Synthesis of AuPdNi Powders Using an Environmentally Friendly Ultrasound Assisted Extraction for Obtaining Boric Acid from Colemanite: Optimization by Response Surface Methodology

Abstract

In this study, simple ultrasonic assisted extraction was proposed as the environmental method at all stages of catalyst synthesis.A homogeneous catalyst was synthesized from high grade monodisperse gold-palladium-nickel nanoparticles using ultrasonic assisted extraction method (UAE) instead of conventional methods to obtain boric acid from colemanite.The most important advantage of this method is that AuPdNi nanoparticles can be easily separated and used repeatedly for further studies. Because of this feature, increasing amount of boric acid obtained from colemanite using AuPdNi nanocatalyst was investigated.For the test parameters, solvent/solids ratio, pH, extraction time and extraction temperature were used for extraction. Responsive Surface Methodology (RSM) method was used to determine optimum conditions. In this study, it was determined that presence of AuPdNinanocatalyst significantly increased boric acid activity. Transmission electron microscopy (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analyses were performed for the characterization of nanomaterials. According to the results of the RSM test program, boric acid yield was found to be 95.73% with the aid of AuPdNi nanocatalyst.

Keywords

• colemanite
• ultrasound-assistedextraction
• central composite design
• optimization
• aupdni nanocatalyst
• kolemanit
• ultrason destekli ekstraksiyon
• merkezi kompozit tasarım
• optimizasyon
• aupdni nanokatalizör