SURFACE & COATINGS TECHNOLOGY
·
2022
·
IF 4.865
Shuhan Dong,Yang Yang,Ruina Ma,An Du,Mingxu Yang,Yongzhe Fan,Xue Zhao,Xiaoming Cao
A Cu/Ni–B 4 C superhydrophobic coating was fabricated on the surface of Q235 steel under different current density via electrodeposition . The distribution of electric field influenced by current density controls the growth of rough structure. Therefore, the effect of current density was measured by the morphology and wettability of coating and analyzed by Electric field distribution model. The coating surface demonstrates the most uniform and compact rough structure at a current density of 3 A/dm 2 (M C-3 ) obtaining contact angle 160 ± 2° after the surface energy reduced by stearic acid. The self-cleaning performance and mechanical stability of M C-3 coating were studied. The potentiodynamic polarization curve (PPC) and electrochemical impedance spectroscopy (EIS) were used to measure the anti-corrosion and protection performance of the coatings with different morphology and contact angle. The protective performance of M C-3 coating soaked in 3.5 wt% NaCl solution for different time was studied by EIS. The wetting stability of different coatings was studied by single frequency impedance spectroscopy. Then the double protective mechanism of superhydrophobic coating was described and the corresponding model was established.
研究领域:
材料科学
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表面工程
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腐蚀科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 9
·3930-3946
·
IF 3.5
Miao Xin,Wang Liying,Shi Yunxin,Chen Guohua,Liu Yunfei,Wu Gaoqi,Cao Zhenzhu,Zhang Yongfeng
Microsphere 3D structure of Cu/Mn 3 O 4 @SC composite was fabricated by pyrolyzing the bimetallic CuMn-MOF, which was composed of Cu 2+ , Mn 2+ and sulfur-containing ligand 2,5-thiophene dicarboxylic acid (H 2 TDC). The composite of Cu/Mn 3 O 4 @SC is used as a high-performance anode material for the lithium-ion batteries cycle exhibiting stable capacities of 715 mAh g −1 after 100 cycles at 200 mA g −1 and outstanding long cycle performance with a reversible capacity of 508 mAh g −1 at 0.5 A g −1 after 500 cycles. The superior performance for the Cu/Mn 3 O 4 @SC anode is mainly attributed to the mutual supporting characteristics of heterojunction synergistic effect, thus avoiding damage in the process of energy storage process. In addition, the kinetic analysis based on CV reveals that the transport kinetics mechanism of the Cu/Mn 3 O 4 @SC is synergistically controlled by the surface capacitive and pseudocapacitive behaviors. The EIS proves that the introduction of Cu enhances the conductivity of the material and the rate of lithium-ion diffusion. Graphical abstract Cu- and S-doped multielement microspheres was fabricated by pyrolyzing CuMn-MOF supported by 2, 5-thiophene dicarboxylic acid.
研究领域:
材料科学
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电化学
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纳米技术
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能源存储
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无机化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Hankun Tan,Li Sun,Feng Xie,Jingjing Hu,Yaru Qu,Yihe Zhang
An alkali-treated MXene-SnS hybrid was prepared through hydrothermal methods. The Alk-MXene microplates provide highway for electronic transport, and the 3D wrinkled morphology ensures sufficient channels for Li + diffusion. The alkali treatment of MXene gives Alk-MXene@SnS enhanced binding strength, which allows the SnS nanosheets to remain firm binding with the Alk-MXene substrate during cycling and overcome capacity decay caused by large volume change. The synergy between the two components guarantees the hybrid excellent electrochemical properties by enabling high electronic/ionic conductivity and superior kinetic properties as evidenced by EIS, GITT tests and DFT calculation. As a result, the Alk-MXene@SnS retains specific capacities of 519 mAh/g after 100 cycles at 200 mA g −1 , and 330 mAh/g at the high rate of 8000 mA g −1 . In addition, a reversible capacity of 421 mAh/g can be provided after long term cycle test at 1000 mA g −1 for 800 cycles.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2020
·Vol. 58
·期 21
·3031-3041
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IF 0
Zhentao Hao,Chuchu Chen,Ting Shen,Jiaxing Lu,Hao-Cheng Yang,Weihua Li
Slippery liquid-infused porous surface (SLIPS) is a rising star in corrosion protection owing to its outstanding corrosive medium resistance and self-healing property. The large-area and facile fabrication of SLIPS remains a challenge lying on the way of its practical application. Herein, we develop a novel SLIPS based on a porous polyvinylidene fluoride (PVDF) substrate fabricated by thermally induced phase separation. A sphere-packing structure can be easily obtained by blade-coating followed by cooling. The SLIPS exhibits an extremely low sliding angle of 5.8° so that it can resist the fouling of even the Chinese ink, ascribing to its slippery dynamic surface with low surface energy. We also evaluated the anti-corrosion performance of the SLIPS and superhydrophobic PVDF coating by electrochemical impedance spectroscopy (EIS) and scanning Kelvin probe technique (SKP), both of which exhibited enhanced corrosion resistance in 3.5 wt% NaCl solution due to the physical oil and air barriers against the corrosive medium penetration. Nevertheless, the SLIPS coatings performed outstanding self-healing properties because of the high fluidity of infused oil to recover the surface damages, and the self-healing process was recorded by the SKP. Graphical The current research presents a novel slippery liquid-infused porous surface (SLIPS) based on porous polyvinylidene fluoride (PVDF) structure fabricated by thermally induced phase separation (TIPS). This SLIPS performs outstanding self-cleaning and has anti-corrosion properties owing to its fluid surface. Most importantly, it can be selfrepaired if damaged, benefiting from the fluidity of the infused liquid.
研究领域:
材料科学
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表面工程
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腐蚀科学
✓ 已验证
DOI
OPTICAL MATERIALS
·
2021
·
IF 3.08
Kun Jiang,Jin Zhang,Yingfei Wan,Zengjian Liu,Jinwei Chen
In order to obtain the advanced photocatalyst with high performance for removing the gaseous formaldehyde, a new strategy with amination of titanium dioxide (TiO 2 ) and combination with reduced graphene oxide (rGO) is proposed in this work. TiO 2 was first aminated into amino-TiO 2 and then combined with rGO by an electrostatic self-assembly process to form the amino-TiO 2 /rGO photocatalysts. The structure and morphology were characterized by XRD , FTIR, and SEM, respectively. Physicochemical properties were measured by EIS, XPS , ESR , PL , and photocurrent measurements. The mechanism of the photocatalytic reaction was studied. Optimal amino-TiO 2 /rGO catalyst exhibits high catalytic activity and recyclability. The reaction rate constant of HCHO over this catalyst is approximately 9.8 × 10 −3 L mol −1 ·min −1 , which is 10.5 times higher than that of the commercial Degussa P25 TiO 2 . The analysis results from XPS and ESR indicates that the high catalytic activity could be mainly attributed to the imine formed by chemisorption of amino and HCHO. The reaction speed of formaldehyde photolysis increases as the concentration of HCHO on the photocatalyst surface increased. In addition, the introduction of graphene enhances carrier separation efficiency so that leads to more reactive radicals such as hydroxyl radicals (·OH) and superoxide radicals (·O 2 − ), leading to improved performance on formaldehyde photolysis. This could provide a useful method for highly efficient formaldehyde photocatalysis .
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2017
·
IF 6.065
Xuhui Sun,Kexin Zu,He Liang,Lin Sun,Lingyun Zhang,Chuanyi Wang,Virender K. Sharma
Passivation of anode is a main challenge in the electrochemical synthesis of ferrate(VI) (Fe VI O 4 2− , Fe(VI)). A series of electrochemical approaches were employed including polarization curve, cyclic voltammetry, and electrochemical impedance spectroscopy (EIS) to analyze the physicochemical processes involved in electrochemical synthesis of Fe(VI) using sponge iron and cast iron anodes. The results demonstrate that the sponge iron anode achieved higher yield of Fe(VI) compared to grey cast iron anode. The optimum condition to generate Fe(VI) using sponge iron was 35–50 °C and 30 mA/cm 2 . Significantly, the sponge iron anode could generate Fe(VI) for a long duration (>10 h) under these conditions; possibly suitable for large scale synthesis of Fe(VI). The prepared Fe(VI) solution was used to treat antibiotic (sulfamethoxazole (SMX)) and pesticide (atrazine (ATZ)) in water. At a molar ratio of Fe(VI) to SMX as 20:1 in the pH range from 5.0 to 9.0, almost complete oxidative transformation of SMX could be obtained. Comparatively, oxidative transformation of ATZ was incomplete (∼70%) even when [Fe(VI)]:[ATZ] = 87 at pH 5.0–9.0. Fluorescence spectra and cytotoxicity studies suggest that the oxidative transformation products of both SMX and ATZ possess lower toxicity than the parent antibiotic and pesticide, respectively.
研究领域:
环境化学
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电化学
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水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Zhehan Yang,Zhenjia Yang,Xiaoshu Lv,Guangming Jiang,Xiaolong Zhang,Xiaodan Li,Xiaoyu Li,Ruo Yuan,Ying Zhuo
Quantifying trace markers in clinical samples with electrochemical impedance spectroscopy (EIS) biosensors is limited mainly by ubiquitous biofouling because traditional antifouling coatings suffer from low stability and unsatisfactory antifouling capability etc. Herein, a simple and effective strategy was constructed to achieve a highly specific EIS biosensing platform for quantifying protein and DNA in serum by using single-stranded oligonucleotides (ssDNA) as antifouling coating. To achieve the optimized antifouling capability of ssDNA coating, the influence factors of ssDNA structure are investigated by combining electrochemical experiments with theoretical calculations. The results demonstrated that the chemical adsorption of adenine on the Au surface is stronger than that of the other three bases, which endows the poly adenine-ssDNA (polyAn) coating with outstanding antifouling capability. Importantly, we found that the capture ligand structure and ssDNA length remarkably affected the antifouling capability of polyAn because of steric hindrance. As a proof of concept, EIS biosensors based on polyAn antifouling coating were developed to detect target DNA and nuclear factor kappa b p65 (NF-kB p65), respectively, exhibiting outstanding capability of detecting DNA and NF-kB p65 in human serum with low interference and good accuracy. Overall, the presented work may contribute to a deeper understanding of the influence factors of ssDNA-based antifouling coating and holds great insight into the construction of highly specific biosensors for quantifying disease markers in clinical samples.
研究领域:
生物传感器
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分析化学
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生物化学
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分子生物学
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临床诊断
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Lei Dai,Peng Fu,Jieming Chen,Fazhe Sun
The band gap width has always been the main reason for the low photocatalytic performance of TiO 2 semiconductors. “Band gap engineering” is often used to change the band gap width of TiO 2 . On this basis, the impurity band gap was induced below the TiO 2 conduction band by regulating N element. What's interesting was that N element adjusted the valence state of adjacent Ti element and caused the generation of oxygen vacancy . This is due to the extraction of neutral oxygen atoms, resulting in electron transfer to the Ti cation band structure . The 300-N-T catalyst exhibited the best photocatalytic hydrogen production performance under visible light, which was 307.65 μmol/(g·h) and was 61.53 times higher than that of anatase. And the concentration of Ti 3+ defects and oxygen vacancy reduced with decreasing of N content in TiO 2 . According to Kubelke Munk formula, the band gap of 300-N-T photocatalyst was narrowed to 2.73 eV, which indicated that there are impurity energy levels near the CB and VB of TiO 2 material. The Ti 3+ ions as the active site of the photocatalytic reaction was confirmed by instantaneous photocurrent response and EIS characteristic. This study revealed the structure-activity relationship between the content of N element, Ti 3+ ions and oxygen vacancy in TiO 2 materials, as well as the decisive process of defect induced visible light catalysis.
研究领域:
材料科学
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催化
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光催化
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能源材料
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Chunling Li,Xiyu Zhao,Cheng Meng,Tengfang Zhang,Shuangqing Sun,Songqing Hu
The stimuli-responsive release could reduce the waste of the corrosion inhibitor and realize the accurate repair of corroded region. In this work, hollow mesoporous organosilica nanoparticles (HMON) were first synthesized by silica-etching chemistry tailoring method. Then, HMON were encapsulated with 2-mercaptobenzothiazole (MBT) corrosion inhibitor molecules to build an intelligent corrosion inhibitor system, i.e., MBT@HMON. The microstructure and frame composition of the synthesized HMON were characterized. After the successful encapsulation of MBT into HMON, the release kinetics of MBT from HMON under different dithiothreitol (DTT) concentration and pH conditions were investigated. Finally, the corrosion inhibition performance of MBT@HMON for copper alloy was evaluated in 3.5 wt% NaCl solution by weight loss test and electrochemical impedance spectroscopy (EIS). The results show that the controlled release of corrosion inhibitor MBT from HMON could be realized by tuning the redox and pH conditions of corrosion medium. When the appropriate concentration of MBT@HMON was added into the corrosion medium (1.6 g·L −1 in this work), the corrosion of cooper alloy was greatly inhibited. This simple and general strategy of introducing corrosion inhibitors loaded HMON directly into the corrosion medium offers a new prospect for the application of nanocontainers in the intelligent corrosion protection of metallic materials.
研究领域:
材料科学
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腐蚀科学
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纳米技术
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化学工程
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2025
·
IF 2.6
Zhan Qu,Muhammad Noman Bashir,Miaomiao Wang,Yating Chen,Beenish Noureen,Zhiyao Wang,Yage Liu,Liping Du,Chunsheng Wu
Adenosine triphosphate (ATP) is crucial for cellular activity. The need for ATP detection in the field of biomedicine is on the rapid rise. Several biosensor-based approaches have been developed as a result of the growing demand for ATP detection. An electrolyte-insulator-semiconductor (EIS) sensor is a type of field-effect device that has the ability to detect surface-potential changes with a specific level of sensitivity. In this study, a label-free ATP detection biosensor that is based on poly(amidoamine)-modified EIS sensors was developed, in which ATP-sensitive aptamer (Apt) was utilized as sensitive element and EIS sensor was used as transducer. It is possible to monitor the binding of charged molecules, such as aptamers using EIS sensors in a label-free manner with a straightforward setup. To improve the coupling efficiency of Apt with EIS sensor, positively charged polyelectrolyte, i.e. poly (amidoamine) (PAMAM) dendrimers, was utilized to modify the surface of the EIS sensors to attach the negatively charged Apt based on electrostatic attraction. The adsorptive binding of Apt and ATP results in a change in capacitance of EIS sensor. During the process of surface modification, the electrochemical measurements. of capacitance-voltage (C-V) curves and constant-capacitance (ConCap) characteristics were utilized as indicators for the corresponding processes of EIS sensor surface modification. The measurements results indicated this biosensor was able to detect ATP with high sensitivity and good specificity. The detection range of ATP was 0.1. nM to 100. nM and the detection limit was as low as 0.12 nM. This biosensor has the potential to be utilized in the detection of ATP in the surrounding microenvironment of cells and tissues, which have promising prospects to be applied in the field of biomedicine such as energy and metabolism monitoring of cells and tissues.
研究领域:
生物医学工程
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分析化学
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生物传感器
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CONTROL
·
2022
·
IF 6.652
Yujiao Hou,Nan Long,Boyu Jia,Xiaofang Liao,Minghan Yang,Lizhu Fu,Lidong Zhou,Ping Sheng,Weijun Kong
The prevalent ochratoxin A (OTA) contamination in food has increased the urgency to develop sensitive and accurate detection methods. This study reported a conveniently fabricated label-free electrochemical (EC) aptasensor for ultrasensitive detection of OTA based on the competitive binding of OTA with its specific aptamer without any signal amplification strategy. A gold electrode (AuE) was modified with a compact layer of double-stranded DNA (dsDNA), obtained via OTA aptamer and complementary DNA (cDNA) hybridization, to act as a barrier for redox probe [Fe(CN) 6 ] 3-/4- to AuE access. This led to a high initial electron-transfer resistance (R ct ), recorded via electrochemical impedance spectroscopy (EIS). Since the aptamer displayed a higher affinity to OTA than cDNA, the added OTA triggered aptamer dissociation from AuE to form the OTA-aptamer complex, obviously decreasing the R ct . The target-induced variation in the resistance response strongly depended on the OTA concentration. Optimum conditions improved the linear relationship between R ct and the logarithm of OTA concentration in a range of 0.05–10 ng/mL with a limit of detection (LOD) of 0.05 ng/mL for OTA. Recoveries of 74.8–105% with relative standard deviations (RSDs) of 8.86–13.09% were obtained in the spiked malt samples. The Real-world detection of OTA in the actual malt samples confirmed the reliability of the convenient, cost-effective, and highly specific impedimetric aptasensor, exhibiting significant promise for extended application in food control to identify more hazardous contaminants by altering the corresponding aptamers.
研究领域:
食品科学
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分析化学
·
电化学
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Tao Hu,Zeyang Bai,Di Wang,Ying Bai,Xiao Li,Zhonghua Ni
Prostatic cancer threatens the lives and health of numerous male patients all over the world. As a single-chain glycoprotein, prostate specific antigen (PSA) can be used to perform prostate cancer screening. At present, there are still problems such as time-consuming and low sensitivity in hospital detection. At the same time, electrochemical immunosensor technology has received a lot of attention due to its benefits, including high sensitivity, good selectivity, low usage and cost, and so on. Electrocatalysts are typically used to build electrochemical immunosensors for signal amplification in the recent years to realize sensitive detection of cancer biomarkers such as PSA. In recent years, three-dimensional nanomaterials have been widely used in the study of electrocatalysts, but the study of the sensitivity for PSA detection is still very scarce. The present work reported the application of a 3D graphene aerogel(GA)/AuNPs/Nafion electrochemical platform for highly sensitive PSA quantification. The electrochemical immunosensor has been designed by immobilizing aptamers on the screen-printed electrode (SPE) surface modified by GA/AuNPs/Nafion. Scanning electron microscopy (SEM), Raman spectra, and electrochemical characterization demonstrated the successful combination of GA/AuNPs/Nafion/SPE. Based on electrochemical impedance spectroscopy (EIS), the proposed immunosensor has demonstrated excellent electrochemical performance, exhibiting sensitive and stable responses for electrochemical detection of PSA ranging from 0.05 to 50 ng∙mL −1 with a limit of detection (LOD) of 0.0306 ng∙mL −1 . This study has great potential application in PSA detection and provides a valuable reference for point-of-care testing (POCT) of prostate cancer.
研究领域:
生物化学
·
分析化学
·
生物传感器
·
癌症研究
·
材料科学
·
电化学
✓ 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）