Adsorption At Solid Liquid Interfaces Studied With Surfaces Sensitive Techniques

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Adsorption At Solid Liquid Interfaces Studied With Surfaces Sensitive Techniques

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Author : Lei Wang
language : en
Publisher:
Release Date : 2016

Adsorption At Solid Liquid Interfaces Studied With Surfaces Sensitive Techniques written by Lei Wang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.

Proteins At Solid Liquid Interfaces

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Author : Philippe Déjardin
language : en
Publisher: Springer Science & Business Media
Release Date : 2006-09-28

Proteins At Solid Liquid Interfaces written by Philippe Déjardin and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-09-28 with Science categories.

This book opens with a description of fundamental aspects of protein adsorption to surfaces, a phenomenon that plays a key role in biotechnological applications, especially at solid-liquid interfaces. Presented here are methods for studying adsorption kinetics and conformational changes such as optical waveguide lightmode spectroscopy (OWLS). Also described are sensitive bench techniques for measuring the orientation and structure of proteins at solid-liquid interfaces, including total internal reflection ellipsometry (TIRE), dual polarisation interferometry (DPI) and time of flight - secondary ion mass spectrometry (TOF–SIMS). A model study of fibronectin at polymer surfaces is included, as are studies using microporous membranes and textiles with immobilized enzymes for large-scale applications. Biocompatibility, anti-fouling properties and surface modification to modulate the adsorption and activity of biomolecules are among the other topics addressed in this invaluable book.

Dynamics Of Adsorption At Liquid Interfaces

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Author : S.S. Dukhin
language : en
Publisher: Elsevier
Release Date : 1995-04-11

Dynamics Of Adsorption At Liquid Interfaces written by S.S. Dukhin and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995-04-11 with Technology & Engineering categories.

As the first of its kind, this book provides a valuable introduction for scientists and engineers interested in liquid/fluid interfaces and disperse systems to the rapidly developing area of adsorption dynamics. It is the first extensive review available on the subject of dynamics of adsorption and gives a general summary of the current state of adsorption kinetics theory and experiments. Current progress in recently designed set-ups and improved and generalised known methods for studying interfacial relaxations is reviewed. In addition, the role of the electric charge of surfactants in the adsorption process is discussed in terms of a non-equilibrium distribution of adsorbing ions in the diffuse layer. Present theories of the effect of dynamic adsorption layers on mobile surfaces, such as moving drops and bubbles, based on both diffusion and kinetic controlled adsorption models are described and efficient approximate analytical methods to solve the mathematical problem of coupling surfactant transport and hydrodynamics are introduced. The role of a dynamic adsorption layer in bubble rising, film drainage and film stabilisation and in complex processes such as flotation and microflotation is discussed. Containing more than 1100 references, the book is essential reading for industrial scientists and graduate and post-graduate students in physical, surface and colloid chemistry, physico-chemical hydrodynamics, water purification and mineral processing.

Adsorption And The Gibbs Surface Excess

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Author : D. Chattoraj
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Adsorption And The Gibbs Surface Excess written by D. Chattoraj and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.

The subject matter of this book is not entirely new in that much has been written about the state of the interfacial chemistry in other textbooks. However, the authors have found that there is really a need for a book which can lead an investigator, a student, or a beginn er through the in-depth understanding and descriptions involved in the derivations and usage of the adsorption equations based on the unified concept of the Gibbs surface excess. The derivation of the original Gibbs equation for the liquid interface has been amplified with reformulations and criticisms. Attempts have been frequently made to relate the surface excess quantities with the thermodynamic properties of the physically defined interfacial phase. In the last two decades, useful applications of the Gibbs equations have been made for the study of adsorption at solid-liquid as weIl as liquid-gas interfaces formed in the presence of the multicomponent solutions in the bulk. These recent treatments become useful for the experimental studies of the adsorption of electrolytes and interfacial properties related to neutral and charged monolayers. The consistency of the experimental results with those to be expected from the theories of the electrical double layer needs careful examination. An attempt has been made to present in a single volume all these developments based on the unified concept of the Gibbs surface excess. The study of the adsorption from solution is of considerable importance in the field of biology and in many other branches of applied science.

In Situ And Operando X Ray Spectroscopy Studies Of Solid Gas And Solid Liquid Interfaces

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Author : Chenghao Wu
language : en
Publisher:
Release Date : 2015

In Situ And Operando X Ray Spectroscopy Studies Of Solid Gas And Solid Liquid Interfaces written by Chenghao Wu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.

Gas-phase catalytic reactions and electrochemical reactions are two important categories of heterogeneous reactions. In order to determine the reaction mechanisms and potentially improve the technologies based on these reactions, it is essential to understand what happens at relevant solid/gas or solid/liquid interfaces under reaction conditions. X-ray photoelectron spectroscopy (XPS) and x-ray absorption spectroscopy (XAS) are two element-specific and chemical-state-specific characterization techniques. Recently, researchers have demonstrated that with proper modifications, these vacuum-requiring techniques can also be used to characterize various solid/gas or solid/liquid interface systems under ambient conditions, which opens the way towards in situ and operando characterization of many heterogeneous reaction systems. In this dissertation, the studies on two solid/gas interface systems and two solid/liquid interface systems are presented. The solid/gas interface systems were characterized by ambient-pressure XPS (AP-XPS). In the study regarding Co catalyst for Fischer-Tropsch (F-T) synthesis, it was found that CO adsorbs strongly on Co surface; but small amount of sulfur substantially weakens the CO adsorption and consequently poisons the F-T reaction. Under reaction conditions, Co surface remains metallic. At lower temperatures, water molecules in the reaction products can potentially oxidize the Co surface and thereby hinder the catalytic reaction. When the reaction temperature is above 250°C, H2 is responsible for reducing Co to its metallic phase and keeping the catalyst active. In the study of CoxPdy alloy nanoparticles for catalyzing CO oxidation reaction, a clear dependence of catalytic activities on nanoparticle composition was observed. AP-XPS results revealed that Co segregates to the surface and stays in the oxide form after the pretreatment process. Small amount of Co coexisting with Pd on the surface can promote the CO oxidation reaction synergistically and the synergetic effect becomes more prominent with increasing Co content. However, when Co/Pd ratio is too high, after the cleaning processes, the surface of the nanoparticles is fully covered by thin layers of CoOx, preventing CO molecules from binding with Pd, which leads to significant drop in catalytic activity of the alloy nanoparticles. The solid/liquid interface systems were characterized by our newly developed in situ and operando XAS technique. Total electrode yield (TEY) signal collected through the working electrode can provide information that is sensitive to the solid/liquid interfaces. At Au/H2O interfaces, the hydrogen-bonding network is greatly disrupted by the interface, leaving more broken hydrogen bonds than in bulk water. But the delocalization of the LUMO orbitals of water molecules into the gold substrate, greatly suppresses the pre-edge feature in O1s XAS spectrum that is typically associated with broken hydrogen bonds. These polar molecules can respond to external electrical field and reorient at the interface, producing potential-dependent O1s TEY XAS spectra. At Pt/H2SO4(aq) or Au/H2SO4(aq) interfaces, similar water reorientation behaviors were observed in the negative potential region. In the positive potential regions, the evolution of O1s XAS spectra is different from that of Au/H2O system. The changes in the spectra are possibly related to the adsorption of sulfate ions at the interface, contradicting many reports that proposed an oxide formation or oxygen/ hydroxyl adsorption processes. The studies on four interface systems presented in this dissertation illustrate the capabilities and great potentials of these two in situ x-ray spectroscopy techniques, i.e., AP-XPS and in situ/operando XAS, in the investigation of interfacial phenomena and reaction mechanisms in various heterogeneous reactions. Such mechanistic information can potentially provide insightful guidance for better designs of catalysts and electrode materials.

Adsorption From Solution At The Solid Liquid Interface

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Author : G. D. Parfitt
language : en
Publisher:
Release Date : 1983

Adsorption From Solution At The Solid Liquid Interface written by G. D. Parfitt and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Science categories.

Non-electrolytes. Adsorption of small molecules. Adsorption from mixtures of miscible liquids. Adsorption of nonionic surfactants. Adsorption of polymers. Electrolytes. Adsorption of small ions. Adsorption of ionic surfactants. Adsorption of dyes. Adsorption of polyelectrolytes from dilute solution.

Physical Methods Of Chemistry Investigations Of Surfaces And Interfaces

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Author : Bryant W. Rossiter
language : en
Publisher: John Wiley & Sons
Release Date : 1993-01-12

Physical Methods Of Chemistry Investigations Of Surfaces And Interfaces written by Bryant W. Rossiter and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993-01-12 with Science categories.

Each volume of this series heralds profound changes in both the perception and practice of chemistry. This edition presents the state of the art of all important methods of instrumental chemical analysis, measurement and control. Contributions offer introductions together with sufficient detail to give a clear understanding of basic theory and apparatus involved and an appreciation of the value, potential and limitations of the respective techniques. The emphasis of the subjects treated is on method rather than results, thus aiding the investigator in applying the techniques successfully in the laboratory.

Adsorption At The Gas Solid And Liquid Solid Interface

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Author : Kenneth Sing
language : en
Publisher: Elsevier
Release Date : 2009-06-04

Adsorption At The Gas Solid And Liquid Solid Interface written by Kenneth Sing and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-06-04 with Technology & Engineering categories.

Adsorption at the Gas-Solid and Liquid-Solid Interface

Adsorption From Solution

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Author : R. H. Ottewill
language : en
Publisher: Elsevier
Release Date : 2012-12-02

Adsorption From Solution written by R. H. Ottewill and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-02 with Science categories.

Adsorption From Solution discusses the significance of adsorption behavior in thermodynamic terms, with emphasis on the interplay between enthalpic and entropic contributions to the free energy. This book examines the role of simple models and of elementary thermodynamic and statistical mechanical arguments in relation to the concept of surface phase. Organized into 22 chapters, this book starts with an overview of the theoretical model for the solid/liquid interface. This text then proceeds with a discussion of the general thermodynamic treatment of adsorption from mixed solvents, which is designed to apply in situations where adsorbed species may be regarded as distinct from their bulk counterparts. Other chapters discuss the adsorption from solutions of various interfaces of liquid/gas, liquid/liquid, or liquid/solid. The final chapter deals with the roles of adsorption from solution in controlling other phenomena, such as liquid–liquid displacement, wetting, and the forces between colloidal particles. Physicists, chemists, and materials scientists will find this book extremely useful.

Adsorption At The Gas Solid And Liquid Solid Interface Studies In Surface Science And Catalysis

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Author :
language : en
Publisher:
Release Date : 1982

Adsorption At The Gas Solid And Liquid Solid Interface Studies In Surface Science And Catalysis written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with categories.