DEGRADASI METHYL VIOLET SECARA FOTOLISIS DAN SONOLISIS DENGAN KATALIS TiO2/SiO2

Belina Harnum (Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Padang, Jl. Prof. Dr.Hamka, Padang)
Hardeli Hardeli (Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Padang, Jl. Prof. Dr.Hamka, Padang)
Hary Sanjaya (Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Padang, Jl. Prof. Dr.Hamka, Padang)

Jurnal Periodic Jurusan Kimia UNP
Vol 2, No 2 (2013)

Degradation of methyl violet dye had been done by photolysis and sonolysis with adding TiO2/SiO2 catalyst. This study aims to determine the optimum time for degradation and optimum dopan silica (SiO2). Photolysis method were performed using an irradiation of UV light l= 254 nm and sonolysis  using an ultrasound with frequency 45 kHz. Result methyl violet degradation products obtained under optimum conditions identified by GC-MS. The optimum time for degradation of methyl violet photolysis is 270 minutes, the addition of silica optimum dopan occurs on addition of  25% SiO2, with percentage of degradation (%D)  is  96.52%.  The optimum  time in the degradation of methyl violet  in sonolysis photolysis is 270 minutes and the addition of silica optimum dopan occurs on addition of  25% SiO2, with percentage of degradation (% D)  is  76.19%. Identification of the GC-MS results obtained showed many peaks that have occurred in the degradation of methyl violet molecules.