University of Kashan Journal of Nanostructures 2251-7871 10 4 2020 10 01 A facile synthesis and characterization of surfactant (CTAB/TSC/TX-100) assisted Ir-Sn bimetallic nanoparticles 846 862 111310 10.22052/JNS.2020.04.018 EN Anjali Goel Department of Chemistry, KGC, Gurukul Kangri University, Haridwar, Uttrakhand, 249407, India Sudha Tomar Department of Chemistry, KGC, Gurukul Kangri University, Haridwar, Uttrakhand, 249407, India Shikha Tomar Department of Chemistry, KGC, Gurukul Kangri University, Haridwar, Uttrakhand, 249407, India Journal Article 2020 06 19 The present work is mainly focused on the synthesis and characterization of surfactant-assisted Ir-Sn BMNP (bimetallic nanoparticles) using modified polyol method. CTAB (Cetyltrimethylammonium bromide), TSC (Trisodium citrate), and TX-100 (Triton X-100) as cationic, anionic, and nonionic surfactant respectively are used to study their effect on the particle size, morphology, and their stability. The synthesized particles are characterized by XRD, FE-SEM, EDAX, elemental mapping, TEM, HR-TEM, XPS and FT-IR, TGA, DTG, and DTA techniques. UV-Vis spectroscopy is used to monitor the synthesis of nanoparticles. The XRD patterns of all samples confirm that Ir-Sn BMNP are amorphous in nature. The influence of surfactant on the morphology and particle size of Ir-Sn BMNP samples was examined by the FE-SEM technique. The FE-SEM figures demonstrate that the particles of bimetal are in nano size, highly dispersed, and pseudo spherical in shape with smooth surfaces. The approximate crystallite (particle/grain) size of CTAB, TSC, and TX-100 assisted samples are ~1.39 nm (39 nm), ~2.2 nm (59 nm), and ~5.79 nm (89 nm) respectively, which are estimated from TEM and FE-SEM images. The presence and distribution of Ir and Sn elements in the BMNP is determined through EDAX and elemental mapping respectively. These techniques show that CTAB assisted Ir-Sn BMNP sample is in alloy form but TSC and TX-100 samples are in core-shell form, where the Ir core is surrounded by Sn shell. The XPS confirms the metallic state (Ir0), and the dual valence state of Sn (Sn2+ and Sn4+) is in the Sn 3d core level. https://jns.kashanu.ac.ir/article_111310_d1f3f9bfa0c57584665badf9f0633d7f.pdf