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Rozprawy doktorskie na temat „Titanium Silicate”

Autor: Grafiati

Data publikacji: 2 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Scannell, Garth. "Understanding the structure and deformation of titanium-containing silicate glasses from their elastic responses to external stimuli." Thesis, Rensselaer Polytechnic Institute, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10158591.

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<p> The responses of structure and properties to composition and temperature have been investigated for glasses in TiO<sub>2</sub>-SiO<sub>2</sub> and Na<sub>2</sub>O-TiO<sub>2</sub>-SiO<sub>2</sub> systems. Additionally, the response of Na<sub>2</sub>O-TiO<sub>2</sub>-SiO<sub>2</sub> glasses to plastic deformation has been studied. (x)TiO<sub>2</sub>-(1-x)SiO<sub>2</sub> glasses were prepared through the sol-gel process with compositions 0 ≤ x ≤ 10 mol% and compared to commercial glasses prepared through flame hydrolysis deposition with x = 0, 5.4, and 8.3 mol%. (x) Na<sub>2</sub>O - (y

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2

Stephenson, Andrew William. "Microstructural studies of the formation of titanium silicide." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309148.

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Mead, Robert Nielle. "Molecular dynamics modelling of the amorphous calcium silicate and titania silicate atomic-scale structure." Thesis, University of Kent, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443767.

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4

Haddad, Zoubida. "Instabilités thermoconvectives pour des fluides complexes." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4778.

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La controverse concernant les mécanismes proposés pour l’intensification de la conductivité thermique et de la forte augmentation de la viscosité suggère que les expériences avec des nanofluides bien dispersés et correctement caractérisés seraient intéressantes. Par conséquent, nous nous sommes fixés comme objectif la caractérisation de la conductivité thermique et la viscosité de deux nanofluides “eau-oxyde de silice“ et “eau-titanium“. Il a été observé que la conductivité thermique des deux nanofluides considérés concorde bien avec la théorie du milieu effectif, à savoir, le modèle de Maxwel

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5

McIntosh, G. "Silicide precipitation in the commercial near alpha titanium base alloy IMI1829." Thesis, University of Strathclyde, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381694.

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6

Rincon, Guillermo J. "Photocatalytic Mineralization of Phenol on Fluidized Titanium Oxide-Coated Silica Gel." ScholarWorks@UNO, 2015. http://scholarworks.uno.edu/td/2009.

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A bench-scale tubular reactor with recirculation was built in order to study the efficiency of the photocatalytic oxidation of phenol on fluidized titanium oxide-coated silica gel beads. A UV-C lamp placed along the central vertical axes of the reactor was used as source of photons. A bed of silica gel beads was fluidized by means of fluid recirculation and forced to follow upward helical flow around the lamp. Anatase was successfully synthetized on silica gel particles of average diameters 224, 357 and 461 µm, as confirmed by scanning electron micrographs, through a sol-gel technique using a

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7

Cerro, Lloria Sara. "Fotocatalizadores silice-titania modificados con fotosensibilizadores." Doctoral thesis, Universitat Jaume I, 2012. http://hdl.handle.net/10803/669181.

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Los Procesos de Oxidación Avanzada (POA) se basan en procesos fisicoquímicos capaces de producir cambios profundos en la estructura química de los contaminantes. En el presente trabajo se sintetizan fotocatalizadores cerámicos de base SiO2 o TiO2 modificados con la adición de metales de transición y fotosensibilizadores orgánicos. El desarrollo de estos materiales se realiza mediante metodología sol-gel a partir de alcóxidos de Ti y/o Si. Se estudia la capacidad fotocatalítica tanto en vía húmeda (fotodegradación de Naranja II) como en vía seca (fotooxidación de NOX del aire por oxidación a ni

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8

Londeree, Danielle Julia. "Silica-titania composites for water treatment." [Gainesville, Fla.] : University of Florida, 2002. http://purl.fcla.edu/fcla/etd/UFE0000564.

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9

Robinson, Denis Joseph. "Catalytic oxidation reactions using titanium silicalite (TS-1) in conjunction with hydrogen peroxide." Thesis, University of Liverpool, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367129.

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10

Cuko, Andy. "Modelling Nano-Oxide Materials with Technological and Environmental Relevance: Silica, Titania and Titanosilicates." Doctoral thesis, Universitat de Barcelona, 2018. http://hdl.handle.net/10803/663088.

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Properties of nanomaterials are known to be size dependent and generally are very different from those of the corresponding bulk. Such behaviour, which is strongly system and structure dependent, allows one to tune material’s properties by varying their dimensions. This tunability opens up many possibilities in nanotechnology for manufacturing materials with tailored properties for specific applications. Thus, understanding size-dependent properties of nanoparticles and mechanisms taking place at the nanoscale is fundamental for the improvement of existing materials and for the designing of mo

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11

Beaudoin, Marcel Camille. "Structure and reactivity of silica-supported titanium and molybdenum(IV) amido complexes." Thesis, University of Ottawa (Canada), 2002. http://hdl.handle.net/10393/6426.

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This thesis is divided into 5 major sections. The first section covers the reactions of Ti(NR2)4 (R is methyl or ethyl) with the surface of partially dehydroxylated silica. This leads to the formation of well-defined grafted titanium complexes. The stoichiometry of the grafting reactions depends upon the degree of dehydroxylation of the silica. When the silica is pretreated at 500°C, &equiv;SiOTi(NR2)3 is formed, while on silica which has been dehydroxylated at 200°C, (&equiv;SiO) 2Ti(NR2)2 is the product. The second section examines the spontaneous transformations experienced by the b

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12

Frueh, Christian 1969. "The effect of silica-containing binders on the titanium/face coat reaction." Thesis, The University of Arizona, 1995. http://hdl.handle.net/10150/291718.

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The interactions of CP-Ti and Ti-6Al-4V with investment molds with alumina/silica and yttria/silica face coat systems, and yttria crucibles were studied. It was found that the thickness of the reaction layer (alpha case) was the same, whether a yttria/silica or alumina/silica face coat was used, indicating that it is the silica binder truly which reacts with the titanium. Furthermore, it was found that only the yttria crucible was inert to reacting with titanium when it was used as a mold. When titanium was heated in yttria crucibles, however, and held just above the liquidus for 15 s and 30 s

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13

Shin, Sang Baek. "Catalytic reaction engineering of propene epoxidation with hydrogen peroxide over titanium silicalite (TS-1)." Thesis, Imperial College London, 2011. http://hdl.handle.net/10044/1/6951.

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Propene oxide is an important chemical intermediate in the chemical industry. The propene oxide industry has employed two different types of commercial processes for several decades: the chlorohydrin process and the hydroperoxidation process. However, direct epoxidation of propene with hydrogen peroxide has recently attracted much attention as a more environmentally benign and profitable process. This thesis presents the catalytic reaction engineering of the epoxidation of propene to propene oxide using hydrogen peroxide as the oxidant and titanium silicalite (TS-1) as the catalyst under mild

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14

Yip, Chi Kin. "A catalytic architecture composed of titanium silicalite-1 and nanostructured support for oxime synthesis /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?CBME%202009%20YIP.

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15

Rice, Gordon L. "Structure and reactivity of silica-supported vanadium and vanadium/titanium single-site catalysts." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0020/NQ46540.pdf.

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16

Bouh, Abdillahi Omar. "Preparation, characterization and reactivity of mono- and dinuclear silica-supported titanium(IV) complexes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ66125.pdf.

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17

Chemweno, Maurice K. "TiO₂ photocatalyst deactivation by gas-phase oxidation of polydimethylsiloxane (PDMS) and silicone sealant off-gas in a recirculating batch reactor /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p1421122.

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18

Wang, Xiaokun. "Fabrication of electrospun fibrous meshes and 3D porous titanium scaffolds for tissue engineering." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/51724.

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Tissue engineering is a multidisciplinary field that is rapidly emerging as a promising approach for tissue repair and regeneration. In this approach, scaffolds which allow cells to invade the construct and guide the cells grow into specific tissue play a pivotal role. Electrospinning has gained popularity recently as a simple and versatile method to produce fibrous structures with nano- to microscale dimensions. These electrospun fibers have been extensively applied to create nanofiber scaffolds for tissue engineering applications. Specifically for bone and cartilage tissue engineering, polym

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19

Draai, Maryda Emily Tersia. "Exposure to silica during the production of titanium dioxide from beach sand / Maryda Emily Tersia Draai." Thesis, North-West University, 2012. http://hdl.handle.net/10394/8680.

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Silica is a common silicon dioxide (SiO2) that can be crystalline or non-crystalline (amorphous). Amorphous silica is considered to be less hazardous than crystalline silica. Three dominant crystalline polymorphs exist, with silica quartz being the most common. Exposure to respirable crystalline silica (quartz) causes silicosis, a lung scarring disease. The aim of this study was to identify and quantify the silica exposure in respirable dust personal exposure samples, as well as in representative bulk samples which are large samples taken from the sources of airborne dust obtained from differe

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20

Gazal, Yoan. "Etude de la croissance de couches minces de TiO2 et TiO2 / SiO2 par torche plasma micro-ondes à la pression atmosphérique." Thesis, Limoges, 2015. http://www.theses.fr/2015LIMO0088/document.

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Un dispositif de dépôt chimique en phase vapeur à l’air libre, utilisant une torche à injection axiale (TIA), a été développé pour l’élaboration de couches minces de TiO2 et TiO2/SiO2. Les effets des paramètres de dépôt comme la distance torche-substrat (d), la puissance micro-onde incidente et le débit de précurseur de titane (TTIP) sur (i) la morphologie et (ii) la structure cristalline des couches ont été étudiés. Dans la mesure où ces couches sont appliquées dans le domaine de la photocatalyse hétérogène, l’optimisation du procédé vise dans un premier temps à permettre l’obtention d’une gr

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21

Frost, Robert Lewis. "Slow positron annihilation spectroscopy applied to the analysis of the semiconductor, silicide, and titanium nitride structures." Diss., Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/17298.

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22

Popoff, Nicolas. "Préparation et caractérisation de complexes du groupe IV supportés sur silice et silice mono-fonctionnalisée : catalyseurs pour la polymérisation des oléfines." Thesis, Lyon 1, 2011. http://www.theses.fr/2011LYO10229.

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Ce manuscrit est consacré à l'élaboration et la caractérisation de nouveaux catalyseurs à base de métaux de transition du groupe IV neutres ou cationiques, supportés sur silice ou silices mono-fonctionnalisées, pour la polymérisation d'alpha-oléfines. Dans un premier temps une nouvelle méthode de préparation de catalyseurs neutres, pour la polymérisation des oléfines, a été mise au point, par greffage de TiCl4 sur des silices déshydroxylées à 200 ou 700°C (notées SiO2-200 ou SiO2-700) donnant une espèce unique [≡SiO-TiCl3] qui, activée par le réducteur de Mashima conduit à un catalyseur neutre

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23

Cao, Shengli. "Preparation, characterization and applications of monolithic titania-silica aerogels /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?EVNG%202007%20CAO.

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24

Vancea, Anisoara. "Energy and electron transfer on titania-silica binary oxides." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/12152.

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Steady state reflectance and emission characteristics of anthracene adsorbed on silica gel and titania-silica mixed oxides have been investigated as a function of sample loading. Titania-silica mixed oxides with 1, 3, 5 and 10 wt. % TiO2 were prepared by two different methods: a dropwise method and a sol-gel route. Ground state diffuse reflectance and fluorescence emission spectra of anthracene adsorbed on titania-silica surfaces show a dependence on titania content. The absorption peaks of anthracene are difficult to resolve at higher titania content due to the increasing red-shift of the tit

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25

Wang, Wei. "High nickel- and titania-containing mesoporous silicas : synthesis and characterisation." Thesis, Loughborough University, 2005. https://dspace.lboro.ac.uk/2134/7782.

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In order to heighten the nickel content in mesoporous silica frameworks, a new direct synthesis method, called modified DS method, has been developed instead of the commonly used direct synthesis method. In addition, with the aim of incorporating a high amount of titania into SBA-15 mesoporous silica without blocking its mesopores, a multistep impregnation method, called the MSI method, has also been developed. By using the two developed methods, high nickel- and high titania-containing mesoporous silicas obtained werc synthesized. The nickel- and titania-containing mesoporous silicas were cha

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26

Vilkinis, Paulius. "Masės pernešimo reiškiniai titano ant silicio padėklo dangose, oksiduotose vandens garų plazmoje." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140122_115239-27771.

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Darbe atlikta literatūros analizė šių procesų: (i) vykstančių vandens garų plazmoje; (ii) titano dangų oksidacija vandens garų plazmoje ir (iii) titano dioksido fotokatalitinės ir hidrofilinės savybės. TiO2 dangos buvo gautos po titano dangų ekspozicijos H2O garų plazmoje. Tyrimai parodė, kad TiO2 danga vandens garų plazmos aplinkoje formuoja elektrocheminį elementą. Darbe tirtos plazma aktyvuotos vandens skaldymo reakcijos. Parodyta, kad susidarę protonai pernešami per kietą TiO2 elektrolitą, o elektronai migruoja per plazmoje susiformavusią išorinę grandinę. Proceso metu dangos paviršinis sl

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Chen, Pengkun. "Titania and silica based hybrid porous nanomaterials : from synthesis to applications." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAF010/document.

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Mon doctorat se focalise sur la synthèse, la caractérisation et les applications de matériaux poreux à base de silice, dioxyde de titane et zéolite. La silice poreuse, le dioxyde de titane et les zéolites ont été synthétisés en utilisant des méthodologies différentes. Des matériaux de silice fonctionnalisés ont été utilisés pour des applications en adsorption de colorant, ce qui est utile pour le traitement de l'eau. Un nouveau système réticulé et un nouveau dispositif ont été créés pour améliorer la capacité d'adsorption et pour le traitement d’une grande quantité d'eau. En tirant parti des p

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28

Han, Bing. "Prevention of Cathodic Delamination of Polyurethane from Titanium by Plasma Polymerized Silica/Aminosilane Primer Systems." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1491558395253426.

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Rey, Thierry. "Contribution to the elaboration, experimentation and modeling of architectured shape memory alloy Nickel-Titanium/silicone rubber composites." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENI105.

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Les alliages à mémoire de forme Nickel-Titane sont connus pour leurs propriétés de superélasticité associées à une transformation martensitique élastique, de ferroélasticité liées à la réorientation de variantes de martensite et enfin de mémoire de forme. Les propriétés des matériaux architecturés NiTi, tels que des tricots, des matériaux cellulaires,… dépendent de celles de l'alliage NiTi constituant et de la structure géométrique. L'étude porte sur des matériaux architecturés composites constitués par des matériaux architecturés NiTi saturés par des élastomères silicones. De tels matériaux p

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Mungondori, Henry Heroe. "Development of a visible light active, photo-catalytic and antimicrobial nanocomposite of titanium dioxide and silicon dioxide for water treatment." Thesis, University of Fort Hare, 2012. http://hdl.handle.net/10353/471.

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The aim of this study was to prepare composite materials based on titanium dioxide (TiO2) and silicon dioxide (SiO2), and to evaluate their photo-catalytic and antimicrobial properties. Carbon and nitrogen doped TiO2nano-particles were prepared via a sol gel synthesis, which is a simple hydrolysis and condensation technique. In situ doping was carried out using glucose and urea as carbon and nitrogen sources respectively. Doping increased the spectral response of titanium dioxide photo-catalyst, allowing it to utilise the visible region which is much wider than the UV region (about 40 % of the

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31

Medina, Francelys A. Lanagan Michael Thomas. "Impedance spectroscopy studies of silica-titania glasses and glass-ceramics." [University Park, Pa.] : Pennsylvania State University, 2009. http://etda.libraries.psu.edu/theses/approved/PSUonlyIndex/ETD-4566/index.html.

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Zhou, Sa. "Nanonet-Based Materials for Advanced Energy Storage." Thesis, Boston College, 2012. http://hdl.handle.net/2345/3739.

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Thesis advisor: Dunwei Wang<br>When their electrodes are made of nanomaterials or materials with nanoscale features, devices for energy conversion and energy storage often exhibit new and improved properties. One of the main challenges in material science, however, is to synthesize these nanomaterials with designed functionality in a predictable way. This thesis presents our successes in synthesizing TiSi₂ nanostructures with various complexities using a chemical vapor deposition (CVD) method. Attention has been given to understanding the chemistry guiding the growth. The governing factor was

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33

Bayram, Bilal. "Photocatalytic Activity Of Titania." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12611056/index.pdf.

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TiO2 in anatase form is the most widely studied material for photocatalytic reactions. Utilization of oxide support materials such as silica with suitable transparency within band gap range of TiO2 is promising technique to obtain efficient photocatalysts for many applications. In the present study, simultaneous co-hydrolyzation of tetraethyl orthosilacate (TEOS) and titanium tetrabutaoxide (TBOT) precursors were carried out in the presence of hydrochloric acid. The effects of washing with low vapor pressure solvent(n-octane), drying conditions, hydrothermal ageing and TiO2/SiO2 ratio on the c

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34

Bragaggia, Giulia <1992&gt. "Confronto di nanoparticelle di zirconia, silice e titania per applicazioni biomediche." Master's Degree Thesis, Università Ca' Foscari Venezia, 2018. http://hdl.handle.net/10579/13531.

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Donado, Sainz de la Maza Esther. "Cobalt supported on mesoporous silicas for the Fischer-Tropsch synthesis." Thesis, KTH, Skolan för kemivetenskap (CHE), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-158473.

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This thesis deals with the study of several catalysts for the Fischer-Tropsch synthesis in the Biomass-To-Liquid process. In this work two groups of catalysts were tested. On the one hand, two series of catalysts with cobalt loadings of 6 and 12 wt% over SiO2 and some of them containing 5wt% of TiO2 were tested. One the other hand, other two series of mesoporous short channel SBA-15, all of them with cobalt loadings of 12wt% and some with 5wt% of titania. The first series was supported on SBA-15 DeWitte and the second one on SBA-15 Martinez. On the one hand, the influence of water addition to

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Fang, Lin, and Lin Fang. "Surface Engineering of Mesoporous Silica for Ti-Based Epoxidation Catalysts." Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2012. http://tel.archives-ouvertes.fr/tel-00776398.

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The active sites for epoxydation of alkenes in silica supported titanium catalysts are isolated Ti(IV) ions. The strategy for site isolation consists here to graft titanium isopropoxyde by reaction with surface silanol groups, the density of which is decreased by chemical capping instead of the energy consuming thermal treatment. The molecular stencil patterning technique (MSP) is applied to enforce site isolation. In mesostructured porous silicas, the partly extracted templating surfactant plays the role of a MSP mask during capping. Then, the elimination of the remaining surfactant liberates

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37

Ferreira, Claudia Urbano. "Propriedades de troca ionica da silica/titanio/fosfato e da silica/titanio/antimonato e eletroquimicas do azul de meldola e azul de metileno imobilizados sobre estas matrizes." [s.n.], 2000. http://repositorio.unicamp.br/jspui/handle/REPOSIP/249679.

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Orientador: Yoshitaka Gushikem<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Quimica<br>Made available in DSpace on 2018-07-27T18:24:10Z (GMT). No. of bitstreams: 1 Ferreira_ClaudiaUrbano_D.pdf: 3237137 bytes, checksum: b4ef07987de088e6e999ece0c01092e1 (MD5) Previous issue date: 2000<br>Resumo: Neste trabalho sintetizou-se o fosfato de óxido misto (=SiO)2 Ti(O3POH)2 (STP) de área superficial específica de SBET = 595 m g e volume de poro médio de 0,43 cm g. Esse material foi preparado pelo processo sol-gel e apresentou as seguintes características: Ti = 11,6% e P = 10,

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38

Cuko, Andi. "Modelling nano-oxide materials with technological and environmental relevance : silica, titania and titanosilicates Predicting size-dependent emergence of crystallinity in nanomaterials: titania nanoclusters versus nanocrystals Global optimisation of hydroxylated silica clusters: A cascade Monte Carlo Basin Hopping approach." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS368.

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Dans cette thèse, nous nous concentrons sur la modélisation des nano matériaux à base de titane, de silice et de titanosilicate en raison de leur importance technologique. Pour de tels systèmes, d'abord, nous avons identifiez les structures plus stables au moyen des méthodes d'optimisation global. Dans un deuxième temps, nous avons étudié les propriétés structurelles, énergétiques et électroniques de ces nanoparticules en fonction de leur taille, en extrapolant parfois jusqu'à l'échelle macroscopique. Pour une telle caractérisation, nous avons utilisé des méthodes quantiques basées sur la Théo

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Vogel, Robert. "Dye doped mesostructured materials for optical device applications /." St. Lucia, Qld, 2003. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17360.pdf.

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Macias, Transito Lynne. "The Design and Evaluation of a Continuous Photocatalytic Reactor Utilizing Titanium Dioxide in Thin Films of Mesoporous Silica." MSSTATE, 2003. http://sun.library.msstate.edu/ETD-db/theses/available/etd-07092003-143618/.

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Titanium dioxide (TiO2) is an established photocatalyst utilized for the photo-oxidation of organics in wastewater. Aqueous suspensions of TiO2 require separation and re-suspension steps to be used on an industrial scale. A method of immobilizing TiO2 within the mesoporous structure of silica has been developed at the University of Alabama. The objective of this thesis was to design and evaluate a bench-scale, continuous, photocatalytic reactor utilizing these films. This was accomplished in two phases of work: (1) batch reactions and (2) continuous reactions. The batch reactor was a one-liter

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Cheung, Ocean. "Narrow-pore zeolites and zeolite-like adsorbents for CO2 separation." Doctoral thesis, Stockholms universitet, Institutionen för material- och miljökemi (MMK), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-101629.

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A range of porous solid adsorbents were synthesised and their ability to separate and capture carbon dioxide (CO2) from gas mixtures was examined. CO2 separation from flue gas – a type of exhaust gas from fossil fuel combustion that consists of CO2 mixed with mainly nitrogen and biogas (consists of CO2 mixed with mainly methane) were explicitly considered. The selected adsorbents were chosen partly due to their narrow pore sizes. Narrow pores can differentiate gas molecules of different sizes via a kinetic separation mechanism: a large gas molecule should find it more difficult to enter a narr

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Vono, Lucas Lucchiari Ribeiro. "Design of nanocatalysts supported on magnetic nanocomposites containing silica, ceria and titania." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/46/46136/tde-17082016-082602/.

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Magnetic separation has received a lot of attention as a robust, highly efficient and rapid catalyst separation technology. Many studies have focused on developing methodologies for the immobilization of catalytic active species, but the development of magnetic supports has been mainly limited to silica, polymer or carbon-coated magnetic nanoparticles (NPs). The design of magnetic nanocomposites and the incorporation of other oxides are highly welcome to broaden the application of this separation technology in the field of catalysis. In this context, studies of the thermal stability of silica-

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Sardo, Infirri Rosalinda. "Light induced textile substrate with switchable and reversible wettability : Development of a switchability and reversibility effect between hydrophobic and hydrophilic states on a polyamide-66 textile substrate." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-10834.

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Biomimicry means literally ‘imitation of life’ and is providing sustainable solutions for challenges that are occurring in the human lives. To date, the biomimic research reports that wettability in nature, e.g. self-cleaning effect on a lotus leaf and a striking water strider’s leg, is related to the cooperation between the chemical composition and the topography of the surface. Moreover, this study is developing a textile substrate that goes one step further than biomimic, called ‘Biomimicking beyond nature’. The focus of this study is establishing a 100% polyamide-66 textile substrate that

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Fang, Lin. "Surface Engineering of Mesoporous Silica for Ti-Based Epoxidation Catalysts." Thesis, Lyon, École normale supérieure, 2012. http://www.theses.fr/2012ENSL0761/document.

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Les sites actifs de l’époxydation des alcènes dans les catalyseurs au titane supporté sur silice sont des ions Ti(IV) isolés. La stratégie d’isolation de site adoptée ici consiste à greffer l’isopropoxyde de titane par réaction avec les groupements silanol de surface dont la densité est diminuée par « capping » chimique remplaçant le traitement thermique usuel, très énergivore. La technique du pochoir moléculaire à motifs périodiques (PMP) a été appliquée pour forcer l’isolation de site. Dans les silices poreuses mesostructurées par un tensio-actif, c’est ce dernier, partiellement extrait, qui

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Yilmaz, Emre. "Sensitization Of Sol-gel Derived Titania-silica Photocatalytic Thin Films With Ascorbic Acid." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614226/index.pdf.

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The photocatalytic activity of semiconductor metal oxides can be improved by the addition of sensitizer which enhances the band gap by considerable red shift of the absorption edge of semiconductor. In the present study, the effect of ascorbic acid as sensitizer on the photocatalytic activity of titania-silica binary mixtures was studied. The SiO2-TiO2 mixtures having 50wt%Ti:Si composition were prepared with sol-gel method. The surface area and porosity of the samples were modified by using various amounts of polyethylene glycol (PEG) as template. The thin films of the samples were obtained b

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Korkmaz, Erdural Beril. "Photocatalytic Antimicrobial And Self-cleaning Properties Of Titania-silica Mixed Oxide Thin Films." Phd thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615137/index.pdf.

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In this study photocatalytic antibacterial and self-cleaning activities of TiO2-SiO2 thin films as a function of TiO2/SiO2 ratios were investigated. TiO2-SiO2 mixed oxides were synthesized by sol-gel method and coated over soda-lime glass plates by dip coating technique. Escherichia coli was used as a model microorganism for the photocatalytic antibacterial tests. Degradation rate of methylene blue (MB) molecules was used to characterize photocatalytic self-cleaning activities of thin film surfaces. The maximum antibacterial activity was achieved over 92 wt% SiO2 containing thin films. Howe

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Wendt, Natalja [Verfasser], and Peter [Akademischer Betreuer] Behrens. "Bioactive silica and titania coatings on implant materials / Natalja Wendt ; Betreuer: Peter Behrens." Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2018. http://d-nb.info/1172414297/34.

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Bighane, Neha. "Novel silica membranes for high temeprature gas separations." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/43732.

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Membrane materials for gas separations span a wide range including polymers, metals, ceramics and composites. Our aim is to create economical hydrothermally stable membranes that can provide high H₂-CO₂ separation at a temperature of 300 degree Celsius, for application in the water-gas shift reactor process. The present work describes the development of novel silica and silica-titania membranes from the controlled oxidative thermolysis of polydimethylsiloxane. The scope of this thesis is fabrication of membranes, material characterization and preliminary gas permeation tests (35-80 degree Cels

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Jurgens-Kowal, Teresa Ann. "Preparation and characterization of synthetic mineral surfaces : adsorption and thermal decomposition of tetraethoxysilane on magnesium oxide, molybdenum, and titanium dioxide surfaces /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/9865.

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Nunes, Claudia Carvalho. "Propriedades estruturais do material vitreo silica-titania produzido pelo metodo do aerosol em chama." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/264844.

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Orientador: Carlos Kenichi Suzuki<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-08-11T16:06:32Z (GMT). No. of bitstreams: 1 Nunes_ClaudiaCarvalho_M.pdf: 7074659 bytes, checksum: 4dec2d1e75a640341af023ba7541f5cb (MD5) Previous issue date: 2008<br>Resumo: O sistema binário sílica titânia, SiO2-TiO2,apresenta grande interesse tecnológico devido as suas propriedades: ultra-baixo coeficiente de expansão térmico e alto índice de refração. As propriedades são dependentes da quantidade de dopante presente no materi

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