Exploring Transition Metal Chalcogenides for Bio Sensing and Environmental Remediation

Exploring Transition Metal Chalcogenides for Bio Sensing and Environmental Remediation
Author: Bahareh Golrokh Amin
Publisher:
Total Pages: 187
Release: 2019
Genre:
ISBN:
GET BOOK

Download Exploring Transition Metal Chalcogenides for Bio Sensing and Environmental Remediation Book in PDF, Epub and Kindle

"Electrocatalysts play an inevitable role in many applications including energy storage, energy conversion, and biosensing. The state-of-the-art noble metal-based electrocatalysts have long been used in full water splitting, non-enzymatic glucose sensing, and supercapacitors. However, scarcity and high cost of noble metals restrict utilization of such electrocatalysts in large-scale implementations. Transition metal-based electrodes have been considered as a potential solution to address these drawbacks as well as to enhance the electrocatalytic performance. In this work, applicability of non-oxidic transition metal based electrocatalysts is evaluated. Transition metal chalcogenides are expected to have high catalytic performance owing to their facilitated electron cloud delocalization on the transition metal site as well as enhanced covalency in the lattice due to the low anion electronegativity. To examine this theory, CoNi2Se4 is studied for its application in full water splitting. This catalyst shows an excellent electrocatalytic activity with low overpotential of 160 mV @ 10 mA cm−2 for OER. CoNi2Se4-rGO on Ni foam has also been employed as an electrocatalyst for the direct oxidation of glucose. A high sensitivity of 18.89 mA mM−1 cm−2 at low applied potential of 0.35 V vs. Ag|AgCl is achieved. For the same application, we investigated Ni3Te2. With electrodeposition method, a high glucose detection sensitivity of 41.615 mA cm−2 mM−1 is reported. We also fabricated a hydrothermally synthesized Ni3Te2 with a sensitivity of 35.213 mA cm−2 mM−1. Finally, we examined NiCo2Se4/rGO for its application in supercapacitors and achieved a high specific capacitance of 2038.55 F g−1 with a high energy density and power density of 67.01 W h kg−1 and 903.61 W kg−1, respectively"--Abstract, page iv.

Transition Metal Chalcogenide Hybrid Systems as Catalysts for Energy Conversion and Biosensing

Transition Metal Chalcogenide Hybrid Systems as Catalysts for Energy Conversion and Biosensing
Author: Siddesh Umapathi
Publisher:
Total Pages: 205
Release: 2020
Genre:
ISBN:
GET BOOK

Download Transition Metal Chalcogenide Hybrid Systems as Catalysts for Energy Conversion and Biosensing Book in PDF, Epub and Kindle

"Generation of hydrogen and oxygen through catalyst-aided water splitting which has immense applications in metal air batteries, PEM fuel cells and solar to fuel energy production, has been one of the critical topics in recent times. The state of art oxygen evolution reaction (OER), oxygen reduction reaction (ORR), hydrogen evolution reaction (HER) catalysts are mostly comprised of precious metals. The current challenge lies in replacing these precious metal-based catalysts with non-precious earth-abundant materials without compromising catalytic efficiency. This research explores mixed metal selenides containing Fe-Ni, Fe-Co and RhSe which were hydrothermally synthesized and/or electrodeposited and tested for OER and ORR catalytic activity in alkaline medium. This spinel class of compounds generically referred to as AB2Se4 where A and B are divalent and trivalent cations respectively. Interestingly, FeCo2Se4 and FeNi2Se4, both showed highly efficient catalytic activity with low overpotential. Increase in performance was observed when these two spinel compositions were mixed with conducting carbon matrix, which decreased the overpotential significantly and increased the stability. Finally, the metal selenides were also applied towards electrochemical bio sensing of dopamine and glucose. Electrodeposited and hydrothermally synthesized CuSe was studied towards detection of ultralow concentrations of dopamine in neutral phosphate buffer solution. The electrodeposited CuSe was also active towards detection of glucose in alkaline electrolyte. CuSe showed low detection limit, high sensitivity and selectivity towards these biomolecules"--Abstract, page v.

Chalcogenide-Based Nanomaterials as Photocatalysts

Chalcogenide-Based Nanomaterials as Photocatalysts
Author: Mohammad Mansoob Khan
Publisher: Elsevier
Total Pages: 378
Release: 2021-04-07
Genre: Technology & Engineering
ISBN: 0128209178
GET BOOK

Download Chalcogenide-Based Nanomaterials as Photocatalysts Book in PDF, Epub and Kindle

Chalcogenide-Based Nanomaterials as Photocatalysts deals with the different types of chalcogenide-based photocatalytic reactions, covering the fundamental concepts of photocatalytic reactions involving chalcogenides for a range of energy and environmental applications. Sections focus on nanostructure control, synthesis methods, activity enhancement strategies, environmental applications, and perspectives of chalcogenide-based nanomaterials. The book offers guidelines for designing new chalcogenide-based nanoscale photocatalysts at low cost and high efficiency for efficient utilization of solar energy in the areas of energy production and environment remediation. Provides information on the development of novel chalcogenide-based nanomaterials Outlines the fundamentals of chalcogenides-based photocatalysis Includes techniques for heterogeneous catalysis based on chalcogenide-based nanomaterials

Multifunctional Hybrid Nanomaterials for Sustainable Agri-food and Ecosystems

Multifunctional Hybrid Nanomaterials for Sustainable Agri-food and Ecosystems
Author: Kamel A. Abd-Elsalam
Publisher: Elsevier
Total Pages: 730
Release: 2020-04-14
Genre: Technology & Engineering
ISBN: 012821354X
GET BOOK

Download Multifunctional Hybrid Nanomaterials for Sustainable Agri-food and Ecosystems Book in PDF, Epub and Kindle

Multifunctional Hybrid Nanomaterials for Sustainable Agrifood and Ecosystems shows how hybrid nanomaterials (HNMs) are being used to enhance agriculture, food and environmental science. The book discusses the synthesis and characterization of HNMs before exploring agrifoods and environmental functions. It shows how novel HNMs are being used for the detection and separation of heavy metal ions, for destroying and sensing of insecticides, in managed release fertilizer and pesticide formulations, plant protection, plant promotions, purification, detection, and to control mycotoxins. Further, the book describes the use of silica-based total nanosystems, carbon nanotubes, nanocellulose-based, and polymer nanohybrids for agricultural and biological applications. This book is an important reference source for materials scientists, engineers and food scientists who want to gain a greater understanding on how multifunctional nanomaterials are being used for a range of agricultural and environmental applications. Outlines the major nanomaterial types that are being used in agriculture Explains why the properties of multifunctional nanomaterials are particularly efficient for use in agriculture Assesses the major challenges of using multifunctional nanomaterials on an industrial scale

Clay Materials for Environmental Remediation

Clay Materials for Environmental Remediation
Author: Suryadi Ismadji
Publisher: Springer
Total Pages: 131
Release: 2015-03-24
Genre: Science
ISBN: 331916712X
GET BOOK

Download Clay Materials for Environmental Remediation Book in PDF, Epub and Kindle

A comprehensive review of environmental remediation is presented with an emphasis on the role of clay minerals in water purification. In the first chapter, important aspects of environmental problems and possible solutions are discussed. In the second chapter, the application of natural clay minerals as environmental cleaning agents are explained. The discussion is focused on the role of different types of clay materials in hazardous substance removal from air, aqueous solutions, wastewater, aquaculture, ground water, etc. In the next chapter, the modification of clay materials is explored including the preparation of clay composite materials for environmental remediation. Various aspects of clay material modifications and the effects of clay surface chemistry on the removal of hazardous material is also discussed. Next, the equilibrium and kinetics of hazardous substance adsorption is presented. This chapter summarizes recent studies on the removal of hazardous substances from aqueous solutions and the environment using various types of clay minerals. The brief also includes various models used in adsorption studies and touches on the characterization of clay minerals.

Spintronic 2D Materials

Spintronic 2D Materials
Author: Wenqing Liu
Publisher: Elsevier
Total Pages: 320
Release: 2019-06-15
Genre: Technology & Engineering
ISBN: 0081021542
GET BOOK

Download Spintronic 2D Materials Book in PDF, Epub and Kindle

Spintronic 2D Materials: Fundamentals and Applications provides an overview of the fundamental theory of 2D electronic systems that includes a selection of the most intensively investigated 2D materials. The book tells the story of 2D spintronics in a systematic and comprehensive way, providing the growing community of spintronics researchers with a key reference. Part One addresses the fundamental theoretical aspects of 2D materials and spin transport, while Parts Two through Four explore 2D material systems, including graphene, topological insulators, and transition metal dichalcogenides. Each section discusses properties, key issues and recent developments. In addition, the material growth method (from lab to mass production), device fabrication and characterization techniques are included throughout the book. Discusses the fundamentals and applications of spintronics of 2D materials, such as graphene, topological insulators and transition metal dichalcogenides Includes an in-depth look at each materials system, from material growth, device fabrication and characterization techniques Presents the latest solutions on key challenges, such as the spin lifetime of 2D materials, spin-injection efficiency, the potential proximity effects, and much more

Nanostructures for Novel Therapy

Nanostructures for Novel Therapy
Author: Denisa Ficai
Publisher: Elsevier
Total Pages: 908
Release: 2017-02-25
Genre: Technology & Engineering
ISBN: 0323461484
GET BOOK

Download Nanostructures for Novel Therapy Book in PDF, Epub and Kindle

Nanostructures for Novel Therapy: Synthesis, Characterization and Applications focuses on the fabrication and characterization of therapeutic nanostructures, in particular, synthesis, design, and in vitro and in vivo therapeutic evaluation. The chapters provide a cogent overview of recent therapeutic applications of nanostructured materials that includes applications of nanostructured materials for wound healing in plastic surgery and stem cell therapy. The book explores the promise for more effective therapy through the use of nanostructured materials, while also assessing the challenges their use might pose from both an economic and medicinal point of view. This innovative look at how nanostructured materials are used in therapeutics will be of great benefit to researchers, providing a greater understanding of the different ways nanomaterials could improve medical treatment, along with a discussion of the obstacles that need to be overcome in order to guarantee widespread availability. Outlines how the characteristics of nanostructures made from different materials gives particular properties that can be successfully used in therapeutics Compares the properties of different nanostructures, allowing medicinal chemists and engineers to select which are most appropriate for their needs Highlights new uses of nanostructures within the therapeutic field, enabling the discovery of new, more effective drugs

Fundamentals and Sensing Applications of 2D Materials

Fundamentals and Sensing Applications of 2D Materials
Author: Chandra Sekhar Rout
Publisher: Woodhead Publishing
Total Pages: 512
Release: 2019-06-15
Genre: Science
ISBN: 0081025785
GET BOOK

Download Fundamentals and Sensing Applications of 2D Materials Book in PDF, Epub and Kindle

Fundamentals and Sensing Applications of 2D Materials provides a comprehensive understanding of a wide range of 2D materials. Examples of fundamental topics include: defect and vacancy engineering, doping and advantages of 2D materials for sensing, 2D materials and composites for sensing, and 2D materials in biosystems. A wide range of applications are addressed, such as gas sensors based on 2D materials, electrochemical glucose sensors, biosensors (enzymatic and non-enzymatic), and printed, stretchable, wearable and flexible biosensors. Due to their sub-nanometer thickness, 2D materials have a high packing density, thus making them suitable for the fabrication of thin film based sensor devices. Benefiting from their unique physical and chemical properties (e.g. strong mechanical strength, high surface area, unparalleled thermal conductivity, remarkable biocompatibility and ease of functionalization), 2D layered nanomaterials have shown great potential in designing high performance sensor devices. Provides a comprehensive overview of 2D materials systems that are relevant to sensing, including transition metal dichalcogenides, metal oxides, graphene and other 2D materials system Includes information on potential applications, such as flexible sensors, biosensors, optical sensors, electrochemical sensors, and more Discusses graphene in terms of the lessons learned from this material for sensing applications and how these lessons can be applied to other 2D materials

Carbon Nanomaterial-Based Adsorbents for Water Purification

Carbon Nanomaterial-Based Adsorbents for Water Purification
Author: Suprakas Sinha Ray
Publisher: Elsevier
Total Pages: 422
Release: 2020-06-27
Genre: Technology & Engineering
ISBN: 0128219602
GET BOOK

Download Carbon Nanomaterial-Based Adsorbents for Water Purification Book in PDF, Epub and Kindle

The deterioration of water quality and unavailability of drinkable water are pressing challenges worldwide. The removal of toxic organic and inorganic pollutants from water is vital for a clean environment, as a response to water scarcity. Adsorption-based water technologies are among the most widely used because of their high efficiency and low cost, without relying on a complex infrastructure. In recent years, carbon nanomaterials (CNMs), such as graphene and derivatives, carbon nanotubes, carbon nanofibers, nanoporous carbon, fullerenes, graphitic carbon nitride, and nanodiamonds have been extensively exploited as adsorbents due to their extraordinary surface properties, ease of modification, large surface area, controlled structural varieties, high chemical stability, porosity, low density, ease of regeneration, and reusability. This book provides a thorough overview of the state of the art in carbon nanomaterials as they are used for adsorption applications in water purifications, as well as addressing their toxicological challenges. This volume primarily explores the fundamentals of adsorption, its mechanical aspects, synthesis and properties of CNMs, and adsorption performances of CNMs and their nanocomposites with organic and inorganic materials. Structural engineering and activation processes produce materials with enhanced adsorptive properties and separation efficiencies. Furthermore, the formation of CNMs with 2D and 3D macro-and microstructures and high porosities is a potential approach to improve adsorption performances and extend CNM use at the industrial level. The book also addresses important issues regarding these adsorbents that potentially affect future research and industrial applications of carbon-based nanoadsorbents in water security. Presents advances in multifunctional 3D superstructures of carbon nanomaterials and their composites for adsorption applications Outlines the fundamentals on synthesis and characterization techniques of carbon-based nanostructures and their composites Assesses the major toxicological challenges in using nanostructured materials as adsorbents for water purification

Bio-Nanoparticles

Bio-Nanoparticles
Author: Om V. Singh
Publisher: John Wiley & Sons
Total Pages: 395
Release: 2015-06-22
Genre: Science
ISBN: 1118677684
GET BOOK

Download Bio-Nanoparticles Book in PDF, Epub and Kindle

Nanoparticles are the building blocks for nanotechnology; they are better built, long lasting, cleaner, safer, and smarter products for use across industries, including communications, medicine, transportation, agriculture and other industries. Controlled size, shape, composition, crystallinity, and structure-dependent properties govern the unique properties of nanotechnology. Bio-Nanoparticles: Biosynthesis and Sustainable Biotechnological Implications explores both the basics of and advancements in nanoparticle biosynthesis. The text introduces the reader to a variety of microorganisms able to synthesize nanoparticles, provides an overview of the methodologies applied to biosynthesize nanoparticles for medical and commercial use, and gives an overview of regulations governing their use. Authored by leaders in the field, Bio-Nanoparticles: Biosynthesis and Sustainable Biotechnological Implications bridges the gap between biology and technology, and is an invaluable resource for students and researchers alike.