Synthesis of Silver Phosphate / Lanthanum Phosphate Composites for photocatalytic applications

Abstract

This research reports the successful synthesis pure silver phosphate in traditional solution containing different content of pH, time, and calcine temperature. By initially different solution, pure silver phosphate was adjusted pH from 4.0-12.0 and silver phosphate/lanthanum phosphate composite was adjusted calcine temperature at 0-300 degreecelsius. Subsequently, the solutions were processed by 270-W microwave hydrothermal method at 30-60 min. The as-synthesized produced were characterize studied the crystallinity, structure, morphologies, surface area, optical properties by X ray diffraction, electron microscopy and spectroscopy, and photocatalytic properties by degradation of RhB, MO and MB. In this research was divided into 3 parts, (1) studied the effect of lengths of time in synthesized pure silver phosphate (2) studied the effect of pH value in initial solution by synthesized pure silver phosphate (3) studied the effect of calcine temperature on shape, crystallinity, and optical properties. In these results (1-3), particles were growth with an increase in synthesis time but did not affect to the ability degradation of dyes. Nevertheless, particle size and crystallinity were decrease as followed by increasing in the pH value and XPS analysis were detected silver pyrophosphate (Ag4P2O7) at surface area which has effect to the energy band gap and photocatalytic performance. In addition, the pure silver phosphate was successfully synthesized from different pH value in useful the photocatalytic performance and showed highest photodegradation efficiency at pH 10. As calcine temperature increases were resulting in high energy band gap, while agglomerate particles on surface area and crystallinity were decrease which make it an ability of composite photocatalysts.