S. Priatmoko, E. Widhihastuti, N. Widiarti, D. Subagja
The synthesis of Ni-TiO2 and NiO-TiO2 with titanium isopropoxide and (Ni(NO3)2•6H2O precursors using the sol gel method has been done. The calcination process was carried out by varying the order of the oxidation-reduction process and the temperature of calcination. The oxidation-reduction process produced Ni-TiO2 material. XRD analysis (X-Ray Diffraction Spectrophotometer) showed the smallest size of Ni-TiO2 particles was 7.44 nm and NiO-TiO2 was 8.53 nm. The addition of dopants caused the TiO2 band gap to become smaller. The smallest band gap due to Ni dopant was 2.68 eV while the smallest band gap due to the addition of NiO dopants was 2.81eV. SEM-EDX (Scanning Electron Microscope-Energy Dispersive X-ray) results showed that the TiO2 surface which was doped with Ni and NiO had small and smooth surface compared to TiO2 without dopant. The synthesized material was then used for the photocatalytic activity test, that was the degradation of methylene blue. The highest degradation of methylene blue was in TiO2 doped with Ni was 76.93%, while in TiO2 doped with NiO was 80.63%. © Published under licence by IOP Publishing Ltd.
Chemistry Department, Faculty of Mathematics and Natural Sciences, Universitas Negeri Semarang, Indonesia
