Energy Band Structure and Photocatalytic Property of Fe-doped Zn₂TiO₄Material

Abstract

<TEX>$Zn_2Ti_{1-x}Fe_xO_4\;(0\;{\leq}\;x\;{\leq}\;0.7)$</TEX> photocatalysts were synthesized by polymerized complex (PC) method and investigated for its physico-chemical as well as optical properties. <TEX>$Zn_2Ti_{1-x}Fe_xO_4$</TEX> can absorb not only UV light but also visible light region due to doping of Fe in the Ti site of <TEX>$Zn_2TiO_4$</TEX> lattice because of the band transition from Fe 3d to the Fe 3d + Ti3d hybrid orbital. The photocatalytic activity of Fe doped <TEX>$Zn_2TiO_4$</TEX> samples for hydrogen production under UV light irradiation decreased with an increase in Fe concentration in <TEX>$Zn_2TiO_4$</TEX>. Consequently, there exists an optimized concentration of iron for improved photocatalytic activity under visible light (<TEX>${\lambda}{\leq}$</TEX>420 nm)