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

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Abstract

As we all know, more than half of the solar spectrum is near infrared (NIR) light. However, NIR light is seldom utilized in photocatalytic reactions. In this work, the W18O49/g-C3N4 heterojunction catalyst is prepared and used for full-spectrum-driven N2 photofixation from the UV to the NIR region for the first time. X-ray diffraction, N2 adsorption, UV-Vis-NIR spectroscopy, scanning electron microscopy, transmission electron microscopy, photoluminescence, X-ray photoelectron spectroscopy and electrochemical impedance spectra were used to characterize the prepared catalysts. The result indicates that the as-prepared W18O49/g-C3N4 heterojunction catalysts display much higher N2 photofixation performance than 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 the role of a light absorber in the full-spectrum to form more photogenerated electrons for recombining the holes in g-C3N4 through the “Z-scheme” mechanism. A possible electron transfer route is proposed.

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

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

    H. Liang, H. Zou and S. Hu, New J. Chem., 2017, Advance Article , DOI: 10.1039/C7NJ01848G

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