Mavuso, MAMakgwane, Peter RRay, Suprakas S2020-07-132020-07-132020-04Mavuso, M.A., Makgwane, P.R. and Ray, S.S. 2020. Heterostructured CeO2-M (M = Co, Cu, Mn, Fe, Ni) oxide nanocatalysts for the visible-light photooxidation of pinene to aroma oxygenates. ACS Omega, v5(17), 9775-9788.2470-1343https://pubs.acs.org/doi/10.1021/acsomega.9b04396?goto=supporting-info&https://dx.doi.org/10.1021/acsomega.9b04396http://hdl.handle.net/10204/11470Copyright: 2020 American Chemical Society. This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.Herein, we report the enhanced photocatalytic activity of heterostructured CeO2 nanocatalysts interfaced with Cu, Co, Ni, Mn, and Fe metal oxides. The CeO2 catalysts exhibited an enhanced red shift in the visible-light response compared to CeO2. This improved absorption range effectively suppressed electron (e-)/hole (+h) recombination by forming localized energy bands associated with defect oxygen vacancies (Vo) induced by the Mn+ ions incorporated in CeO2. Under visible-light irradiation, CeO2 catalysts are active for a-pinene oxidation to the aroma oxygenates, pinene oxide, verbenol, and verbenone. Both Fe2O3-CeO2 and NiO- CeO2 gave the highest pinene conversions of 71.3 and 53.1%, respectively, with corresponding pinene oxide selectivities of 57.3 and 58.2%. The enhanced photocatalytic performance of the heterostructured CeO2 catalysts compared to CeO2 is attributed to their enhanced visible-light absorption range and efficient suppression of e-/+h recombination. The Fe2O3- CeO2 catalyst was highly recyclable and did not show any significant loss of its photoactivity.enCeO2Biomass-derived terpene compoundsPhotocatalysisArticleMavuso, M., Makgwane, P. R., & Ray, S. S. (2020). Heterostructured CeO2-M (M = Co, Cu, Mn, Fe, Ni) oxide nanocatalysts for the visible-light photooxidation of pinene to aroma oxygenates. http://hdl.handle.net/10204/11470Mavuso, MA, Peter R Makgwane, and Suprakas S Ray "Heterostructured CeO2-M (M = Co, Cu, Mn, Fe, Ni) oxide nanocatalysts for the visible-light photooxidation of pinene to aroma oxygenates." (2020) http://hdl.handle.net/10204/11470Mavuso M, Makgwane PR, Ray SS. Heterostructured CeO2-M (M = Co, Cu, Mn, Fe, Ni) oxide nanocatalysts for the visible-light photooxidation of pinene to aroma oxygenates. 2020; http://hdl.handle.net/10204/11470.TY - Article AU - Mavuso, MA AU - Makgwane, Peter R AU - Ray, Suprakas S AB - Herein, we report the enhanced photocatalytic activity of heterostructured CeO2 nanocatalysts interfaced with Cu, Co, Ni, Mn, and Fe metal oxides. The CeO2 catalysts exhibited an enhanced red shift in the visible-light response compared to CeO2. This improved absorption range effectively suppressed electron (e-)/hole (+h) recombination by forming localized energy bands associated with defect oxygen vacancies (Vo) induced by the Mn+ ions incorporated in CeO2. Under visible-light irradiation, CeO2 catalysts are active for a-pinene oxidation to the aroma oxygenates, pinene oxide, verbenol, and verbenone. Both Fe2O3-CeO2 and NiO- CeO2 gave the highest pinene conversions of 71.3 and 53.1%, respectively, with corresponding pinene oxide selectivities of 57.3 and 58.2%. The enhanced photocatalytic performance of the heterostructured CeO2 catalysts compared to CeO2 is attributed to their enhanced visible-light absorption range and efficient suppression of e-/+h recombination. The Fe2O3- CeO2 catalyst was highly recyclable and did not show any significant loss of its photoactivity. DA - 2020-04 DB - ResearchSpace DP - CSIR KW - CeO2 KW - Biomass-derived terpene compounds KW - Photocatalysis LK - https://researchspace.csir.co.za PY - 2020 SM - 2470-1343 T1 - Heterostructured CeO2-M (M = Co, Cu, Mn, Fe, Ni) oxide nanocatalysts for the visible-light photooxidation of pinene to aroma oxygenates TI - Heterostructured CeO2-M (M = Co, Cu, Mn, Fe, Ni) oxide nanocatalysts for the visible-light photooxidation of pinene to aroma oxygenates UR - http://hdl.handle.net/10204/11470 ER -