Preparation of TiO2-coated glass and their application for photodecompose organic dye

TiO2−coated glass has been successfully prepared for practical water treatment application under UV-light irradiation. This work demonstrated the immobilized TiO2 powder on glass support using the dip-and spray coating method. The number of coating processes was varied to studies their effect on photocatalytic efficiency. The annealed process at high temperature was conducted to improve the adhesion of TiO2 powder to the glass substrates. Surface observation of the coating TiO2 showed that the dip-coating method has a better result than the spray coating method. All the glass surfaces can be covered by TiO2 perfectly, and this process did not affect the photocatalytic activity. Almost 100% of 4 ppm Rhodamine B could be decomposed by immobilized TiO2. The current research is potentially used as a standard method to immobilize TiO2 on the glass substrate on a larger scale in the future. Accordingly, separating the process between TiO2 and liquid-based solution after the photocatalytic process is more straightforward.