ACS Applied Materials & Interfaces
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2021
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IF 9.229
You Zhang,Juping Wang,Shuai Zhao,Maria Serdechnova,Carsten Blawert,Hao Wang,Mikhail L. Zheludkevich,Fei Chen
A promising double-ligand strategy for the delivery of active corrosion inhibitors by a Zn(II)-based metal–organic framework (Zn-MOF) is developed. Zn-MOF compounds were synthesized by a facile one-pot solvothermal method and characterized. The Zn-MOF is based on the corrosion inhibitor benzotriazole (BTA) and 2,5-furandicarboxylic acid (H2FDA) ligand, which is a promising renewable building block alternative to terephthalic or isophthalic acid. The crystal structure and morphology are characterized by single-crystal X-ray diffraction analysis, powder X-ray diffraction analysis (PXRD), Fourier transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM). The synthesized MOF crystallites are in the trigonal space group R3c with the cell parameters in a three-dimensional (3D) anionic framework. Their ability to inhibit the corrosion process of aluminum alloy 2A12 in NaCl solution was also evaluated by immersion tests in solutions with and without a MOF. The postcorrosion analysis was performed by SEM and X-ray photoelectron spectroscopy (XPS). Additional information about the inhibition efficiency was obtained by electrochemical impedance spectroscopy (EIS). The results suggest that the as-synthesized MOF can release the inhibitors and form protective layers effectively on the surface of the aluminum alloy. The use of inhibitor-loaded MOF nanocontainers provides promising opportunities for the smart delivery of inhibitors and effective corrosion protection of 2A12 aluminum alloys.
研究领域:
材料科学
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腐蚀与防护
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DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
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2021
·
IF 6.901
Xiaofeng Wei,Ying Chen,Shan He,Huiting Lian,Xuegong Cao,Bin Liu
Metal-organic framework (MOF)-based electrochemical interface presents a broad platform for the chiral recognition of amino acids , but the inferior conductivity of most MOFs limits the sensitivity in practical applications of electrochemical sensing. Therefore, the L-histidine-regulated zeolitic imidazolate framework (L-His-ZIF) was proposed as a novel electrochemical interface for simple, efficient, and enantioselective determination of L-glutamate (L-Glu) based on the electrochemical impedance spectroscopy (EIS). Based on the resistance change, the L-His-ZIF interface can be directly used for chiral recognition without the assistance of high-conductive substances, where multiple immobilizations are generally required in MOF-involved voltammetry . The stacked L-His-ZIF nano-polyhedrons provided numerous cavities and high specific surface area, thereby forming adequate chiral recognition sites. Based on the L-His-ZIF interface, the enantioselective detection of l -Glu-was successfully achieved with a good linear relationship with the impedance difference in the range from 0.1 nM to 50 nM with the detection limit of 0.06 nM. This prepared ZIF-functionalized electrode provided the desired enantioselectivity and reproducibility with robust chiral recognition in the real application. More importantly, MOF-modified EIS can be applied for more chiral recognition of enantiomers by various MOF interfaces, which has great potential for applications in pharmaceutical monitoring and biochemical analysis.
研究领域:
分析化学
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生物医学工程
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2023
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IF 6.6
Zuwei Song,Yingmin Sun,Jing Wang,Bei Qian
Graphitic carbon nitride (g-C 3 N 4 ) can function as nanofillers in anti-corrosion coatings due to its two-dimensional structure. Here, we investigate the corrosion protection performance of g-C 3 N 4 for polyvinyl butyral (PVB) coatings. Transmission electron microscope (TEM) of the calcinated g-C 3 N 4 displays a sheet-like nanostructure with a single or few layers. By subjecting PVB coatings containing g-C 3 N 4 to electrochemical impedance spectroscopy (EIS) and salt spray tests, we were able to investigate their anti-corrosion performance thoroughly. Results of EIS shows that the values of coating resistance increased significantly for all PVB coatings enriched with g-C 3 N 4 nanosheets . The PVB coating containing 10 wt% g-C 3 N 4 nanosheets survived after a 300 h salt spray test. UV and Xenon lamp aging tests provide additional information and evidence to prove their potential in practical application.
研究领域:
材料科学
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腐蚀与防护
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DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2025
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IF 6.3
Sifei An,Qiang Wang,Haini Yang,Daquan Zhang,N.N. Andreev
Background Schiff bases are attractive as eco-friendly corrosion inhibitors for the protection of metals. In this study, a novel volatile corrosion inhibitor (VCI) based on Schiff base (LEU-T) is synthesized from leucine and salicylaldehyde. This study evaluates the volatile corrosion inhibition performance of LEU-T on mild steel and examines its anti-corrosion effect in a simulated atmospheric corrosion solution. Methods The corrosion inhibitor is characterized by Fourier transform infrared (FT-IR) absorption spectra. The corrosion behavior, inhibition efficiency, and anti-corrosion mechanism of the inhibitor on mild steel are evaluated using volatile inhibition ability (VIA) tests, electrochemical measurements (including potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS)), and theoretical calculations. Scanning electron microscopy (SEM) and atomic force microscope (AFM) confirm the formation of the inhibitive films on mild steel. Significant Findings The results demonstrate that LEU-T exhibits outstanding inhibition efficiency of 82.18 % in VIA tests. Electrochemical measurements indicate that the formed inhibitive films on the steel substrate lead to an increase in the charge transfer resistance. The corrosion inhibition efficiencies of leucine and LEU-T, as determined by electrochemical impedance spectroscopy, are 67.84 % and 83.90 %, respectively. SEM and AFM observations indicate that the inhibitor forms a protective VCI coating, effectively retarding the steel corrosion. The LEU-T has larger adsorption energy (-136.13 kJ/mol) compared to leucine (-88.48 kJ/mol) on mild steel.
研究领域:
材料腐蚀与防护
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应用化学
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表面科学
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电化学
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金属材料学
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DOI
高影响因子
Scientific Reports
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2016
·Vol. 6
·期 1
·1-14
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IF 5.228
Qiang Yujie,Guo Lei,Zhang Shengtao,Li Wenpo,Yu Shanshan,Tan Jianhong
The inhibitive ability of 2,6-diaminopyridine, tartaric acid and their synergistic effect towards mild steel corrosion in 0.5 M HCl solution was evaluated at various concentrations using potentiodynamic polarization measurements, electrochemical impedance spectroscopy (EIS), and weight loss experiments. Corresponding surfaces of mild steel were examined by atomic force microscope (AFM), field emission scanning electron microscope (FE-SEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS) analysis. The experimental results are in good agreement and reveal a favorable synergistic effect of 2,6-diaminopyridine with tartaric acid, which could protect mild steel from corrosion effectively. Besides, quantum chemical calculations and Monte Carlo simulation were used to clarify the inhibition mechanism of the synergistic effect.
研究领域:
材料科学
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腐蚀科学
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电化学
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表面科学
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金属材料
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物理化学
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DOI
高影响因子
Analytical Methods
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2016
·Vol. 8
·期 40
·7413-7419
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IF 1.915
Min Huang,Hanying Li,Hanping He,Xiuhua Zhang,Shengfu Wang
The sequence-specific recognition of SNPs is important for disease diagnosis and human gene therapy. In this work, a simple sensor based on electrochemical impedance spectroscopy (EIS) was developed for the highly sensitive and specific detection of G–G mismatches in dsDNA using a small molecule-modified gold electrode. After the electrochemical impedance sensor was incubated with G–G mismatched dsDNA, its charge-transfer resistance (Rct) increased significantly. Meanwhile, only a small increase in Rct values was observed for dsDNA with other base mismatches and for complementary dsDNA. Importantly, G–G mismatched dsDNA was selectively detected based on differences in charge transfer resistance (ΔRct) even in the presence of other DNA and ct-DNA. Under optimal experimental conditions, the established EIS sensor was used to quantify G–G mismatched dsDNA based on the linear relationship between ΔRct and the logarithm of the concentration of G–G mismatched dsDNA from 1 nM to 1 μM with a detection limit of 0.3 nmol L−1. This sensing strategy is a potential alternative tool for measuring G–G mismatched DNA for the diagnosis and early clinical detection of genetic diseases.
研究领域:
生物化学
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分子生物学
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分析化学
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DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
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2014
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IF 6.451
Zhao Zhang,Liqiang Luo,Guifang Chen,Yaping Ding,Dongmei Deng,Chunhai Fan
A novel simple protocol of synthesizing tryptamine-functionalized reduced graphene oxide (TRA–rGO) was proposed to fabricate label-free electrochemical impedance DNA biosensor. TRA was anchored to rGO with its indole ring via π-stacking interaction. The morphology, conductivity and interaction of TRA–rGO were characterized by atomic force microscopy , high resolution transmission electron microscopy , cyclic voltammetry , electrochemical impedance spectroscopy (EIS) as well as Raman and fluorescence spectroscopy. The amino-substituted oligonucleotide probe was conjugated to TRA by cross-linker glutaraldehyde for preparing an electrochemical biosensing platform. The DNA hybridization reaction of oligonucleotide probe with target DNA was monitored by EIS. Under optimum conditions, the proposed biosensor exhibited high sensitivity and low detection limit for detecting complementary oligonucleotide. The target oligonucleotide could be quantified in a wide range of 1.0×10 −12 –1.0×10 −7 M with low detection limit of 5.2×10 −13 M ( S/N =3).
研究领域:
生物传感技术
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材料科学
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分子生物学
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DOI
PubMed
高影响因子
International Journal of Analytical Chemistry
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2017
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IF 0.901
Xue Shouqing,Liu Xiaohui
The self-assembled monolayer (SAM) was prepared using octadecyl trichlorosilane (OTS) in distilled solution on the copper surface. The effect of inhibitor concentration on the rate of inhibition efficiency and corrosion rate in corrosion medium on copper by using polarization curves, electrochemical impedance spectroscopy (EIS), scanning electron microscope (SEM) was studied. The results showed that OTS SAMs exhibit the better corrosion resistance; the corrosion potential of copper OTS SAMs protection increased by about 1.02 V, while the corrosion current density decreased to 0.59 A/cm2. The corrosion rate is minimized and flattened and can reach 9.2% while the inhibition efficiency reached 95.4%, when the corrosion inhibitor has concentration of 40 ppm.
研究领域:
材料科学
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腐蚀与防护
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电化学
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产品关联
DOI
PubMed
高影响因子
ChemElectroChem
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2017
·Vol. 5
·期 4
·659-664
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IF 4.136
Dawen Yang,Ying Gu,Xu Yu,Zixia Lin,Huaiguo Xue,Ligang Feng
Graphical Cheap and cheerful : Nanostructured Ni 2 P−C was demonstrated as an efficient catalyst for urea electrooxidation. The material exhibited an excellent catalytic ability and was found to display improved charge-transfer kinetics towards urea electrooxidation. Nickel-based materials are a type of cost-effective catalyst for urea oxidation. Herein, we first reported nanostructured Ni 2 P−C as an efficient catalyst for urea electrooxidation. The Ni 2 P−C catalyst was prepared by a facile hydrothermal method and the structure and morphology were further characterized by X-ray diffraction (XRD) and transmission electron microscope (TEM). The hexagonal crystal structure for Ni 2 P was indicated by the characteristic peaks in the XRD patterns, and lattice fringes of Ni 2 P were clearly observed in the high-resolution TEM images. The catalytic ability for urea electrooxidation was studied by cyclic voltammetry and chronoamperometry techniques. It was found that the current density at 0.5 V was ca. 70.4 mA cm −2 , about 2.7 times higher than that of the referenced commercial nickel oxide catalyst. A good catalytic stability for urea oxidation was also obtained. A diffusion-controlled process was observed for urea oxidation on Ni 2 P catalyst while the active sites arising from Ni(II) ion oxidation was following a surface-redox-reaction-controlled process. Kinetics studies by impedance spectroscopy and Tafel slope analysis displayed improved charge-transfer kinetics towards urea electrooxidation. The results demonstrated that Ni 2 P would have potential applications for catalytic urea oxidation.
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
RENEWABLE ENERGY
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2021
·
IF 8.001
Tianya Li,Kejian Wang,Jihao Wang,Yueqi Liu,Yufen Han,Zhiyang Xu,Guangyi Lin,Yong Liu
As a rising star, the fuel cell will be applied very broadly. However, when the fuel cell works at a high current, too much water yield and the redundancy water block the air or oxygen enter the fuel cell, then the power reduces sharply. The gas diffusion layer (GDL) in the fuel cell is the critical component to transfer water and gas. A novel GDL was prepared in this paper to improve transferability. The new GDL consists of one carbon paper and two microporous layers. The microporous layer close to carbon paper is modified by pore-former CaCO 3 . The total thickness of the new GDL is 270 μm; then, the samples were pressed to 220, 240, and 260 μm by rolling, respectively. The electrochemical impedance spectroscopy tests at a large current (2.5 A/cm 2 ) show that the fuel cell with 240 μm GDL has relatively small transmission impedance regardless of high or low humidity. The results show that the new GDL can significantly improve the water transferability of the proton exchange membrane fuel cell.
研究领域:
能源科学
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Yue Ma,Qifang Sun,Su Wang,Ying Zhou,Dawei Song,Hongzhou Zhang,Xixi Shi,Lianqi Zhang
Favorable interface is essential for the implementation of high energy density and high safety solid-state lithium metal battery (SSLMB). The in-situ transformation of electrolyte from liquid to solid-state is of great significance for the compatibility of interface. Herein, an in-situ polymerized glycerin triglycidyl ether (PGTE) solid polymer electrolyte (SPE) featuring excellent ion transfer capability, superior interfacial compatibility and cross-linked structure is developed by the initiation of optimal LiDFOB following cationic catalytic mechanism. Ionic conductivity of 4.16 × 10 -4 S cm −1 is achieved at 60 °C due to the superiority of oxyethylene repeating units (C–C-O/C-O-C), and a discharge capacity of 135.2 mAhg −1 is obtained after 200 cycles at 0.2C for LiFePO 4 (LFP)/PGTE/Li battery. More importantly, as a Li salt initiated SPE, the in-situ polymerization process of PGTE is firstly investigated via ex-situ FT-IR, the ring opening catalytic activity of Lewis acid on epoxide is evaluated and the order of LiDFOB＞LiPF 6 ＞AlCl 3 is revealed. Furthermore, the effect of in-situ prepared SPE on electrode/electrolyte interface is innovatively explored using in-situ electrochemical impedance spectroscopy (EIS). The stable interfacial passivation layer is generated at platform voltage and the maximum value of average diffusion coefficient is also obtained at the plateau.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
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2023
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IF 7.4
Xin Xie,Dan Liu,Weili Wang,Juan Xiang,Minghui Yang,Guokun Liu
The abundance of brain-derived neurotrophic factor (BDNF) in aqueous humor (AH) is an ideal biomarker for the diagnosis of glaucoma, a chronic progressive optic neuropathy and the most frequent cause of irreversible blindness. The difficulty of AH-based BDNF detection is from the small amount of extracted AH in a paracentesis (<100 μL) and the ultra-low abundance of BDNF. In this work, we systematically studied the non-specific adsorption of biofluids on the bare gold electrode by electrochemistry and Raman spectroscopy techniques, revealing the unexpected negative correlation of the extent of non-specific adsorption with the size of the electrode. Based on it, a simple microelectrode-based sensor without the introduction of the blocking layer was developed for the detection of BDNF in the AH sample. Using electrochemical impedance spectroscopy (EIS) and extracting the changes of electron-transfer resistance of the electrochemical probe [Fe(CN)6]3–/4– on the sensor surface, the BDNF was quantified. The dynamic range was from 0.5 to 50 pg·mL–1, with a detection limit of 0.3 pg·mL–1 and a sample consumption of 5 μL. The real AH sample analysis confirmed the significant decrease of BDNF abundance in the AH of glaucoma patients. Our microelectrode-based EIS sensor displayed prominent advantages on simplified preparation, sensitive response, and low sample consumption. This AH-based BDNF analysis is expected to be used for the screening and diagnosis of glaucoma, especially for the high-risk population who have ocular diseases and have to undergo surgeries.
研究领域:
生物医学工程
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分析化学
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眼科
·
神经科学
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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）