Effect of solvent on modified platinium doped TiO2 [Pt-TiO2] in degradation reactive red 4 dye / Nurfatin Najihah Roslan

In this study, modified Platinum (Pt) doped TiO2 was prepared via photo-deposition method by using hexa-chloroplatinic acid (H2PtCl6) as Pt precursor. The prepared sample was divided into several portions prior undergo washing method with various solvents. The solvents used were, dichloromethane (DCM), ethanol, methanol, and acetone. While distilled water was used as a blank washing sample for comparison study. All the washing solvents was chosen based on the normal solvent used for washing process and the solvents boiling point are below 100°C. The photoactivity of all solvents modified Pt doped TiO2 samples were measured by degradation of RR4 dye under suspension mode, the presence of Pt element was detected for all solvents modified Pt-TiO2 samples confirmed by FTIR, XRD, and ICP-OES where only small Pt element was observed for all the samples. The increasing of hydroxyl group was detected from Pt doped TiO2 under DCM washing was this sample able to have an excellent contact with aqueous dye and it proves by enhanced the photocatalytic performance under RR4 dye with the highest photodegradation obtained was dichloromethane with complete degradation of 30ppm RR4 dye achieved within 5 minutes under 55 W fluorescent lamp irradiation.