Synthesis of Titania-Based Janus Nanoparticles and their Surface-Functionalization (Nano Initiative N1001-NAN)

01.02.2007 - 31.01.2009
Forschungsförderungsprojekt
Goal of the project is the investigation of novel techniques for the synthesis of photocatalytic active titania nanoparticles consisting of an anisotropic surface functionalization and their attachment to different organic supports. The so called Janus nanoparticles will be prepared using wet chemical techniques in emulsions of immiscible solvents comprising different polarity. Titania nanoparticles prepared by various techniques will by used as stabilizing agents at the interface between the solvents, forming so called Pickering emulsions, leading to discriminable environments that allow chemical reactions on two separate sites of the particles under different conditions. This method will permit a differentiating surface functionalization resulting in Janus-type titania nanoparticles consisting of both, a pure TiO2 surface and a surface that enables a stabile interaction with an organic matrix preventing photocatalytic decomposition at the interface between the inorganic particle and an organic support. This barrier layer will be composed by a silica shell that can be tuned in its thickness and that can be organically functionalized in a second step, or by organic molecules that are attached to the surface of the titania particles via anchor groups that are stable against photocatalytic decomposition. The photocatalytic activity of the resulting particles will be studied and compared to commonly used materials. The nanoparticles are functionalized with reactive organic groups that allow a stable, preferably covalent, attachment to different organic supports, such as polycarbonate, melamine or poly(methyl methacrylate). In addition possibilities for the embedment of the particles into an organic matrix and their driving force to diffuse to the surface of organic thin films will be investigated. The formed titania particle containing nanocomposite thin films will be studied with regard to their photocatalytic activity and the decomposition behaviour towards the organic matrix.

Personen

Projektleiter_in

Projektmitarbeiter_innen

Institut

Grant funds

  • FWF - Österr. Wissenschaftsfonds (National) Austrian Science Fund (FWF)

Forschungsschwerpunkte

  • Non-metallic Materials: 20%
  • Structure-Property Relationsship: 20%
  • Sustainable Production and Technologies: 20%
  • Surfaces and Interfaces: 20%
  • Materials Characterization: 20%

Schlagwörter

DeutschEnglisch
NanopartikelNanoparticles
PhotokatalysePhotocatalysis
OberflächenfunktionalisierungSurface-functionalization
Beschichtungencoatings

Externe Partner_innen

  • Seibersdorf Labor GmbH

Publikationen