 2-V 2 O 5 @Ni 3 V 2 O 8 heterojunction deliver the optimal degradation efficiency for TC (OTC) and 2,4-DCP (4-CP) were 90.0% (~ 91.2%) and 92.6% (~ 90.0%), respectively. The appearance mechanism for the enhancement photocatalytic performance was also elucidated in detail. The facile strategy provides a novel insight into the designing of the photocatalyst with advantages of charges separation and light-harvesting for degradation of contaminants in wastewater.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
PubMed
高影响因子
Sustainable Energy & Fuels
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2025
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IF 4.1
Jingwen Li,Mingqiang Li,Shuailiang Xu,Haochen Weng
Chloride-ion batteries (CIBs) possess high theoretical energy densities and are promising successors to lithium ion batteries. In this study, we present a novel MnO2@V2O5@C cathode design. We introduced a water-in-salt system into the battery, which effectively solved the safety problem. This battery offered the advantages of high performance, low weight, low cost, high flexibility and enhanced safety. Furthermore, it achieved a discharge platform of up to 2.6 V, a maximum discharge capacity of 457.4 mA h g−1, and a cycle life of 1000. The cathode was lightweight, weighing only 0.02 g, and the battery used fewer materials, making it less expensive. It could be arbitrarily folded, punctured and burned (1300 °C) without explosion, and it could be operated normally before complete destruction. Thus, aqueous CIBs exhibit high safety. These advantages make this new type of chloride-ion battery a potential candidate for applications in automotive, portable devices, aerospace and other fields, and it opens a new path for the development of batteries.
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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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2020
·Vol. 27
·期 24
·30243-30253
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IF 3.056
Xu Wenqing,Gao Lei,Yang Yang,Zhu Tingyu,Qi Guisheng
The deposition of NH 4 HSO 4 on catalysts is one of the key issues for selective catalytic reduction of NO x . In this study, NH 4 HSO 4 was preloaded on catalysts, and the effects of MoO 3 and CeO 2 doping on the decomposition and reactivity of NH 4 HSO 4 on V 2 O 5 /TiO 2 catalysts are studied. The results show that the introduction of MoO 3 and CeO 2 significantly promoted NO x conversion on the V 2 O 5 /TiO 2 catalysts. Doping with MoO 3 could effectively enhance the S and H 2 O resistance of the catalysts. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analysis indicate that it is the strong chemical interactions between NH 4 HSO 4 and the catalysts that are adverse to the decomposition of NH 4 HSO 4 . However, doping with MoO 3 apparently inhibits these interactions, which significantly decrease the decomposition temperature of NH 4 HSO 4 . In situ FTIR experiments show that the NH 4 + in preloaded NH 4 HSO 4 could react with gaseous NO on catalysts, and doping with MoO 3 could facilitate the reaction rate.
研究领域:
环境科学
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催化化学
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DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
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2022
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IF 9.794
Fan Zhao,Siqi Gong,Huiting Xu,Meng Li,Lina Li,Junjie Qi,Honghai Wang,Zhiying Wang,Yuqi Hu,Xiaobin Fan,Chunli Li,Jiapeng Liu
Rechargeable aqueous zinc-ion batteries are emerged as fascinating “beyond Li-ion” battery technologies for large-scale energy storage due to low cost, high theoretical capacity, high safety and environmental friendliness . However, developing cathode materials with outstanding electrochemical performance are prerequisites. Herein, the a-V 2 O 5 @Ti 3 C 2 T x heterostructure is prepared by in situ incorporating amorphous V 2 O 5 with Ti 3 C 2 T x MXene to enhance the rechargeable aqueous Zn-ion batteries performance. Benefitting from the distinctive amorphous structure of a-V 2 O 5 , outstanding conductivity of Ti 3 C 2 T x MXene and the strong synergistic effect between two components, the a-V 2 O 5 @Ti 3 C 2 T x heterostructure presents isotropic ion diffusion paths , plentiful ion storage sites and splendid conductivity. As a consequence, the a-V 2 O 5 @Ti 3 C 2 T x heterostructure displays excellent specific capacity of 544 mAh g −1 at 0.5 A g −1 and outstanding rate performance. Particularly, even at a fairly high current density of 30 A g −1 , the a-V 2 O 5 @Ti 3 C 2 T x heterostructure shows an impressive specific capacity of 135 mAh g −1 along with about 100% coulombic efficiency after 1000 cycles. Furthermore, the mechanism related is expounded via comprehensive characterizations. Therefore, this work offers a way for developing high-performance vanadium-based cathode materials for aqueous zinc-ion batteries.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Journal of Materials Chemistry A
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2017
·Vol. 5
·期 14
·6522-6531
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IF 8.867
Yining Ma,Aibin Huang,Huaijuan Zhou,Shidong Ji,Shuming Zhang,Rong Li,Heliang Yao,Xun Cao,Ping Jin
Various V2O5 hierarchical structures were successfully synthesized via a template-free method by annealing diverse morphological VO2 sub-microspheres which can be facilely tailored by adjusting the solvothermal reaction duration. The VO2 sub-microspheres undergo a solid → yolk–shell → hollow → yolk–shell structure process with increasing time, which is believed to result from an unusual Ostwald-ripening process. After the annealing process, multi-structural VO2 sub-microspheres changed into hierarchical structures including fist-type structures consisting of nanorods, yolk–shell and hollow sub-microspheres composed of nanorods and a yolk–shell construction made up of nanoplates. As the cathode materials for lithium-ion batteries, among them, yolk–shell sub-microspheres comprised of nanoplates exhibited high reversible capacity, excellent cycling stability at high currents and good rate capacities. Without doping and compositing, the electrode delivered reversible capacities of 119.2 and 87.3 mA h g−1 at high current densities of 2400 and 3600 mA g−1, respectively, as well as a capacity retention of 78.31% after 80 cycles at 1200 mA g−1. The excellent electrochemical performance could be attributed to the purity of the phase and synergistic effect between the yolk–shell structure and hierarchical structure of the sub-microspheres, which make the yolk–shell V2O5 hierarchical structure a promising candidate for the cathode material for lithium-ion batteries.
研究领域:
材料科学
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能源科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Shuo Yang,Guangpeng Wu,Jing Zhang,Yuning Guo,Yushuang Chen,Yuanmin Zhu,Xiaofeng Zhang,Liujiang Zhou
Aqueous Zn-ion batteries (AZIBs) are considered as a promising energy storage device owing to their inherent safety, cost-effectiveness, and environment friendliness. However, their commercialization is hindered by critical challenges, including severe dendrite growth and poor electrochemical performance stemming from an inefficient cathode-electrolyte interaction, thus leading to inevitable short circuits and significant capacity decay. Herein, sec-butanol (SBT) is applied as a bifunctional electrolyte additive in a 1 M Zn(ClO 4 ) 2 aqueous electrolyte to achieve high-performance AZIBs. Profiting from the strong coordination and adsorption capabilities, SBT effectively reshapes the solvation structure of Zn 2+ ions in the electrolyte and inhibits the two-dimensional diffusion of Zn 2+ ions. Moreover, SBT also enhances the wettability of the electrolyte on the V 2 O 5 cathode, facilitating better electrode–electrolyte interactions. Benefiting from those positive effects, the Cu//Zn half cell with SBT demonstrates stable cycling performance over 1000 cycles at 5 mA cm −2 in the modified electrolyte, markedly outperforming cells with pure aqueous electrolyte. Most notably, the V 2 O 5 //Zn full battery achieves a remarkable capacity of 247.78 mAh g −1 at 4 A g −1 in the modified electrolyte, significantly surpassing the performance of systems without SBT.
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2025
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IF 26.8
Jiaxin Mao,Binhong Wu,Rui Hao
Microparticle cathode materials are widely used in secondary batteries. However, obtaining dynamic chemical heterogeneities of these microparticles is challenging, hindering in-depth mechanistic investigation of the underlying processes. For example, although vanadium pentoxide shows promise as an electrode material for zinc ion batteries, its poor performance's root cause is elusive. Herein, a fluorescence/scattering dual-mode spinning disk confocal microscopy-based approach is developed to visualize the 4D chemical heterogeneity of single V 2 O 5 particles during cycling. Dual-mode in situ imaging identifies valence state changes of vanadium ions with high spatiotemporal resolution. A unique difference is observed between the scattering intensities of a particle's bottom electric contact points and the rest parts during the discharging process. In contrast, fluorescence intensity variation suggests high consistency across the particles. Correlative Raman, UV–Vis spectroscopy, and electrochemical impedance spectroscopy analyses suggest the precipitation of V 3+ species at the bottom interface of the V 2 O 5 electrode, leading to increased electron transfer resistance and compromised overall performance. A coordination strategy between ethylene diamine tetraacetic acid and V 3+ is proposed for inhibiting V 3+ precipitation, and its effectiveness is further verified by imaging and electrochemical impedance spectroscopy analyses. Insights from the imaging approach presented herein will enable the rational design of high-performance batteries.
研究领域:
材料科学
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电化学
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显微成像技术
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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）