Synthesis by using ultrasound and characterization of cesium salt of 12-tungstophosporic acid as nano catalyst

At the present time, green chemistry and nano-catalysis are the most important areas of research. In this study, the cesium salt of 12-tungstophosphoric acid (Cs-TPA) which is a green catalysis was synthesized as nano catalyst and characterized. Catalysts were synthesized by using ultrasound which was one of nano materials synthesis methods. The characteristic of synthesized nano Cs-TPA catalysts were obtained by FT-IR spectroscopy, FT-IR spectroscopy of pyridine adsorption, X-ray diffraction (XRD), thermal gravimetric analysis (TG), scanning electron microscope (SEM), BET and XRF analysis. It is seen that acidic cesium salts have been maintained their structure while cesium salts were synthesized in nano-size. Particle sizes of synthesized Cs-TPA catalyst at the different ultrasound times and amplitudes were calculated from BET surface area and it was seen that Cs-TPAs were synthesized in nano-size. Effects of ultrasound time and amplitude on nano-size were not linear. Acidic cesium salts at 20%, 40% and 60% loading were synthesized using SBA-15 as support material and characterized. It is seen that Cs-TPA was hold on to SBA-15. At high loading percentage (60%), structure of SBA-15 has been deformed. Keywords: Cesium salt of 12-tungstophosporic acid, Nano catalysis, Ultrasound, Characterization