Journal of Central South University
·
2024
·Vol. 31
·期 10
·3463-3481
·
IF 3.7
Ji Wen-hui,Cao Lin,Ji Xiao-hong,Peng Li-ming,Myronyuk Oleksiy,Han Dong-xiao,Pei Yan-tong,Li Wei-hua,Wang Wei
In this paper, 1-butyl-3-methylimidazole tetrafluoroborate ([BMIM]BF 4 ) is used as corrosion inhibitor. Polyacrylonitrile (PAN) is used to load the corrosion inhibitor. PAN/[BMIM]BF 4 hybrid nanofibers are successfully synthesized by electrospinning technology. The alkyd varnish is coated on the fiber membrane to prepare a composite coating, and then a series of tests are carried out on the self-healing and anticorrosive performance of the composite coating. It is observed by scanning electron microscope that the fiber morphology is stable and there is no bead-like structure. The composition of the composite fiber is analyzed by Fourier infrared spectroscopy, and it is confirmed that the hybrid nanofiber was successfully prepared. 3D laser confocal scanning microscope was used to observe the corrosion morphology and profile of the carbon steel. The composite coating shows good self-healing performance. [BMIM]BF 4 can form a protective film on the surface of the bare carbon steel substrate through physical adsorption or chemical adsorption in an alkaline environment. Electrochemical impedance spectroscopy was tested and analyzed. It is found that the maximum corrosion inhibition efficiency of the coating is 88.5% in 3.5 wt.% alkaline NaCl solution. Compared with the blank coating without nanofibers, the composite fiber varnish composite coating exhibits good self-healing and anti-corrosion properties.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2023
·Vol. 29
·期 4
·1381-1393
·
IF 2.8
Zeng Yong,Wang Keliang,Ke Xiang,Tan Xiaoqing,Jiang Bo,Zhu Weichen,Xiao Rengui
Compared with Li-ion batteries, dual-graphite batteries (DGBs) have low cost, easy handling, and renewable advantages. However, DGBs with pure ionic liquid as the electrolyte (LEDGBs) suffer from high self-discharge rate (SDR). Here, a gel polymer electrolyte (ILGPE) was prepared using polyvinylidene fluoride as the polymer matrix and 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide as the electrolyte and assembled into a gel polymer double-graphite battery (IGDGB). The results show that the IGDGB has an initial discharge capacity of 34.9 mAh g -1 , and SDR is only 3.63%/h lower than the LEDGB (25.07%/h) after resting for 3 h. Notably, even after resting for 10 h, the IGDGB still has a discharge capacity of 27.5 mAh g -1 . Meanwhile, the electrochemical impedance spectroscopy analysis results indicate that the low SDR of IGDGB is due to the limiting effect of ILGPE on the carrier strength. This result provides an idea of self-discharge reduction strategy for other electrochemical energy storage systems with intercalation storage mechanism.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xiaohan Liu,Peng Wang,Dun Zhang,Xiaotong Chen
The coalescence-induced droplet self-jumping behavior on the superhydrophobic surface (SHS) provides a new way to achieve atmospheric corrosion protection. This work controls the droplet self-jumping behavior by regulating the SHS’s surface energy and analyzes the relevant mechanism from the energy perspective, revealing the key pathway by which the surface energy impacts the droplet self-jumping behavior. On this basis, the electrochemical impedance spectroscopy testing technique is used to evaluate the effect of the droplet self-jumping behavior on the SHS corrosion protection performance, and the SHS atmospheric corrosion protection mechanism based on the coalescence-induced droplet self-jumping behavior is revealed. This study provides theoretical guidance for the development of SHS-based anticorrosion protection.
研究领域:
材料科学
·
腐蚀与防护
·
表面科学
✓ 已验证
DOI
高影响因子
TALANTA
·
2018
·
IF 4.244
Bin Jiang,Pei Dong,Jianbin Zheng
Using an ionic layer-by-layer self-assembly technique, colloidal gold nanoparticles (AuNPs) and diazo-resins (DAR) were immobilised on the surface of a p-aminobenzenesulfonic acid-modified glassy carbon electrode to form a matrix composite membrane for acetylcholinesterase (AChE) immobilisation. Photo-sensitive DAR was used as the assembly interlayer to convert the ionic bond into a covalent bond to improve the biosensor stability. These fabrication processes were followed by electrochemical impedance spectroscopy and cyclic voltammetry to verify the membrane formation. Because of the introduction of AuNPs/DAR/AChE biofilms, the modified electrode exhibited excellent electron transfer mediation and electrical conductivity. In addition, it exhibited high sensitivity in the range of linear concentration from 1.0 × 10 −8 to 1.0 × 10 −12 g L −1 with the detection limit of 5.12 × 10 −13 and 5.85 × 10 −13 g L −1 for malathion and methyl parathion , respectively. More importantly, the presented biosensor considerably improved stability because the electrostatic interaction was converted into covalent bonds by UV irradiation . It is a simple, cheap and stable method for quantitative detection of organophosphorus pesticides , and this method may pave a way for the sensitive, simple detection of different analytes without the need of expensive instrumentation.
研究领域:
分析化学
·
环境科学
·
生物传感技术
✓ 已验证
DOI
高影响因子
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
·
2020
·
IF 0.512
Le Lv,Wei Liu
Sol-gel method is the most popular way for the preparation of organic-inorganic hybrid anticorrosion coatings. Such sol-gel coatings is environmental friendly and chemical stable, showing enhanced corrosion resistance for metal substrates. Here, a saline with aniline substituted group N-(3-(trimethoxysilyl)propyl)aniline (TMPA) has been used together with tetraethyl orthosilicate (TEOS) for the preparation of organic-inorganic hybrid coating (OIHC) materials by sol-gel approach. Electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) measurements show that the hybrid coatings exhibit high corrosion resistance on aluminum substrates.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
CORROSION SCIENCE
·
2020
·
IF 6.479
Shan Wan,Xiao-Ze Ma,Chun-Hui Miao,Xin-Xin Zhang,Ze-Hua Dong
Initial atmospheric corrosion of clean copper and NaCl-deposited copper was investigated by quartz crystal microbalance and electrochemical impedance spectroscopy. 2-phenyl imidazoline (2-PI) exhibits increasing inhibition efficiency with temperature on chloride-induced atmospheric corrosion of Cu. However, on the NaCl-deposited Cu, adsorption amount of 2-PI is much higher than that on clean Cu possibly due to that rough corrosion products entrap lots of 2-PI molecules. The adsorption of 2-PI on corroded Cu is suggested to obey a capillary condensation and entrapment mechanism, but in dry argon atmosphere, it obeys a simple pseudo first-order model for lack of corrosion products.
研究领域:
材料科学
·
腐蚀与防护
·
电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Shu Zheng,Zheng Fu,Dongju Dai,Weimin Zhao
Garnet-type solid electrolytes are promising lithium (Li) ion conductors for all-solid-state batteries. However, their poor compatibilities towards Li metal due to their inherently lithiophobic properties severely hinder their practical application in garnet-based solid-state Li metal batteries (SSLBs). Here, we demonstrated a soldering method to modify the surface of garnet ceramic by forming a thin artificial sulfur layer, which results in a homogeneous and stable Li/solid electrolyte interface. This artificial interface effectively enhances the compatibility between the garnet-type solid electrolyte and the Li metal anode . Consequently, the interfacial resistance of sulfur-coated garnet electrolyte is significantly reduced from 1750 Ω cm 2 to 160 Ω cm 2 based on the electrochemical impedance spectroscopy (EIS) measurements on Li symmetric cells. Besides, the symmetric cell exhibits an excellent lifetime of more than 1100 h at a steady state of voltage hysteresis, which indicates a stable and dendrite-free garnet/Li metal interface . The fabricated Li|garnet|LiCoO 2 SSLB using this novel interfacial treatment delivers a high specific capacity of 126 mAh g −1 and good cycling stability.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Yangshuhan Xu,Daming Gao,Qiang Dong,Minghua Li,Anqiu Liu,Xiaochen Wang,Shufen Wang,Qiao Liu
Corrosion existing in many fields brings lots of troubles to our life. In this work, epoxy coatings modified by hydrophobic nano-silica and hydrophilic nano-silica were fabricated to provide corrosion protection for phosphatized Q235 carbon steel. The traditional epoxy coating was prepared by the polymerization of trimethylolpropane triglycidyl ether and diethylenetriamine. The modified epoxy coating was fabricated by the polymerization and mixing of trimethylolpropane triglycidyl ether, diethylenetriamine and nano-silica. The microscopic morphologies of various epoxy coatings were investigated by SEM. Wettability of epoxy coatings was measured by static contact angle measurement instrument. Thermal stability was tested by thermo gravimetric analyzer. Corrosion behaviors was investigated by electrochemical workstation. Adhesion was reflected by cross-cut test and pull-off test. Equivalent circuits were used to fit the electrochemical impedance spectrum (EIS). According to experimental results, modified epoxy coatings present good hydrophobicity, good thermal stability at 250 °C with only about 3 % weight loss and the ca. 10 μm modified epoxy coating added with the most hydrophobic nano-silica shows the best anticorrosive performance with impedance of 5.25 × 10 5 Ω•cm 2 (0.01 Hz) at 0 h immersion. The anticorrosive performance of epoxy coating is significantly improved when hydrophobic nano-silica is added into epoxy matrix. Adding hydrophobic nano-silica can effectively prolong the diffusion path of water-soluble corrosive medium and the hydrophobicity is able to retard the diffusion of water.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Tianjiao Meng,Dan Zhao,Huimin Ye,Yue Feng,Huan Wang,Yufan Zhang
A hybridization chain reaction (HCR) amplification-based electrochemical impedimetric biosensor is fabricated for the quick, sensitive, and specific detection of miRNA-21 (miR-21) via monitoring of electrode interfacial property changes in real-time. Two sequences of H1 and H2 are adopted to trigger HCR amplification. A large amount of linear DNA concatemer are formed which could change the interfacial properties of the electrode. Interfacial charge transfer resistance difference ( R ct ) is probed via electrochemical impedance spectroscopy (EIS) and Randles equivalent circuit. After amplifying via HCR, oligonucleotides with negatively charged repelling [Fe(CN) 6 ] 3−/4− ions can form a spatial blockage. HCR amplification strategy markedly enhanced the electrochemical signal with a limit of detection (LOD) down to 4.63 fM (S/N = 3). This strategy exhibited excellent selectivity for three different miRNAs: miR-199a, miR-141, and miR-155. Moreover, results show that the proposed method can be applied to miR-21 detection in the total RNA extracted from five cells. This work presents an enzyme-free and label-free EIS nucleic acid sensor for sensitively and selectively detecting miR-21, offering a promising approach in early diseases diagnosis.
研究领域:
生物化学
·
分析化学
·
生物技术
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Fengyuan Zhang,Weiqu Liu,Liyan Liang,Shuo Wang,Hongyi Shi,Yankun Xie,Maiping Yang,Ke Pi
For waterborne coating, there is still inevitable defects (insufficient anti-corrosion performance). In this paper, the functional graphene oxide (TDPG) is prepared via self-prepared polymer (triethylene tetramine-polyethylene glycol diglycidyl ether). The TDPG is used to modify waterborne polyurethane (WPU) coating for improving anti-corrosion property. The electrochemical impedance spectroscopy and salt spray test are used to evaluate the corrosion resistance ability of composite coating . The WPU/ TDPG 0.05 owns optimal corrosion resistance property. After 30 days immersion in 3.5 wt.% NaCl solution, the impedance modulus Z f = 10mHz of WPU decreases to 6.17 × 10 6 Ω·cm 2 from 1.36 × 10 7 Ω·cm 2 , but the Z f = 10mHz of WPU/TDPG 0.05 decreases to 9.48 × 10 6 Ω·cm 2 from 2.39 × 10 7 Ω·cm 2 . By Tafel test, the corrosion potential of WPU/TDPG 0.05 is -0.056 v, which is more positive than that of WPU (-0.224 v). The corrosion current and polarization resistance of WPU/TDPG 0.05 are 1.30 × 10 −8 A/cm 2 and 3.4 × 10 6 Ω·cm 2 , respectively. Moreover, the adhesion strength of WPU/TDPG 0.05 decreases to 5.89 MPa from 6.69 MPa, only losing 16.96 %.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2014
·Vol. 139
·期 21
·5482-5487
·
IF 3.906
Hanping He,Xiaoqian Peng,Min Huang,Gang Chang,Xiuhua Zhang,Shengfu Wang
A small molecule modified sensor was developed for the detection of XGG trinucleotide repeats (X = C, T) by electrochemical impedance spectroscopy. The sensor (NCD/MPA/Au) was fabricated by immobilizing the nucleic acid recognition molecule (NCD) on the surface of a gold electrode through a condensation reaction between the amino-terminal end of the NCD linker and carboxylic groups in 3-mercaptopropionic acid that were self-assembled on the electrode surface. After the sensor was incubated with trinucleotide repeats, electrochemical impedance spectroscopy was performed using [Fe(CN)6]3−/4− as redox marker ions. XGG repeats (X = C, T) could be selectively detected based on the differences in charge transfer resistance (ΔRct) even in the presence of other trinucleotide repeats. The relationship between ΔRct and lg [concentration of CGG repeats] for the sensor was linear from 1 nM to 1 μM, enabling the quantification of the number of repeats. The electrochemical impedance sensor provides a simple and rapid method to detect trinucleotide repeats without requiring labelling and immobilizations of DNA, making it promising for the early diagnosis of neurodegenerative diseases; the sensor may be further extended to the detection of other special sequences of DNA.
研究领域:
生物医学工程
·
分子生物学
·
神经退行性疾病研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYST
·
2013
·Vol. 138
·期 23
·7146-7151
·
IF 3.969
Hui-Chen Wang,Hao Zhou,Baoqin Chen,Paula M. Mendes,John S. Fossey,Tony D. James,Yi-Tao Long
A bis-boronic acid modified electrode for the sensitive and selective determination of glucose concentrations has been developed. The electrochemical characteristics of the sensor with added saccharides were investigated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The bis-boronic acid modified electrode was both sensitive and selective for glucose.
研究领域:
生物化学
·
分析化学
✓ 已验证
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）