TY - JOUR AU - Hafizah, N.Z. AU - M. Juoi, J. AU - Zulkifli, M.R. AU - Musa, M.A. PY - 2020/10/09 Y2 - 2024/03/28 TI - Effect of Silver Content on the Crystalline Phase and Microstructure of TiO2 Coating Deposited on Unglazed Ceramics Tile JF - International Journal of Automotive and Mechanical Engineering JA - Int. J. Automot. Mech. Eng. VL - 17 IS - 3 SE - Articles DO - 10.15282/ijame.17.3.2020.11.0615 UR - https://journal.ump.edu.my/ijame/article/view/4149 SP - 8179-8185 AB - <p>The synthesis of Ag-TiO<sub>2</sub> coating using AgNO<sub>3 </sub>precursor is expected to give the properties as pure as Ag nanoparticles. Commonly, high concentration of Ag attributed to agglomeration of silver species and reduction to Ag<sup>0</sup> particles on TiO<sub>2</sub> surface. In contrast, at lower concentration, Ag species exist as AgO, Ag<sub>2</sub>O and Ag<sup>0</sup>. Hence, the exact amount of Ag, which can effectively control the particle growth and agglomeration, surface area, thermal stability and band gap of the TiO2 coating, are still vague and stated differently. In the present study, the effect of Ag content on the phase transformation and surface morphology of Ag-TiO<sub>2</sub> coating were reported. TiO<sub>2</sub> sol were prepared by incorporating Ag at 2.5, 5 and 7.5 mol % and deposited on unglazed ceramic tiles thru five times dip coating. The deposited Ag-TiO<sub>2</sub> coatings were heat treated at 500 °C for 1 hour soaking time. XRD analyses revealed that the deposited Ag-TiO<sub>2</sub> coating consists of anatase, rutile, Ag<sub>2</sub>O and metallic Ag. Almost all the coating surfaces illustrated cracks. Increased Ag content lead to presence of tiny particles on the surfaces and EDX spectrum revealed the presence of Ti, O and metallic Ag particles. However, at the addition of 5 mol % Ag<sub>, </sub>there was no metallic Ag presence and a dense coating with the lowest thickness of ±11.4µm is observed.</p> ER -