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Structure De Gels Doxyde De Titane
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Book Synopsis Structure de gels d'oxyde de titane by : Sophie Lebon
Download or read book Structure de gels d'oxyde de titane written by Sophie Lebon and published by . This book was released on 1991 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL EST CONSACRE A L'ETUDE DE LA STRUCTURE DE GEL DE TITANE ELABORE EN PHASE MICELLAIRE INVERSE, ET A L'ETUDE DE LA CINETIQUE DE CROISSANCE DES POLYMERES D'OXYDE DE TITANE. AU MOYEN DE LA DIFFUSION DES RAYONS X ET DES NEUTRONS AUX PETITS ANGLES, ON MET EN EVIDENCE LA STRUCTURE A PETITE ECHELLE: ELLE EST DE TYPE CYLINDRIQUE ET NE VARIE PAS SI ON CHANGE LES CONDITIONS D'ELABORATION DU GEL. A PLUS GRANDE ECHELLE, LA STRUCTURE EST FRACTALE ET EVOLUE AVEC LE TAUX D'HYDROLYSE. DES EXPERIENCES EN DIFFUSION DES RAYONS X, EFFECTUEES DANS LE BAIN DE REACTION, MONTRENT QUE LA LONGUEUR DE CORRELATION EST CONTROLEE PAR LES PLUS PETITS POLYMERES DU BAIN. ELLE CONTINUE DE CROITRE APRES LE POINT DE GEL TOUT EN RESTANT MICROSCOPIQUE. LE PROCESSUS DE CROISSANCE EST COMPARABLE A CELUI ATTENDU POUR L'AGREGATION LIMITEE PAR LA DIFFUSION. GRACE A DES DONNEES EN DIFFUSION DYNAMIQUE DE LA LUMIERE, ON OBSERVE LA DIVERGENCE DU TEMPS DE RELAXATION DES FLUCTUATIONS DE CONCENTRATION AU POINT DE GEL. CECI CORRESPOND A LA FORMATION D'UN AGREGAT MACROSCOPIQUE PAR RECOMBINAISON DES PLUS GROS POLMERES SELON LE PROCESSUS D'AGREGATION CONTROLEE PAR LA REACTION
Book Synopsis Nanostructured Titanium Dioxide Materials by : Ali Reza Khataee
Download or read book Nanostructured Titanium Dioxide Materials written by Ali Reza Khataee and published by World Scientific. This book was released on 2012 with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ch. 1. Introduction -- ch. 2. Properties of titanium dioxide and its nanoparticles. 2.1. Structural and crystallographic properties. 2.2. Photocatalytic properties of nanostructured titanium dioxide -- ch. 3. Preparation of nanostructured titanium dioxide and titanates. 3.1. Vapor deposition method. 3.2. Solvothermal method. 3.3. Electrochemical approaches. 3.4. Solution combustion method. 3.5. Microemulsion technique. 3.6. Micelle and inverse Micelle methods. 3. 7. Combustion flame-chemical vapor condensation process. 3.8. Sonochemical reactions. 3.9. Plasma evaporation. 3.10. Hydrothermal processing. 3.11. Sol-Gel technology -- ch. 4. Applications of nanostructured titanium dioxide. 4.1. Dye-sensitized solar cells. 4.2. Hydrogen production. 4.3. Hydrogen storage. 4.4. Sensors. 4.5. Batteries. 4.6. Cancer prevention and treatment. 4.7. Antibacterial and self-cleaning applications. 4.8. Electrocatalysis. 4.9. Photocatalytic applications of titanium dioxide nanomaterials -- ch. 5. Supported and immobilized titanium dioxide nanomaterials. 5.1. Immobilization on glass substrates. 5.2. Immobilization on stone, ceramic, cement and zeolite. 5.3. Immobilization on metallic and metal oxide materials. 5.4. Immobilization on polymer substrates
Book Synopsis Titanium Dioxide by : Magdalena Janus
Download or read book Titanium Dioxide written by Magdalena Janus and published by BoD – Books on Demand. This book was released on 2017-07-26 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Titanium dioxide is mainly used as a pigment and photocatalyst. It is possible to find it in food, cosmetics, building materials, electric devices, and others. This book contains chapters about characteristics of anatase and rutile crystallographic structure of titanium dioxide and the use of theoretical calculation for photoactivity determination.
Book Synopsis Nanostructured Titanium Dioxide in Photocatalysis by : It-Meng Low
Download or read book Nanostructured Titanium Dioxide in Photocatalysis written by It-Meng Low and published by CRC Press. This book was released on 2021-06-18 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Titanium dioxide (TiO2) has drawn considerable attention as an attractive inorganic raw material for various applications due to its inexpensiveness, nontoxic nature, stability, and excellent photocatalytic activity. Photocatalysis is one of the most promising route for sustainable chemistry of the 21st century. It can contribute to solving environmental, global energy, and chemical problems, as well as to the sustainable production of commodities in the near future. This book presents the fundamentals of photocatalysis in nanostructured TiO2 and describes the factors affecting the photocatalytic activity, design, and synthesis of various forms of nanostructured TiO2. It highlights the use of ion-doping and inert-atmosphere annealing to extend the light-absorption range of photocatalysts and reduce recombination between electrons and holes. It discusses numerous applications in the fields of energy and environment, such as water purification, gas sensing, storage and delivery, and energy generation. The book is an invaluable resource and useful guide for a broad readership in various fields of catalysis, materials science, environment, and energy.
Download or read book Titanium Dioxide written by Dongfang Yang and published by BoD – Books on Demand. This book was released on 2018-06-27 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: Titanium dioxide is currently being used in many industrial products. It provides unique photocatalytic properties for water splitting and purification, bacterial inactivation, and organics degradation. It has also been widely used as the photoanode for dye-sensitized solar cells and coatings for self-cleaning surfaces, biomedical implants, and nanomedicine. This book covers various aspects of titanium dioxide nanomaterials including their unique one-dimensional, two-dimensional, mesoporous, and hierarchical nanostructures and their synthetic methods such as sol-gel, hydrothermal, anodic oxidation, and electrophoretic deposition, as well as its key applications in environmental and energy sectors. Through these 24 chapters written by experts from the international scientific community, readers will have access to a comprehensive overview of the recent research and development findings on the titanium dioxide nanomaterials.
Book Synopsis Structuring and filling of titania films for applications in photovoltaics by : Monika Rawolle
Download or read book Structuring and filling of titania films for applications in photovoltaics written by Monika Rawolle and published by Cuvillier Verlag. This book was released on 2013-04-02 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Kurzbeschreibung Die Möglichkeiten, Titandioxid Nanostrukturen zu synthetisieren, sowie die erhaltenen Strukturen rückzubefüllen, werden mit Hinblick auf Anwendungen in der Photovoltaik in der vorliegenden Arbeit untersucht. Auf Titandioxid basierende Solarzellen werden in Hybridsolarzellen und in Farbstoffsolarzellen unterteilt. Das Hauptaugenmerk der Untersuchungen liegt auf der Korrelation zwischen Morphologie und Funktion der resultierenden Strukturen. Die verschiedenen untersuchten Systeme und die damit verbundenen Fragestellungen umfassen zum einen die Strukturierung von Titandioxid und zum anderen das Rückbefüllen dieser Strukturen. Die Synthese von Titandioxid wird mittels Sol-Gel Chemie vorgenommen. Die Strukturen werden in der Synthese durch Blockcopolymertemplate vorgegeben. Die damit hergestellten dünnen Filme von Titandioxid zeigen eine hohe Porosität, mit einer Schwammartigen Morphologie die sowohl Mesoporen als auch Makroporen aufweist. Die Strukturen werden in dünnen Filmen und in einem nanostrukturierten Tropfen untersucht. Eine Verbesserung der Strukturen durch die Kombination der Sol-Gel Synthese mit Mikrofluidik wird ebenfalls diskutiert. Zudem wird eine mögliche Syntheseroute bei niedrigen Temperaturen vorgestellt, die es erlaubt kristallines Titandioxid zu erhalten. Die Stabilität der Strukturen gegen die Kapillarkräfte bei der Infiltrierung von Wasserdampf wird getestet. Um funktionierende Solarzellen zu erhalten, müssen die Titandioxidnanostrukturen mit einem lochleitenden Material gefüllt werden. Der Grad der Rückbefüllung mit lochleitenden Materialien korreliert mit der Funktion in Solarzellen. Description In the presented thesis, the possibilities to synthesize titania nanostructures and the possibilities to fill the resulting nanostructures by other materials are investigated for photovoltaic applications. The solar cells based on titania are distinguished either as hybrid or as dye-sensitized solar cells. The main focus of the investigations lies on the correlation of the morphology and the functionality of the obtained thin films. The different investigated systems and related questions comprise the structuring of titania on the one hand, and the filling of the structures on the other hand. Sol-gel chemistry in combination with block copolymers as structure templates is applied to obtain titania thin films with a sponge-like morphology, which shows a high porosity and both mesopores and macropores. The structures are investigated in thin films, but also in a nanostructured drop of titania. Improvement of the structures by the combination of micro-fluidics with the templated sol-gel is also discussed. Furthermore, a low temperature synthesis route is examined to obtain crystalline titania. The stability of the resulting titania films is checked for water vapor infiltration with the resulting capillary forces. In order to obtain working solar cells, the titania nanostructures need to be filled by hole-conducting materials. The degree of filling of the structures with hole-conducting organic materials is related to the functionality of the solar cells.
Book Synopsis Wood modification with titania and silica based precursors by : Muhammad Shabir (Mahr)
Download or read book Wood modification with titania and silica based precursors written by Muhammad Shabir (Mahr) and published by Cuvillier Verlag. This book was released on 2013-11-26 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis ETUDE THEORIQUE DE LA STRUCTURE ET DE LA REACTIVITE DU DIOXYDE DE TITANE by : ADIL.. FAHMI
Download or read book ETUDE THEORIQUE DE LA STRUCTURE ET DE LA REACTIVITE DU DIOXYDE DE TITANE written by ADIL.. FAHMI and published by . This book was released on 1993 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: DANS LE BUT D'ETUDIER L'ORIENTATION DE LA CRISTALLISATION DE TIO#2 EN PRESENCE D'ACIDES CARBOXYLIQUES, NOUS AVONS D'ABORD ETUDIE LES DEUX PHASES LES PLUS STABLES (LE RUTILE ET L'ANATASE) PUIS LES PROPRIETES D'ADSORPTION. LES DIFFERENCES D'ENERGIE ENTRE CES DEUX PHASES APPARAISSENT DES LORS QUE L'ON PERMET DES DEFORMATIONS ANGULAIRES. CELLES-CI RESULTENT D'UN COMPROMIS ENTRE L'ENVIRONNEMENT LOCAL DU TITANE (OCTAEDRIQUE) ET CELUI DE L'OXYGENE (TRIANGULAIRE). SUR UNE SURFACE PROPRE DU DIOXYDE DE TITANE, IL Y A DES SITES ACIDES DE LEWIS (LES ATOMES DE TITANE INSATURES) QUI PERMETTENT L'ADSORPTION DE MOLECULES HYDROXYLEES (H#2O, MEOH ET HCO#2H). CETTE ADSORPTION EST DISSOCIATIVE A CAUSE DE LA PRESENCE D'ATOMES D'OXYGENES TRES BASIQUES. LORSQUE L'ADSORPTION EST MOLECULAIRE, LA LIAISON ADSORBAT-SUBSTRAT EST IONIQUE ET FAIBLE. SON ENERGIE DEPEND DE LA BASICITE DE LA MOLECULE ET DE LA CHARGE SUR L'ATOME DE TITANE. LORSQUE L'ADSORPTION EST DISSOCIATIVE, LES LIAISONS ENTRE LES FRAGMENTS DE L'ADSORBAT ET LE SUBSTRAT SONT COVALENTES ET FORTES. L'ENERGIE D'ADSORPTION AINSI QUE LE MECANISME DE DISSOCIATION DEPENDENT DU CARACTERE ACIDO-BASIQUE DE LA SURFACE PROPRE. L'ETUDE DE L'ADSORPTION D'ACIDES POLYFONCTIONNELS (EX. L'ACIDE MALIQUE) MET EN EVIDENCE L'IMPORTANCE DE L'ENERGIE DE DEFORMATION DES ADSORBATS: CEUX-CI DOIVENT ADOPTER UNE CONFORMATION REPLIEE POUR QUE LA MOLECULE PUISSE S'ADSORBER PAR PLUSIEURS FONCTIONS
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1995-05 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Génération in Situ de Dioxyde de Titane Par Réactions D'hydrolysecondensations Dans Une Matrice Polymère Fondu by : Walid Bahloul
Download or read book Génération in Situ de Dioxyde de Titane Par Réactions D'hydrolysecondensations Dans Une Matrice Polymère Fondu written by Walid Bahloul and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polypropylene/Titanium dioxide (PP/TiO2) nanocomposites were prepared from an original method based on the hydrolysis-condensation reactions of titanium alkoxide inorganic precursor premixed with PP under molten conditions. The synthesis is based on sol-gel method without solvent through extrusion process. A second treatment in hot water was applied in order to improve final conversion degree. First, hydrolysis-condensation reactions of titanium n-butoxide precursor were studied in model medium. Based on a kinetic equation carried out in the model medium, then the synthesis of titanium dioxide particles was transposed and modelled in polypropylene medium with high molar mass. Chemical, structural and morphological analyses highlight the in situ synthesis of bactericides PP/TiO2 nanocomposites andpresenting a particular morphological and rheological behaviour.
Book Synopsis Clean by Light Irradiation by : Vincenzo Augugliaro
Download or read book Clean by Light Irradiation written by Vincenzo Augugliaro and published by Royal Society of Chemistry. This book was released on 2010 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book deals with the environmentally friendly cleaning materials functionalized with TiO2, a widely known semiconductor giving rise to redox reactions under artificial or solar irradiation. The role of titanium dioxide in the worldwide community is introduced first. The fundamental working principles of heterogeneous photocatalysis follow and a critical section on the semiconductor bulk and surface properties open the way to the differences between TiO2 blend features with respect to analogous thin film layouts. Then Follows the main section of the book which deals with the techniques applied to manufactured commercial devices, ranging from glasses to textiles and from concrete and other construction materials to paintings. Also road asphalt and other devices, such as photocatalytic air conditioning machines are outlined. Last generation materials, not yet commercialized, and the deposition techniques applied to prepare them are also widely discussed. The final part of the book covers the difficult and modern topic of standardization and comparison of performance of photocatalytic processes and in particular the guidelines proposed by various worldwide organizations for standardization are discussed. The book covers the general matters as well as the practical applications with the supporting methods discussed in detail. This book brings together a team of highly experienced and well-published experts in the field, providing a comprehensive view of the applications of supported titanium dioxide.
Book Synopsis Application of Titanium Dioxide by : Magdalena Janus
Download or read book Application of Titanium Dioxide written by Magdalena Janus and published by BoD – Books on Demand. This book was released on 2017-07-26 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Titanium dioxide is mainly used as a pigment and photocatalyst. It is possible to find it in food, cosmetics, building materials, electric devices, and others. This book contains chapters about application of titanium dioxide in different branches of economy such as the agriculture, the food industry, the medicine, the cosmetics, the water treatment technologies, and the semiconductors.
Download or read book SCAD Bulletin written by and published by . This book was released on 1989 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Chemical Sciences written by and published by . This book was released on 2006 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2004 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Metal Oxide Nanoparticles in Organic Solvents by : Markus Niederberger
Download or read book Metal Oxide Nanoparticles in Organic Solvents written by Markus Niederberger and published by Springer Science & Business Media. This book was released on 2009-09-17 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxide Nanoparticles in Organic Solvents discusses recent advances in the chemistry involved for the controlled synthesis and assembly of metal oxide nanoparticles, the characterizations required by such nanoobjects, and their size and shape depending properties. In the last few years, a valuable alternative to the well-known aqueous sol-gel processes was developed in the form of nonaqueous solution routes. Metal Oxide Nanoparticles in Organic Solvents reviews and compares surfactant- and solvent-controlled routes, as well as providing an overview of techniques for the characterization of metal oxide nanoparticles, crystallization pathways, the physical properties of metal oxide nanoparticles, their applications in diverse fields of technology, and their assembly into larger nano- and mesostructures. Researchers and postgraduates in the fields of nanomaterials and sol-gel chemistry will appreciate this book’s informative approach to chemical formation mechanisms in relation to metal oxides.
Book Synopsis Gazette Du Bureau Des Brevets by : Canadian Intellectual Property Office. Patent Office
Download or read book Gazette Du Bureau Des Brevets written by Canadian Intellectual Property Office. Patent Office and published by . This book was released on 1997 with total page 1218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
