Synthesis of TiO2-x/W18O49 hollow double-shell and core-shell microspheres for CO2 photoreduction under visible light

Jeannie Z. Y. Tan, Stelios Gavrielides, Meltiani Belekoukia, Warren A. Thompson, Leila Negahdar, Fang Xia, M. Mercedes Maroto-Valer, Andrew M. Beale

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Abstract

TiO2-x/W18O49 with core-shell or double-shelled hollow microspheres were synthesized through a facile multi-step solvothermal method. The formation of the hollow microspheres with a double-shell was a result of the Kirkendall effect during the solvothermal treatment with concentrated NaOH. The advanced architecture significantly enhanced the electronic properties of TiO2-x/W18O49, improving by more than 30 times the CO2 photoreduction efficiency compared to the pristine W18O49. Operando DRIFTS measurements revealed that the yellow TiO2-x was a preferable CO2 adsorption and conversion site.

Original languageEnglish
JournalChemical Communications
Early online date27 Aug 2020
DOIs
Publication statusE-pub ahead of print - 27 Aug 2020

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