| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 236003 | Powder Technology | 2014 | 8 Pages |
•Egg shaped Cus@TiO2 shell particle was synthesized.•The pathway bridged between Cu, glycol, and Ti was proposed.•The egg shaped structure was stable at high temperature more than 600 °C.
Egg shaped particles formed with micro-CuS cores capsulated perfectly by TiO2 nano-porous shells were synthesized from 1, 2-ethylene glycol additive in ethanol using a sol–gel procedure. The optimal CuS:TiO2 molar ratio to obtain the egg shaped CuS core@TiO2 shell was 1:7. TEM revealed an egg shape composed of CuS core@TiO2 shell micro-particles with a size ranging from 200 to 400 nm. This paper proposes the mechanism of the formation of egg shaped and core-shell structured CuS@TiO2 particles based on the pathway of a bridge among Cu, 1, 2-ethylene glycol, and the Ti complex during crystal growth. The core CuS was covered completely by porous TiO2 and was quite stable at temperatures greater than 600 °C.
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