CARBON
·
2025
·
IF 11.6
Zhipeng Cao,Ru Wang,Liluo Shi,Nannan Guo,Rui Zhou,Xia Qiu,Yirong Wang,Quanchao Zhuang,Zhicheng Ju,Yan Song,Yaxin Chen
Hard carbon (HC) anodes exhibiting a distinct low-potential plateau (LPP) are crucial for enhancing the energy density of sodium-ion batteries.We demonstrate that closed-pore formation is governed by carbon-layer bending, underscoring the significance of enhanced curvature. We introduce a cellulose depolymerization–reconstruction strategy that increases carbon-layer curvature and yields closed pores, thereby enabling LPP-dominated Na + storage. The resulting curvature-engineered hard carbon (H-HC) delivers a reversible capacity of 326.66 mAh g -1 at 20 mA g -1 , of which 214.38 mAh g -1 (≈ 65.6%) is attributable to the LPP. By contrast, directly carbonized HC yields a total capacity of 218.96 mAh g -1 with an LPP contribution of 135.18 mAh g -1 at the same current density. This work establishes enhanced carbon-layer curvature as a pivotal design parameter for closed-pore formation and LPP performance, offering guidance for advanced carbon anode design in SIBs.
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高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Hongwen Xu,Jiadi Sun,Haiming Wang,Yinzhi Zhang,Xiulan Sun
A new, green, and cost-effective magnetic solid-phase extraction of aflatoxins and ochratoxins from edible vegetable oils samples was developed using polydopamine-coated magnetic multi-walled carbon nanotubes (PDA@Fe 3 O 4 -MWCNTs) as the absorbent. PDA@Fe 3 O 4 -MWCNTs nanomaterials were prepared by chemical co-precipitation and in situ oxidation and self-polymerization of dopamine and was characterized. Factors affecting MSPE and the adsorption behavior of the adsorbent to mycotoxins were studied, and the optimal extraction conditions of MSPE and the complexity of the adsorption process were determined. Based on this, the magnetic solid-phase extraction-high-performance liquid chromatography-fluorescence detection method (MSPE-HPLC-FLD) was established for determining six mycotoxins [aflatoxin B 1 (AFB 1 ), AFB 2 , AFG 1 , and AFG 2 , and ochratoxin A (OTA) and OTB)] in vegetable oils. The recovery was 70.15%~89.25%, and RSD was ≤6.4%. PDA@Fe 3 O 4 -MWCNTs showed a high affinity toward aflatoxins and ochratoxins, allowing selective extraction and quantification of aflatoxins and ochratoxins from complex sample matrices.
研究领域:
食品安全
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分析化学
·
环境科学
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DOI
高影响因子
FOOD CHEMISTRY
·
2020
·
IF 6.306
Yanjing Yun,Zhisong Lu,Jing Yang,Taotao Liang,Gang Xiao,Yan Qiao,Yang Liu
Aflatoxin B 1 (AFB 1 ) contamination causes huge economic losses. To explore the correlation between catalase (CAT) and AFB 1 production during fungal development, we fabricated an electrochemical CAT-activity sensor by measuring residual H 2 O 2 after enzymatic degradation. The sensor made by palladium nanoparticles/carbonized bacterial cellulose nanocomposites exhibits a linear range over 0.5–3.5 U/mL and a detection limit of 0.434 U/mL. Both dry weight and CAT activity of mycelia continuously increase. But, the latter shows a greater increase than the former after three days. Specific CAT activity in crude enzyme extract of A. flavus was quantified. It maintains at ~25.00 U/mg for 3 days and enhances to 28.91 and 45.30 U/mg, respectively, on days 4 and 5. AFB 1 production follows the same trend. On days 4 and 5, AFB 1 concentration reaches 201.35 and 767.9 ng/mL, respectively. The positive correlation between specific CAT activity and AFB 1 production suggests that CAT is involved in AFB 1 biosynthesis.
研究领域:
微生物学
·
毒理学
·
分析化学
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DOI
PubMed
高影响因子
Soft Matter
·
2019
·Vol. 15
·期 32
·6504-6517
·
IF 3.399
Caifen Lei,Qiang Li,Lu Yang,Fei Deng,Jianyao Li,Zihan Ye,Ying Wang,Zhenkun Zhang
Under external pressure compression, various kinds of artificial microcapsules can undergo buckling induced deformation and catastrophic rupturing failure, which needs to be understood for their diverse practical applications. For this, many theories and numerical simulations have recently emerged, leading to some intriguing but often debatable predictions and scaling laws. However, experimental testing of these predictions is very limited, due to challenges in realizing prescribed buckling pathways and in situ monitoring of the buckling procedure. Herein, we report the buckling behaviors of well-defined spherical polydopamine (PDA) capsules with tunable sizes and homogeneous nanoscale shells. Simple but controlled solvent evaporation was implemented inside a home-made optical chamber to induce buckling of PDA capsules by following a prescribed pathway toward targeted shapes that are only dictated by the inherent material properties of the capsules. In addition, the buckling speed was slowed down to the timescale of minutes, which can prevent buckling from being trapped at some metastable intermediate states as well as facilitating in situ optical monitoring of the whole buckling procedure in slow motion. In this way, several classic buckling behaviors were clearly observed, including the sudden appearance of spinodal-like dimples above critical pressures, transition of the indentation rim from the axisymmetric to polygonal shape, and evolution of multi-indented buckling into single indented buckling following Ostwald ripening. These observations are qualitatively comparable with recent predictions from numerical results. Furthermore, some novel buckling phenomena have been reported for the first time, which might stimulate further theories and numerical simulations.
研究领域:
材料科学
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力学
·
纳米技术
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PubMed
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2024
·Vol. 57
·期 41
·41LT01
·
IF 3.1
Yifan Li,Yanyu Li,Xingjian Feng,Chongpu Zhai,Shuwen Zhang,Minglong Xu
Flexoelectricity, denoted as an electromechanical coupling effect from strain gradient introduced polarization, is prevalent in dielectric materials. However, its application in low-viscosity liquids has been limited by the scale of the flexoelectric coefficient. This study explores the flexoelectric coefficient of various hydrated ion solutions through a series of experiments. Additionally, the interplay between ion adsorption and the flexoelectric effect is investigated by using interfacial voltage detection. By introducing hydrated structures into liquids, a significant enlargement of the flexoelectric coefficient up to 2.3 × 10−9 C m−1 is obtained in Fe2(SO4)3 solution by four times than DI water. These findings highlight the remarkable electromechanical properties of liquid materials with hydrated ions and suggest promising avenues for the application of liquid dielectrics in hydrovoltaic technology, ionotronic devices, and energy harvesters.
研究领域:
材料科学
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物理化学
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能源技术
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高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2019
·Vol. 42
·期 16
·2734-2742
·
IF 2.516
Wenyu Sun,Chaoyue Wang,Yang Jin,Xiang Wang,Shanshan Zhao,Meng Luo,Jizhong Yan,Shengqiang Tong
Four stereoisomeric components were produced during the synthesis of the antidepressant drug ( 1S, 4S )-sertraline hydrochloride due to the two chiral carbon centers in its chemical structure, including ( 1S, 4S ), ( 1R, 4R ), ( 1S, 4R ), and ( 1R, 4S )-isomer. Stereoselective separation of the target isomer ( 1S, 4S )-sertraline from the medicinal reaction mixtures by countercurrent chromatography using hydroxypropyl-β-cyclodextrin as the stereoselective selector was investigated. A biphasic solvent system composed of n -hexane/0.20 mol/L phosphate buffer solution with pH 7.6 containing 0.10 mol/L of hydroxypropyl-β-cyclodextrin (1:1, v/v) was selected for separation of cis -sertraline and trans -sertraline using reverse phase elution mode and ( 1S, 4S )-sertraline was separated with ( 1R, 4R )-sertraline using recycling elution mode. A fabricated in-house analytical countercurrent chromatographic apparatus was used for optimization of the separation conditions. Stationary phase retention and peak resolution were investigated for separation of cis -sertraline and trans -sertraline by the analytical apparatus.
研究领域:
药物化学
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分析化学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
·
2023
·Vol. 59
·期 1
·129-141
·
IF 3.3
Yudan Lin,Huaxia Yang,Liang Jiang,Yongjun Zhang,Jia Li,Xiaoxu Zhu
Summary Different raw rice and starters will affect the quality of Chinese rice wine (CRW). This study focused on the quality (flavour components, total phenolic content and antioxidant capacity) between Hong Qu japonica rice wine and Wheat Qu glutinous rice wine. Free amino acids and volatile compounds were analysed respectively. Total phenolic content was compared using Folin–Ciocalteu methods and antioxidant activity using DPPH, ABTS + and FRAP methods. The results indicated that total free amino acid content of CRW ranged from 0.959 ± 0.09 to 3.229 ± 0.24 g L −1 . About 65 volatile compounds were obtained in wine samples, mainly including alcohols, esters, aldehydes, acids, phenols and ethers. Isopentanol, isobutanol, phenylethyl alcohol, ethyl lactate, diethyl succinate, benzaldehyde, furfural and 2,4-ditert-butylphenol were the prominent aroma components in samples. Total phenolic content in samples ranged from 0.27 ± 0.00 to 0.45 ± 0.01 mg GAE mL −1 . Experimental samples showed different radical scavenging capacity and ferric-reducing capacity. These results proved that japonica rice wine with Hong Qu had abundant flavour components and strongest antioxidant capacity, the brewing raw material can be better developed in the production of CRW.
研究领域:
食品科学
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生物化学
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DOI
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Yunzheng Wang,Lanling Chu,Jiansong Qu,Bo Ding,Xuejun Kang
A novel analytical method based on nanofiber-packed solid-phase extraction (PFSPE) combined with HPLC-FLD has been successfully developed and applied to determine aflatoxin B1, B2, G1, G2 in foods. In order to effectively adsorb analytes from complex food matrices, four types of nanofibers based on skeleton of polystyrene–polyvinyl pyrrolidone were prepared by electrospinning and applied as adsorbent to home-made solid-phase extraction device. The effects of type of nanofibers, pH of sample, type and concentration of salt ion, type of activation solvent, type and volume of eluent, amount of nanofibers, and extraction time on the adsorption/desorption were investigated and optimized. Under optimal conditions, the method showed satisfactory linear relationship, with limits of detection (LODs) of 0.07–0.17 ng g −1 , intra-day and inter-day RSDs for spiked samples of 1.3–8.0 % and 1.9–5.8 %, and absolute recoveries in the range of 60.1–98.4 %. The results presented the great potential to be utilized to determine AFs in foodstuffs.
研究领域:
分析化学
·
食品科学
·
毒理学
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DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2020
·
IF 10.257
Chengxi Zhu,Dong Liu,Yuye Li,Shuai Ma,Meng Wang,Tianyan You
The simultaneous detection of multiple mycotoxins in grains is significant due to the enhanced toxicity induced by their synergistic effects . In this work, a dual-ratiometric electrochemical aptasensing strategy for the simultaneous detection of aflatoxin B1 (AFB1) and ochratoxin A (OTA) was developed. Here, an anthraquinone-2-carboxylic acid (AQ)-labelled complementary DNA (cDNA) was used to provide separate and specific binding sites to assemble the ferrocene-labelled AFB1 aptamer (Fc-Apt1) and methylene blue-labelled OTA aptamer (MB-Apt2). The target-induced current ratios of I Fc /I AQ and I MB /I AQ were then used to quantitatively relate to AFB1 and OTA, respectively. Following this principle, two types of aptasensors involving the hairpin DNA (hDNA) and linear single-stranded DNA (ssDNA) as the cDNA were fabricated for performance comparisons. The results revealed that hairpin DNA with a rigid 2D structure can greatly improve the assembly and recognition efficiency of the sensing interface, which makes the hDNA-based aptasensor possess high sensitivity, reliability and anti-interference ability. The hDNA-based aptasensor exhibited a detection range of 10-3000 pg mL −1 for AFB1 and 30-10000 pg mL −1 for OTA, respectively, with no observable cross-reactivity. Furthermore, the aptasensor was applied to analyze corn and wheat samples, and the reliability was validated by HPLC-MS/MS. Our work has presented a novel way for fabricating a high-performance aptasensor for simultaneous detection of multiple mycotoxins .
研究领域:
食品安全
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分析化学
·
生物传感技术
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DOI
高影响因子
FOOD CONTROL
·
2014
·
IF 2.819
Chunmei Jiang,Junling Shi,Xianqing Chen,Yanlin Liu
Fungal profiles and ochratoxin A (OTA) accumulation during wine making were investigated using five different wine grape cultivars, Cabernet Sauvignon, Pinot Noir, Merlot, Syrah and Petit Verdot and the intrinsic influences caused by sulfur dioxide, ethanol and combine effect of ethanol and reducing sugar were analyzed using Cabernet Sauvignon and inoculation of Aspergillus carbonarius . Aspergillus spp. and Penicillium spp. were found as the major fungi in all winemaking processes and were highly correlated with OTA accumulation in wine. Most fungi died and OTA production decreased after 48 h of alcoholic fermentation , being consistent with the period when ethanol accumulation increased. The addition of SO 2 significantly inhibited the growth and OTA production of A. carbonarius with complete inhibition at 500 mg/L. When the ethanol concentration in the must increased to the range of 2–4%, growth and OTA production of A. carbonarius were significantly inhibited. Reducing sugar concentration had no significant effect on the growth and OTA production of A. carbonarius within the levels changing during the winemaking. Therefore, the increase of ethanol concentration played an important role in causing the decrease of fungal contamination and OTA accumulation during winemaking.
研究领域:
食品微生物学
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真菌毒素学
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酿酒科学
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食品安全
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应用微生物学
·
分子毒理学
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DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2024
·
IF 6
Xiaodong Peng,Wenyan Wu,Yiqian Ma,Feilong Shao,Yingzi Zhang,Yongyu Feng,Huan Wang
Jiangxiangxing baijiu is one of the most popular baijiu in China because of its unique flavor characteristics. However, the differences in molecular and atomic levels between various processes of Jiangxiangxing baijiu remain unclear. The ethanol δ 13 C of 30 samples of daqu Jiangxiangxing baijiu (DQ-JX) and 25 samples of non-daqu Jiangxiangxing baijiu (NDQ-JX) were determined, and their distribution ranges were (−18.50 ± 0.68)‰ and (−15.64 ± 1.24)‰, respectively ( p < 0.01) by Gas chromatography–isotope ratio mass spectrometry(GC–IRMS). The gas chromatography–mass spectrometry (GC–MS) analysis revealed that the contents of volatile compounds in DQ-JX were higher than those in NDQ-JX, but the proportions of ester and acid compounds of DQ-JX were lower. Orthogonal partial least squares discriminant analysis revealed that the two processes of Jiangxiangxing baijiu had significant classification effects, and 16 potential differential compounds were identified. The heat map analysis found that methanol, ethyl acetate, 1-propanol, and acetic acid were significantly higher in DQ-JX than in NDQ-JX. The accuracy of flavor compound identification model combined with stable carbon isotope analysis was 94.4%.
研究领域:
食品科学
·
分析化学
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DOI
高影响因子
Materials Advances
·
2023
·Vol. 4
·期 4
·1196-1201
·
IF 5
Yuanyuan Chen,Yunqi Shi,Min Liang,Huiliang Wang
Shape deformable hydrogels have wide potential applications in soft robotics, artificial muscles, manipulators and flexible devices. The development of simple, facile and efficient methods for preparing shape deformable hydrogels is of significant importance for their practical applications. In this work, we proposed a novel strategy to transform isotropic hydrogels into shape deformable hydrogels by altering the surface areas and hence the swelling behaviours of hydrogels. Simple scratching and photolithography patterning methods are employed to introduce grooves or projections on the surface of hydrogels. By controlling the density and direction of scratches, or the width, density, height and direction of the stripes, the degree and direction of the bending and twisting of the hydrogel can be adjusted. Taking the advantages of the photolithography method, more precise and complex patterns can be introduced onto hydrogel samples with different shapes; therefore, more complex shape deformations from 2D to 3D can be achieved. The strategy of changing surface area to endow isotropic hydrogels with shape deformation behaviour can be applied to a wide variety of hydrogels and many methods can be employed; therefore, it is of great significance for many practical applications.
研究领域:
材料科学
·
软体机器人技术
·
生物医学工程
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高影响因子
危险品化学品经营许可证（带存储）