MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Hangxi Liu,Haorong Sun,Ming Fang,Yifeng Zhang,Mingguang Kong,Zhimin Lv,Xiaoli Tan
The evaluation of the concentration of Pb(II) in solution has great significance in avoiding harm to ecology health. In this work, NH 2 -MIL-53(Fe) modified ITO glass (NH 2 -MIL-53(Fe)@ITO) was utilized as an electrochemical sensor for the detection of Pb(II) in solutions. FTIR and XPS investigation disclosed that the plentiful surface –NH group on the NH 2 -MIL-53(Fe) should be responsible for the highly efficient and selective detection abilities of Pb(II) due to the capture and conductivity abilities. The NH 2 -MIL-53(Fe) was prepared by a solvothermal technique and electrophoresed on the surface of ITO glass . A square wave voltammetry (SWV) method is employed for the sensitive determination of Pb(II). The factors of the detection condition such as the pH and ion interference are also studied. The sensitivity of 16.072 μA μM −1 cm −2 in the linear range of 2–4 μM and 54.143 μA μM −1 cm −2 in the linear range of 5–17 μM, and the limit of detection (LOD) of 0.1 μM are acquired. The repeatability and reproducibility are also studied. EIS and Tafel curves are utilized to investigate the effect of temperatures on the properties of the NH 2 -MIL-53. This work presents a facile strategy for the preparation of NH 2 -MIL-53(Fe)@ITO electrochemical sensor via electrolysis, which enhances the sensitivity toward Pb(II) and shows great application potential.
研究领域:
环境科学
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分析化学
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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
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2023
·
IF 6.1
Tianxiang Sun,Kai Jin,Wei Wang,Wen Li,Tong Wang,Tengxun Yang,Jia Cheng,Zhipeng Zhao,Shougang Chen
Here, a long-term anti-corrosive epoxy (EP) coating based on nano-hybrid filler was developed. The surface of graphene oxide (GO) was aminated with (3-aminopropyl) triethoxysilane (APTES), and then the porous covalent organic framework (COF) was in-situ grown on amino functionalized graphene oxide (FGO) nanosheets by Schiff-based reaction to prepare FGO-COF nanofillers. Different characterization methods proved the successful modification of GO nanosheets with COF particles. The excellent water resistance of composite coatings was characterized through contact angle, adhesion, and water uptake tests. Transmission electron microscope (TEM) and molecular dynamics (MD) methods showed that the grafting of COF enhanced the dispersion and compatibility of GO in the coating. EIS measurements, salt spray analysis and cathodic delamination test indicated the significant improvements in the protective properties of the composite coatings compared with pure EP coating. The low-frequency impedance modulus of 1% FGO-COF composite coating reached higher than 6.8 × 10 9 Ω·cm 2 after immersed in sea water for 60 days. In addition, the 1% FGO-COF composite coating performed only 34% delamination ratio after 120 h cathodic delamination test.
研究领域:
材料科学
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化学工程
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腐蚀科学
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 7
·1-13
·
IF 5.3
Wang Yuefan,Chen Yinzhi,Zhou Yuhe,Wang Yilin,Wu Yingjie,Xie Yixi,Zhao Pengcheng,Hu Xiayi,Fei Junjie
Rutin extracted from natural plants has important medical value, so developing accurate and sensitive quantitative detection methods is one of the most important tasks. In this work, HKUST-1@GN/MoO 3 -Ppy NWs were utilized to develop a high-performance rutin electrochemical sensor in virtue of its high conductivity and electrocatalytic activity. The morphology, crystal structure, and chemical element composition of the fabricated sensor composites were characterized by SEM, TEM, XPS, and XRD. Electrochemical techniques including EIS, CV, and DPV were used to investigate the electrocatalytic properties of the prepared materials. The electrochemical test conditions were optimized to achieve efficient detection of rutin. The 2-electron 2-proton mechanism, consisting of several rapid and sequential phases, is postulated to occur during rutin oxidation. The results show that HKUST-1@GN/MoO 3 -Ppy NWs have the characteristics of large specific surface area, excellent conductivity, and outstanding electrocatalytic ability. There is a significant linear relationship between rutin concentration and the oxidation peak current of DPV. The linear range is 0.50–2000 nM, and the limit of detection is 0.27 nM (S/N = 3). In addition, the prepared electrode has been confirmed to be useful for rutin analysis in orange juice. Graphical Abstract
研究领域:
分析化学
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材料科学
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电化学
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食品科学
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产品关联
DOI
PubMed
高影响因子
BIOPOLYMERS
·
2013
·Vol. 101
·期 5
·496-503
·
IF 2.879
Zhihong Zhang,Shunli Liu,Yu Shi,Jun Dou,Shaoming Fang
This study investigates the application of Plasma-polymerized pyrrole (ppPY) as bioactive platform for DNA immobilization and cell adhesion based on the fundamental properties of ppPY, such as chemical structure, electrochemical property, and protein adsorption. Variations in electrochemical properties of the ppPY film deposited under different plasma conditions before and after DNA immobilization were measured using electrochemical impedance spectroscopy (EIS). The equilibrium concentration of the probe DNA immobilized on the ppPY surface was deduced by detecting the variations in the surface charge transfer resistance ( R ct ) of the ppPY films after DNA immobilization with different concentrations. In addition, the detection limit of the target DNA hybridization with probe DNA, the association constant, K a , and the dissociation constant were deduced from Langmuir isotherm equations simulated using the experimental data collected by EIS. Moreover, inverted microscope was used to observe the cell adhesions onto the surface of the ppPY films prepared under different plasma conditions. Different adhesive behaviors of cells were observed, demonstrating that ppPY films could be an alternative biomaterial used as the sensitive layer for DNA sensor or cell adhesion. © 2013 Wiley Periodicals, Inc. Biopolymers 101: 496–503, 2014.
研究领域:
生物材料
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电化学
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分子生物学
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细胞粘附
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Xiangchao Zhao,Yuansong Luo,Xiujian Zhao
NASICON-type solid electrolyte Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP) has become an excellent substitute for organic liquid electrolytes due to its high ionic conductivity and exceptional air stability. However, its application is limited by its poor sintering characteristics and high grain boundary resistance. In this study, TeO 2 was introduced into LATP as a sintering aid to promote its sintering, and its properties were measured by XRD , SEM, XPS, EIS and dilatometry . The results show that the addition of TeO 2 can form eutectic liquid phase in LATP ceramic pellets during sintering, thus effectively promoting particle sintering. Not only the grain size was greatly increased, but also grain boundary and pore defects were reduced. With the help of TeO 2 , the performance of LATP is greatly improved when sintered at only 750 °C, the relative density and total ionic conductivity reached 90.64% and 0.207 mS/cm, respectively. The highest total ionic conductivity of 0.279 mS/cm and the highest relative density of 93.81% were obtained when sintered at 800 ℃ and 950 ℃, respectively. However, due to the volatilization of Li and Te at high temperature, the relative density and total ionic conductivity of LATP with TeO 2 added sintered at high temperature have only a small increase compared to that without addition. In conclusion, this study provides a feasible scheme for improving LATP performance.
研究领域:
材料科学
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电化学
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固体物理
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DOI
高影响因子
Energy Storage Materials
·
2024
·
IF 18.9
Rongzheng Tian,Shan Yin,Zhenyu Wang,Kai Liu,Lianqi Zhang,Lingyun Zhu
Single-crystal LiNi x Co y Mn 1-x-y O 2 (SC-NCM) cathodes design is an effective solution for enhancing electrochemical performance of all-solid-state lithium battery (ASSLBs). For highly Ni-rich SC cathode (Ni>90 %), the accumulation of local stress caused by anisotropic lattice shrinkage at deeply charging state is more destructive, and even SC-NCM design can not prevent the structure damage and interfacial contact failure between cathode and solid electrolyte (SE). In this work, small-size single-crystal design and Al-doping strategy are firstly combined to synthesize LiNi 0.91 Co 0.04 Mn 0.04 Al 0.01 O 2 (S-SC-NCMA) cathode. Electrochemistry test, CP-SEM, GITT and in-situ EIS techniques are combined to reveal the interfacial evolution of cathode/SE. The kinetic limitation caused by local contact failure of cathode/SE and the formation of intergranular crack under high voltage are the main reason for capacity loss of ASSLBs. Small-size single-crystal design can reduce the volumetric strain effect and Al-doping strategy can further inhibit lattice shrinkage to improve contact. This work provides an effective cathode modification strategy for highly Ni-rich NCM (Ni>90 %) cathode to improve high-voltage performance of sulfide-based ASSLBs.
研究领域:
材料科学
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电化学
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储能技术
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锂离子电池
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Yankun Xie,Chunhua Liu,Weiqu Liu,Liyan Liang,Shuo Wang,Fengyuan Zhang,Hongyi Shi,Maiping Yang
In the past decades, graphene oxide (GO) exhibited great potential for enhancing the performance of polymer composites . Homogeneous dispersion of GO sheets in the polymer matrix was still a main challenge for the application of GO materials. In this paper, the polyacrylate functionalized GO (PA-GO) was prepared through free-radical copolymerization technology, with the aim to enhance the dispersion of GO in epoxy coatings. Fourier transform infrared (FT-IR), 1 H-nuclear magnetic resonance spectroscopy ( 1 H-NMR), Raman, thermogravimetric analysis (TGA), scanning electron microscope (SEM) and transmission electron microscope (TEM) were conducted to inspect the structure and micromorphology of GO and PA-GO nanosheets . The results affirmed that the polyacrylate polymer has successfully grafted onto graphene oxide. The SEM results revealed that the GO nanoplatelets exhibited significantly improvement in the dispersion and interfacial interaction in the epoxy matrix after modification with polyacrylate polymer. Electrochemical measurements were also employed to evaluate the corrosion resistance of GO-based epoxy composite coatings . The EIS results indicated that the impedance modulus at low frequency (0.01 Hz) of epoxy coating containing PA-GO was increased by almost two orders of magnitude compared to the neat epoxy, demonstrating that the corrosion resistance of epoxy coating was significantly improved after introduction of PA-GO. Besides, the Tafel results showed that the corrosion rate of epoxy coating was also decreased from 4.814 × 10 −7 mm/year to 1.701 × 10 −8 mm/year, which also indicated that the incorporation of PA-GO effectively strengthened the corrosion protection performance of epoxy coating.
研究领域:
材料科学
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化学工程
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腐蚀科学
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高分子科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Ruxia Song,Shihong Zhang,Yi He,Bo Liu,Hongjie Li,Zhifei Zhang,Yahui He
In this study, a novel Ni-Cu/OH-BN(h)-PA-Zn-DCD composite coatings with excellent wear resistance and corrosion resistance was developed, which may be used in the field of seawater corrosion. By the self-assembling of phytic acid, Zn 2+ and dicyandiamide to grow PA-Zn-DCD structure onto the surface of hydroxylated BN(h) nanosheets, obtained a hybrid denoted as OH-BN(h)-PA-Zn-DCD, which was doped into Ni-Cu coating by pulse electrodeposition. The results show that OH-BN(h) and OH-BN(h)-PA-Zn-DCD hybrids affect the surface morphology, roughness, microcrystals size and thickness of the composite coatings. Simultaneously, compared with NC coating and NC/HB-1.5 coating, NC/BP-1.5 coating has the highest microhardness (559.26 Hv), the lowest friction coefficient (0.172), and the best corrosion resistance (i corr is 3.551 × 10 −8 A·cm −2 , R ct is 1.098 × 10 6 Ω·cm 2 ). In addition, the EIS results of the immersed specimens showed that the NC/BP-1.5 composite coating still has good protective ability after soaking for 15 days in simulated seawater medium (R ct is 7.434 × 10 6 Ω·cm 2 ).
研究领域:
材料科学
·
表面工程
·
腐蚀科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Changying Cao,Quanhong Chang,Huijie Qiao,Runze Shao,Xin Guo,Guina Xiao,Wangzhou Shi,Lei Huang
The diffusion of generated H + ions in glucose sensing process is critical for the sensitivity of sensor. Although many glucose sensors assembled by two dimensional (2D) materials (MXene, graphene, MoS 2 et al.) have been extensively studied, the detailed analyses about the diffusion of H + ions are still rarely reported. Herein, hybrid Ti 3 C 2 -rGO film is fabricated by electrostatic self-assembly utilizing the 2D Ti 3 C 2 and graphene sheets to focus on the H + ion’s diffusion dynamic properties related to the sensing performance. Through controlling the graphene content, this hybrid Ti 3 C 2 -rGO film provide the effective H + ion diffusion channels. Based on the comprehensive analyses of cyclic voltammogram (CV) and electrochemical impedance spectroscopy (EIS), the corresponding localized conduction and enzymatic reaction at interfaces between the Ti 3 C 2 -rGO electrodes and glucose solution were investigated. According to the Warburg impedance in Nyquist plot from EIS, it is certified that the H + ion diffusion in low frequency range may play a significant role in the sensing mechanism of the glucose sensor. Moreover, the relationship derived from the interaction including interlayer spacing, H + ion diffusion and the sensing performance further reveal the H + ion diffusion as the dominant origin of the enhanced glucose sensitivity. This analysis will provide fundamental insight into the electrode structures assembled with 2D materials to optimize the sensor design in terms of ion transport dynamics.
研究领域:
材料科学
·
电化学
·
传感器
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Chenyang Zhao,Chen Wang,Yue Li,Wenlin Yuan,Yi Huang,Di Cheng,Tao Shen,Ji Zhang,Jie Liu,Libei Jiang,Chao Yang,Qianhong Shen,Hui Yang
Two-dimensional Metal-organic frameworks have recently emerged as promising materials for enhancing the anticorrosion protection performance of polymeric coatings. In this study, ZIF-ZG@PEG-GA nanofiller was synthesized by modifying zeolitic imidazolate framework nanosheets with a polyethylene glycol-gallic acid (PEG-GA) complex shell, and subsequently incorporated into waterborne epoxy matrix. Potentiodynamic polarization analysis revealed that the addition of ZIF-ZG@PEG-GA to a 3.5 wt% NaCl solution reduced the corrosion current density from 5.528×10 −6 A/cm 2 to 1.892 × 10 −6 A/cm 2 . Electrochemical impedance spectroscopy (EIS) analysis revealed that ZGPG/EP exhibited superior protective performance after 42 d of immersion, with the highest |Z| f=0.01Hz (1.87 × 10 9 Ω·cm 2 ), R coat (4.27 × 10 8 Ω·cm 2 ), and R ct (1.43 × 10 9 Ω·cm 2 ). Furthermore, EIS analysis of scratched coatings demonstrated that ZIF-ZG@PEG-GA effectively impeded corrosion propagation and prevented further coating degradation. The enhanced anticorrosion performance is attributed to the passive protection by increasing the diffusion resistance of corrosive species, and the active protection through the release of gallic acid from the PEG-GA complex.
研究领域:
材料科学
·
腐蚀工程
·
纳米技术
·
高分子科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2014
·Vol. 139
·期 19
·4917-4923
·
IF 3.906
Hongmei Cao,Daixin Ye,Qianqian Zhao,Juan Luo,Song Zhang,Jilie Kong
A novel strategy for the quantitative determination of human colon cancer DLD-1 cells utilizing an electrochemical aptasensor was developed by effective surface recognition between Mucin 1 glycoprotein over-expressed on the cell membrane and MUC-1 aptamer (MUC-1) bound on carbon nanospheres (CNSs). An MTT assay revealed that the as-prepared CNSs by green route exhibited satisfactory biocompatibility for cell viability, providing a suitable platform for the cell adhesion study. Furthermore, using CNSs as a sensing layer accelerated electron transfer and provided a highly stable matrix for the convenient conjugation of target MUC-1 aptamer, considerably amplifying the electrochemical signals. Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) were applied to assess the optimal conditions and detection performance of the as-fabricated aptasensor. The attachment of colon cancer DLD-1 cells onto the MUC-1 aptamer immobilized CNSs led to increased EIS responses, which changed linearly in cell concentration ranging from 1.25 × 102 to 1.25 × 106 cells per mL with a lower detection limit of 40 cells per mL. With this method, colon cancer DLD-1 cells can be easily distinguished from normal cells, Human astrocytes 1800. The novel aptasensor revealed high specificity to DLD-1 cells. Furthermore, the aptasensor described here showed good reproducibility and high stability because of the CNSs of high stability and biocompatibility. The proposed protocols are a promising technique for the early monitoring of human colon cancer, and might have potential clinical applications such as cancer diagnosis, drug screening.
研究领域:
生物传感器
·
电化学
·
癌症诊断
·
纳米技术
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zihua Wang,Chijia Wang,Weihao Fan,Shuyi Liu,Kaka Li,Hongxin Luo,Shupei Liu,Huaiyuan Wang
A robust bifunctional platform (FA-PANI-Fe-F) with both shielding performance and corrosion inhibition activity was prepared and observed for its structure and morphology. During the corrosion test , Fe 2+ /Fe 3+ and perfluorinated groups effectively strengthened the shielding performance and corrosion inhibition activity of the coating. The results show that the perfluorinated group not only improved the hydrophobic performance of the functional filler but also provided effective inhibition against corrosion for the anode area. In addition, Fe 2+ /Fe 3+ resulted in the functional filler exhibiting anodic protection and cathodic inhibition properties, thereby forming a dense metal passivation film between the coating and the substrate interface. After the EIS test, the |Z| 0.01 Hz value of FPF-Fe 10% C still reached 7.91 × 10 8 Ω·cm 2 . Additionally, the FPF-Fe 10% C showed a lower cathodic corrosion trend in the SVET test, which indicated that Fe 2+ /Fe 3+ effectively inhibited the corrosion process in the cathode region. This study is expected to open new insights into the anti-corrosion inhibition process between the interior of the coating and the metal substrate, and prepare a robust bifunctional filler platform with long-term corrosion resistance .
研究领域:
材料科学
·
腐蚀工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）