Journal of Energy Storage
·
2026
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IF 10.7
Chundong Geng,Xin Gao,Qian Li,Yanqiu Xie,Gang Liu,Haoze Wang,He Bai,Fan Jiang,Hongyan Yue
Although interlayer engineering strategies have demonstrated significant potential in enhancing the electrochemical performance of layered manganese vanadates, the role of intercalated crystal water in regulating charge storage behavior should be clarified. Herein, several manganese vanadates (MnV 2 O 6 ·nH 2 O) with different crystal water contents are fabricated, and the storage behaviors are investigated. When the content of crystal water is limited (n = 2), the interlayer crystal water can act as a “pillar” to enhance ion diffusion kinetics, optimize the interlayer charge distribution, and alleviate structural collapse during charge/discharge cycles. However, excessive water molecules (n = 4) can form metastable coordination configurations and induce localized structural damage during repeated charge/discharge processes. As a result, MnV 2 O 6 ·2H 2 O cathode material exhibits an optimal specific capacity (1318.2 C g −1 at 1 A g −1 ) and cycle stability (84.31% capacity retention after 10,000 cycles) better than that of MnV 2 O 6 (507.9 C g −1 at 1 A g −1 , capacity retention of 61.62%) and MnV 2 O 6 ·4H 2 O (591.3 C g −1 at 1 A g −1 , capacity retention of 67.64%). Furthermore, the hybrid supercapacitor assembled with MnV 2 O 6 ·2H 2 O cathode and activated carbon anode (MnV 2 O 6 ·2H 2 O//AC) demonstrates a superior energy density of 59.12 Wh kg −1 at 690.80 W kg −1 , with 87.03% of the original capacity remaining after 10,000 cycles.
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OPTICAL MATERIALS
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2020
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IF 2.779
Kai Xu,Qingtang Cui,Degao Zhong,Zhe Yu,Tianhua Wang,Lifeng Cao,Qibo Wang,Xiaolong Yu,Bing Teng
Research progress of an organic second-order nonlinear optical crystal 2-(4-(dimethylamino)styryl)-benzothiazole (DMASBT) was grown with slow cooling method and its performance characterization in different aspects were reported. It was found that the crystals had a high second harmonic generation efficiency of 9.8 times higher than that of KDP crystal. Crystal structure of the crystal was investigated by single crystal XRD . It was found that the crystal lattice is monoclinic . In addition, the crystal growth mechanism and intermolecular interaction were analyzed by chemical etching and Hirshfeld surface . The functional groups of the raw materials were determined by FT-IR, Raman, 1 H NMR and elemental analysis . UV–vis–NIR spectrum, dielectric properties under different frequencies, thermal stability, and photostability of the crystal in powder state were also studied.
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CARBOHYDRATE POLYMERS
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2019
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IF 6.044
Shuangyu Xiong,Luminita Marin,Lian Duan,Xinjian Cheng
Nitroaromatic compounds, especially 2, 4, 6-trinitrophenol, have strong biological toxicity and explosive risks, so the detection of 2, 4, 6-trinitrophenol exhibit importantly practical and scientific significance. In this work, three fluorescence functionalized chitosan CNS 3 , CNS 4 and CNS 5 were prepared using chitosan as matrix. When 2, 4, 6-trinitrophenol (TNP) and/or p-nitrophenol (4-NP) was present in spot, these fluorescent chitosan sensors produced notable fluorescence quenching. It renders the chitosan sensing ability to detect TNP and 4-NP selectively and sensitively. The sensing mechanism is investigated as well. When introduced electron-rich moieties to the fluorescent chitosan, the sensitive detecting ability could be obtained. Excellent recognition ability could reach as low as 0.28 μM. The fluorescence fictionalization cause slight influence to the gel performance of chitosan.
研究领域:
分析化学
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环境科学
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材料科学
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JOURNAL OF MOLECULAR CATALYSIS B-ENZYMATIC
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2013
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IF 2.823
Jian-Yong Zheng,Jia-Yu Wu,Yin-Jun Zhang,Zhao Wang
The mycelium of Aspergillus oryzae WZ007 was successfully developed to kinetic resolution of ( R , S )-ethyl-2-(4-hydroxyphenoxy) propanoate (( R , S )-EHPP) for production of ( R )-ethyl-2-(4-hydroxyphenoxy) propanoate (( R )-EHPP). The key biocatalytic process parameters (pH, temperature, rotation speed and substrate concentration) were optimized. Under the optimum conditions, the optical purity of ( R )-EHPP was improved up to >99% when the conversion was above 49%. A. oryzae WZ007 whole-cell lipase exhibited high reaction capacity, enantioselectivity and good reusability. The tolerable substrate concentration was 0.5 mol/L, and dry mycelium of A. oryzae WZ007 maintains over 80% of its initial activity after eight repeating cycles. Therefore the enzymatic preparation of ( R )-EHPP route was suitable for industrial application.
研究领域:
生物化学
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微生物学
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制药工程
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JOURNAL OF POLYMER SCIENCE
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2022
·Vol. 60
·期 9
·1468-1479
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IF 3.046
Ming Duan,Gang Wu,Tianbin Gu,Xiaohui Jiang,Lei Zhao,Limei Zhou,Yunwen Liao,Qiang Pu
Present work reports a new type of poly( N -alkyl-2-[4-hydroxybut-2-ynyl] pyridinium bromides) (designated as Po-n, n = 8, 12, 16 of carbon atoms in the alkyl chain). Po-n were synthesized and characterized by FTIR, GPC, and NMR analysis. The possible polymerization mechanism was proposed and supported by theoretic calculation. A preliminary probe was performed on the conductivity and anticorrosive ability of the conjugated polymer. The results showed that these polymers demonstrated poor conductivity, however the conductivity was enhanced by graphene doping. Po-n are good inhibitors for X70 steel corrosion in HCl solution. So, the conjugated polymers may play important roles in the fields of optoelectronic devices and steel corrosion inhibition. Graphical
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ANALYTICAL LETTERS
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2020
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IF 1.467
Yunlong Zhang,Ya Ma,Lishi Wang
A polyfurfural film and copper nanoparticle (Cu NP) modified glassy carbon electrode (GCE) was prepared for the electrochemical determination of 2,4,6-trinitrotoluene (TNT). The polyfurfural film and Cu NPs were prepared by a one-step electrochemical polymerization method and a one-step electrochemical deposition method, respectively. In order to obtain the optimum electrochemical performance, the degree of polymerization of furfural, the deposition time and deposition potential of copper, the enrichment time and enrichment potential of TNT detection, and the pH of the detection solution were optimized. Under the optimal experimental conditions, the modified glassy carbon electrode provided significantly enhanced electro-catalytic activity for TNT with a wide linear detection range from 0.05 to 6 ppm and a low detection limit of 0.0416 ppm due to the excellent synergistic catalytic properties of the polyfurfural film and Cu NPs. The electrode also showed excellent anti-interference ability, stability and reproducibility. Moreover, satisfactory results were obtained when the modified electrode was used for the determination of TNT in tap water samples, showing n excellent prospects for practical applications.
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SCIENCE OF THE TOTAL ENVIRONMENT
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2024
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IF 8.2
Shasha Fang,Yue Geng,Lu Wang,Jun Zeng,Shimin Zhang,Yucheng Wu,Xiangui Lin
Polybrominated diphenyl ethers (PBDEs) are persistent pollutants that may undergo microbial-mediated debromination in anoxic environments, where diverse anaerobic microbes such as methanogenic archaea co-exist. However, current understanding of the relations between PBDE pollution and methanogenic process is far from complete. To address this knowledge gap, a series of anaerobic soil microcosms were established. BDE-47 (2, 2′, 4, 4′-tetrabromodiphenyl ether) was selected as a model pollutant, and electron donors were supplied to stimulate the activity of anaerobes . Debromination and methane production were monitored during the 12 weeks incubation, while obligate organohalide-respiring bacteria (OHRBs), methanogenic, and the total bacterial communities were examined at week 7 and 12. The results demonstrated slow debromination of BDE-47 in all microcosms, with considerable growth of Dehalococcoides and Dehalogenimonas over the incubation observed in most BDE-47 spiked treatments. In addition, the accumulation of intermediate metabolites positively correlated with the abundance of Dehalogenimonas at week 7, suggesting potential role of these OHRBs in debromination. Methanosarcinaceae were identified as the primary methanogenic archaea, and their abundance were correlated with the production of debrominated metabolites at week 7. Furthermore, it was observed for the first time that BDE-47 considerably enhanced methane production and increased the abundance of mcrA genes, highlighting the potential effects of PBDE pollution on climate change. This might be related to the inhibition of reductive N- and S-transforming microbes, as revealed by the quantitative microbial element cycling (QMEC) analysis. Overall, our findings shed light on the intricate interactions between PBDE and methanogenic processes, and contribute to a better understanding of the environmental fate and ecological implication of PBDE under anaerobic settings.
研究领域:
环境科学
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微生物学
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生态学
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土壤学
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PubMed
高影响因子
DALTON TRANSACTIONS
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2024
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IF 3.5
Xiaoyu Chu,Xinrui Wang,Shuo Tian,Yongkuo Zhao,Shikai Liu,Hong Yan,Yan Shang
Modulating the photogenerated electrons of CeO2 to activate O2 and efficiently photocatalytic degradation of chlorophenols is a highly desired goal. Herein, we have successfully fabricated FePc/CeO2 heterojunction through H-bond induced assembly. The photocatalytic degradation of 2, 4-DCP by the amount-optimized FePc/CeO2 nanocomposite was improved by 3 times compared with pure CeO2. By means of electron paramagnetic resonance (EPR) and single wavelength photocurrent spectroscopy, it is confirmed that the excellent photocatalytic performance is mainly attributed to the formation of Z-scheme heterojunction, which promotes charge separation and transfer, and the introduction of FePc broadens the visible light absorption range of heterojunction. Moreover, O2 temperature-programmed-desorbed curves and electrochemical O2 reduction measurements results demonstrate that the single Fe-N4(II) site in FePc is more conducive to promoting O2 activation than that of other metal phthalocyanines. Based on in situ FT-IR and liquid chromatography-tandem mass spectrometry (LC-MS), a possible reaction pathway of 2, 4-DCP degradation was proposed. This study provides a novel strategy to prepare CeO2 based Z-scheme heterojunctions with abundant monoatomic sites for pollutant degradation.
研究领域:
环境科学
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材料科学
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FLUID PHASE EQUILIBRIA
·
2020
·
IF 2.838
Jinbei Yang,Shucui Han,Qiuju Xu,Meiqiong Yu
The density and viscosity of pure liquid 2, 4-dichlorofluorobenzene and 2, 6-dichlorofluorobenzene were measured in the temperature range of (318.15–348.15) K at the local atmospheric pressure of 99.8 kPa. The saturated vapor pressures of pure 2, 4-dichlorofluorobenzene and 2, 6-dichlorofluorobenzene and the isobaric vapor-liquid equilibria (VLE) data for the 2, 4-dichlorofluorobenzene + 2, 6-dichlorofluorobenzene binary system at atmospheric pressure were determined experimentally by a modified Rose still. The density values were accurately described by DIPPR equation. The viscosity data were well correlated using the Litovitz, Ghatee and VFT, and Andrade equations, and the VFT equation shows the best accuracy. Both Antoine and Riedel equations can well describe the relationship between saturated vapor pressure and temperature, which meet the requirements of engineering design. The Riedel equation is more accurate due to the lower average relative deviation. The VLE data were successfully correlated with NRTL and Wilson activity coefficient models, and the interaction parameters were obtained. The result indicates that there is no azeotrope in the binary mixture. The above thermodynamic properties of pure component and the VLE data presented are crucial for the design and operation of distillation for the isomeric mixture separation of 2, 4-dichlorofluorobenzene + 2, 6-dichlorofluorobenzene.
研究领域:
化学工程
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热力学
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JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH
·
2025
·
IF 1.3
Ning Li,Xing-Long Dai,Gui-Xin Xiong,Wan-Li Meng,Jie Hao,Jie-Jie Hao
N-(4-Guanidinobutyl)-2-(4-hydroxyphenyl)-2-oxoacetamide (C1), a marine-derived leonurine analogue, was synthesized via a six-step route with 38% total yield. Biological evaluation demonstrated potent anticoagulant activity through significant prolongation of APTT (20 mM) and PT (5 mM). C1 dose-dependently (100–200 μM) suppressed LPS-induced NO production in RAW 264.7 macrophages without cytotoxicity and modulated phagocytosis. In LPS-induced acute lung injury rats, C1 reduced proinflammatory cytokines in BALF. These findings highlight C1’s dual anticoagulant and anti-inflammatory properties as a promising lead compound.
研究领域:
药物化学
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海洋药理学
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炎症研究
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心血管药理学
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药物发现
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PubMed
高影响因子
JOURNAL OF RARE EARTHS
·
2026
·
IF 9.6
Yuejia Wu,Li Li,Lina Su,Ling Huang
The elemental doping strategy was widely adopted to improve the ion transport of lanthanum silicate apatites (La 9.33 Si 6 O 26 , LSO), a very promising electrolyte for solid oxide fuel cells (SOFCs). Specifically, La 9.33 Si 5.5 (Ga 1/2 V 1/2 ) 0.5 O 26 , i.e., LSGV 0.5 is obtained through (Ga 1/2 V 1/2 ) 4+ doping, which leads to not only a 4-fold oxygen ion conductivity (15.8 mS/cm at 800 °C) improvement, but also a 150 °C reduced sintering temperature compared with that of LSO. The as-such fabricated SOFC achieves a peak power density of 0.357 W/cm 2 at 800 °C using LSGV 0.5 as the electrolyte, demonstrating the effective complex ion doping towards enhanced performance for apatite-based electrolytes.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2024
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IF 6.9
Linquan Dai,Bo Feng,Mengyan Tang,Yuangan Chen
It is challenging to separate between molybdenite and chalcopyrite due to their comparable hydrophobic characteristics. Inorganic depressants were previously used to separate two minerals, but the results were unsatisfactory and polluted the environment. In this study, the molybdenite and chalcopyrite were separated using a highly effective and ecologically safe depressant, 2,4-Diamino-6-hydroxypyrimidine (DAHP). According to the single mineral experiment, chalcopyrite is totally depressed while molybdenite has superior floatability. The efficacy of DAHP as the depressant was validated by further artificially mixed mineral flotation experiments, indicating the possibility of separating chalcopyrite and molybdenite. The adsorption capacity experiment results showed that the adsorption capacity of DAHP on the surface of chalcopyrite was greater than that on the surface of molybdenite. Zeta potential experiment results show that DAHP is adsorbed on the surface of chalcopyrite and molybdenite through static electrostatic interactions . X-ray photoelectron spectroscopy (XPS) experiment results show that DAHP is mainly adsorbed on chalcopyrite surface through –NH 3 + group, which hinders the adsorption of kerosene. The electrostatic contact between DAHP and molybdenite has the least effect on kerosene adsorption. This study shows that DAHP has the potential to separate chalcopyrite and molybdenite as an efficient and environmentally friendly depressant.
研究领域:
矿物加工工程
·
环境科学
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