Electrochemical Characterization and Application of Carbon Nanotubes and Metal Oxide Nanoparticle Modified Electrodes PDF Download
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Author: Mohammed Zidan
Publisher:
ISBN:
Category : Electrochemical analysis
Languages : en
Pages : 260
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Book Description
Author: Mohammed Zidan
Publisher:
ISBN:
Category : Electrochemical analysis
Languages : en
Pages : 260
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Book Description
Author: Samira Bagheri
Publisher: CRC Press
ISBN: 1351818333
Category : Science
Languages : en
Pages : 269
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Book Description
Nanotechnology has become one of the most important fields in science. Nanoparticles exhibit unique chemical, physical and electronic properties that are different from those of bulk materials, due to their small size and better architecture. Nanoparticles can be used to construct novel sensing devices; in particular electrochemical sensors. Electrochemical detection is highly attractive for the monitoring of glucose, cancer cells, cholesterol and infectious diseases. Unique nanocomposite-based films proposed in this book open new doors to the design and fabrication of high-performance electrochemical sensors.
Author: Abolanle Saheed Adekunle
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
This work describes metal (M) and metal oxides (MO) films (where M = Ni, Co and Fe) obtained by electrosynthesis and chemical synthesis, and modified with carbon nanotubes (CNTs) on edged plane pyrolytic graphite electrode (EPPGE). The MO nanoparticles investigated are nickel oxide (NiO), cobalt oxide Co3O4) and iron oxide (Fe2O3). Successful modification of the electrodes with the M or MO/CNT nanocomposite was confirmed by field emission scanning electron microscopy (FESEM), high resolution scanning electron microscopy (HRSEM), high resolution transmission electron microscopy (HRTEM), atomic force microscopy (AFM), x-ray diffraction spectroscopy (XRD), x-ray photoelectron spectroscopy (XPS), electron dispersive x-ray spectroscopy (EDX), fourier transformed infra-red spectroscopy (FTIR) and ultraviolet-visible (UV-vis) spectroscopy. Electron transport (ET) properties of the modified electrodes was explored using cyclic voltammetry (CV) and electrochemical impedance spectroscopic techniques (EIS) with ferricyanide/ferrocyanide ([Fe(CN) 6]3-/4- ) as the redox probe. The electron transfer constant (k0) differs in terms of materials, method of synthesis and electrical equivalent circuits used in the fitting or modelling process. Generally, the k0 values are in the 10-3 10-2 cms-1 with Ni nanoparticles having the highest k0 or fastest electron transport. The presence of CNTs also enhances the ET compared with electrodes without CNTs. The electrocatalytic properties of the modified electrodes were explored using the following analytical probes: diethylaminoethanethiol (DEAET), hydrazine, nitrite and dopamine. The study showed that the electrocatalytic oxidation of DEAET and hydrazine was favoured on electrode modified with Ni nanoparticles: nitrite and dopamine were best catalysed by the Co and Fe2O3 nanoparticles, respectively. Electroanalysis results (using chronoamperometry, square wave voltammetry and linear sweep voltammetry) indicated some level of adsorption of DEAET, hydrazine and nitrite on the modified electrode, while dopamine electrocatalytic oxidation and detection followed a simple diffusion controlled process. The adsorption process was found to be physically induced and could be eliminated by repetitive cycling of the electrode in the aqueous electrolyte solution. Electrodes modified with chemically-synthesised material (particularly nickel) were less adsorptive towards DEAET and hydrazine detection, and gave sensitivity and limit of detection values that compared with data obtained using electrochemical deposition / synthesis. The chemical stability and reproducibility of the modified electrodes were determined and discussed. Finally, electrochemical properties were studied to help screen these electrode materials in supercapacitors. CNT-NiO nanocomposites exhibit remarkable super capacitive behaviour in neutral and acidic media compared to the other CNT-MO nanocomposites investigated. Interestingly, the capacitive behaviour of the CNT-NiO was more enhanced in H2SO4 solution than in Na2SO4, possibly due to the high conductivity of the former. The CNT-NiO electrode maintained good stability with only about 5% loss of its specific capacitance after 1000 cycle life.
Author: Martin Pumera
Publisher: CRC Press
ISBN: 9814364916
Category : Medical
Languages : en
Pages : 288
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Book Description
Nanotechnology brings new possibilities for the development of sensors, biosensors, and novel electrochemical bioassays. Nanoscale materials have been extensively used in a wide variety of configurations- as electrode surfaces to promote electrochemical reaction, as "wires" to enzymes connecting their redox centers to electrode surface, as nanobarc
Author: Richard C. Alkire
Publisher: John Wiley & Sons
ISBN: 3527340947
Category : Science
Languages : en
Pages : 548
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Book Description
Volume XVII in the "Advances in Electrochemical Science and Engineering" series, this monograph covers progress in this rapidly developing field with a particular emphasis on important applications, including spectroscopy, medicinal chemistry and analytical chemistry. As such it covers nanopatterned and nanoparticle-modified electrodes for analytical detection, surface spectroscopy, electrocatalysis and a fundamental understanding of the relation between the electrode structure and its function. Written by a group of international experts, this is a valuable resource for researchers working in such fields as electrochemistry, materials science, spectroscopy, analytical and medicinal chemistry.
Author: Mohammad Naraghi
Publisher: IntechOpen
ISBN: 9789533075662
Category : Science
Languages : en
Pages : 618
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Book Description
Carbon Nanotubes are among the strongest, toughest, and most stiff materials found on earth. Moreover, they have remarkable electrical and thermal properties, which make them suitable for many applications including nanocomposites, electronics, and chemical detection devices. This book is the effort of many scientists and researchers all over the world to bring an anthology of recent developments in the field of nanotechnology and more specifically CNTs. In this book you will find: - Recent developments in the growth of CNTs- Methods to modify the surfaces of CNTs and decorate their surfaces for specific applications- Applications of CNTs in biocomposites such as in orthopedic bone cement- Application of CNTs as chemical sensors- CNTs for fuelcells- Health related issues when using CNTs
Author: Christopher Brett
Publisher: Oxford University Press
ISBN:
Category : Medical
Languages : en
Pages : 104
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Book Description
This is an introduction to the areas of application of electroanalysis, which has an important role with current environmental concerns, both in the laboratory and in the field.
Author: Sabine Szunerits
Publisher: John Wiley & Sons
ISBN: 1119243955
Category : Technology & Engineering
Languages : en
Pages : 319
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Book Description
A comprehensive look at the most widely employed carbon-based electrode materials and the numerous electroanalytical applications associated with them. A valuable reference for the emerging age of carbon-based electronics and electrochemistry, this book discusses diverse applications for nanocarbon materials in electrochemical sensing. It highlights the advantages and disadvantages of the different nanocarbon materials currently used for electroanalysis, covering the electrochemical sensing of small-sized molecules, such as metal ions and endocrine disrupting chemicals (EDCs), as well as large biomolecules such as DNA, RNA, enzymes and proteins. A comprehensive look at state-of-the-art applications for nanocarbon materials in electrochemical sensors Emphasizes the relationship between the carbon structures and surface chemistry, and electrochemical performance Covers a wide array of carbon nanomaterials, including nanocarbon films, carbon nanofibers, graphene, diamond nanostructures, and carbon-dots Edited by internationally renowned experts in the field with contributions from researchers at the cutting edge of nanocarbon electroanalysis Nanocarbons for Electroanalysis is a valuable working resource for all chemists and materials scientists working on carbon based-nanomaterials and electrochemical sensors. It also belongs on the reference shelves of academic researchers and industrial scientists in the fields of nanochemistry and nanomaterials, materials chemistry, material science, electrochemistry, analytical chemistry, physical chemistry, and biochemistry.
Author: Richard C. Alkire
Publisher: John Wiley & Sons
ISBN: 3527697519
Category : Science
Languages : en
Pages : 472
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Book Description
The book sets the standard on carbon materials for electrode design. For the first time, the leading experts in this field summarize the preparation techniques and specific characteristics together with established and potential applications of the different types of carbon-based electrodes. An introductory chapter on the properties of carbon together with chapters on the electrochemical characteristics and properties of the different modifications of carbon such as carbon nanotubes, graphene, carbon fiber, diamond or highly ordered pyrolytic graphite provide the reader with the basics on this fascinating and ubiquitous electrode material. Cutting-edge technologies such as carbon electrodes in efficient supercapacitors, Li-ion batteries and fuel cells, or electrodes prepared by screen-printing are discussed, giving a complete but concise overview about the topic. The clearly structured book helps newcomers to grasp easily the principles of carbon-based electrodes, while researchers in fundamental and applied electrochemistry will find new ideas for further research on related key technologies.
Author: Sami Elhag
Publisher: Linköping University Electronic Press
ISBN: 9176855902
Category :
Languages : en
Pages : 89
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Book Description
The goal of this thesis is the development of scalable, low cost synthesis of metal oxide nanostructures based electrodes and to correlate the chemical modifications with their energy conversion performance. Methods in energy conversion in this thesis have focused on two aspects; a potentiometric chemical sensor was used to determine the analytical concentration of some components of the analyte solution such as dopamine, glucose and glutamate molecules. The second aspect is to fabricate a photo-electrochemical (PEC) cell. The biocompatibility, excellent electro-catalytic activities and fast electron transfer kinetics accompanied with a high surface area to volume ratio; are properties of some metal oxide nanostructures that of a potential for their use in energy conversion. Furthermore, metal oxide nanostructures based electrode can effectively be improved by the physical or a chemical modification of electrode surface. Among these metal oxide nanostructures are cobalt oxide (Co3O4), zinc oxide (ZnO), and bismuth-zincvanadate (BiZn2VO6) have all been studied in this thesis. Metal oxide nanostructures based electrodes are fabricated on gold-coated glass substrate by low temperature (< 100 0C) wet chemicalapproach. X-ray diffraction, x-ray photoelectron spectroscopy and scanning electron microscopy were used to characterize the electrodes while ultraviolet-visible absorption and photoluminescence were used to investigate the optical properties of the nanostructures. The resultant modified electrodes were tested for their performance as chemical sensors and for their efficiency in PEC activities. Efficient chemically modified electrodes were demonstrated through doping with organic additives like anionic, nonionic or cationic surfactants. The organic additives are showing a crucial role in the growth process of metal oxide nanocrystals and hence can beused to control the morphology. These organic additives act also as impurities that would significantly change the conductivity of the electrodes. However, no organic compounds dependence was observed to modify the crystallographic structure. The findings in this thesis indicate the importance of the use of controlled nanostructures morphology for developing efficient functional materials.
