ANALISIS MIKROSTRUKTUR LAPISAN TIPIS TiO2:ZnO YANG DIDEPOSISIKAN DIATAS SUBTRAT KACA DENGAN METODE SPRAY COATING UNTUK DEGRADASI LIMBAH ZAT WARNA

Abstract

TiO₂ is known as a good material candidate for environmental pollutant degradation. A combination of ZnO and TiO₂ in the hope of enhancing the ability of ZnO in degrading the dye liquids. Precursor solutions TiO₂, ZnO and TiO₂: ZnO are deposited using sol-gel method of Spray Coating Technique. Microstructures of TiO₂ and TiO₂: ZnO thin films with and without the ZnO buffer layer were observed using X-Ray Diffraction (XRD). The photocatalyst activity was tested on Direct Blue degradation. The results conclude that TiO₂: ZnO and ZnO thin films can form well above the glass substrate shown by the appearance of peaks of either ZnO or TiO₂. But for TiO₂ thin layers do not munujukan good results. The incorporation of TiO₂: ZnO causes a lattice strain on the thin TiO₂: ZnO film resulting in the narrowing of the energy band gap, resulting in increased photocatalytic capability of the thin film. TiO₂: ZnO thin film has better photocatalytic capability than TiO₂ or ZnO thin films.