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Preparation of W18O49/g-C3N4 heterojunction catalyst with full-spectrum-driven photocatalytic N2 photofixation ability from UV to near infrared region

Abstract

As we all know, more than half of the solar spectrum is near infrared (NIR) light. However, the NIR light is seldom utilized in photocatalytic reaction. In this work, W18O49/g-C3N4 heterojunction catalyst is prepared and used for full-spectrum-driven N2 photofixation from UV to NIR region for the first time. X-ray diffraction, N2 adsorption, UV-Vis-NIR spectroscopy, Scanning electron microscope, Transmission electron microscopy, Photoluminescence, X-ray photoelectron spectroscopy and Electrochemical impedance spectra were used to characterize the prepared catalysts. The result indicates that as-prepared W18O49/g-C3N4 heterojunction catalysts display much higher N2 photofixation performance than that of individual W18O49 or g-C3N4, which should be due to the improved separation rate of electron-hole pairs. g-C3N4 is the active component in the catalyst for N2 photofixation. W18O49 plays a role as light absorber in the full-spectrum to form more photogenerated electrons for recombining the holes in the g-C3N4 through “Z-scheme” mechanism. The possible electrons transfer route is proposed.

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Publication details

The article was received on 26 May 2017, accepted on 10 Jul 2017 and first published on 11 Jul 2017


Article type: Paper
DOI: 10.1039/C7NJ01848G
Citation: New J. Chem., 2017, Accepted Manuscript
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    Preparation of W18O49/g-C3N4 heterojunction catalyst with full-spectrum-driven photocatalytic N2 photofixation ability from UV to near infrared region

    S. Hu, H. Liang and H. zou, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ01848G

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