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

doi:10.1039/d0cc04036c

Synthesis of TiO_{2- x}/W₁₈O₄₉ hollow double-shell and core-shell microspheres for CO₂ photoreduction under visible light

Chem Commun (Camb). 2020 Oct 13;56(81):12150-12153. doi: 10.1039/d0cc04036c.

Authors

Jeannie Z Y Tan¹, Stelios Gavrielides¹, Meltiani Belekoukia¹, Warren A Thompson¹, Leila Negahdar², Fang Xia³, M Mercedes Maroto-Valer¹, Andrew M Beale²

Affiliations

¹ Research Centre for Carbon Solutions (RCCS), Heriot-Watt University, Edinburgh EH14 4AS, UK. j.tan@hw.ac.uk.
² Department of Chemistry, UCL, 20 Gordon Street, London, WC1H 0AJ, UK and UK Catalysis Hub, Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell, Oxfordshire OX11 0FA, UK.
³ College of Science, Health, Engineering and Education, Murdoch University, Murdoch, Western Australia 6150, Australia.

PMID: 32909021
DOI: 10.1039/d0cc04036c

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.