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Composites of Metal Nanoparticles and TiO2Immobilized in Spherical Polyelectrolyte Brushes

Title data

Lu, Yan ; Lunkenbein, Thomas ; Preussner, Johannes ; Proch, Sebastian ; Breu, Josef ; Kempe, Rhett ; Ballauff, Matthias:
Composites of Metal Nanoparticles and TiO2Immobilized in Spherical Polyelectrolyte Brushes.
In: Langmuir. Vol. 26 (2010) Issue 6 . - pp. 4176-4183.
ISSN 0743-7463
DOI: https://doi.org/10.1021/la904227f

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

The synthesis and the catalytic activity of nanocomposites consisting of metal nanciparticles (Au, Pt, Pd) and nanoparticles of TiO2 (anatase) is presented. These composite particles have been synthesized by reduction of the respective metal ions adsorbed on the Surface of as-prepared TiO2 nanoparticles that are immobilized on spherical polyclectrolyte brush particles (SPB) as carrier system, The SPB particles consist of a polystyrene core from which long chains of poly(styrene sodium sulfonate) are grafted. We demonstrate that the metal nanoparticles (such as Au, Pt, and Pd) are only generated oil the surface of the anatase particles having a size of ca. 10 nm. These metal NP/TiO2@SPB composite particles exhibit a high colloidal stability. They are excellent heterogeneous photocatalysts for the degradation of the dye Rhodamine B under UV irradiation. The photocatalytic activity of the composite particles is 2-5 times higher than that of the pure TiO2 particles. This finding is traced back to ail enhanced adsorption of the dye on the metal@TiO2 composites.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: VISIBLE-LIGHT IRRADIATION; LOW-TEMPERATURE SYNTHESIS; PHOTOCATALYTIC DEGRADATION; RHODAMINE-B; CATALYTIC-ACTIVITY; ANATASE TITANIA; DYE POLLUTANTS; METHYL-ORANGE; NANOCRYSTALS; OXIDATION
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry I
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry I > Chair Inorganic Chemistry I - Univ.-Prof. Dr. Josef Breu
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry II > Chair Inorganic Chemistry II - Univ.-Prof. Dr. Rhett Kempe
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 19 Dec 2019 08:34
Last Modified: 19 Dec 2019 08:34
URI: https://eref.uni-bayreuth.de/id/eprint/53634