Journal of Electroanalytical Chemistry最新文献_第9页

Revisiting the properties of lithium chloride as “water-in-salt” electrolyte for pouch cell electrochemical capacitors 重新审视作为袋状电池电化学电容器“盐包水”电解质的氯化锂的性质

IF 4.5 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2023-09-01 Epub Date: 2023-07-04 DOI: 10.1016/j.jelechem.2023.117645

Aritsa Bunpheng , Phongphot Sakulaue , Wisit Hirunpinyopas , Khanin Nueangnoraj , Santamon Luanwuthi , Pawin Iamprasertkun

{"title":"Revisiting the properties of lithium chloride as “water-in-salt” electrolyte for pouch cell electrochemical capacitors","authors":"Aritsa Bunpheng , Phongphot Sakulaue , Wisit Hirunpinyopas , Khanin Nueangnoraj , Santamon Luanwuthi , Pawin Iamprasertkun","doi":"10.1016/j.jelechem.2023.117645","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117645","url":null,"abstract":"<div>The search for alternative electrolytes is extremely topical in recent years with the “water-in-salt” electrolyte especially, lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) coming to the fore in the context of high-voltage electrolytes. However, “water-in-LiTFSI” exhibits ultra-high cost and low ionic transport when compared with the aqueous lithium- halide, -nitrate as well as -sulphate salts. This work rediscovered the properties of a “water-in-salt” made from a superconcentrated 20 m (equivalent to 14.28 M) lithium chloride electrolyte. The electrolyte was tested using various carbon-based materials as a model system, and the finding was then expanded to a pouch cell supercapacitor. It is found that the use of superconcentrated LiCl could enhance the potential window of the supercapacitor in both half-cell electrodes (approximately of 3.0 V), and pouch-cell devices (1.4 V evaluated at 100 mV s−1). This work shows the fundamental insight into the physical and electrochemical properties of LiCl for possible alternative use as a cheap “water-in-salt” electrolyte in energy storage apart from LiTFSI.</div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"944 ","pages":"Article 117645"},"PeriodicalIF":4.5,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1702467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Regulating Cu-F bonding force with cobalt phthalocyanine to boost the reversibility of CuF2 for endurable lithium-ion storage within moderate voltage-cutoff window 用酞菁钴调节Cu-F结合力，提高CuF2的可逆性，在中等电压截止窗内实现锂离子的持久存储

IF 4.5 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2023-09-01 Epub Date: 2023-07-17 DOI: 10.1016/j.jelechem.2023.117666

Wenhao Yu, Wenruo Li, Luzheng Zhao, Weiqiang Kong, Shaofeng Xu, Xu Han, Haoyuan Zhu, Shun Liu, Jiancong Guo, Zhongsheng Wen

{"title":"Regulating Cu-F bonding force with cobalt phthalocyanine to boost the reversibility of CuF2 for endurable lithium-ion storage within moderate voltage-cutoff window","authors":"Wenhao Yu, Wenruo Li, Luzheng Zhao, Weiqiang Kong, Shaofeng Xu, Xu Han, Haoyuan Zhu, Shun Liu, Jiancong Guo, Zhongsheng Wen","doi":"10.1016/j.jelechem.2023.117666","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117666","url":null,"abstract":"<div>CuF2 is a promising candidate of electrode materials for lithium-ion batteries due to its high specific capacity, high power density and environmental friendliness. However, the irreversible phase conversion and sluggish kinetics caused by serious copper dissolution and low conductivity make CuF2 difficult to achieve long cycling life. A facile strategy to incorporate CoPPc into CuF2 was proposed firstly to regulate the Cu-F bonding force to realize the high reversibility of CuF2 for lithium-ion storage. The results of DFT calculation, differential charge density simulation, work function calculation and COHP bond level calculation show that the existence of CoPPc can improve the surface charge distribution of CuF2 and thus improve the reversibility for durable lithium-ion storage. The cycle life performance of the CuF2@CoPPc composite electrode obtained by this method reached staggering 500 cycles and the capacity remained at 594.8 mAh/g.</div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"944 ","pages":"Article 117666"},"PeriodicalIF":4.5,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1764446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spatial Confinement-Enhanced electrochemiluminescence of Gold nanoclusters in chitosan nanogels and its application for ultrasensitive detection of Aflatoxin B1 壳聚糖纳米凝胶中金纳米团簇的空间约束增强电化学发光及其在黄曲霉毒素B1超灵敏检测中的应用

IF 4.5 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2023-08-15 Epub Date: 2023-06-03 DOI: 10.1016/j.jelechem.2023.117595

Mengyuan Wang , Huixiao Li , Yadi Wang , Xiaodie Hu , Shujun Fang , Huili Ma , Wei Li , Dianlei Wang , Zhili Han

{"title":"Spatial Confinement-Enhanced electrochemiluminescence of Gold nanoclusters in chitosan nanogels and its application for ultrasensitive detection of Aflatoxin B1","authors":"Mengyuan Wang , Huixiao Li , Yadi Wang , Xiaodie Hu , Shujun Fang , Huili Ma , Wei Li , Dianlei Wang , Zhili Han","doi":"10.1016/j.jelechem.2023.117595","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117595","url":null,"abstract":"<div>Gold nanoclusters (AuNCs), as a category of promising electrochemiluminescence (ECL) emitter, hold great potential for sensing applications. However, its application is still restricted by the relatively low ECL quantum yield and difficult to purification. In this work, AuNCs were confined in a soft chitosan (CS) nanogel matrix (AuNCs@CS) with good biocompatibility via a facile one-pot approach. The as-fabricated AuNCs@CS nanogels showed 2.4-fold ECL intensity relative to that of bare AuNCs without chitosan. The ECL enhancement was attributed to the increased percentage of Au(0) in AuNCs@CS nanogels, the confinement effect of chitosan nanogels, as well as chitosan as a polymer could reduce the diffusion of the radicals and prolong the excited state lifetime of AuNCs in ECL reaction. Moreover, the obtained AuNCs@CS nanogels are stable and easy to be purified by centrifugation. On this basis, a label-free ECL immunosensor for ultrasensitive detection of aflatoxin B1 (AFB1) was developed by using AuNCs@CS nanogels modified fluorine doped tin oxide (FTO) electrode as a sensing interface. The linear range of the proposed immunosensor for AFB1 detection was 3.16 × 10-14 to 3.16 × 10-12 g/mL with a detection limit of 9.3 × 10-15 g/mL, which was at least one order of magnitude lower than the reported ECL biosensor of AFB1. The proposed strategy may be used for the determination of other toxins in the Aflatoxin family if corresponding antibodies are available, which is of great significance for the quality control of Chinese herbal medicine and food safety.</div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"943 ","pages":"Article 117595"},"PeriodicalIF":4.5,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1760679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Enhanced Na-ion storage via creating smooth ions transportation pathways in a modified heterostructure 通过在修饰的异质结构中创建平滑的离子传输途径来增强na离子的存储

IF 4.5 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2023-08-15 Epub Date: 2023-06-15 DOI: 10.1016/j.jelechem.2023.117616

Guizhi Wang, Yongxiang Su, Qilong Dai, Tianren Zhang, Xusheng Xie, Fajun Li, Keying Zhang

{"title":"Enhanced Na-ion storage via creating smooth ions transportation pathways in a modified heterostructure","authors":"Guizhi Wang, Yongxiang Su, Qilong Dai, Tianren Zhang, Xusheng Xie, Fajun Li, Keying Zhang","doi":"10.1016/j.jelechem.2023.117616","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117616","url":null,"abstract":"<div>Sodium-ion batteries (SIBs) have drawn evolutionary attention due to the urgent requirements for renewable energy storage. Unfortunately, the cycle stability and rate capability of promising SnO2 materials are far from satisfactory. Herein, enhanced Na-ion storage via creating smooth ion transportation pathways in a modified heterostructure has been originally demonstrated. The tuned composite of uniformly dispersed SnO2 particles anchored on the surface of graphene nanosheets was prepared via a facile hydrothermal treatment with the help of iodine. Inspiringly, an anticipated Na-ion storage can be successfully achieved, with reversible Na-ion storage of 486.1 mA h g−1 at 50 mA g−1 and rate capability of 343.8 mA h g−1 even at 800 mA g−1. The exceptional electrochemical property profited from the synergistic effect of the heterostructure with plentiful ion transportation pathways for fast Na-ion diffusion. This work opens a practical opportunity for the design of next-generation rechargeable batteries in energy storage.</div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"943 ","pages":"Article 117616"},"PeriodicalIF":4.5,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1806864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

FeMoO4/N-doped porous carbon composites as anode material for high-performance lithium-ion batteries FeMoO4/ n掺杂多孔碳复合材料作为高性能锂离子电池负极材料

IF 4.5 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2023-08-15 Epub Date: 2023-06-21 DOI: 10.1016/j.jelechem.2023.117623

Jingjing Xie , Fei Tang , Haifeng Li, Wei Jiang, Zhenglong Yang, Deyang Zhao, Yanbin Xu, Yanfeng Meng, Wenjuan Sun, Ziqiao Jiang

引用次数: 1

Dendritic Fe2O3 single crystal for high performance lithium-ion batteries by turning the concentration of the iron source 枝状Fe2O3单晶为高性能锂离子电池通过转铁浓度的来源

IF 4.5 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2023-08-15 Epub Date: 2023-06-22 DOI: 10.1016/j.jelechem.2023.117624

Shijin Yu , Xuannan He , Zhiwen Zhu , Tianrui Chen , Liping Xiao , Huiqiang Sui , Keyan Hu , Ying Wei , Cuiyun Li , Hua Zhu , Zhuohao Xiao

{"title":"Dendritic Fe2O3 single crystal for high performance lithium-ion batteries by turning the concentration of the iron source","authors":"Shijin Yu , Xuannan He , Zhiwen Zhu , Tianrui Chen , Liping Xiao , Huiqiang Sui , Keyan Hu , Ying Wei , Cuiyun Li , Hua Zhu , Zhuohao Xiao","doi":"10.1016/j.jelechem.2023.117624","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117624","url":null,"abstract":"<div>Lithium-ion batteries (LIBs) are widely used due to their high capacity, high safety, and low cost. The anode material exhibits significant volume changes and subsequent reversible capacity decay during the lithiation/delithiation process, therefore, the performance of lithium-ion batteries is determined by the anode material. In this work, dendritic Fe2O3 single crystal with different precursor concentrations was prepared by hydrothermal method. The composition and microstructure of the samples were analyzed and tested using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy techniques. The electrochemical performance was tested using cyclic voltage measurement and electrical impedance spectroscopy. The leaves of dendritic Fe2O3 were too small when the iron source concentration was too low to provide enough Fe3+, and excessive Fe3+ led to the leaves of dendritic Fe2O3 being too thick. The most suitable branch size and thickness of dendritic Fe2O3 single crystals were grown for 0.007 mol/l Fe3+ concentration (sample L4), and its electrode showed the best electrochemical performance. The sample L4 has a capacity of up to 734 mAh∙g−1 for 200 cycles at 100 mA∙g−1, and has a specific capacity retention rate of 95.4% after high current 3000 mA∙g−1. This work is believed to facilitate understanding single crystal growth mechanisms and promote the development of high-performance lithium-ion batteries.</div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"943 ","pages":"Article 117624"},"PeriodicalIF":4.5,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1559751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Electrochemical evaluation of Trasar trac 102 as a corrosion inhibitor on API 5L X65 steel and theoretical study Trasar trac 102作为API 5L X65钢缓蚀剂的电化学评价及理论研究

IF 4.5 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2023-08-15 Epub Date: 2023-06-08 DOI: 10.1016/j.jelechem.2023.117599

A. Espinoza-Vázquez , L.J. Santiago Cárdenas , R. Galván-Martínez , A. Miralrio , M. Castro , A. Carmona Hernández , R. Orozco-Cruz

{"title":"Electrochemical evaluation of Trasar trac 102 as a corrosion inhibitor on API 5L X65 steel and theoretical study","authors":"A. Espinoza-Vázquez , L.J. Santiago Cárdenas , R. Galván-Martínez , A. Miralrio , M. Castro , A. Carmona Hernández , R. Orozco-Cruz","doi":"10.1016/j.jelechem.2023.117599","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117599","url":null,"abstract":"<div>Electrochemical evaluations of the commercially available inhibitor Trasar Trac102 were carried out under static and hydrodynamic conditions on API 5L X65 steel immersed in NaCl 3% wt. By Electrochemical Impedance Spectroscopy (EIS) techniques, obtaining the best efficiency of 95.4% under static conditions at 20 ppm. It was detected by rotating cylinder electrode that as the revolutions per minute of 100, 500 and 1000 rpm were increased, the inhibition efficiency tended to decrease as a result of the adsorption–desorption process of the organic molecules by the rotation rate. The results showed that the adsorption type of Trasar Trac102 on API 5L X65 steel in NaCl 3% wt was to form a monolayer on the metal surface according to the model fit with Langmuir isotherm. Scanning Electron Microscopy (SEM) was used for surface characterization, which shows a great difference in the target systems with corrosion products as a result of the deterioration caused by the corrosive medium and in the presence of the inhibitor. The results of the chemical analysis (EDX) show a significant decrease of oxygen in the presence of the inhibitor, suggesting that Trasar Trac102 is adsorbed directly on the steel. Dispersion-Corrected Density Functional Theory (DFT) calculations were used to characterize the interactions between the inhibitor components and the steel surface by a cluster approach. Mostly, chemisorption was explained by bonds established between oxygen atoms of inhibitor components and iron ones of the steel surface. Due to their free binding energies computed, metasilicate and mercaptobenzothiazol are expected to interact strongly and to adsorb spontaneously on the steel surface. Also, metasilicate is the component that obtained the largest charge transference to iron cluster.</div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"943 ","pages":"Article 117599"},"PeriodicalIF":4.5,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2620201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Properties of hollow yolk-shell NiS2/FeS2@NC@NiFe LDH/FeO(OH) nanoflower microspheres as anode materials for lithium-ion batteries 中空蛋黄壳NiS2/FeS2@NC@NiFe LDH/FeO(OH)纳米花微球作为锂离子电池负极材料的性能

IF 4.5 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2023-08-15 Epub Date: 2023-06-15 DOI: 10.1016/j.jelechem.2023.117606

Ying Liu, Xue Zhou, Ping Chen, Xinrong Cao, Dongxuan Liu, Ruiqi Wang

{"title":"Properties of hollow yolk-shell NiS2/FeS2@NC@NiFe LDH/FeO(OH) nanoflower microspheres as anode materials for lithium-ion batteries","authors":"Ying Liu, Xue Zhou, Ping Chen, Xinrong Cao, Dongxuan Liu, Ruiqi Wang","doi":"10.1016/j.jelechem.2023.117606","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117606","url":null,"abstract":"<div>As an anode material of lithium-ion batteries, transition metal sulfides have high theoretical capacity, and the structure design is an effective strategy to gain better electrochemical performance. Layered double hydroxides (LDHs) have significant preponderances in the field of energy storage on account of their exchangeable anions and biggish specific surface area. Nevertheless, its defects such as poor conductivity, easy agglomeration of nanosheets and biggish volume change during the cycle result in poor cycling durability and rate performance, which gravely constrain its further application. In this study, hollow yolk-shell NiS2/FeS2@NC@NiFe LDH/FeO(OH) nanoflower microspheres are prepared successfully by solvothermal and hydrothermal methods. Firstly, introducing N-doped carbon layer can availably heighten the electro-conductivity of the materials and stop the metallic particles from falling off to boost the structural stability. The design of hollow yolk-shell and nanoflower structure can effectively inhibit cubical expansion. In addition, the unique layered structure of the nanosheets can provide more active sites, shorten the ion transport path, and enhance the lithium storage performance. As a result, the NiS2/FeS2@NC@NiFe LDH/FeO(OH) electrode has splendid cycling performance (709.9 mAh g−1 at 0.2 A g−1 after 200 cycles). These prominent electrochemical properties demonstrate convincingly that the NiS2/FeS2@NC@NiFe LDH/FeO(OH) is a viable anode material.</div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"943 ","pages":"Article 117606"},"PeriodicalIF":4.5,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3399953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrochemical degradation of the antibiotic ceftazidime by La doped modified PbO2 electrode: Catalytic conditions and degradation pathway La掺杂修饰PbO2电极电化学降解抗生素头孢他啶:催化条件和降解途径

IF 4.5 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2023-08-15 Epub Date: 2023-06-20 DOI: 10.1016/j.jelechem.2023.117620

Ziming Chen , Yafei Du , Guangming Yang , Jian Wang , Yulong Ma , Yonggang Sun , Yongsheng Ren , Xiaoxiao Duan

{"title":"Electrochemical degradation of the antibiotic ceftazidime by La doped modified PbO2 electrode: Catalytic conditions and degradation pathway","authors":"Ziming Chen , Yafei Du , Guangming Yang , Jian Wang , Yulong Ma , Yonggang Sun , Yongsheng Ren , Xiaoxiao Duan","doi":"10.1016/j.jelechem.2023.117620","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117620","url":null,"abstract":"<div>The use of antibiotics continues to increase, and its unreasonable use and discharge have caused great harm. Electrochemical oxidation is an effective method to solve this problem. In this work, which was prepared by electrodeposition of Ti/PbO2 and Ti/PbO2-La electrodes, using the above electrode explores the ceftazidime electrochemical degradation. The results indicated that the electrode doped with La had more active sites and better electrochemical performance. Through 2 h of degradation, the removal rate of ceftazidime attained 96.12 %. Meanwhile, the influence of current density, electrode spacing, electrolyte concentration, and initial concentration of ceftazidime on the degradation efficiency were systematically evaluated. Based on the identification of intermediate products, the degradation pathway was proposed, and ceftazidime was finally degraded to some small molecules. A new method was developed to remove the ceftazidime.</div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"943 ","pages":"Article 117620"},"PeriodicalIF":4.5,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2560423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simultaneous electrochemical detection of Cd (II) and Pb (II) based on L-cysteine functionalized gold nanoparticles/metal-organic frameworks-graphene oxide nanocomposites 基于l-半胱氨酸功能化金纳米粒子/金属-有机骨架-氧化石墨烯纳米复合材料的Cd (II)和Pb (II)的同步电化学检测

IF 4.5 3区化学

Journal of Electroanalytical Chemistry Pub Date : 2023-08-15 Epub Date: 2023-05-29 DOI: 10.1016/j.jelechem.2023.117573

Birui Wang , Jin Chen , Huapei Tong , Yumeng Huang , Bo Liu , Xiaolan Yang , Zhaohong Su , Xinman Tu , Xiaoli Qin

{"title":"Simultaneous electrochemical detection of Cd (II) and Pb (II) based on L-cysteine functionalized gold nanoparticles/metal-organic frameworks-graphene oxide nanocomposites","authors":"Birui Wang , Jin Chen , Huapei Tong , Yumeng Huang , Bo Liu , Xiaolan Yang , Zhaohong Su , Xinman Tu , Xiaoli Qin","doi":"10.1016/j.jelechem.2023.117573","DOIUrl":"https://doi.org/10.1016/j.jelechem.2023.117573","url":null,"abstract":"<div>In this paper, a facile electrochemical sensor for simultaneous detection of Cd2+ and Pb2+ was fabricated, on the base of in situ growing gold nanoparticles (AuNPs) on L-cysteine functionalized metal-organic frameworks (L-MOFs) and graphene oxide (GO) nanocomposites (L-Au-MOFs-GO). First, L-MOFs were in-situ synthesized on the GO nanosheets by a one-step hydrothermal method. Then, the L-cysteine in L-MOFs-GO nanocomposite was used as a reductant to react with HAuCl4 and in-situ obtain AuNPs, finally forming the L-Au-MOFs-GO composite. This L-Au-MOFs-GO composite not only can enhance the conductivity of the composite by accelerating the electron transfer, but also can act as an enrichment medium phase of heavy metal ions because of the interaction between metal cations and hydrophilic groups of L-MOFs or GO. The morphology of L-Au-MOFs-GO composites were characterized by transmission electron microscope (TEM), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectrometer (FT-IR), and X-ray diffraction (XRD). The results showed that the electrochemical performance of L-Au-MOFs-GO composite was better than GO material or MOFs-GO composite. Under the optimal conditions, the L-Au-MOFs-GO modified electrode was successfully applied to individually and simultaneously detect the Cd2+ and Pb2+ in an acetic acid buffer solution with good selectivity and high sensitivity. This method was utilized for simultaneous detection of Cd2+ and Pb2+ in river water and the leaching solution of watermelon with great reliability and accuracy. This new nanomaterial for simultaneous detection of Cd2+ and Pb2+ has the potential application in complicated samples.</div>","PeriodicalId":50545,"journal":{"name":"Journal of Electroanalytical Chemistry","volume":"943 ","pages":"Article 117573"},"PeriodicalIF":4.5,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"1559867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2