Download or read book Ion Permeation Through Graphene Oxide Membranes written by Jijo Abraham and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Study of Ion and Solvent Transport Through Graphene Oxide Membranes written by Kai Wang and published by . This book was released on 2016 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filtration membranes are required to be thin, robust, energy efficient, and accurate on selectivity. Graphene oxide (GO) is believed to be a potential next generation material for industrial membrane applications because of its unique properties such as strong mechanical strength, excellent aqueous solution processability, and great flexibility for membrane fabrication. Research on the transport models, the separation performance, and the functionalization of GO membranes has been developed. However, many mechanisms of mass transport through GO membranes still remain debatable. In this work, GO was synthesized, and then functionalized with linear amine-terminated poly(ethylene glycol) (PEG) and aluminum ions (Al). The fabrication and characterizations of GO, PEG-GO, and Al-GO membranes were demonstrated in this work. Water and water/ethanol binary mixture transport through GO, PEG-GO, and Al-GO membranes were studied to investigate the permeation and the rejection rates of solvents through GO-based membranes. The total volumetric flux of water/ethanol mixture through GO membranes was inversely proportional to the viscosity of the solvent mixtures. The steric hindrance effect and the interactions between the solvent molecules and the membrane surfaces dominated the rejection rate of ethanol through GO membranes. The functionalization of GO modified the pore size and the porosity of the membranes, resulting in faster permeation of solvents and reduced rejection rates of ethanol through PEG-GO and Al-GO membranes. Deformation of nanochannels within the functionalized GO membranes was observed when the membranes were operated under highly pressurized conditions. Diffusive transport of two charge equivalent and structurally similar ruthenium complex ions Ru(bpy)32+ and iv Ru(phen)32+ through GO, PEG-GO, and Al-GO membranes were also studied. Our data showed high similarity with the results reported previously in the literature, indicating that the GO and functionalized GO membranes used in this work were highly consistent. Due to the enlarged pore sizes and the reduced interactions between ions and the membrane surfaces, the flux of ions through PEG-GO membranes was 300% higher than that through GO membranes. In contrast, permeation of ions through Al-GO membranes was slower than that through GO membranes. The blocked nanopores and the electrostatic repulsion between the intercalated aluminum ions and complex ions were the main reasons for this observation. In addition, the main reason for the significant permeance difference between Ru(bpy)32+ and Ru(phen)32+ ions was confirmed as the steric hindrance effect. This work contributes to the basic research on GO membranes in potential applications. It can be beneficial to the academic laboratories for understanding the mechanism of mass transport through GO-based membranes. These new membrane materials could replace traditional membrane materials in many industrial applications in the future.

Download or read book Graphene based Membranes for Mass Transport Applications written by Pengzhan Sun and published by Royal Society of Chemistry. This book was released on 2018-09-21 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive overview of graphene-based membrane materials and its applications.

Download or read book Ceramic Membranes for Separation and Reaction written by Kang Li and published by John Wiley & Sons. This book was released on 2007-04-30 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ceramic Membranes for Reaction and Separation is the first single-authored guide to the developing area of ceramic membranes. Starting by documenting established procedures of ceramic membrane preparation and characterization, this title then focuses on gas separation. The final chapter covers ceramic membrane reactors;- as distributors and separators, and general engineering considerations. Chapters include key examples to illustrate membrane synthesis, characterisation and applications in industry. Theoretical principles, advantages and disadvantages of using ceramic membranes under the various conditions are discussed where applicable.

Download or read book Carbon Nanomaterials for Nanofluidic and Membrane Applications written by Mike Coleman and published by . This book was released on 2014 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: The successful fabrication and characterization of carbon nanomaterials as potential next generation materials for nanofluidic and membrane applications was demonstrated by this work. Ion transport through graphene oxide (GO) membranes of various thicknesses were investigated in order to determine the effect of steric interactions on ion selectivity. The diffusive transport rates of two charge equivalent ruthenium complex ions [Ru(bpy)3]^2+ and [Ru(phen)3]^2+, with a sub-angstrom size difference, were distinguishable through GO membranes and were used as a model to investigate pore and slit-dominant hindered diffusion. Analysis of experimental results suggested that ion transport is mostly facilitated by large pores (> 1.75 nm in diameter) in relatively thin GO membranes, while slits formed by GO stacking ( 1.42 nm in width) become dominant only in thick membranes. Furthermore, the interlayer spacing and overall pore structure of GO was engineered in order to optimize ion transport rates and create stimuli-sensitive membranes. This was completed by functionalizing GO with two different polymers; linear poly(ethylene) glycol (PEG-L), and poly (N-isopropylacrylamide) (PNIPAm). The addition of both PEG-L and PNIPAm polymers altered the nanofluidic channel geometry, significantly increasing the overall ion flux relative to pristine GO membranes. Analysis of the diffusive transport rates of [Ru(bpy)3]^2+ and [Ru(phen)3]^2+ through PEGylated GO membranes showed that the shorter PEG-L polymers tightened up and closed the larger pores, increasing the flux and selectivity while the longer polymers opened up the overall porous structure, increasing flux but not altering the observed selectivity. Ion permeation was recorded through PNIPAm-functionalized membranes for two different temperatures; T

Download or read book Dielectric Phenomena in Solids written by Kwan Chi Kao and published by Elsevier. This book was released on 2004-05-11 with total page 601 pages. Available in PDF, EPUB and Kindle. Book excerpt: In general, a dielectric is considered as a non-conducting or insulating material (such as a ceramic or polymer used to manufacture a microelectronic device). This book describes the laws governing all dielectric phenomena. · A unified approach is used in describing each of the dielectric phenomena, with the aim of answering "what?", "how?" and "why" for the occurrence of each phenomenon;· Coverage unavailable in other books on ferroelectrics, piezoelectrics, pyroelectrics, electro-optic processes, and electrets;· Theoretical analyses are general and broadly applicable;· Mathematics is simplified and emphasis is placed on the physical insight of the mechanisms responsible for the phenomena;· Truly comprehensive coverage not available in the current literature.

Download or read book Two Dimensional Materials Based Membranes written by Gongping Liu and published by John Wiley & Sons. This book was released on 2022-08-08 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two-Dimensional-Materials-Based Membranes An authoritative and up to date discussion of two-dimensional materials and membranes In Two-Dimensional-Materials-Based Membranes: Preparation, Characterization, and Applications, a team of distinguished chemical engineers delivers a comprehensive exploration of the latest advances in design principles, synthesis approaches, and applications of two-dimensional (2D) materials—like graphene, metal-organic frameworks (MOFs), 2D layered double hydroxides, and MXene—and highlights the significance and development of these membranes. In the book, the authors discuss the use of membranes to achieve high-efficiency separation and to address the challenges posed in the field. The book also discusses potential challenges and benefits in the future development of advanced 2D nanostructures, as well as their impending implementation in applications in the fields of energy, sustainability, catalysis, electronics, and biotechnology. Readers will also find: A thorough introduction to fabrication methods for 2D-materials-based membranes, including the synthesis of nanosheets, membrane structures, and fabrication methods Descriptions of three types of 2D-materials-based membranes: single-layer membranes, laminar membranes and mixed-matrix membranes Comprehensive discussions of 2D-materials-based membranes for water and ions separation, solvent-water separation and gas separation Explorations of transport mechanism of 2D-materials-based membranes for molecular separations Perfect for membrane scientists, inorganic chemists, and materials scientists, Two-Dimensional-Materials-Based Membranes will also earn a place in the libraries of chemical and process engineers in industrial environments.

Download or read book Functional Membranes for High Efficiency Molecule and Ion Transport written by Jingtao Wang and published by Springer Nature. This book was released on 2023-01-23 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an overview of functional membranes for efficient ion/molecule transfer and separation. It first presents the design, fabrication, structure, and performance of several kinds of membranes. Then, the application of membrane technology in organic solvent nanofiltration, hydrogen fuel cells, and solid-state lithium batteries is introduced. Furthermore, the book proposes strategies of strengthening the ion/molecular-level separation and transfer process in membrane processes. It also analyzes the development status, existing problems, and optimization methods in the field of membranes and membrane processes. Finally, it highlights the construction strategy of membrane structures, the structure–performance relationships as well as the transfer and separation mechanisms. The target group of this book is academics and researchers in materials science, chemical engineering, biomedical engineering, and other related fields.

Download or read book Electrically Conductive Membrane Materials and Systems written by Farah Ahmed and published by CRC Press. This book was released on 2023-05-04 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrically Conductive Membrane Materials and Systems offers in-depth insight into the transformative role of electrically conductive materials in membrane separation processes for desalination and water treatment. The book focuses on the intelligent design of conductive membranes and systems, fouling and related phenomena, fouling control using electrically conductive materials, and electrically tunable membrane systems for microfiltration, ultrafiltration, nanofiltration, reverse osmosis, and membrane distillation. With rising concerns around inaccessibility to freshwater and the ever increasing threats of population growth, climate change, and urban development, the book brings electrically conducting materials to the forefront of membrane separation technology with an emphasis on their role in the mitigation of fouling and related phenomena. Electrically conducting materials expand the versatility of membrane technology and ultimately improve access to safe water. The book is important reading for scientists, engineers, entrepreneurs, and enthusiasts from the water industry who seek to familiarize themselves with a groundbreaking area of study within modern desalination and water treatment. • Explores novel membrane materials and systems from preparation methods, materials selection, and their application in monitoring, fouling control, and performance enhancement. • Examines the mechanism of fouling prevention and cleaning in various electrically conductive materials. • Evaluates the scalability of antifouling materials and coatings, as well as electrically enhanced processes for monitoring and control in membrane separation technology. • Assesses advantages and limitations of applying electrically conductive membrane systems to fouling control for specific water treatment applications. • Provides a critical review of scientific literature in the specialized area of electrical conductive materials and systems for membrane technology.

Download or read book Graphene Oxide written by Wei Gao and published by Springer. This book was released on 2015-05-28 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on a group of new materials labeled "graphene oxides." It provides a comprehensive overview of graphene oxide-based nanomaterials in terms of their synthesis, structures, properties, and extensive applications in catalysis, separation, filtration, energy storage and conversion. The book also covers emerging research on graphite oxides and the impact of the research on fundamental and applied sciences.

Download or read book Graphene based Membranes for Mass Transport Applications written by Hongwei Zhu and published by Royal Society of Chemistry. This book was released on 2018-09-21 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is great interest in the novel mass-transport properties of graphene-based membrane materials, especially for environmental applications such as wastewater treatment and reuse, gas separation and water desalination. Graphene-based Membranes for Mass Transport Applications is a comprehensive overview of the research in this area. Starting with current state-of-the-art membrane-based filtration and separation technologies, the book then explores the structure, composition and general properties of graphene-based membranes including nanoporous graphene and graphene oxide followed by the selective mass transport properties of the membranes. The final chapters look at their specific use in barrier applications, purification and separation applications and water desalination. Edited by leading researchers, the book provides an introduction and reference to physicists, chemists, material scientists, chemical engineers and students who are entering or already working in the field of graphene-based membrane materials.

Download or read book Graphene Technology written by Soroush Nazarpour and published by John Wiley & Sons. This book was released on 2016-06-23 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filling the gap between publications for industrial developers and academic researchers on graphene synthesis and its applications, this book presents the essential aspects for the successful upscaling of graphene production. After an introduction to graphene, its synthesis and characterization, the text covers a wide variety of graphene composites and compounds. The larger part of the book discusses various applications where graphene has been successfully integrated into technologies, including uses in the energy sector, oil and gas industry, biomedical areas, sensors and coatings. Finally, the book concludes with a summary and a look at the future of graphene technology, including a market review. With its focus on applications, this is equally useful for both academic and industrial users.

Download or read book Graphene Science Handbook written by Mahmood Aliofkhazraei and published by CRC Press. This book was released on 2016-04-27 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: An In-Depth Look at the Outstanding Properties of GrapheneThe Graphene Science Handbook is a six-volume set that describes graphene's special structural, electrical, and chemical properties. The book considers how these properties can be used in different applications (including the development of batteries, fuel cells, photovoltaic cells, and supe

Download or read book MXenes and their Composites written by Kishor Kumar Sadasivuni and published by Elsevier. This book was released on 2021-10-07 with total page 796 pages. Available in PDF, EPUB and Kindle. Book excerpt: MXenes and their Composites: Synthesis, Properties and Potential Applications presents a state of the art overview of the recent developments on the synthesis, functionalization, properties and emerging applications of two-dimensional (2D) MXenes and their composites.The book systematically describes the state-of-the-art knowledge and fundamentals of MXene synthesis, structure, surface chemistry and functionalization. The book also discusses the unique electronic, optical, mechanical and topological properties of MXenes. Besides, this book covers the various emerging applications of MXenes and their composites across different fields such as energy storage and conversion, gas sensing and biosensing, rechargeable lithium and sodium-ion batteries, lithium-sulphur and multivalent batteries, electromagnetic interference shielding, hybrid capacitors and supercapacitors, hydrogen storage, catalysis and photoelectrocatalysis, gas separation and water desalination, environmental remediation and medical and biomedical applications. All these applications have been efficiently discussed in the specific chapters and in each case, the processing of MXene composites has also been discussed.This book will be an excellent reference for scientists and engineers across various disciplines and industries working in the field of highly promising 2D MXenes and their composites. The book will also act as a guide for academic researchers, material scientists, and advanced students in investigating the new applications of 2D MXenes based materials. Covers fundamentals of technologically important MAX phases, MXene derivatives, MXene synthesis methods, intercalation and delamination strategies, surface functionalization, fundamental characteristics and properties Demonstrates major application areas of MXenes, including catalytic, energy storage and energy generation, flexible electronics, EMI shielding, sensors and biosensors, medical and biomedical, gas separation and water desalination Presents a detailed discussion on the processing and performance of various MXenes towards different applications

Download or read book Emerging Membrane Technology for Sustainable Water Treatment written by Rajindar Singh and published by Elsevier. This book was released on 2016-03-10 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emerging Membrane Technology for Sustainable Water Treatment provides the latest information on the impending crisis posed by water stress and poor sanitation, a timely issue that is one of the greatest human challenges of the 21st century. The book also discusses the use of membrane technology, a serious contender that can be used to confront the crisis on a global scale, along with its specific uses as a solution to this escalating problem. Provides a unique source on membrane technology and its application for water treatment Focuses on technologies designed for the treatment of seawater and brackish water Highlights the most economically and environmentally friendly membrane technologies Lists various technologies and emphasizes their link to renewable energy, energy efficiency, nanotechnology, reuse, and recycle

Download or read book Sustainable Nanoscale Engineering written by Gyorgy Szekely and published by Elsevier. This book was released on 2019-09-18 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainable Nanoscale Engineering: From Materials Design to Chemical Processing presents the latest on the design of nanoscale materials and their applications in sustainable chemical production processes. The newest achievements of materials science, in particular nanomaterials, opened new opportunities for chemical engineers to design more efficient, safe, compact and environmentally benign processes. These materials include metal-organic frameworks, graphene, membranes, imprinted polymers, polymers of intrinsic microporosity, nanoparticles, and nanofilms, to name a few. Topics discussed include gas separation, CO2 sequestration, continuous processes, waste valorization, catalytic processes, bioengineering, pharmaceutical manufacturing, supercritical CO2 technology, sustainable energy, molecular imprinting, graphene, nature inspired chemical engineering, desalination, and more. Describes new, efficient and environmentally accepted processes for nanomaterials design Includes a large array of materials, such as metal-organic frameworks, graphene, imprinted polymers, and more Explores the contribution of these materials in the development of sustainable chemical processes

Download or read book World Scientific Reference Of Water Science The In 3 Volumes written by and published by World Scientific. This book was released on 2022-09-16 with total page 1446 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water is an indispensable resource for our society. Essential to sustaining life and economic prosperity, water is also the basic component for manufacturing almost everything to keep society alive, including energy, food, clothing, cars, and electronics, among many other examples. It is, thus, an integral part of our lives beyond simply quenching our thirst. In addition, our future economy and security highly depend upon the availability of clean water. Yet given its critical importance, there is a limited supply of renewable freshwater across the globe and there is no substitute. Global population and economic growth, urbanization, and climate change further exacerbate the increasing stress on freshwater supplies. As such, society urgently needs to find the scientific and engineering solutions to more efficiently manage our precious water resources. The volumes of this multi-volume reference cover the latest scientific advancements and solutions in managing and treating this crucial resource.Related Link(s)