Abstract
The glycoxide complexes Zn1–xCox(HCOO)(HOCH2CH2O)1/2 and Zn1−xCox(OCH2CH2O) (0 ≤ x ≤ 0.3) have been synthesized by heating ethylene glycol solutions of zinc formate Zn(HCOO)2 · 2H2O or its mixtures with cobalt formate Co(HCOO)2 · 2H2O. The crystals of these complexes have the shape of filaments (needles, bars) and distorted octahedra, respectively. A new method in which these complexes are used as the precursor is suggested for the synthesis of low-dimensional wurtzite-like Zn1−xCoxO. The shape of the precursor crystals is fully inherited by Zn1−xCoxO resulting from their heat treatment. The Zn1−xCoxO solid solutions show high photocatalytic activity in hydroquinone oxidation in aqueous solution under UV or blue light irradiation, and their activity increases as their cobalt content is increased.
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