检索结果-南通市图书馆

Sensitive and selective molecularly imprinted electrochemical sensor based on multi-walled carbon nanotubes for doxycycline hyclate determination

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2020年第1期31卷 185-188页

作者： Zeyu Xu Xingxing Jiang Shuping Liu Minghui Yang Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety College of Chemistry and Chemical EngineeringCentral South University

An electrochemical sensor for doxycycline hyclate(DC)detection with high sensitivity and good selectivity is *** sensor was fabricated by electro-polymerization of molecularly imprinted polymers(MIPs)in the presence of DC onto multi-walled carbon nanotubes modified glassy carbon electrode(MWCNTs/GCE).The MWCNTs can significantly increase the current response of the sensor,leading to enhanced *** MIPs provide selective recognition sites for DC *** experimental parameters,such as the polymer monomer concentration,supporting electrolyte pH,the time for electro-polymerization and the incubation time of the sensor with DC were *** optimized experimental conditions,the sensor displayed a linear range of 0.05μmol/L-0.5μmol/L towards DC detection,with the detection limit of 1.3×10^-2μmol/*** sensor was successfully applied for recovery test of DC in human serum samples.

关键词： electrochemical sensor Doxcycline hyclate Molecularly imprinted polymers Multi-walled carbon nanotubes Electro-polymerization

Preparation of cauliflower-like bismuth sulfide and its application in electrochemical sensor

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2008年第5期19卷 585-588页

作者： Qing Xiang Wang Feng Gao Shun Xing Li Wen Weng Zheng Shui Hu Department of Chemistry Zhangzhou Normal University Zhangzhou 363000 China College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 China

A solvothermal process was developed for the preparation of cauliflower-like Bi2S3 from N,N-dimethylformamide （DMF） solution of bismuth nitrate [Bi（NO3）3.5H2O] and thioacetamide （TAA） with 2-undecyl-1-dithioureido-ethyl-imidazoline （SUDEI） as the morphology-controlling agent. The obtained Bi2S3 products were characterized by transmission electron microscopy （TEM）, scanning electron microscopy （SEM）, and X-ray diffraction （XRD）, etc. The sensing properties of Bi2S3 with different morphologies were evaluated by the electrochemical analysis of dopamine （DA） and ascorbic acid （AA） coexisting solution. The results showed that cauliflower-like Bi2S3 showed a better resolving ability than rod-like Bi2S3 for the simultaneous determination of DA and AA,

关键词： Bismuth sulfide Solvothermal synthesis electrochemical sensor

A polyoxometalate based electrochemical sensor for efficient detection of L-cysteine

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Tungsten 2022年第2期4卷 138-148页

作者： Ming-Yue Chu Jia Jiao Wei Zhu Xin Yang Ting-Ting Yu Gui-Xin Yang Hui-Yuan Ma School of Material Science and Chemical Engineering Harbin University of Science and TechnologyHarbin150040China College of Chemical Engineering Harbin Institute of PetroleumHarbin150028China

L-cysteine(L-cys),as an important sulfur-containing amino acid,plays an indispensable role in biological *** low and excessively high ratio of L-cys will cause harm to the function of human ***,it is very necessary to develop efficient methods to detect it in multifarious *** paper has built an electrochemical sensor by combining Keggin-type polyoxometalate(PMo9V3)and cobalt tetrasulfonate(Ⅱ)phthalocyanine(CoTsPc)on indium tin oxide electrodes using the layer-level self-assembly technology for efficiently detection of *** assembly process and surface morphology of the modified electrode was characterized by ultraviolet–visible spectroscopy,X-ray photoelectron spectroscopy,scanning electron microscope,and atomic force *** conditions of electro-catalysed oxidation of L-cys were optimized by cyclic voltammetry,and the kinetic electrochemical parameters were also evaluated by electrochemical impedance ***,the sensing performance of the modified electrode was explored using *** proposed electrochemical L-cys sensor was found to have superior sensing performance with a range of linear response of 2.5×10^(−7) to 1.7×10^(−4) mol·L^(−1) and 1.7×10^(−4) to 39.5×10^(−4) mol·L^(−1),the detection limit of 1.0×10^(−7) mol·L^(−1)(signal/noise=3),and satisfactory anti-interference ***,the fabricated sensor has the potential to be applied in laboratory practices for L-cys deterimination in commercial drinks.

关键词： L-cysteine Phosphomolybadate Cobalt(II)tetrasulfonate phthalocyanine electrochemical sensor

Development of Non-enzymatic Cholesterol electrochemical sensor Based on Polyindole/Tungsten Carbide Nanocomposite

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Analysis and Testing 2020年第1期4卷 13-22页

作者： Shubham Sharma Preeti Joshi Sameena Mehtab Md.Ghulam Haider Zaidi Kavita Singhal Tanveer Irshad Siddiqi Department of Chemistry College of Basic Sciences and HumanitiesG.B.Pant University of Agriculture and TechnologyPantnagarUttarakhand 263145India Department of Chemistry D.I.T UniversityMussoorie Diversion RoadMakkawalaDehradunUttarakhand 248001India

Non-enzymatic electrochemical sensor was developed for estimation of low-level ***/tungsten carbide(PIN/WC)nanocomposite was synthesized and used as an electroactive material to develop low-cost modified stainless steel plate electrode(SSPE).Surface morphology of developed electrode was characterized by scanning electron *** behavior of cholesterol was investigated through electron impedance spectroscopy,potentiodynamic polarization and cyclic voltammetry in 1-M KOH electrolytic *** quantification of cholesterol was studied by square wave voltammetry and differential pulse *** calibration plots between the cholesterol concentration and peak current were in linear relation with limit of detection of 1.23×10^(−6) mol L^(−1).The overall result reveals that developed PIN/WC/SSPE electrode has excellent performance for trace-level cholesterol estimation and can be further employed for cholesterol monitoring in blood serum samples.

关键词： electrochemical sensor Polyindole Nanocomposite Cholesterol Voltammetric techniques

Conductive MOFs for electrocatalysis and electrochemical sensor

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

eScience 2023年第6期3卷 23-35页

作者： Kang-Kai Liu Zheng Meng Yu Fang Hai-Long Jiang State Key Laboratory for Chemo/Bio-Sensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha410082HunanChina Department of Chemistry University of Science and Technology of ChinaHefeiAnhui230026China Innovation Institute of Industrial Design and Machine Intelligence Quanzhou-Hunan University Quanzhou362801FujianChina

Two-dimensional conductive metal–organic frameworks(2D-cMOFs)are a class of 2D layered MOFs with excellent electrical conductivity and other electronic *** recent years,their porous structure and dense active sites have been widely used in electrocatalysis and electrochemical *** large electron delocalization domains generated by an extendedπ-conjugated framework through the covalent bonding between metal and organic ligand endow them with unique high *** despite a few promising applications,current research rarely addresses their“structure–property relationship.”This review discusses the rational design of 2DcMOFs with extraordinary electrochemical *** introduce several representative 2D-cMOFs and describe their applications,focusing on electrochemical catalysis and small molecule *** correlating the performance of the current materials in these applications and the corresponding mechanisms,we aim to uncover the key structural features that lead to their engineered properties and functions.

关键词： Metal-organic framework Electrocatalysis electrochemical sensor Conductive Two-dimensional

Melamine-imprinted electrochemical sensor of graphene/ionic liquid composites and its use for the detection of melamine in dairy products

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

ChemPhysMater 2022年第3期1卷 195-202页

作者： Peini Zhao Xiaolai Zhang Jingcheng Hao Key Laboratory of Colloid and Interface Chemistry&Key Laboratory of Special Aggregated Materials Shandong UniversityMinistry of EducationJinan 250100China

By exchanging the conventional role of functional monomer and template molecules,we develop a new molecu-larly imprinted nanospheres with grape grain structures based on multi-hydrogen bonding interactions between melamine and *** imprinting-electrochemical sensor was established with the assistance of graphene and ionic *** content of melamine in dairy products was detected by the molecular imprinting-electrochemical *** detection limit was determined to be as low as 1.57×10^(−3) mg kg^(-1).

关键词： Molecular imprinting Graphene Ionic liquid electrochemical sensor Dairy product

Establishing Lable-Free And “Signal-on” electrochemical sensor Based On DNA Walker Driven By Nicking Endonuclease

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Establishing Lable-Free And “Signal-on” Electrochemical Se...

A novel electrochemical sensor based on three-dimensionally ordered macroporous TiO2 for the determination of Vanillin in food additives

河南省化学会2018年学术年会

作者： Sheng Lei Baoxian Ye College of Chemistry and Molecular Engineering Zhengzhou University

Many different DNA walker designs have previously been presented in the *** demonstrations have included walkers driven by strand exchange reactions[1],DNAzyme-mediated DNA hydrolysis[2],and nicking enzymes[3].In this work,we presented a lable-free and "signal-on" electrochemical ***,two types of DNA probes were immobilized on the Au electrode. In the presence of thrombin,the terminally protected DNA walkers were prowered by nicking endonuclease,and they exhibited autonomous cleacage behavior on the surface of the substrate DNA-modified electrode. Subsequent the cleavage of the nicking endonuclease results in recycling of the cyclic cleavage of the hairpins,liberating many free G-quadruplex forming sequences. Hemin can further bind these sequences to form G-quadruplex/hemin complexes on the sensor electrode and generate enhanced current output for the detection of low level of thrombin in a simple fashion.

关键词： Lable-Free Signal-on DNA walker electrochemical sensor

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

A novel electrochemical sensor based on three-dimensionally ...

Selective and sensitive determination of theophylline by molecularly imprinted polymer based electrochemical sensor

中国化学会第十三届全国分析化学年会

作者： Meiting Wei Jiangyan Du College of Chemistry and Materials Science Nanjing Normal University Jiangsu Collaborative Innovation Center of Biomedical Functional Materials

In this work,A three-dimensionally ordered macroporous (3DOM) TiO modified electrode was fabricated by the template method on the indium tin oxide (ITO) *** morphology and elelctrochemical properties of the modified electrode were characterized by SEM,CV,CC,LSV,EIS and *** the optimized condition,the oxidation peak current of VA was found to be linearly proportional to the concentration of VA in the range of 5×10～4×10mol L with a detection limit of 4.9×10 molL (S/N=3).In addition,the modified electrode was successfully used for the quantitative determination of VA in food samples with high sensitivity,rapid electrochemical response and low *** result is satisfactory.

关键词： Vanillin 3DOM TiO2 modified electrode electrochemical sensor

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Selective and sensitive determination of theophylline by mol...