Synthesis of ZrO₂:Fe nanostructures with visible-light driven H₂ evolution activity

Abstract

In this paper, the ZrO 2 :Fe nanostructures with precisely controlled Fe doping contents are obtained by using a template method. The characterizations obviously show that the as-prepared samples have hollow sphere-like morphology and high crystalline quality. Furthermore, the band gap of the ZrO 2 :Fe nanostructures is facilely tunable by controlling the Fe content. In addition, the density-functional theory (DFT) calculation reveals that the formation of an impurity band in the band gap narrows the band gap of the Fe-doped ZrO 2 nanostructures. The visible-light driven photocatalytic activity of ZrO 2 nanostructures could be remarkably enhanced by doping the Fe impurity. This can be attributed to the red shift of the absorption edge and the trapping effect of the ZrO 2 :Fe nanostructures. The research results provide a general and effective method to synthesize different photocatalysts with enhanced visible-light driven H 2 evolution activity.

Passivation of defect states in anatase TiO2 hollow spheres with Mg doping: Realizing efficient photocatalytic overall water splitting

“…Our Mg-doped TiO 2 (Mg-TiO 2 ) ultrathin hollow spheres were synthesized by ions adsorption and templating method (Fig. S1) [34]. Inductive coupled plasma and atomic absorption spectroscopy (ICP-AAS) measurements reveals that the Mg contents in Mg-TiO 2 samples are varied from 0, 0.1, 0.5 to 1% (Mg/(Mg + Ti)) gradually with increasing the Mg content in adsorbed solution.…”

Development of Nano-tetragonal Zirconia-Incorporated Ni–P Coatings for High Corrosion Resistance

“…A broad band with a peak at 557 cm -1 and a shoulder peak at 645 cm -1 was observed that revealed the presence of Zr-O vibrations in the nano-tetragonal zirconia [30,[63][64][65][66][67]. IR bands at 3428 cm -1 and 1627 cm -1 in the spectrum were attributed to the stretching and bending vibrations of the O-H bond due to the presence of physisorbed water molecules present on the surface of the nanotetragonal zirconia [63][64][65], whereas the weak band at 1384 cm -1 was attributed to the absorption of non-bridging O-H groups [50]. Sharp band around 746 cm -1 was absent, which ruled out the presence of monoclinic zirconia in the nano-zirconia [25].…”

Synthesis of Bi2S3nanorods supported on ZrO2semiconductor as an efficient photocatalyst for hydrogen production under UV and visible light

“…However, as a wide band‐gap semiconductor (5.0 eV), ZrO 2 can only be excited under UV‐light irradiation. A further improvement for hydrogen production can be achieved by combining ZrO 2 with different semiconductors, as reported in the literature . The use of metal sulfides deposited on metal oxides for hydrogen production has been previously reported .…”