%0 Journal Article
%T Photocatalytic Decolorization of Acid Red 4 Azo Dye by Using Immobilized TiO2 Microparticle and Nanoparticle Catalysts
%A Doni Sugiyana
%A Bambang Soenoko
%A Marisa Handajani
%A Suprihanto Notodarmojo
%J Makara Seri Sains
%D 2012
%I Universitas Indonesia
%X This research studied the synthesis of immobilized TiO2 microparticle and nanoparticle catalyst materials and evaluated its photocatalytic activity on the decolorization of Acid Red 4 (AR4) azo dye solution. TiO2 microparticles were immobilized on an acrylic plate, while TiO2 nanoparticles were immobilised on a glass plate. TiO2 nanoparticles were embedded in a nanofiber support layer to enhance photocatalytic performance, forming a nanofiber-nanoparticle composite on the glass plate. In the catalyst load 2.0 g/l, the performance of the photocatalytic layer of immobilized catalyst (k '= 0.013 min-1) is better than that of the suspended catalyst (k' = 0.008 min-1). Photocatalytic decolorization efficiency of TiO2 immobilized catalysts of nanoparticle sized reached 82.3% in irradiation time of 2 hours, which is higher than microparticle sized catalysts (77.8%). The technique of TiO2 nanofiber¨Cnanoparticle composite showed improved photocatalytic kinetics (kĄŻ= 0.018 min-1) compared to a single layer of nanoparticle catalyst (k'= 0.015 min-1). Immobilized TiO2 catalysts remain effective with repeated use despite a slight decrease in processing efficiency.
%K azo dye
%K decolorization
%K photocatalytic
%K TiO2
%K wastewater
%U http://journal.ui.ac.id/index.php/science/article/view/1475/1273