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Neodymium-doped Zn-Al layered double hydroxide (Nd/Zn-AlLDH) with excellent photocatalytic activityis prepared by aone-step hydrothermalmethod. The morphology and physicochemical properties ofas-synthesized photocatalystswere wellanalyzed bythe following techniques,(FT-IR),(XRD),(SEM), (TEM), photoluminescence (PL), UV-diffuse reflectance spectroscopy (UV-DRS), and BET surface analysis. Doping of Zn-Al LDH with Nd3+enhances the overall catalytic activity of the nanocomposite, like better electron-hole pair separation, increase in interplanar distance, fast electron transfer, and large surface area. The as-prepared nanocomposite showsexcellent degradation of three different dyes under visible light irradiation.The degradation efficiency of these dyes follows the order CongoRed>Rose Bengal> Fast Green, respectively.Furthermore, liquid chromatography-mass spectrometry (LC-MS) is employed to propose a possible photocatalytic degradation pathway forCongo Red and Rose Bengal dyesbyNd/Zn-Al LDH. With the help of radical trapping experiments, it has been revealed that during the photoexcitation process, the primary reactive intermediates are hydroxyl radicals. |
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