Catalysts
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2022
·Vol. 12
·期 5
·549
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IF 4.501
Li Wang,Junbo Wang,Heping Cheng,Xiangxiang Zhou,Zhen Ma
A series of Ce1−xFexVO4(x = 0, 0.25, 0.50, 0.75, 1) catalysts prepared by modified hydrothermal synthesis were used for selective catalytic reduction (SCR) of NOxwith NH3. Among them, Ce0.5Fe0.5VO4showed the highest catalytic activity. The catalysts were characterized by X-ray diffraction (XRD), N2adsorption–desorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray fluorescence (XRF), X-ray photoelectron spectroscopy (XPS), temperature-programmed reduction using H2(H2-TPR), and temperature-programmed desorption of NH3(NH3-TPD). The results indicated the formation of Ce-Fe-V-O solid solutions. The average oxidation states (AOS) of Ce, Fe, V, and O atoms changed obviously with the incorporation of Fe3+into CeVO4, and the acidity of Ce0.5Fe0.5VO4differs from that of CeVO4and FeVO4. The presence of more acid sites and a sharp increase in active oxygen species in Ce0.5Fe0.5VO4effectively improved the selective catalytic reduction (SCR) activity.Keywords:selective catalytic reduction;nitrogen oxides;cerium vanadate;iron vanadate;cerium-iron vanadate
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
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yining Ma,Guangyao Sun,Xinyu Meng,Keyu Shi,Chenxu Ge,Di Wu,Shidong Ji,Xun Cao
The application of fluorescent powders to latent fingerprints development can enhance the contrast and minimize background interference, resulting in high-quality fingerprint images. In this study, two metavanadate phosphors, CsVO 3 and RbVO 3 , were successfully prepared via solid-state methods, and their fluorescence properties were investigated. When employed for latent fingerprints detection, both CsVO 3 and RbVO 3 exhibited well-defined and distinct papillary ridges of the fingerprint patterns with clear detailed features on various objects with different background interferences, including impermeable substrates, semipermeable materials as well as permeable paper. Additionally, the color of the visualized fingerprint images could be adjusted from yellow to green by changing the wavelength of ultraviolet light from 365 nm to 254 nm, demonstrating greater adaptability and flexibility of CsVO 3 and RbVO 3 . Overall, both powders exhibited remarkable sensitivity, selectivity, and contrast with minimal background interference, revealing the potential of CsVO 3 and RbVO 3 for latent fingerprints development.
研究领域:
法医学
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材料科学
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Ling Yu,Hui Wang,Qi Huang,Hainan Liu,Qingkong Chen,Bojie Yuan,Qi Li,Xiaofei Zhao,Junwang Tang,Deqiang Zhao
A series of BiVO 4 /InVO 4 composites were synthesized by one-pot microwave method based on the ratio regulation of Bi/In. Consequently, the as-fabricated BiVO 4 /InVO 4 photocatalysts performed higher photocatalytic activities (100%) than pure InVO 4 and BiVO 4 . The prepared photocatalysts were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), UV–vis diffuse reflection spectroscopy (UV–vis DRS) and Fourier transform infrared spectra (FTIR). The results indicate the formation of BiVO 4 /InVO 4 and it possesses enhanced solar light absorption. The enhanced reduction rate is ascribed to the efficient separation of photogenerated charge carriers due to the heterojunction formed between BiVO 4 and InVO 4 . The possible photocatalytic mechanism of BiVO 4 /InVO 4 composite was also discussed in detail.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2019
·
IF 2.291
Kang Hua,Xiujuan Li,Zewei Fu,Dong Fang,Rui Bao,Jianhong Yi,Zhiping Luo
Manganese vanadate (Mn 2 V 2 O 7 ) nanosheets on titanium (Ti) foil are synthesized by a cation-exchange method using sodium vanadate nanowires as the precursor. By varying the cation-exchange time in manganese acetate (Mn(CH 3 COO) 2 ) aqueous solution, the tunable morphologies and chemical components of the samples are tested, compared and presented in detail. The evolution process contains cation-exchange of Mn 2+ and Na + , newly generated H + to dissolve vanadate, and precipitation manganese vanadate nanosheets on the original sodium vanadate nanowire surface. Furthermore, the thermal and crystal properties of the as-prepared nanosheets are evaluated by calcinations at different temperatures. The Mn 2 V 2 O 7 nanosheets obtained at 250 °C, which are used as electrode of lithium-ion battery, have the first discharge capacity of 1048.0 mAh g −1 at 50 mA g −1 . After 100 cycles, the residual capacity is more than 800 mAh g −1 .
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
DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 14
·4602-4608
·
IF 4.029
Aruuhan Bayaguud,JianDa Li,Shan She,Yongge Wei
A reaction strategy for the post-functionalization of hexavanadate derivatives is presented herein. In this study, five polyoxovanadate-based organic–inorganic hybrids TBA2[V6O13{(OCH2)3CCOO(CH2)15CH3}2] (2), TBA2[V6O13{(OCH2)3CCOO(CH2)8CHCH2}2] (3), TBA2[V6O13{(OCH2)3CCOOCH2CF3}2] (4), TBA2[V6O13{(OCH2)3CCOO(CH2CH2O)3CH3}2] (5), and TBA2[V6O13{(OCH2)3CCOO(CH2)12OH}2]·2CH3CH2OH (6) were successfully synthesized via esterification of carboxylic acid groups-containing TBA2[V6O13{(OCH2)3CCOOH}2] (1) with five alcohols possessing different functional groups. These hybrids were characterized by single crystal X-ray diffraction, IR, ESI-MS, 1H and 13C-NMR spectroscopies, and elemental analysis. Moreover, the formation of large vesicles was observed in a mixed solution of compound 2 due to its surfactant-like structure.
研究领域:
无机化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 11
·1931
·
IF 5.719
Shaohong Zang,Xiaorong Cai,Mengshan Chen,Dehong Teng,Fei Jing,Zhe Leng,Yingtang Zhou,Feng Lin
Photocatalytic water splitting is one of the promising approaches to solving environmental problems and energy crises. However, the sluggish 4e−transfer kinetics in water oxidation half-reaction restricts the 2e−reduction efficiency in photocatalytic water splitting. Herein, cobalt vanadate-decorated polymeric carbon nitride (named CoVO/PCN) was constructed to mediate the carrier kinetic process in a photocatalytic water oxidation reaction (WOR). The photocatalysts were well-characterized by various physicochemical techniques such as XRD, FT-IR, TEM, and XPS. Under UV and visible light irradiation, the O2evolution rate of optimized 3wt% CoVO/PCN reached 467 and 200 μmol h−1g−1, which were about 6.5 and 5.9 times higher than that of PCN, respectively. Electrochemical tests and PL results reveal that the recombination of photogenerated carriers on PCN is effectively suppressed and the kinetics of WOR is significantly enhanced after CoVO introduction. This work highlights key features of the tuning carrier kinetics of PCN using charge-conducting materials, which should be the basis for the further development of photocatalytic O2reactions.Keywords:photocatalysis;water oxidation;cobalt vanadates;polymeric carbon nitride
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Ling-Ling Zheng,Lei Tian,Dengke Wang,Ying Chen,Qian-Qian Tang,Qiu-Ju Xing,Xiao-Zhen Liu,Dai-She Wu,Jian-Ping Zou
Highly efficient and synergetic adsorption and activation of persulfate are the main challenges of the persulfate-based advanced oxidation processes. Herein, we synthesized a series of BiVO 4 -X with tunable ratios of (0 1 0)/(1 1 0) co-exposing facet to remove the sulfamethoxazole (SMX) via the regulation of adsorption and activation of peroxydisulfate (PDS). Under visible light, the BiVO 4 -2 with the (0 1 0)/(1 1 0) co-exposing facet ratios of 1.5 can efficiently remove 95.71% SMX in 120 min. Based on the PDS adsorption concentration-texture coefficient model (C-TC), Density functional theory (DFT) calculation and relevant experiments, we confirm the top (0 1 0) facet of BiVO 4 -X can act as the reactive plane to adsorb the PDS via a hanging method. And the photo/electrochemical tests show the facet-dependent internal charge transfer from the (1 1 0) to the activated (0 1 0) facet in the BiVO 4 -X. Finally, we propose the synergistic mechanism of adsorption and activation of PDS via the BiVO 4 -X for organic pollutants degradation. This work develops a new method to precisely regulate the co-exposed facets of crystal materials and illuminates the synergetic mechanism of the simultaneous adsorption and activation of PDS via the regulation of co-exposing facets of the BiVO 4 in the persulfate activation system.
研究领域:
材料科学
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环境科学
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高影响因子
Catalysis Science & Technology
·
2021
·Vol. 11
·期 17
·5931-5937
·
IF 6.119
Danlei Wei,Lianqi Huang,Hanying Liang,Junhua Zou,Wenwen Chen,Can Yang,Yidong Hou,Dandan Zheng,Jinshui Zhang
Photocatalytic benzene hydroxylation reaction using a clean oxidant such as H2O2 is a green synthetic approach for phenol synthesis. Here, our study shows that silylated iron vanadate (FeVO4) nanorods can function as promising photocatalysts to direct hydroxylation of benzene to phenol, by taking advantage of the unique benefits of covalently bonded organosilane (OS) groups to realize kinetic control of heterogeneous photocatalytic reactions. The grafting of OS functional groups on FeVO4 helps to tailor its surface affinity to fine-tune the benzene adsorption behavior and photo-Fenton process for H2O2 activation. In addition, the OS groups immobilized on the FeVO4 surface via a rather strong Si–O bond also serve as an effective protective coating to suppress metal leaching, thus affording FeVO4 with an excellent stability to undergo a heterogeneous photo-Fenton process. As a result, the silylated FeVO4 exhibits robust photocatalytic benzene hydroxylation performance. The phenol yield and selectivity obtained on the optimized silylated FeVO4 are determined to be 20% and 98%, much better than that obtained from pristine FeVO4. Benefiting from its robust stability and tunable surface affinity, the silylated FeVO4 will have broad applications in photocatalytic selective oxidation to produce fine chemicals.
研究领域:
材料科学
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环境化学
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催化化学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Jialin Qiu,Ye’an Zhu,Bo Wang,Yidan Nie,Zengkai Song,Peng Li,Zongbo Xie,Zhanggao Le
Photocatalytic removal of hexavalent uranium is an effective method for reducing radioactive uranium contamination in water. Herein, novel heterojunction catalysts, bismuth vanadate/hydrothermal carbon nitride (BiVO 4 /HCN), were synthesized and firstly successfully implemented for uranium removal. For example, the removal rate of U(VI) over 0.10BiVO 4 /HCN reached 98.5 % for the first time and more than 95.9 % for five consecutive cycles. Subsequent characterization analyzes confirmed that increased specific surface area, redshift of the absorption band, and efficient charge separation of the photogenerated electron-hole pairs collectively contributed to the improved photocatalytic performance. Noteworthily, free radical quenching and electron spin resonance spectroscopy results indicate that holes, photogenerated electrons, and superoxide radicals are the major active species for the photoreduction of U(VI). Finally, a possible photocatalytic mechanism of U(VI) removal was proposed.
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
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Tingyu Wang,Han Luo,Shunke Zhang,Ling Huang,Liling Cao,Xuehua Dong,Guohong Zou
Two tellurium(IV) vanadates, KTeOVO4 and Ca2TeV2O9, were synthesized by integrating Te4+ with lone-pair of electrons and V5+ exhibiting the second-order Jahn–Teller effect (SOJT) active centers. Both compounds feature unique one-dimensional chain structures formed by [TeO4] and [VOx] polyhedra, resulting in notable birefringence values of 0.162 and 0.128 at 546 nm, respectively, higher than those of commonly used materials like α-BaB2O4 (0.116@1064 nm) and LiNbO3 (0.074@1440 nm). Additionally, they demonstrate excellent thermal stability (up to 500 and 700 °C) and broad transparency ranges (0.39–10.00 μm and 0.53–10.68 μm), enabling potential applications in near- and mid-infrared optical devices. Structural and theoretical analyses reveal that the enhanced birefringence arises from the synergistic effects of Te4+ lone-pair electrons and the anisotropic polarizability of V5+ centers.
研究领域:
材料科学
·
光学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2025
·
IF 2.1
Honglin Xu,Ruilin Wang,Yongsheng Deng,Guofeng Dou,Xinyu Wang
The stable phase equilibrium of the reciprocal quaternary system of Na+, K+//VO3–, Cl––H2O at 298.15 K was investigated by an isothermal solution equilibrium method. The equilibrium liquid phase solubility data and physical property data [density (ρ), refractive index (nD), and pH] were determined, and the composition of the equilibrium solid phase was verified by X-ray diffraction. The phase diagram and physical property–composition diagrams were constructed based on the equilibrium solubility data and physical property data. The phase diagram contains three invariant points, seven isothermal univariant curves, and five crystalline phase regions. The study found that this quaternary system belongs to a complex system with the presence of the double salts. By comparing the experimental results with literature data, it was confirmed that at 298.15 K, the chemical formulas of the complex salt which formed by the quaternary system Na+, K+//VO3–, Cl––H2O were consistent with the complex salt chemical formula (Na2mKn(VO3)2m+n) proposed by the Druzynski group, thus verifying the reliability of this experiment. The results of this study will provide new experimental data for the thermodynamics of vanadium–water systems.
研究领域:
物理化学
·
无机化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Yang Song,Yifei Geng,Ziyu Peng,Qingjun Zhu,Siping Liang,Yuehua Li,Jing Zhu,Yongguang Liu,Lei Dai,Zhangxing He,Ling Wang
For its high specific discharge capacity and low working voltage, lithium vanadate is considered a promising anode material . However, inherent low conductivity and unsatisfactory cycle performance limit its further application. In this work, doping at the V site does not destroy the crystal structure of lithium vanadate but also increases the lattice volume. Moreover, the increased content of oxygen defect in the presence of redox reaction effectively improves the electrochemical properties of lithium vanadate. At the same time, the enhancement of hydrophilicity effectively improves the migration rate of ions. Among all LiLa x V 3-x O 8 samples, LiLa 0.01 V 2.99 O 8 (LVO-La-10) demonstrates better rate and cycle performance. LVO-La-10 delivers specific discharge capacities of 93.5 mAh g 1 at 0.5 C, and 42.8 mAh g −1 at 7 C, which is 17.4 and 16.7 mAh g −1 larger than that of lithium vanadate, respectively. Moreover, the capacity retention rate of LVO-La-10 (87.8%) is still higher than that of lithium vanadate (75.8%) at the rate of 0.2 C after 100 cycles. This work exhibits that increasing the lattice volume and oxygen defect of lithium vanadate effectively improves its electrochemical performance.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
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