Enhancement of TiO₂photocatalytic activity by Gd³⁺doping

Abstract

Gd 3z doped TiO 2 nanopowders were successfully synthesised by sol-gel method using gadolinium nitrate and tetra-n-butyl titanate as the precursors. The as prepared nanopowders were characterised by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results indicated that Gd 3z doping effectively inhibits the phase transformation from anatase to rutile until 700uC, which was propitious to promote the catalytic activity of the catalysts. The fine and uniform Gd 3z doped TiO 2 nanopowders with the size of 10-15 nm were obtained using the 0 . 75 g L 21 hydroxypropyl cellulose (HPC) as dispersant for the excellent steric stabilisation. Compared with the nanocrystalline TiO 2 , the Gd 3z doped TiO 2 nanopowders exhibited higher photocatalytic activity to methylene blue degradation.

Synthesis, Impedance and Current-Voltage Spectroscopic Characterization of Novel Gadolinium Titanate Nano Structures

“…Rare earth titanate NS exhibits interesting dielectric, piezoelectric, and ferroelectric properties as reported in the literature [11][12][13]. However, Gd possesses a half-filled 4f-shell and an empty 5d shell which imparts unique electronic configuration and stability to GdTiO3 NS [14].…”

Characterisation of titania nanotubes supported gold particles for MTBE photocatalytic degradation

“…The photocatalytic methods have most widely used to degrade and mineralise many organic wastes in water. An important advantage of the photocatalytic system is a high rate of reaction and a cost-effective method [1,6,7].…”