Design and photocatalytic activity of nanosized zinc oxides

Selective photocatalytic conversion of methane into carbon monoxide over zinc-heteropolyacid-titania nanocomposites

“…Relatively small effect of the promotion with Zn is observed on the band gap. The ZnO band gap energy is a function of crystallite size and varies from 3.12 to 3.30 eV 33 . Zinc carbonate also has semiconductor properties; its band gap is situated at 3.36 eV 34 .…”

Design of core–shell titania–heteropolyacid–metal nanocomposites for photocatalytic reduction of CO2 to CO at ambient temperature

“…Note that both zinc oxide and zinc carbonate have semiconductor properties; their band gaps vary from 3.12 to 3.36 eV. 51,52 The catalysts were characterized by high-resolution transmission electron microscopy (HRTEM), high angle annular dark-eld scanning TEM (HAADF-STEM) and STEM-EDX elemental mapping (Fig. 7a and 8).…”

Sonochemical catalysis as a unique strategy for the fabrication of nano-/micro-structured inorganics

“…[72] Uzunov et al once utilized different methods (i.e., precipitation, mechanochemical treatment and sonochemical process) to prepare nanosized zinc oxides, and three products had various morphologies with a crystallite size below 20 nm. [73] Interestingly, the ZnO nanorods from the sonochemistry-assisted process exhibited the highest photocatalytic activity for the degradation of malachite green under UV irradiation, and the polycrystalline zinc oxide from the precipitation-assisted process had a better photocatalytic efficiency under visible irradiation, but on the contrary, the nano-sized ZnO from the mechanochemistry-assisted process deteriorated the photocatalytic activity because of the inhomogeneous size distribution.…”