Department of Chemistry, Bharathiar University, Coimbatore, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2011 May;78(5):1592-8. doi: 10.1016/j.saa.2011.02.008. Epub 2011 Feb 13.
A novel method to prepare cadmium sulphide nanoparticles (CdS NPs) possessing nearly uniform size was adopted using eggshell membrane (ESM), under different pH conditions. Significant yield of CdS NPs with smallest possible size was obtained by increasing the pH of the reaction medium from acidic to alkaline. The above prepared CdS NPs have been characterized by UV-vis absorption as well as emission spectra, powder X-ray diffraction, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The efficiency of the above prepared CdS NPs as a catalyst for the photodegradation of toluidine blue (TB) dye, as a function of pH as well as the ratio between the catalyst and the substrate was studied after irradiation with UV light. The results showed that an efficient interaction took place between the catalyst and the substrate to cause degradation of the selected dye. A maximum degradation of toluidine blue dye (90%) was observed at pH 8 which is higher than that of the efficiencies at pH 4 and pH 6.
采用一种新方法，使用鸡蛋壳膜（ESM）在不同 pH 条件下制备具有几乎均匀尺寸的硫化镉纳米粒子（CdS NPs）。通过将反应介质的 pH 值从酸性增加到碱性，可获得具有最小尺寸的 CdS NPs 的大量产率。通过紫外-可见吸收和发射光谱、粉末 X 射线衍射、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对上述制备的 CdS NPs 进行了表征。研究了在紫外光照射下，作为光降解甲苯胺蓝（TB）染料的催化剂的上述制备的 CdS NPs 的效率，作为 pH 以及催化剂与底物之间的比例的函数。结果表明，催化剂和底物之间发生了有效的相互作用，导致所选染料的降解。在 pH 8 时观察到甲苯胺蓝染料的最大降解（90%），高于在 pH 4 和 pH 6 时的效率。
