Search for dissertations about: "nanocrystalline tio2 films"

Found 5 swedish dissertations containing the words nanocrystalline tio2 films.

2. 1. Nanostructured Transition Metal Oxides in Cleantech Application : Gas Sensors, Photocatalysis, Self-cleaning Surfaces Based on TiO2, WO3 and NiO

   Author : Zareh Topalian; Lars Österlund; Andrew Mills; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Gas sensing; Self-cleaning; photo-fixation; photocatalysis; TiO2; WO3; NiO; Surface engineering; Ytbehandlingsteknik; Functional materials; Funktionella material; Engineering Science with specialization in Solid State Physics; Teknisk fysik med inriktning mot fasta tillståndets fysik;

   Abstract : This thesis focuses on the application of nanocrystalline transition metal oxide TiO2, WO3 and NiO thin films in new “green” building technologies. Specifically, their physicochemical properties in photocatalytic, self-cleaning and gas sensing applications are studied. READ MORE

4. 2. Fabrication and Characterization of Composite TiO2/Carbon Nanofilms with Enhanced Photocatalytic Activity

   Author : Raja Sellappan; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TiO2; carbon; photoluminescence; photodegradation; recombination.; Photocatalysis;

   Abstract : The work presented in this thesis is dedicated to fabrication and characterization of an efficient thin film photocatalyst for environmental cleaning and solar fuel applications. Because of its simplicity and reproducible fabrication, the chosen combination of nanometer thin titania and carbon films serves also as a model system for a wider class of photoactive materials. READ MORE

5. 3. Infrared spectroscopy studies of adsorption and photochemistry on TiO2 surfaces : From single crystals to nanostructured materials

   Author : Andreas Mattsson; Lars Österlund; Per-Anders Carlsson; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering Science with specialization in Solid State Physics; Teknisk fysik med inriktning mot fasta tillståndets fysik;

   Abstract : TiO2 based photocatalysis is a green nanotechnology that can be used for removal of pollutants from water and air, as well as making synthetic fuels from water and carbon dioxide. Said photocatalysis has received major research interests during the last decades. READ MORE

6. 4. Charge Transport Properties in Nanostructured Electrodes of Metal Oxides

   Author : Niclas Beermann; James Durrant; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; Iron oxide; titanium dioxide; nanostructured; photoelectrochemistry; charge transport; morphology; incorporation; Fysik; Physics; Fysik; Physical Chemistry; fysikalisk kemi;

   Abstract : In the last decade research in the field of nanostructured metal oxide thin film electrodes for various applications, e.g., solar cells and hydrogen production, has been of great interest. In this thesis, interfacial and bulk electrochemical properties and charge transport properties of nanostructured thin films have been investigated. READ MORE

7. 5. Emerging Energy Possibilities

   Author : Joanna Wiberg; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; electron transfer; dye-sensitized solar cells; D-B-A; femtosecond transient absorption;

   Abstract : This Thesis presents a thorough study of the electron transfer (ET) processes, both inter-molecular - between dyes for dye-sensitized solar cells (DSSCs), and intra-molecular - in porphyrin based electron donor-bridge-electron acceptor model systems. The focus has been on charge separation and subsequent re-combination in the femtosecond-nanosecond range in both systems. READ MORE