Surface modification of submicronic TiO2 particles prepared by ultrasonic spray pyrolysis for visible light absorption

  • Ivan M. Dugandžić
  • Dragana J. Jovanović
  • Lidija T. Mančić
  • Nan Zheng
  • Scott P. Ahrenkiel
  • Olivera B. Milošević
  • Zoran V. Šaponjić
  • Jovan M. Nedeljković
Research Paper

DOI: 10.1007/s11051-012-1157-1

Cite this article as:
Dugandžić, I.M., Jovanović, D.J., Mančić, L.T. et al. J Nanopart Res (2012) 14: 1157. doi:10.1007/s11051-012-1157-1

Abstract

Spherical, submicronic TiO2 assemblage with high specific surface area and controllable phase composition was prepared in the process of ultrasonic spray drying/pyrolysis in a wide temperature range (150–800 °C) by using as a precursor aqueous colloidal solution consisting of TiO2 nanoparticles (4.5 nm). Submicronic, soft and grained spherical TiO2 particles (d = 370–500 nm) comprising clustered nanocrystals (<10 nm) were obtained at low processing temperature, while particle densification, intensive growth of the clustered primary units and anatase-to-rutile transformation (~30 wt%) were observed at the higher temperatures. Detailed structural and morphological characterisation were performed by X-ray powder diffraction, scanning and field emission electron microscopy, transmission electron microscopy, and laser particle size analysis. Moreover, the surface modification of TiO2 particles through the formation of charge-transfer (CT) complex was achieved with different ligands: ascorbic acid, dopamine, catechol, 2,3-dihydroxynaphthalene, and anthrarobin. Optical properties of the surface-modified TiO2 particles were studied by using diffuse reflection spectroscopy. The binding structure between the surface titanium atoms and different ligands was determined by using Fourier transform infrared spectroscopy. The formation of CT complexes induced significant red shift of optical absorption in comparison to unmodified TiO2 particles.

Keywords

TiO2 nanoparticles Spray drying/pyrolysis Surface modification Charge-transfer complex Optical properties 

Supplementary material

11051_2012_1157_MOESM1_ESM.doc (2.8 mb)
Supplementary material 1 (DOC 2918 kb)

Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • Ivan M. Dugandžić
    • 1
  • Dragana J. Jovanović
    • 2
  • Lidija T. Mančić
    • 1
  • Nan Zheng
    • 3
  • Scott P. Ahrenkiel
    • 3
  • Olivera B. Milošević
    • 1
  • Zoran V. Šaponjić
    • 2
  • Jovan M. Nedeljković
    • 2
  1. 1.Institute of Technical Sciences of SASABelgradeSerbia
  2. 2.Vinča Institute of Nuclear SciencesUniversity of BelgradeBelgradeSerbia
  3. 3.South Dakota School of Mines and TechnologyRapid CityUSA

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