Nitrogen doped graphene oxide modified WSe<inf>2</inf>nanorods for visible light photocatalysis
关键字：Selenium compounds;Aromatic compounds - Complexation - Doping (additives) - Graphene - Graphene oxide - High resolution transmission electron microscopy - Hydrothermal synthesis - Irradiation - Light - Nanorods - Photocatalysis - Photocatalysts - Photodegradation - Rate constants - Reusability - Scanning electron microscopy - Solutions - Spectrometers - Transmission electron microscopy;Diffuse reflectance spectroscopy - Energy dispersive spectrometers - Methylene Blue - Photo catalytic degradation - Photocatalytic activities - Visible-light irradiation - Visible-light photocatalysis - WSe2
摘要：Nitrogen doped graphene oxide (NG) modified WSe<inf>2</inf>nanorod composites (WSe<inf>2</inf>/NG) were prepared by a hydrothermal synthesis route. The synthesized samples were characterized by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), transmission electron microscopy (TEM), UV–vis diffuse reflectance spectroscopy(DRS) and elemental analysis. Using methylene blue (MB) as a target organic dye, WSe<inf>2</inf>/NG nanocomposites exhibited significant enhancement in photocatalytic degradation of MB under visible light irradiation compared with WSe<inf>2</inf>. That was mainly attributed to the strong adsorption of MB, excellent electrical conductivity and charge separation features of the NG, leading to effectively restrained electron-hole pair recombination of WSe<inf>2</inf>nanorods. Among the hybrid photocatalysts, WSe<inf>2</inf>/50NG (50 wt% of NG) exhibited the highest photocatalytic activity with a rate constant of 0.0572 min<sup>−1</sup>for the degradation of the MB in aqueous solution under visible light irradiation, and the removal efficiency reached 99.3% which was 2.4 times higher than that of WSe<inf>2</inf>. In addition, WSe<inf>2</inf>/NG also showed higher stability and good reusability.<br/> © 2018 Elsevier B.V.
卷号：750
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