University of Kashan Journal of Nanostructures 2251-7871 9 2 2019 04 01 A green approach to the facile synthesis of colloidal platinum nanoparticles by Preyssler polyoxometalate 249 257 88807 10.22052/JNS.2019.02.007 EN Mohamad Reza Afifeh Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran Ali Ahmadpour Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran Mohammad Taghi Hamed Mosavian Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran. Ali Ayati Department of Chemical Engineering, Quchan University of Technology, Quchan, Iran Fatemeh F. Bamoharram Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran Fatemeh Ahmadi Hekmatikar Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran. Journal Article 2017 09 25 In the present study, platinum nanoparticles were synthesized through an effective, facile and green method using H14[NaP5W30O110], a Preyssler-structured polyoxometalate, under UV light irradiation. Preyssler plays the roles of photocatalyst, reducing agent and stabilizer in the synthesis of Pt nanoparticles. The effect of different parameters, i.e. time, propan-2-ol volume, pH, molar ratio of Preyssler to Pt ions ([Preyssler]/[Pt4+]) and temperature on the size of prepared nanoparticles were investigated. Under different conditions, platinum nanoparticles with minimum size of 13 nm were ultimately obtained. The nanoparticles were characterized by UV/Vis spectroscopy, particle size distribution, transmission electron microscopy and electron diffraction techniques. The results showed that the photocatalytic behavior of Preyssler was a propulsion factor in reducing the Pt4+ ions. The resultant NPs are covered with a Preyssler layer which contributes to the stabilization of NPs. It was shown that the subsequent increasing of NP size can be on account of partly increasing rate of NP growth compared to nucleation. Moreover, the stability of obtained nanoparticles was inspected. https://jns.kashanu.ac.ir/article_88807_5ddd0ccf877396b79b8932b877ced306.pdf