Surface modification of TiO2 nanoparticles via photocataliticaly induced reaction: Influence of functionality of silane coupling agent

• Published in: Applied surface science Vol. 264; pp. 670 - 673
• Main Authors: Tomovska, Radmila, Daniloska, Vesna, Asua, Jose M.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.2013
• Subjects: 3-triethoxysilyl propyl isocianate; Functionalized TiO2 nanoparticles; Photocatalytic surface reaction; Surface modification; UV light initiation; Functionalized TiO2 nanoparticles; Surface modification; Photocatalytic surface reaction; UV light initiation; 3-triethoxysilyl propyl isocianate
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2012.10.091

► TiO2 nanoparticles were modified by photocatalytic induced surface reaction. ► TiO2 nanoparticles were subjects of modification and catalysts for the reaction. ► No cleavage of SiC bond in silane coupling agent 3-triethoxysilyl propyl isocianate. ► High influence of functional group in silane on the SiC cleavage was determined. ► Different electronegativity of the functionalities in the silane determines reaction way. In the present work the surface modification of TiO2 nanoparticles by photocatalyticaly induced reaction with silane coupling agent 3-triethoxysilyl propyl isocianate (PIC) has been presented. It was demonstrated establishing of covalent TiOSi bond between the nanoparticles and the PIC molecule. In comparison with previous results, it was demonstrated the high influence of the functional group from the silane coupling agent on the reaction course during surface functionalziation of TiO2 nanoparticles. Depending on the amount and type (electronegativity of the end-functionalities) of the silane compound, high control of the surface characteristics of TiO2 nanoparticles could be achieved.