Influence of Re and Ru doping on the structural, optical and photocatalytic properties of nanocrystalline TiO2

Abstract

TiO 2 and TM-doped TiO 2 (TM = Re, Ru) anatase crystalline nanopowders were synthesized by a simple hydrothermal method. Samples with nominal TM/Ti ratio of 0.01 were prepared for this study. Their structural, microstructural and optical properties were studied. The lattice parameters of the different prepared samples were calculated and their mean crystallite sizes determined to be in the range 15-7 nm, the lower values being obtained for the doped crystallites. The samples' specific surface areas were determined and correlated with their mean crystallite sizes. The incorporation of the dopant elements results in an increase of the optical absorption in the visible range. The samples' optical bandgap and Urbach energies were calculated from UV-Vis diffuse reflectance spectra. The photocatalytic behavior of the synthesized samples was investigated for the rhodamine B and phenol degradation processes, the kinetics of the different photo-oxidation reactions being also studied. The results showed that doping either with Re or Ru can lead to enhancement of the TiO 2 photocatalytic efficiency and that, among the synthesized samples Ru-doped TiO 2 is the most efficient photocatalyst for both the Rhodamine B and phenol photodegradation reactions.

Fabrication of ternary polyaniline‐titanium dioxide‐polypyrrole (PANI‐TiO2‐PPy) nanocomposite as an efficient polymer electrode for supercapacitors

“…The diffraction peaks at 2 θ = 25.3°, 37.8°, 48.01°, 55.05°, 62.6°, 68.7, 70.2°, and 75.01° are indexed to (1 0 1), (0 0 4), (2 0 0), (2 1 1), (2 0 4), (1 1 6), (2 2 0), and (2 1 5) crystalline planes, respectively. These diffraction peaks match well with standard JCPDS 21‐1272 70 . No other peaks were observed in the XRD pattern indicating the purity of TiO 2 nanoparticles.…”

Dataset for the synthesis, characterisation and application of cobalt and nitrogen co-doped TiO2 anatase nanoparticles on triclosan photodegradation using visible LED light

“…By refining a previously published hydrothermal methodology [4 , 5] , TiO 2 -based nanoparticles (NPs) doped with nitrogen (TiO 2 -N) were prepared. The synthesis conditions of nitrogen doped TiO 2 nanoparticles add to and complement our previously reported work [1] .…”

Investigations on structural, optical, and impedance spectroscopy studies of titanium dioxide nanoparticles

“…The peaks of Figure 1 can be indexed as a tetragonal phase of TiO 2 nanoparticles with a lattice constant of a = 3.7852 Å and c = 9.5139 Å, in good agreement with JCPDS card no. 21-1272 [14]. In prepared TiO 2 nanoparticles, the peak at 25.5 o corresponding to the plane (101).…”