Cadmium oxide (CdO) nanoparticles were synthesized successfully by use of the sol-gel reaction route using ethanol, in order to study their structural, optical, morphological and photocatalytic properties. A variety of techniques were used to characterize the CdO nanoparticles,including, XRD, UV–visible absorption spectroscopy,Scanning Electron Microscope (SEM) with energy dispersive X-ray Analysis (EDAX) and transmission electron microscopy (TEM). The resultant CdO nanoparticles were tested as a photocatalyst for the degradation of methyl orange (MO) under visible light.The results show that cadmium oxide nanoparticles were synthesized using a single phase through sol- gel method, with a crystal structure corresponding to a cubic system as confirmed by the XRD pattern. The surface morphology and chemical composition of the nanoparticles revealed a spherical morphology which lacked impurities. The band gap of the samples was calculated using the Tauc relationship; the energy band gap (Eg) was seen to increase with particle-size reduction. Photocatalytic degradation of methyl orange (MO) dye was tested under visible light exposure, with the best results being seen within 45 min; we conclude therefore that cadmium oxide nanoparticles are more effective photocatalysts at this nanoscale when synthesized by sol- gel method.

通过使用乙醇的溶胶-凝胶反应路线成功合成了氧化镉 (CdO) 纳米颗粒，以研究其结构、光学、形态和光催化性能。使用多种技术来表征 CdO 纳米颗粒，包括 XRD、紫外-可见吸收光谱、扫描电子显微镜 (SEM) 与能量色散 X 射线分析 (EDAX) 和透射电子显微镜 (TEM)。测试所得的 CdO 纳米粒子作为光催化剂在可见光下降解甲基橙 (MO)。 结果表明，氧化镉纳米粒子是通过溶胶凝胶法合成的，其晶体结构对应于立方晶系由XRD图证实。纳米颗粒的表面形态和化学成分显示出缺乏杂质的球形形态。样品的带隙使用 Tauc 关系计算；可以看到能带隙 (Eg) 随着粒径的减小而增加。在可见光下测试了甲基橙（MO）染料的光催化降解，在45分钟内观察到最好的结果；因此，我们得出结论，当通过溶胶-凝胶法合成时，氧化镉纳米颗粒在该纳米尺度上是更有效的光催化剂。在 45 分钟内看到最好的结果；因此，我们得出结论，当通过溶胶-凝胶法合成时，氧化镉纳米颗粒在该纳米尺度上是更有效的光催化剂。在 45 分钟内看到最好的结果；因此，我们得出结论，当通过溶胶-凝胶法合成时，氧化镉纳米颗粒在该纳米尺度上是更有效的光催化剂。