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Preparation, characterization and photocatalytic properties of CdS nanoparticles dotted on the surface of carbon nanotubes

机译：碳纳米管表面点缀的CdS纳米粒子的制备，表征及光催化性能

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Cadmium sulfide (CdS) nanoparticles dotted on the surface of multiwalled carbon nanotubes (MWCNTs) have been synthesized by the polyol method. The as-prepared materials were characterized by x-ray powder diffraction, transmission electron microscopy, scanning electron microscopy, and Brunauer-Emmett-Teller adsorption analysis. The results indicate that CdS nanoparticles with diameter of 5-8 nm are thickly and uniformly coated on the surface of the MWCNTs. The photodegradation of azo dye using these materials was evaluated by the degradation of Brilliant Red X-3B under visible light. The coated nanotubes show higher photocatalytic activity than both CdS alone and a CdS/activated carbon sample; in addition, there is an optimum content of MWCNTs. The presence of MWCNTs can also hamper the photocorrosion of CdS. The mechanism for the enhancement of MWCNTs on the adsorption and photocatalytic property of CdS is investigated for the first time.
机译：通过多元醇法合成了点缀在多壁碳纳米管（MWCNT）表面的硫化镉（CdS）纳米颗粒。通过X射线粉末衍射，透射电子显微镜，扫描电子显微镜和Brunauer-Emmett-Teller吸附分析来表征所制备的材料。结果表明，直径为5-8 nm的CdS纳米颗粒被厚而均匀地涂覆在MWCNT的表面上。使用这些材料对偶氮染料的光降解作用是通过在可见光下降解艳红X-3B来评估的。涂覆的纳米管显示出比单独的CdS和CdS /活性炭样品更高的光催化活性。另外，MWCNT的含量最佳。 MWCNT的存在也可以阻碍CdS的光腐蚀。首次研究了增强碳纳米管对CdS的吸附和光催化性能的机理。

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