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One-step approach for in-situ decoration of TiO2 nanotubes with magnetic nanoparticles

Authors: Beketova Darya | Motola Martin | Sopha Hanna Ingrid | Čičmancová Veronika | Dvořák Filip | Hromádko Luděk | Macák Jan

Year: 2019

Type of publication: ostatní - přednáška nebo poster

Page from-to: nestránkováno

Titles:

Language	Name	Abstract	Keywords
eng	One-step approach for in-situ decoration of TiO2 nanotubes with magnetic nanoparticles	Magnetic micro/nanoparticles are widely exploited in many biotechnological or biomedical applications [1,2]. There are also complex inorganic and magnetically guidable materials, such as combinations of TiO2, Al2O3, SiO2 oxides of different morphologies with superparamagnetic nanoparticles, that are utilized e.g. for purification of biomolecules, such as proteins or peptides [3-5]. However, in many of these works, the superparamagnetic particles are deposited onto the inorganic oxide matrix from commercially available colloidal suspensions yielding only limited adhesion of the particles to the matrix. Unwanted detachment from the matrix and contamination of the surrounding environment may occur. It is necessary to develop synthetic routes, that will establish strong chemical bonds and sufficiently good binding of the particles to the matrix. In this work, we propose facile, one-pot solvothermal approach based on the synthesis of iron oleate complex and its subsequent decomposition to decorate 1D anodic TiO2 nanotubes with magnetite nanoparticles. The resulted composite materials were decorated with the 14-28 nm semi-spherical nanoparticles in inner and outer shell of the nanotubes. In contrast to various techniques, the approach ensures a stability of the as-prepared material under any subsequent treatment. Influence of oleic acid and iron precursor concentration, duration of synthesis was investigated, and optimal synthesis conditions were found. The as-prepared materials represent promising magnetically guidable photocatalysts in biomedicine for drug delivery [6]. [1] Gijs M. et al. Chem. Rev. 2010, 110, 1518−1563. [2] Schladt T. D. et al. Dalton Trans. 2011, 40, 6315−6343 [3] Ma W.-F. et al. ACS Nano. 2012, 6, 3179−3188 [4] Ni, Q. et al. Chromatogr. 2016, 30, 566−573. [5] Kupcik R. et al ACS Appl. Mater. Interfaces 2017, 9, 28233−28242 [6] D. Beketova et al., Ms in preparation.