Download or read book Graphene based nanocomposites for electronics and photocatalysis written by Ebrahim Chalangar and published by Linköping University Electronic Press. This book was released on 2019-05-28 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of future electronics depends on the availability of suitable functional materials. Printed electronics, for example, relies on access to highly conductive, inexpensive and printable materials, while strong light absorption and low carrier recombination rates are demanded in photocatalysis industry. Despite all efforts to develop new materials, it still remains a challenge to have all the desirable aspects in a single material. One possible route towards novel functional materials, with improved and unprecedented physical properties, is to form composites of different selected materials. In this work, we report on hydrothermal growth and characterization of graphene/zinc oxide (GR/ZnO) nanocomposites, suited for electronics and photocatalysis application. For conductive purposes, highly Al-doped ZnO nanorods grown on graphene nanoplates (GNPs) prevent the GNPs from agglomerating and promote conductive paths between the GNPs. The effect of the ZnO nanorod morphology and GR dispersity on the nanocomposite conductivity and GR/ZnO nanorod bonding strength were investigated by conductivity measurements and optical spectroscopy. The inspected samples show that growth in high pH solutions promotes a better graphene dispersity, higher doping and enhanced bonding between the GNPs and the ZnO nanorods. Growth in low pH solutions yield samples characterized by a higher conductivity and a reduced number of surface defects. In addition, different GR/ZnO nanocomposites, decorated with plasmonic silver iodide (AgI) nanoparticles, were synthesized and analyzed for solar-driven photocatalysis. The addition of Ag/AgI generates a strong surface plasmon resonance effect involving metallic Ag0, which redshifts the optical absorption maximum into the visible light region enhancing the photocatalytic performance under solar irradiation. A wide range of characterization techniques including, electron microscopy, photoelectron spectroscopy and x-ray diffraction confirm a successful formation of photocatalysts. Our findings show that the novel proposed GR-based nanocomposites can lead to further development of efficient photocatalyst materials with applications in removal of organic pollutants, or for fabrication of large volumes of inexpensive porous conjugated GR-semiconductor composites.

Download or read book Handbook of Nanomaterials for Wastewater Treatment written by Bharat A. Bhanvase and published by Elsevier. This book was released on 2021-05-05 with total page 1218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Nanomaterials for Wastewater Treatment: Fundamentals and Scale up Issues provides coverage of the nanomaterials used for wastewater treatment, covering photocatalytic nanocomposite materials, nanomaterials used as adsorbents, water remediation processes, and their current status and challenges. The book explores the major applications of nanomaterials for effective catalysis and adsorption, also providing in-depth information on the properties and application of new advanced nanomaterials for wastewater treatment processes. This is an important reference source for researchers who need to solve basic and advanced problems relating to the use of nanomaterials for the development of wastewater treatment processes and technologies. As nanotechnology has the potential to substantially improve current water and wastewater treatment processes, the synthesis methods and physiochemical properties of nanomaterials and noble metal nanoparticles make their performance and mechanisms efficient for the treatment of various pollutants. Explains the properties of the most commonly used nanomaterials used for wastewater treatment Describes the major nanoscale synthesis and processing techniques for wastewater treatment Assesses the major challenges for using nanomaterials on a mass scale for wastewater treatment

Download or read book Graphene Based Polymer Nanocomposites in Electronics written by Kishor Kumar Sadasivuni and published by Springer. This book was released on 2015-01-19 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers graphene reinforced polymers, which are useful in electronic applications, including electrically conductive thermoplastics composites, thermosets and elastomers. It systematically introduces the reader to fundamental aspects and leads over to actual applications, such as sensor fabrication, electromagnetic interference shielding, optoelectronics, superconductivity, or memory chips. The book also describes dielectric and thermal behaviour of graphene polymer composites - properties which are essential to consider for the fabrication and production of these new electronic materials. The contributions in this book critically discuss the actual questions in the development and applications of graphene polymer composites. It will thus appeal to chemists, physicists, materials scientists as well as nano technologists, who are interested in the properties of graphene polymer composites.

Download or read book Graphene based Nanotechnologies for Energy and Environmental Applications written by Mohammad Jawaid and published by Elsevier. This book was released on 2019-08-02 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: Graphene-Based Nanotechnologies for Energy and Environmental Applications explores how graphene-based materials are being used to make more efficient, reliable products and devices for energy storage and harvesting and environmental monitoring and purification. The book outlines the major sustainable, recyclable, and eco-friendly methods for using a range of graphene-based materials in innovative ways. It represents an important information source for materials scientists and engineers who want to learn more about the use of graphene-based nanomaterials to create the next generation of products and devices in energy and environmental science. Graphene-based nanotechnologies are at the heart of some of the most exciting developments in the fields of energy and environmental research. Graphene has exceptional properties, which are being used to create more effective products for electronic systems, environmental sensing devices, energy storage, electrode materials, fuel cell, novel nano-sorbents, membrane and photocatalytic degradation of environmental pollutants especially in the field of water and wastewater treatment. Covers synthesis, preparation and application of graphene based nanomaterials from different sources Demonstrates systematic approaches to the design, synthesis, characterization and applications of graphene-based nanocomposites in order to establish their important relationship with end-user applications Discusses the challenges in ensuring reliability and scalability of graphene-based nanotechnologies

Download or read book Graphite Graphene and Their Polymer Nanocomposites written by Prithu Mukhopadhyay and published by CRC Press. This book was released on 2012-10-30 with total page 631 pages. Available in PDF, EPUB and Kindle. Book excerpt: Graphite, Graphene, and Their Polymer Nanocomposites presents a compilation of emerging research trends in graphene-based polymer nanocomposites (GPNC). International researchers from several disciplines share their expertise about graphene, its properties, and the behavior of graphene-based composites. Possibly the first published monograph of its

Download or read book Polymer Nanocomposites Containing Graphene written by Mostafizur Rahaman and published by Woodhead Publishing. This book was released on 2021-08-22 with total page 817 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymer Nanocomposites Containing Graphene: Preparation, Properties and Applications provides detailed up-to-date information on the characterization, synthesis, processing, properties and application of these materials. Key topics that are covered in the book include: the methods of synthesis and preparation of graphene as well as different processes and methods of functionalization and modification of graphene for improving composite properties. The preparation techniques focus on which method is advantageous for getting improvements in properties along with their drawbacks. The structure and property relationships are also discussed in detail. The issues related to graphene dispersion in polymer matrices is also addressed as well as the use of graphene as reinforcement in thermoset resins. The different properties of the composites like mechanical, electrical, dielectric, thermal, rheological, morphology, spectroscopy, electronic, optical, and toxicity are reviewed from the geometrical and functional point of view. Applications cover electrical and electronic fields, flame and fire retardancy, structural, sensing and catalysis, membrane, in fuel cell and solar energy, hydrogen production, aerospace engineering, packaging, and biomedical/bioengineering fields. Up-to-date patents on graphene-polymer nanocomposites are also covered. Those working in graphene-based materials will benefit from the detailed knowledge presented in this book on graphene synthesis, composite preparation methods, and the related problems associated with them. The book will enable researchers to select the appropriate composite as per their respective field of application. Presents novel approaches for the preparation of graphene, its modification and nanocomposites with enhanced properties for state-of-the-art applications Special attention is given to how graphene is synthesized through different routes, their functionality, dispersion related matters and structural aspects controlling the composite properties for various applications All synthesis methodology and functionalization procedure for graphene is discussed

Download or read book Heterogeneous Photocatalysis written by M. Schiavello and published by . This book was released on 1997-10-09 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photocatalysis is a reaction which is accelerated by light while a heterogeneous reaction consists of two phases ( a solid and a liquid for example). Heterogeneous Photocatalysis is a fast developing science which to date has not been fully detailed in a monograph. This title discusses the basic principles of heterogeneous photocatalysis and describes the bulk and surface properties of semiconductors. Applications of various types of photoreactions are described and the problems related to the modeling and design of photoreactors are covered.

Download or read book Graphene Based Polymer Nanocomposites written by Andriy Nadtochiy and published by Springer Nature. This book was released on with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Graphene Oxide Metal Oxide and other Graphene Oxide Based Composites in Photocatalysis and Electrocatalysis written by Jiaguo Yu and published by Elsevier. This book was released on 2022-06-24 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Graphene Oxide-Metal Oxide and other Graphene Oxide-Based Composites in Photocatalysis and Electrocatalysis reflects on recent progress and challenges in graphene-metal oxide composites. The book reviews synthetic strategies, characterization methods and applications in photocatalysis and electrocatalysis. Graphene-metal oxides, graphene-novel metals and other composites intended for sustainable energy production, energy storage, and environmental development such as H2 production, CO2 reduction, pollutant removal, supercapacitors and lithium ion batteries are covered. Overall, this book presents a comprehensive, systematic, and up-to-date summary on graphene oxide-based materials. Graphene oxide and related composite materials bring new perspectives and prospects to both photocatalysts and electrocatalysts. The collective and synergistic effect between graphene oxide and metal oxide are manifold. The significance of the relationship among these groups of materials, their structures and performance is emphasized. Introduces the fundamentals of graphene oxides, their derivatives, common processes, principles and requirements for photocatalysis and electrocatalysis Reviews graphene-oxides for photocatalysis applications in H2 production, CO2 reduction, environment remediation, and more Covers graphene-oxides for electrocatalysis applications in energy, including supercapacitors and lithium-ion batteries

Download or read book Functionalized Graphene Nanocomposites and Their Derivatives written by Mohammad Jawaid and published by Elsevier. This book was released on 2018-11-01 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Functionalized Graphene Nanocomposites and Their Derivatives: Synthesis, Processing and Applications explains how the functionalization technique is used to create graphene nanocomposites, also exploring its current uses in industrial applications. Graphene-based nanocomposites are one of the major advancements in polymer-based materials, thus the synthesis, nanoscale dimensions, high aspect ratio, mechanical, electrical and thermal properties of graphene and its derivative have all been major areas of research in the last decade. This important reference covers these updates and is a critical book for those working in the fields of materials processing and characterization. Explains how graphene is functionalized and used in the fabrication of nanocomposites for a range of applications Explores why the properties of functionalized graphene make it such a useful, versatile material Describes, in detail, the functionalization process for utilization in graphene

Download or read book Handbook of Graphene Volume 8 written by Sulaiman Wadi Harun and published by John Wiley & Sons. This book was released on 2019-06-28 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt: The eighth volume in a series of handbooks on graphene research and applications The Handbook of Graphene, Volume 8: Technology and Innovations discusses the role of graphene-based applications in technological advancements. Topics include graphene materials used in circuit board repairs; RFID antenna and sensor fabrication; and wearable healthcare electronics. Chapters present detailed information on: modeling methods used in graphene research; applications of graphene-on-silicon photonic integrated circuits; the development of graphene for engineering applications; and other graphene subjects of interest to scientists, chemists and physicists.

Download or read book Graphene and Nanoparticles Hybrid Nanocomposites written by Abou el Kacem Qaiss and published by Springer Nature. This book was released on 2021-04-27 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the recent research on nanomaterials and nanotechnology based on the hybridization of graphene with other nanoparticles. With their simple synthesis, nanoscale dimensions, high aspect ratio, mechanical, electrical and thermal properties, graphene and its hybridized materials have witnessed a great interest, and the chapters in this book cover the spectrum of research from the preparation and synthesis of novel nanocomposites to their potential use in aeronautic, automative, energy and environmental applications. Written by respected researchers from both industry and academia, this book is of interest to researchers and students working on nanomaterials.

Download or read book Graphene and Its Derivatives written by Ishaq Ahmad and published by BoD – Books on Demand. This book was released on 2019-11-27 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Graphene and its derivatives are potential nanomaterials currently being widely investigated for diverse applications due to its exceptional mechanical, electrical, physical, and chemical properties. Examples of the applications include drug delivery, shape memory polymers, gene delivery, biosensor, tissue engineering, flexible electronic devices, antibacterial composites, photovoltaic devices, and physical sensors. Its excellent properties can be used to develop smart nanomaterials with enhanced properties for various advanced applications. There is no doubt that graphene-based nanomaterials are helping to develop next generation technologies with enhancing properties to change people's lifestyles. This book provides an overview of recent research and development of synthesis of graphene and its applications.

Download or read book Heterogeneous Nanocomposite Photocatalysis for Water Purification written by Rajendra Pawar and published by William Andrew. This book was released on 2015-04-29 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Heterogeneous Nanocomposite-Photocatalysis for Water Purification, the authors introduce various heterogeneous photocatalysts based on novel nanostructures of metal oxide semiconductors and graphene used for water purification, including TiO2, Fe2O3, SnO2, WO3 and g-C3N4, and outlines their advantages and drawbacks. The nanocomposite-photocatalysts ZnO and CdS are compared with reduced graphene oxide (rGO), a rapidly growing materials system. The authors describe how the photocatalytic activity of known nanomaterials can be improved by modifying the structural and optical properties (i.e., phase composition). Introductory portion of the book includes a brief survey of all different kinds of heterogeneous photocatalysts Discusses the possible photocatalysis mechanism occurring during the degradation of different toxic pollutants Provides the photoelectrochemical measurement for synthesized catalysts, supporting the effective transportation of photoelectrons resulting into better catalytic properties

Download or read book Handbook of Polymer and Ceramic Nanotechnology written by Chaudhery Mustansar Hussain and published by Springer. This book was released on 2021-09-13 with total page 1667 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook examines the recent advances in the nanotechnology of polymers and ceramics, which possess outstanding mechanical properties and compatibility given their unique physical and chemical properties caused by the unusually large surface area to volume ratios and high interfacial reactivity. This handbook highlights the various compositions and morphologies of polymer and ceramic nanomaterials that can serve as powerful tools for the diverse applications in areas such as electronics, photonics, shape-memory alloys, biomaterials and biomedical nanomaterials, graphene-based technologies, and textiles and packaging. The handbook addresses safety, economics, green production and sustainability. The book contains a section on functionalization of these molecules, which only increases the possibility of developing even more versatile materials that can be fine-tuned for specific applications. Filling a gap in the literature, this handbook provides comprehensive coverage of properties, fabrication, characterization, functionalization methods and applications at both experimental and theoretical models scales. Economic, toxicological, regulatory, and environmental concerns regarding applications are also discussed in detail. Special attention is paid to sustainable approaches that reduce costs in terms of chemicals and time consumption. The book covers research trends, challenges, and prospective topics as well.

Download or read book Synthesis and Characterization of Some Nanostructured Materials for Visible Light driven Photo Processes written by Rania Elhadi Adam and published by Linköping University Electronic Press. This book was released on 2020-03-18 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanostructured materials for visible light driven photo-processes such as photodegradation of organic pollutants and photoelectrochemical (PEC) water oxidation for hydrogen production are very attractive because of the positive impact on the environment. Metal oxides-based nanostructures are widely used in these photoprocesses due to their unique properties. But single nanostructured metal oxide material might suffer from low efficiency and instability in aqueous solutions under visible light. These facts make it important to have an efficient and reliable nanocomposite for the photo-processes. The combination of different nanomaterials to form a composite configuration can produce a material with new properties. The new properties which are due to the synergetic effect, are a combination of the properties of all the counterparts of the nanocomposite. Zinc oxides (ZnO) have unique optical and electrical properties which grant it to be used in optoelectronics, sensors, solar cells, nanogenerators, and photocatalysis activities. Although ZnO absorbs visible light from the sun due to the deep level band, it mainly absorbs ultraviolet wavelengths which constitute a small portion of the whole solar spectrum range. Also, ZnO has a problem with the high recombination rate of the photogenerated electrons. These problems might reduce its applicability to the photo-process. Therefore, our aim is to develop and investigate different nanocomposites materials based on the ZnO nanostructures for the enhancement of photocatalysis processes using the visible solar light as a green source of energy. Two photo-processes were applied to examine the developed nanocomposites through photocatalysis: (1) the photodegradation of organic dyes, (2) PEC water splitting. In the first photo-process, we used the ZnO nanoparticles (NPs), Magnesium (Mg)-doped ZnO NPs, and plasmonic ZnO/graphene-based nanocomposite for the decomposition of some organic dyes that have been used in industries. For the second photo-process, ZnO photoelectrode composite with different silver-based semiconductors to enhance the performance of the ZnO photoelectrode was used for PEC reaction analysis to perform water splitting. The characterization and photocatalysis experiment results showed remarkable enhancement in the photocatalysis efficiency of the synthesized nanocomposites. The observed improved properties of the ZnO are due to the synergetic effects are caused by the addition of the other nanomaterials. Hence, the present thesis attends to the synthesis and characterization of some nanostructured materials composite with ZnO that are promising candidates for visible light-driven photo-processes.

Download or read book Synthesis and Characterization of ZnO Graphene Nanostructures for Electronics and Photocatalysis written by Seyed Ebrahim Chalangar and published by Linköping University Electronic Press. This book was released on 2021-04-08 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent rapid development of electronics and electro-optical devices demands affordable and reliable materials with enhanced performance. Forming nanocomposites of already well-known materials is one possible route towards novel functional materials with desirable synergistic enhanced properties. Incompatible chemical properties, mismatched crystal structures and weak bonding interactions between the substances, however, often limit the number of possible nanocomposites. Moreover, using an inexpensive, facile, large-area and flexible fabrication technique is crucial to employ the new composites in industrially viable applications. This thesis focuses on the synthesis and characterization of different zinc oxide/graphene (ZnO/GR) nanocomposites, well suited for optoelectronics and photocatalysis applications. Two different approaches of i) substrate-free random synthesis, and ii) template-assisted selective area synthesis were studied in detail. In the first approach, ZnO nanoparticles/rods were grown on GR. The obtained nanocomposites were investigated for better GR dispersity, electrical conductivity and optical properties. Besides, by adding silver iodide to the nanocomposite, an enhanced plasmonic solar-driven photocatalyst was synthesized and analyzed. In the second approach, arrays of single, vertically aligned ZnO nanorods were synthesized using a colloidal lithography-patterned sol-gel ZnO seed layer. Our demonstrated nanofabrication technique with simple, substrate independent, and large wafer-scale area compatibility improved the alignment and surface density of ZnO nanorods over large selective growth areas. Eventually, we found a novel method to further enhance the vertical alignment of the ZnO nanorods by introducing a GR buffer layer between the Si substrate and the ZnO seed layer, together with the mentioned patterning technique. The synthesized nanocomposites were analyzed using a large variety of experimental techniques including electron microscopy, photoelectron spectroscopy, x-ray diffraction, photoluminescence and cathodoluminescence spectroscopy for in-depth studies of their morphology, chemical and optical properties. Our findings show that the designed ZnO/GR nanocomposites with vertically aligned ZnO nanorods of high crystalline quality, synthesized with the developed low-cost nanofabrication technique, can lead to novel devices offering higher performance at a significantly lower fabrication cost.