Synthesis of CaxCu3-xTi4O12 Perovskite Materials and House-Hold LED Light Mediated Degradation of Rhodamine Blue Dye

• Published in: Journal of inorganic and organometallic polymers and materials 2021-05, Vol.31 (5), p.2161-2167
• Main Authors: Saikia, Priyankamoni, Sarmah, Hemanga Jyoti, Ahmed, Shahnaz, Lahkar, Suman, Das, Jyoti Prakash, Dolui, Swapan Kumar
• Format: Article
• Language: English
• Subjects: Calcium ions; Catalytic activity; Chemistry; Chemistry and Materials Science; Comparative studies; Composition; Copper; Dyes; Energy gap; Inorganic Chemistry; Light emitting diodes; Organic Chemistry; Performance degradation; Perovskites; Photocatalysis; Photocatalysts; Photodegradation; Photoluminescence; Polymer Sciences; Rate constants; Rhodamine; Spectrum analysis
• ISSN: 1574-1443; 1574-1451
• DOI: 10.1007/s10904-021-01929-y

This report describes a comparative study of dye degradation under 20-W LED light using the perovskite photocatalyst Calcium Copper Titanate (CCTO) and its compositions (Ca x Cu 3-x Ti 4 O 12 ) (x = 1, 1.5 and 2), synthesized by changing molar ratios of Ca 2+ and Cu 2+ ions. The 99.74% degradation of Rhodamine Blue (RhB) with composition (x = 1) within 6 h is reflected its better photocatalytic activity than the parent CCTO and other compositions. The band gap energy of the materials 2.18 eV (CCTO), 1.93 eV (x = 1), 2.40 eV (x = 1.5), and 2.55 eV (x = 2) are analysed with UV–Vis spectroscopy. The presences of Ca, Cu, Ti and O in the synthesized photocatalysts are confirmed with Elemental X-ray Dispersive (EDX) analysis. The cubic phases in the polyhedral shape of the materials are detected in X-ray diffraction and Scanning Electron Microscopy (SEM). This report further observes the defect density concentrations of the materials with Photoluminescence Spectroscopy (PL) and provides the approximate explanation of their dye degradation performance as photocatalysts. The rate constants are found in a first order reaction trend; where the composition (x = 1) shows about 1.683 × 10 –2  min −1 . The mechanistic understanding of the degradation process is also revisited and rationalized with different scavengers for the process.