COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Miao Yuan,Saidan Wang,Hongxia Du,Yating Sui,Xiangjing Zhang,Song Zhao,Qiushi Li,Shaojie Liu,Xuteng Xing,Erjun Tang
Two-dimensional Ti 3 C 2 T x MXene, with a large specific surface area, high chemical stability and excellent barrier properties, has become a promising of anti-corrosion filler in organic coatings. However, the poor dispersion and compatibility in organic coatings restrict its efficient application. To this end, L-histidine (L-His) corrosion inhibitor was grafted on the 3-aminopropyl triethoxysilane (APTES) functionalized Ti 3 C 2 T x MXene surface, under the electrostatic attraction between the carboxylate and protonated aminopropyl groups. The obtained APTES-Ti 3 C 2 T x MXene@L-His cannot only accelerate the dispersion of Ti 3 C 2 T x MXene filler, but also greatly promote the anti-corrosion property and service lifetime of coatings through combining the physical shielding effect of MXene laminate structure with active anti-corrosion function of L-His corrosion inhibitor. Results show that amino-functionalized Ti 3 C 2 T x MXene can maintain homogeneous in epoxy resin for 300 h, enhancing its dispersion in epoxy coating. Moreover, APTES-Ti 3 C 2 T x MXene@L-His composite can achieve the continuous release of L-His for 3000 min, and additional acid-base dual response property, the releasing rate of L-His is significantly accelerated in acidic or alkaline solutions. The total loading amount of L-His in APTES-Ti 3 C 2 T x MXene@L-His composite is about 3 %. Furthermore, the practical composite coating containing APTES-Ti 3 C 2 T x MXene@L-His also exhibits the excellent anti-corrosion and certain self-healing properties, such as its |Z 0.01 Hz| value remains above 10 10 Ω·cm 2 during the 40 d immersing in 3.5 NaCl solution, which is 3 orders of magnitude higher than that of pure epoxy coating. This work extends the great significance for Ti 3 C 2 T x MXene based composite coatings application of in the field of anti-corrosion.
研究领域:
材料科学
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腐蚀与防护
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有机涂层改性
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Juan Hou,Qinqin Chen,Xiangzhi Meng,Donghan Wang,Huiling Liu,Wei Feng
The increasing presence of heavy metals and amino acids in environmental and pharmaceutical samples necessitates the development of effective and sensitive detection methods. Traditional analytical techniques often lack the specificity and sensitivity required for simultaneous detection of multiple analytes, leading to a need for novel approaches. In this study, we developed a ratiometric fluorescence probe based on a physical mixture of red and blue carbon dots (R/BCDs) for the selective detection of lead ions (Pb 2+ ) and L-cysteine (L-Cys). The probe was synthesized through hydrothermal methods and characterized by various spectroscopic techniques. The R/BCDs probe exhibited a remarkable 11.6-fold fluorescence quenching in response to Pb 2+ , with a detection limit of 15 nM, while subsequent addition of L-Cys showed a 9.6-fold restored fluorescence signal, achieving a detection limit of 75 nM. Additionally, we demonstrated the feasibility of fabricating colorimetric test paper and hydrogels, enabling rapid on-site analysis. This dual-analyte detection capability was demonstrated through successful application in real water and pharmaceutical samples. The R/BCDs probe offers a novel, simple, and effective strategy for environmental monitoring and biological assessments, highlighting its potential for practical applications.
研究领域:
环境科学
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分析化学
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生物医学
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产品关联
DOI
高影响因子
MOLECULES
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2024
·Vol. 29
·期 11
·2426
·
IF 4.2
Liming He,Hongda Xu,Yang Cui,Jian Qi,Xiaolong Wang,Quan Jin
Carbon-based magnetic metal composites derived from metal–organic frameworks (MOFs) are promising materials for the preparation of broadband microwave absorbers. In this work, the leaf-like co-doped porous carbon/carbon nanotube heterostructure was obtained using ZIF-L@ZIF-67 as precursor. The number of carbon nanotubes can be controlled by varying the amount of ZIF-67, thus regulating the dielectric constant of the sample. An optimum reflection loss of −42.2 dB is attained when ZIF-67 is added at 2 mmol. An effective absorption bandwidth (EAB) of 4.8 GHz is achieved with a thickness of 2.2 mm and a filler weight of 12%. The excellent microwave absorption (MA) ability is generated from the mesopore structure, uniform heterogeneous interfaces, and high conduction loss. The work offers useful guidelines to devise and prepare such nanostructured materials for MA materials.
研究领域:
材料科学
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电磁学
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产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
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2024
·
IF 7.1
Jia’nan Zhang,Zizhen Liu,Yihan Wang,Bo Yu
l-Homoserine is proven to be a promising precursor for the synthesis of l-phosphinothricin, which is a broad-spectrum herbicide with low toxicity. To enhance the sustainability of the process, the utilization of nonfood carbon sources for l-homoserine production is highly sought-after. Acetate, which can be captured from C1 gases, has the potential to become the most abundant feedstock for biomanufacturing. In this study, we systematically engineered the Escherichia coli strain to generate l-homoserine from acetate. The production of l-homoserine from acetate was initially achieved by deleting branch pathways, activating the glyoxylate shunt, and enhancing the synthetic pathway. The strain’s tolerance and acetate assimilation capabilities were strengthened through adaptive laboratory evolution. Reducing the flux toward gluconeogenesis further facilitated the production of l-homoserine. Finally, the engineered strain produced 15.96 g/L l-homoserine solely from CO2-derived acetate and formate in a 5 L fermentor via a fed-batch process. This study provides insights into the development of a low-carbon bioeconomy for the herbicide industry.
研究领域:
生物工程
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可持续发展
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合成生物学
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产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2024
·
IF 5.7
Jie Zheng,Hongxiang Liu,Jiwen Zhang,Bo Yu
L-Azetidine-2-carboxylic acid (L-Aze), a natural nonproteinogenic amino acid found widely in plants, has recently been identified as an environmentally friendly agent for controlling powdery mildew with low toxicity. In this study, a biological route for L-Aze production via the methionine salvage pathway (Yang Cycle) was first in silico designed for Escherichia coli. Subsequently, systematic engineering strategies were employed to enhance the production efficiency, including the enhancement of the 5-phosphoribosyl 1-pyrophosphate (PRPP) supply, construction of the ATP-adenine cycle, and engineering of the strain’s resistance to L-Aze. The final strain produced L-Aze from glucose with a titer of 568.5 mg/L. The antifungal activity of the produced L-Aze in the fermentation broth was also confirmed for treating powdery mildew in cucurbits. This approach not only provides a sustainable and green route for pesticide production to control powdery mildew but also expands our understanding of the exogenous construction of the Yang Cycle in E. coli.
研究领域:
微生物学
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植物病理学
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环境科学
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DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2014
·
IF 2.045
Qinghua Luan,Yongli Wang,Guan Wang,Jingxiang Yang,Hongxun Hao
The solubility of calcium-l-lactate pentahydrate (CLLP) in binary ethanol + water and acetone + water solvent mixtures was measured in the temperature range of 278.15 K to 313.15 K by using a synthetic method. The solubility of CLLP increases with increasing temperature, whereas it decreases with the increase of the initial mole fraction of ethanol or acetone. The solubility data were correlated by using the modified Apelblat equation, the CNIBS/R-K equation, and the hybrid model, respectively. It was found that the modified Apelblat equation could give better correlation results both in ethanol aqueous solutions and in acetone aqueous solutions. The dissolution enthalpy, entropy, and Gibbs energy change of dissolution of CLLP in these solvent mixtures were obtained by using the modified van’t Hoff equation.
研究领域:
化学工程
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热力学
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DOI
高影响因子
Analytical Methods
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2014
·Vol. 7
·期 2
·684-689
·
IF 1.938
Yuan Su,Li Qi,Xiaoyu Mu,Minglin Wang
In this work, L-histidine-stabilized gold nanoclusters were prepared by a green one-pot process and employed as a selective probe for sensing ferric ions. The obtained probe exhibited bluish green fluorescence, and exhibited an excitation maximum at 394 nm and emission maximum at 492 nm. The fluorescence of the probe was obviously quenched by the introduction of ferric ions, hinting that the synthesized probe could be applied for sensing ferric ions. Further, the selectivity of the proposed probe for sensing ferric ions was investigated. The results indicated that the fluorescent probe had favorable sensitivity and selectivity for the detection of ferric ions. Moreover, this probe was further used for the analysis of ferric ions in bean sprouts. It showed that the gold nanocluster based fluorescent probe has great potential for sensing metal ions in plants.
研究领域:
分析化学
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植物学
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产品关联
DOI
高影响因子
Catalysts
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2022
·Vol. 12
·期 8
·887
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IF 4.501
Yu Hao,Shaohua Chen,Xueyin Zhang,Tiehong Chen
Pt1/CeO2nanospheres (Pt/CeO2-NS) were synthesized by the bath oiling method with L-asparagine as a necessary additive. Owing to the morphology control effect and coordination interaction of L-asparagine, CeO2nanospheres can retain their nanosphere structure and show stronger electronic metal-support interaction with highly dispersed Pt. Moreover, the toluene catalytic combustion performance of Pt/CeO2-NS was investigated. The structure-performance relationship is analyzed according to the coordination state of Pt. The Pt/CeO2-NS catalyst exhibited superior catalytic activity than the commercial CeO2-supported Pt catalyst, which is attributed to its higher oxygen vacancy and Pt4+.
研究领域:
催化化学
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材料科学
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环境科学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Zhaoyu Mao,Xiang Gao,Juan Qiu,Chunchao Chen,Kangwei Gongsun,Changming Bu,Qing Zang,Min Yu,Houyi Ma
A simple two-electrode system was utilized to fabricate a layer of CuCl on the surface of bronze for simulating the "bronze disease". The addition of L-arginine (Arg) reduced the conversion time of the CuCl patina in water from 6 h to 3 h and enhanced the protection efficiency of the transformed patina from 27.9 % to 81.8 %. The alkalinity of Arg and its coordination capacity with Cu 2 + facilitate the transformation of CuCl, modify the transformation mechanism, and alter the morphology and structure of the patina. The immersion experiment further substantiates the stability and self-reinforcing properties of the Arg-transformed patina.
研究领域:
材料科学
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文物保护
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产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2024
·
IF 5.7
Xueyi Cai,Ziqiang Lin,Qihong Zheng,Mengzhen Liao,Hongfu Li,Hanxiao Feng,Huan Chen,Yang Zhang,Xiao Chen,Dong Liang
The unripe fruit of the plant Momordica charantia L., commonly known as bitter gourd or bitter melon, is a popular vegetable and medical herb in many parts of the world and is characterized by its strong bitter taste. In our endeavor to decode its bitter taste, the dichloromethane fraction of 75% methanol extract of bitter gourd was found to be intensely bitter. Combining sensory analysis-guided fractionation and newly developed comparative high-pressure liquid chromatography (HPLC) analysis-guided purification led to the isolation of five known compounds including momordicoside L (1), (23E)-3β-O-malonyl-7β,25-dihydroxycucurbita-5,23-dien-19-al (2), 3-O-β-d-allopyranosyl-7β,25-dihydroxycucurbita-5,23(E)-dien-19-al (3), momordicine IV (5), and charantoside B (6) and three new compounds 3-O-β-d-3-ketoglucopyranosly-7β,25-dihydroxycucurbita-5,23(E)-dien-19-al (4), 6′-O-malonylmomordicoside L (7), and 6′-O-malonylmomordicine IV (8) from bitter gourd. Sensory analysis revealed compounds 3–8 had strong bitter taste with their bitter taste recognition thresholds in the range between 3.6 (4) and 13.6 ppm (6) in 3% ethanol. UPLC-MS/MS quantification showed that their concentration in bitter gourd ranged from 16.5 ± 1.3 mg/kg (4) to 214.8 ± 14.0 mg/kg (6) on a dry weight basis. Calculation of the dose-over-threshold (DoT) factor showed that momordicine IV (5) and charantoside B (6) should be considered as bitter principles of bitter gourd. In addition, the study also demonstrated the ubiquity of the isomerization reaction in the side chain of cucurbitane-type triterpenoids. Many isolated compounds were the isomerized products of their natural precursors, and these precursors should be the primary bitterness contributors of fresh fruits. In addition, comparative HPLC analysis-guided purification could be a practical approach for the fast isolation of acid-labile precursors.
研究领域:
植物化学
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食品科学
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药用植物学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2011
·
IF 2.48
Yunchang Fan,Sheli Zhang,Jichuan Kong,Juan Miao
In this work, the interaction of an ionic liquid (IL) 1-octyl-3-methylimidazolium chloride ([Omim]Cl) and L -tryptophan was investigated with fluorescence spectroscopic method. The quenching mechanism and binding characteristics of [Omim]Cl with L -tryptophan at different temperatures were studied from fluorescence measurement. The thermodynamic parameters such as free energy change (Δ G ), enthalpy change (Δ H ) and entropy change (Δ S ), were calculated by thermodynamic equations. The experimental results indicated that [Omim]Cl and L -tryptophan had weak interaction and the mechanism of quenching belonged to static quenching. Hydrogen bonds and van der Waals interactions played important roles in the binding of [Omim]Cl with L -tryptophan.
研究领域:
生物化学
·
分子生物学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 8
·3323-3331
·
IF 3.069
Xi Wang,Tian Gao,Mian Yang,Jie Zhao,Feng-Lei Jiang,Yi Liu
L-Asparagine, a common amino acid, is a cost-effective and ideal precursor for carbon dots because of its high nitrogen content and its abundance in nature. By using L-asparagine as a biocompatible precursor, fluorescent nitrogen-doped carbon dots (A-CDs) were prepared by a one-pot microwave-assisted method. Then, a reasonable structure for A-CDs was put forward, which confirmed that unconjugated small molecules could transform into carbon dots with the sp2 core, and was helpful in the discussion of the photoluminescence mechanism. It was concluded that the photoluminescence origin of A-CDs was from the graphite-like structure and surface defects. The A-CDs showed high stability in strong ionic solutions and negligible cytotoxicity even when the incubation concentration was up to 800 μg mL−1. Long-time bioimaging tests suggested that A-CDs have great potential for use in a wide variety of biological applications.
研究领域:
材料科学
·
生物医学工程
·
化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）