Preparation and visible light catalytic performance of N-doped C coated NaTaO<sub>3</sub> composites

HU Haixia; FU Yaqin

doi:10.13801/j.cnki.fhclxb.20191204.001

HU Haixia, FU Yaqin. Preparation and visible light catalytic performance of N-doped C coated NaTaO3 composites[J]. Acta Materiae Compositae Sinica, 2020, 37(6): 1251-1259. DOI: 10.13801/j.cnki.fhclxb.20191204.001

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Preparation and visible light catalytic performance of N-doped C coated NaTaO₃ composites

HU Haixia,
FU Yaqin

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Abstract

The N-doped C coated NaTaO₃ composite was prepared through sol-gel method by using tantalic chloride (TaCl₅) and sodium acetate as raw materials, melamine as N sources, cetyl trimethyl ammonium bromide (CTAB) and polyvinylpyrrolidone (PVP) as surfactant. The synthesized sample was characterized in detail by XRD, TEM, XPS and UV-Vis DRS. The dye rhodamine B (RhB) was used as a model contaminant to evaluate the adsorption and photocatalytic activity of N-doped carbon coated NaTaO₃. The results indicate that CTAB and PVP form ultra-thin carbon film around NaTaO₃, which not only limits the growth of NaTaO₃ particles, but also improves the adsorbability to target pollutants. The composites with tripolynitrile amines to TaCl₅ molar ratio n=1.5 have the best visible light catalytic performance and the removal ratio of RhB achieves 96.46% under dark adsorption for 80 min and irradiation for 8 h. The photodegradation of RhB is in accordance with the pseudo first order reduction kinetics model.

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Preparation and visible light catalytic performance of N-doped C coated NaTaO3 composites

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Preparation and visible light catalytic performance of N-doped C coated NaTaO₃ composites