TY - CONF UR - https://repository.unp.ac.id/id/eprint/38733/ KW - Silica-titania catalyst KW - Titanium tetrahedral coordination KW - Biodiesel KW - FTIR KW - DR UV-Vis KW - Transesterification TI - The Effect of Titanium Tetrahedral Coordination of Silica-Titania Catalyst on the Physical Properties of Biodiesel ID - repounp38733 A1 - U. K. Nizar, U. K. Nizar A1 - J. Hidayatul, J. Hidayatul A1 - R. Sundari, R. Sundari A1 - B. Bahrizal, B. Bahrizal A1 - A. Amran, A. Amran A1 - A. Putra, A. Putra A1 - L. Latisma Dj, L. Latisma Dj A1 - I. Dewata, I. Dewata M2 - Padang, West Sumatra, Indonesia Y1 - 2017/10// N2 - This study investigates the correlation of the number of titanium tetrahedral coordination and biodiesel production. The solid-state method has been used to synthesis of silica-titania catalyst for biodiesel production, which the precursors, i.e. silica and titania commercials were heated in the temperature range of 450 - 550°C. The characterization of the prepared silica-titania has been studied by FTIR and DR UV-Vis in order to identify and calculate the presence of titanium tetrahedral coordination in silica-titania catalyst. A very small peak at around 950 cm-1 indicated the presence of titanium tetrahedral coordination through Si?O?Ti bonds. Deconvolution of DR UV-Vis spectra showed the coordination of titanium in silica-titania is more octahedral. However, the number of titanium tetrahedral coordination of the prepared silica-titania is found higher than that of TiO2 commercial. The increasing of titanium tetrahedral fraction in silica-titania affects the physical properties of biodiesel in terms of boiling point, viscosity and density, which is produced by the reaction of methanol and palm oil. AV - public T2 - The 2nd International Conference on Mathematics, Science, Education and Technology (ICMSET) ER -