Photocatalytic composite materials based on graphene and titanium oxide prepared by different methods

0446354 - ÚACH 2016 RIV PT eng C - Conference Paper (international conference)
Tolasz, Jakub - Vomáčka, Petr - Štengl, Václav - Bludská, Jana
Photocatalytic composite materials based on graphene and titanium oxide prepared by different methods.
Proceedings of the 7th ECCOMAS Thematic Conference on Smart Structures and Materials (SMART 2015). Ponta Delgada: IDMEC, 2015 - (Araújo, A.; Mota Soares, C.). ISBN 978-989-96276-8-0.
[ECCOMAS Thematic Conference on Smart Structures and Materials (SMART 2015) /7./. Ponta Delgada (PT), 03.06.2015-06.06.2015]
R&D Projects: GA MŠMT(CZ) ED3.1.00/14.0328
Institutional support: RVO:61388980
Keywords : photocatalysis * graphene * titanium oxide
Subject RIV: CA - Inorganic Chemistry
http://www.dem.ist.utl.pt/smart2015/files/SMART_2015_Proceedings/PDF/Papers/SMART2015_122.pdf

Titanium(IV) oxide - graphene [1] or graphene oxide nano composite [2] were prepared by one-pot thermal hydrolysis of suspension graphene or graphene oxide nanosheets and titanium oxide in three different forms as a starting materials. Graphene nanosheets were produced in a large quantity from natural graphite using a high intensity cavitation field in a pressurized ultrasonic reactor [3]. The graphene oxide was prepared by improved Hummers method [4]. The direct interaction between TiO2 nanoparticles and graphene sheet prevents the re-agregation of the exfoliated sheets of graphene. Graphene and even graphene oxide has the ability to locally reduce the titanium to active form of Ti3+ ion. The grapheme nanosheets make Ti3+ ions stable in the TiO2 matrix and form a heterojunction system with titania.
Permanent Link: http://hdl.handle.net/11104/0248379