Synthesis of TiO<sub>2−x</sub>/W<sub>18</sub>O<sub>49</sub> hollow double-shell and core–shell microspheres for CO<sub>2</sub> photoreduction under visible light
Jeannie Z. Y. Tan, Stelios Gavrielides, Meltiani Belekoukia, Warren Thompson, Leila Negahdar, Fang Xia, M. Mercedes Maroto‐Valer, Andrew M. Beale
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.
Topics & Concepts
MicrosphereShell (structure)Materials scienceVisible spectrumCore (optical fiber)NanotechnologyChemical engineeringOptoelectronicsComposite materialEngineeringAdvanced Photocatalysis TechniquesGa2O3 and related materialsGas Sensing Nanomaterials and Sensors