Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 247 for “"photocatalysis"”.
-
Laser photocatalysis.
… in wastewater treatment. Although semiconductor photocatalysis for water treatment has been extensively investigated over the past 20 years this is the first reported use of laser light as an irradiation source. The destruction of 4-chlorophenol with conventional UV lamps and laser radiation has …
-
Optofluidic Microreactors for Advanced Photocatalysis
… advanced characterization technique to monitor photocatalysis. The use of HC-PCFs as the core element of a newly developed characterisation platform has many benefits: HC-PCF’s light-guiding abilities and low-loss properties make absorp- tion spectroscopy based screening of reaction …
-
Super-ambient temperature gas phase photocatalysis
<p class="MsoNormal">This thesis is concerned with the use of a continuous flow gas phase photocatalytic system to produce hydrogen as a cleaner fuel source. M/TiO2 photocatalysts (where M is Pt, Pd, Au and Ag) was used in a continuous flow gas phase photocatalytic system. Two main reactions were …
-
Titania-based nanocomposites for solar photocatalysis
This thesis explores several titania-based composites for photocatalytic water treatment and hydrogen evolution. For water treatment, TiO$_2$-C core-shell composites were prepared through controlled hydrolysis of titanium alkoxides followed by calcination in a non-oxygenating atmosphere. A total of …
-
Solar energy conversion via photovoltaics and photocatalysis
Due to the forthcoming shortage of natural resources, the demand for more efficient and ecofriendly chemical processes for the conversion of energy and matter, especially with respect to carbon management, is growing rapidly. Therefore, a search for high-performance solar energy conversion systems …
-
Density functional theory calculations on materials in photocatalysis
Solar energy which possesses many advantages such as high energy capacity and exhaustive resources has been considered to be the most promising energy to fulfill the growing energy appetite. To effectively harvest the solar energy, photocatalytic water splitting reaction, which transfers the solar …
-
Metal-TiO2 nanocomposites towards efficient solar-driven photocatalysis
… water purification methods, TiO2-based photocatalysis has attracted great attention due to material stability, abundance, non-toxicity and high decontamination efficiency. In this material, electron-hole pairs, generated by light absorption, separate from each other and migrate to …
-
Ligand participation in energy storage electrocatalysis and photocatalysis
The electrochemical or photochemical production of fuels using energy from the sun is an attractive approach for storing solar energy. However, the development of efficient and inexpensive catalysts is necessary to facilitate these reactions. While a number of molecular catalysts do exist for this …
-
Quantum Yields And Mechanism In Titanium Dioxide Mediated Photocatalysis
The photocatalytic pathway in TiO{dollar}sb2{dollar} suspensions was examined using a spin trap/EPR technique within a competition kinetic scheme. Experimental results from competition reactions indicate that there is a marked difference in kinetic behaviours between the systems with …
-
The application of colloidal photocatalysis in actinide photoredox chemistry
… of this project is to explore the use of photocatalysis in metal ion redox chemistry leading to an assessment of its potential for application within nuclear reprocessing. Consequent to this, the scientific objective of this project is to identi& factors contributive to efficient …
-
Label-free tracking of photocatalysis on a single nanoparticle
Nanocatalysis is a rapidly growing field where nanoparticles are exploited to catalyze industrially relevant chemical reactions. The successful design of these heterogeneous catalysts is hindered by our limited understanding of the chemical dynamics occurring in the working environment of a …
-
Electronic band engineering: Titanium dioxide particulate layers for photocatalysis
… with many application advantages for photocatalysis. However, in the porous films that typify applications, photogenerated charge carriers typically drive reactions inefficiently due to fast recombination. To mitigate this problem, this work employs electronic band engineering …
-
Strategies for sustainable photocatalysis: hybrid organometallo-silica materials and BODIPYs
El gran desarrollo que ha experimentado en los últimos años el empleo de reacciones fotocatalíticas en síntesis de compuestos orgánicos de gran relevancia, junto con la progresiva aplicación de estas reacciones en la industria ha hecho deseable la búsqueda de sistemas fotocatalíticos más …
-
Nitrate Radical-Mediated Oxidative Cleavage of Olefins Using TiO2 Photocatalysis
… highlights the potential of nitrate radical photocatalysis for sustainable chemical manufacturing, addressing limitations of traditional oxidative cleavage methods. By providing a cleaner, efficient pathway for producing industrially relevant compounds, it advances the understanding of …
-
Rational Design and Synthesis of Epitaxial Nano-Heterostructures for Photocatalysis
L'abstract è presente nell'allegato / the abstract is in the attachment
-
Novel Nanostructured Titania and Titania Nanocomposites for Photovoltaics and Photocatalysis
… cost and wide applications in photovoltaics and photocatalysis. This research is focused on novel synthesis and surface modification of TiO2 nanotube arrays for applications in advanced dye-sensitized solar cells (DSSCs) and efficient photocatalysis. The first part of this work entails fast …
-
Development of a microfluidic device for blood oxygenation by photocatalysis
… (TiO₂), thin film that generates oxygen through photocatalysis with a microfluidic network that facilitates diffusion of the dissolved oxygen to red blood cells. While true pulmonary respiration relies on passive diffusion of oxygen gas from the environment to the blood, the proposed device …
-
The destruction of the cyanobacterial toxin microcystin-LR by semiconductor photocatalysis.
… the toxin is not destroyed. Recently the use of photocatalysis was shown to rapidly degrade microcystin-LR even at high concentrations. The process involves the illumination of a titanium dioxide catalyst with ultraviolet (UV) light to produce highly oxidising hydroxyl radicals in solution. While …
-
Bismuth Tungstate Photocatalysis for N-Nitrosamines Removal from Amine Washing Wastewater
… like N-nitrosamines is extremely important. Photocatalysis, an Advance oxidation process (AOP) which uses UV light source and semiconductor catalysts is studied for degradation of organic and inorganic pollutants. Photocatalysis is used in this study for treating N-Nitrosodiethylamine (NDEA) …
Page 1 of 13