Article

Catalysis Letters

, Volume 141, Issue 4, pp 525-530

Photoreduction of Carbon Dioxide Over NaNbO3 Nanostructured Photocatalysts

  • Haifeng ShiAffiliated withSchool of Science, Jiangnan UniversityDepartment of Physics, Eco-Materials and Renewable Energy Research Center (ERERC), Nanjing UniversityPhotocatalytic Materials Center (PCMC), National Institute for Materials Science (NIMS) 1-2-1 Email author 
  • , Tingzhi WangAffiliated withSchool of Science, Jiangnan University
  • , Jian ChenAffiliated withSchool of Science, Jiangnan University
  • , Chun ZhuAffiliated withSchool of Science, Jiangnan University
  • , Jinhua YeAffiliated withPhotocatalytic Materials Center (PCMC), National Institute for Materials Science (NIMS) 1-2-1
  • , Zhigang ZouAffiliated withDepartment of Physics, Eco-Materials and Renewable Energy Research Center (ERERC), Nanjing University

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Abstract

NaNbO3 had been successfully developed as a new photocatalyst for CO2 reduction. The catalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and ultraviolet–visible spectroscopy (UV–Vis). The DFT calculations revealed that the top of VB consisted of the hybridized O 2p orbital, while the bottom of CB was constructed by Nb 3d orbital, respectively. In addition, the photocatalytic activities of the NaNbO3 samples for reduction of CO2 into methanol under UV light irradiation were investigated systematically. Compared with the bulk NaNbO3 prepared by a solid state reaction method, the present NaNbO3 nanowires exhibited a much higher photocatalytic activity for CH4 production. This is the first example that CO2 conversion into CH4 proceeded on the semiconductor nanowire photocatalyst.

Graphical Abstract

NaNbO3 had been successfully developed as a new photocatalyst for CO2 reduction. It was noted that NaNbO3 nanowires showed a much higher activity for CH4 production compared with bulk counterpart (SSR NNO).
http://static-content.springer.com/image/art%3A10.1007%2Fs10562-010-0482-1/MediaObjects/10562_2010_482_Figa_HTML.gif

Keywords

NaNbO3 Photocatalytic CO2 reduction Nanowires