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Issue 3, 2015
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Band gap-tunable potassium doped graphitic carbon nitride with enhanced mineralization ability

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Abstract

Band gap-tunable potassium doped graphitic carbon nitride with enhanced mineralization ability was prepared using dicyandiamide monomer and potassium hydrate as precursors. X-ray diffraction (XRD), N2 adsorption, UV-Vis spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), photoluminescence (PL) and X-ray photoelectron spectroscopy (XPS) were used to characterize the prepared catalysts. The CB and VB potentials of graphitic carbon nitride could be tuned from −1.09 and +1.56 eV to −0.31 and +2.21 eV by controlling the K concentration. Besides, the addition of potassium inhibited the crystal growth of graphitic carbon nitride, enhanced the surface area and increased the separation rate for photogenerated electrons and holes. The visible-light-driven Rhodamine B (RhB) photodegradation and mineralization performances were significantly improved after potassium doping. A possible influence mechanism of the potassium concentration on the photocatalytic performance was proposed.

Graphical abstract: Band gap-tunable potassium doped graphitic carbon nitride with enhanced mineralization ability

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The article was received on 02 Sep 2014, accepted on 04 Nov 2014 and first published on 06 Nov 2014


Article type: Paper
DOI: 10.1039/C4DT02658F
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Dalton Trans., 2015,44, 1084-1092

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    Band gap-tunable potassium doped graphitic carbon nitride with enhanced mineralization ability

    S. Hu, F. Li, Z. Fan, F. Wang, Y. Zhao and Z. Lv, Dalton Trans., 2015, 44, 1084
    DOI: 10.1039/C4DT02658F

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