Skip to main content
placeholder image

A 1D/2D WO3nanostructure coupled with a nanoparticulate CuO cocatalyst for enhancing solar-driven CO2photoreduction: The impact of the crystal facet

Journal Article


Abstract


  • Photocatalytic reduction of CO2into solar fuels is regarded as one of the most promising approaches to address the issues of global warming and the energy crisis. The promotion of spatial charge separation and transfer through crystal facet engineering could be conducive to improved photocatalytic activity. In this study, one-dimensional (1D) WO3nanowires with a {110} dominant facet (WO3-110) and two-dimensional (2D) WO3nanosheets with a {001} dominant facet (WO3-001) coupled with CuO nanoparticles are fabricated by a facile method and used for CO2photoreduction. Its composition and structural characterizations suggest that the WO3-CuO hybrid features good contact between the WO3and CuO nanostructures. Under light irradiation, the WO3and WO3-CuO nanostructures are able to photoreduce CO2into CH4. Notably, the prepared WO3-CuO nanohybrids with different exposed facets show improved CO2reduction capability compared to pure WO3and CuO. The heterojunction interface between the WO3photocatalyst and the CuO cocatalyst through p-n contact can facilitate electron-hole pair separation and accordingly results in enhanced photocatalytic performance. With the assistance of the CuO cocatalyst, the {110} facet WO3-CuO hybrid displays superior photoreduction capability compared to the {001} facet WO3-CuO, which is attributed to the difference in the crystal facets in the heterostructure. The {110} facet WO3nanowires have a more negative conduction band edge, contributing to the higher reduction capacity of this sample. On the other hand, it is shown that faster charge carrier transfer efficiency would enable more photoinduced electrons to participate in CO2photoreduction, especially with the involvement of the nanoparticulate CuO cocatalyst. This work provides guidance for designing a hetero-photocatalyst-cocatalyst system through crystal facet engineering.

Publication Date


  • 2020

Citation


  • Zhang, M., Zhao, K., Xiong, J., Wei, Y., Han, C., Li, W., & Cheng, G. (2020). A 1D/2D WO3nanostructure coupled with a nanoparticulate CuO cocatalyst for enhancing solar-driven CO2photoreduction: The impact of the crystal facet. Sustainable Energy and Fuels, 4(5), 2593-2603. doi:10.1039/d0se00034e

Scopus Eid


  • 2-s2.0-85084564650

Start Page


  • 2593

End Page


  • 2603

Volume


  • 4

Issue


  • 5

Abstract


  • Photocatalytic reduction of CO2into solar fuels is regarded as one of the most promising approaches to address the issues of global warming and the energy crisis. The promotion of spatial charge separation and transfer through crystal facet engineering could be conducive to improved photocatalytic activity. In this study, one-dimensional (1D) WO3nanowires with a {110} dominant facet (WO3-110) and two-dimensional (2D) WO3nanosheets with a {001} dominant facet (WO3-001) coupled with CuO nanoparticles are fabricated by a facile method and used for CO2photoreduction. Its composition and structural characterizations suggest that the WO3-CuO hybrid features good contact between the WO3and CuO nanostructures. Under light irradiation, the WO3and WO3-CuO nanostructures are able to photoreduce CO2into CH4. Notably, the prepared WO3-CuO nanohybrids with different exposed facets show improved CO2reduction capability compared to pure WO3and CuO. The heterojunction interface between the WO3photocatalyst and the CuO cocatalyst through p-n contact can facilitate electron-hole pair separation and accordingly results in enhanced photocatalytic performance. With the assistance of the CuO cocatalyst, the {110} facet WO3-CuO hybrid displays superior photoreduction capability compared to the {001} facet WO3-CuO, which is attributed to the difference in the crystal facets in the heterostructure. The {110} facet WO3nanowires have a more negative conduction band edge, contributing to the higher reduction capacity of this sample. On the other hand, it is shown that faster charge carrier transfer efficiency would enable more photoinduced electrons to participate in CO2photoreduction, especially with the involvement of the nanoparticulate CuO cocatalyst. This work provides guidance for designing a hetero-photocatalyst-cocatalyst system through crystal facet engineering.

Publication Date


  • 2020

Citation


  • Zhang, M., Zhao, K., Xiong, J., Wei, Y., Han, C., Li, W., & Cheng, G. (2020). A 1D/2D WO3nanostructure coupled with a nanoparticulate CuO cocatalyst for enhancing solar-driven CO2photoreduction: The impact of the crystal facet. Sustainable Energy and Fuels, 4(5), 2593-2603. doi:10.1039/d0se00034e

Scopus Eid


  • 2-s2.0-85084564650

Start Page


  • 2593

End Page


  • 2603

Volume


  • 4

Issue


  • 5