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

Year 2020, , 1173 - 1184, 31.01.2020

Bahdişen Gezer

https://doi.org/10.29130/dubited.630708

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

Çevre Dostu Ultrasonik Destekli Ekstraksiyon kullanılarak AuPdNi Tozlarının Sentezi ve Kolemanit’ten Borik Asit Elde Edilmesi: Tepki Yüzey Metodolojisi İle Optimizasyonu

Abstract

Bu çalışmada, katalizör sentezinin tüm aşamalarında çevresel yöntem olarak basit ultrasonik destekli ekstraksiyon önerildi.Kolemanitten borik asit elde etmek için geleneksel yöntemler yerine ultrasonik destekli ekstraksiyon yöntemi (UAE) kullanılarak, yüksek dereceli monodispers altın-paladyum-nikel nanoparçacıklarından homojen bir katalizör sentezlendi. Bu yöntemin en önemli avantajı, AuPdNi nanopartiküllerinin kolayca ayrılabilmesi ve ileriki çalışmalar için tekrar tekrar kullanılmasıdır. Bu özellik nedeniyle AuPdNi nanokatalizörü kullanılarak kolemanitten borik asit elde etme miktarının artması incelenmiştir. Ekstraksiyon için çözücü/katı madde oranı, pH, ekstraksiyon süresi ve ekstraksiyon sıcaklığı kullanılmıştır. Optimum koşulları belirlemek için Duyarlı Yüzey Metodolojisi (RSM) yöntemi kullanılmıştır. Çalışmada, AuPdNi nanokatalizör varlığının borik asit aktivitesini anlamlı şekilde arttırdığı tespit edildi. Nanomalzemelerin karakterizasyonu için transmisyon elektron mikroskopisi (TEM), X-ışını kırınımı (XRD) ve Fourier dönüşümü kızılötesi spektroskopisi (FTIR) analizleri yapıldı. RSM test programının sonuçlarına göre, AuPdNi nanokatalizör yardımı ile borik asit verimi % 95.73 olarak bulundu.

Keywords

Kolemanit, Ultrason destekli ekstraksiyon, Merkezi kompozit tasarım, Optimizasyon, AuPdNi nanokatalizör

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