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Synthesis and characterization of metal oxides supported keggin type polyoxometalate Rb2K2[-H2SiV2W10O40].nH2O Gultom, Eiffel Ostan Jeski; Lesbani, Aldes
Science and Technology Indonesia Vol 2 No 2 (2017): April
Publisher : ARTS Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1737.488 KB) | DOI: 10.26554/sti.2017.2.2.50-55

Abstract

Synthesis of material based on polyoxometalate Rb2K2[γ-H2SiV2W10O40].nH2O with SiO2, TiO2, ZrOCl2, and TaCl­5 was carried out to form Rb2K2[γ-H2SiV2W10O40].nH2O-SiO2, Rb2K2[γ-H2SiV2W10O40].nH2O-TiO2 Rb2K2[γ-H2SiV2W10O40].nH2O-ZrOCl2 and Rb2K2[γ-H2SiV2W10O40].nH2O-TaCl5. Materials from preparation were characterized through functional group analysis using FT-IR spectrophotometer, crystallinity analysis using XRD and surface photograph analysis using SEM. The results show that material Rb2K2[γ-H2SiV2W10O40].nH2O was successfully loaded with SiO2, ZrOCl2 and TaCl5.  Based on SEM photo Rb2K2[γ-H2SiV2W10O40].nH2O-TiO2 and Rb2K2[γ-H2SiV2W10O40].nH2O-ZrOCl2 were the best material from preparation base on the homogeneity particle distribution. The FT-IR spectrum shows specific wavenumber for nanomaterial Rb2K2[γ-H2SiV2W10O40].nH2O-TiO2 in the range 455-910 cm­-1 and Rb2K2[γ-H2SiV2W10O40].nH2O - ZrOCl2 in the range 393.48-1404 cm-1. XRD pattern for material Rb2K2[γ-H2SiV2W10O40].nH2O-TiO2 and Rb2K2[γ-H2SiV2W10O40].nH2O-ZrOCl2 show there is a difference between polyoxometalate Rb2K2[γ-H2SiV2W10O40].nH2O, TiO2 and ZrOCl2. SEM photo analysis of Rb2K2[γ-H2SiV2W10O40].nH2O-TiO2 and Rb2K2[γ-H2SiV2W10O40].nH2O-ZrOCl2 showed that material polyoxometalate with support has a diameter size of particle above 100 nm. Keywords: Rb2K2[γ-H2SiV2W10O40].nH2O, polyoxometalate, SiO2, TaCl5, TiO2, ZrOCl2.