Ion exchange synthesis of Ag+ incorporated LiAlO2 and its application in photodegradation of organic dyes
Ravi Gundeboina, Vithal Muga
SN Applied Sciences
The present work aimed at the synthesis, characterization and photodegradation studies of visible light active silver ion (Ag+) incorporated LiAlO2 catalyst. Ethylene glycol assisted sol–gel method was adopted to prepare LiAlO2 at 700 °C. AgAlO2 was synthesized by cation exchange of LiAlO2 by the solid-state method at 300 °C. The structural and optical properties were characterized by powder X-ray diffraction and UV–Vis diffuse reflectance spectroscopy respectively. The scanning electron microscopy (SEM) provided the morphological information of as-prepared samples. LiAlO2 and AgAlO2 were crystallized in a tetragonal lattice (space group P412121) and orthorhombic (space group Pna21) respectively. The bandgap energy of the samples was determined by the Kubelka–Munk (KM) plot. SEM measurements revealed the flower-like hierarchical shape particles. The photocatalytic properties of these samples were evaluated by the degradation of methylene blue and rhodamine B dyes. The mechanistic degradation pathway of RhB was studied using radical quenchers. The rate of recombination of the charge carriers during photocatalysis was discussed.
Diffuse reflectance, Quantitation, Band gap, Semiconductor, Materials, Fluorescence, Photoluminescence