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采用微波辐射法制备埃洛石纳米管(HNTs)负载CeO_2-CdS复合材料CeO_2-CdS/HNTs。用X射线衍射、透射电子显微镜、紫外-可见漫反射光谱、Fourier变换红外光谱等对CeO_2-CdS/HNTs样品结构和形貌进行表征,考察了可见光下降解亚甲基蓝的光催化活性,讨论了CeO_2/CdS摩尔比对光催化剂活性的影响。结果表明:纳米颗粒CeO_2、CdS以紧密结合的形式牢固的负载在HNTs表面,二者具有协同催化作用。当CeO_2/CdS摩尔比为3:7时,80 min内亚甲基蓝的降解率可达95%。
Preparation of CeO_2-CdS / HNTs loaded with halloysite nanotubes (HNTs) by microwave irradiation. The structure and morphology of CeO_2-CdS / HNTs samples were characterized by X-ray diffraction, transmission electron microscopy, UV-Vis diffuse reflectance spectroscopy and Fourier transform infrared spectroscopy. The photocatalytic activity of methylene blue was investigated under visible light irradiation. The effects of CeO_2 / Effect of CdS Molar Ratio on Photocatalytic Activity. The results show that the CeO_2 and CdS nanoparticles are firmly supported on the surface of HNTs in close cohesion, and the two have synergistic catalysis. When the CeO_2 / CdS molar ratio is 3: 7, the degradation rate of methylene blue can reach 95% within 80 min.