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Nowadays the growth of the textile industry in Indonesia is increasing. An example of dangerous textile waste is Rhodamine-B. Therefore, a method to treat Rhodamine B waste is needed. One method that can be used is photocatalysis. ZnO and TiO 2  semiconductors are known as good photocatalyst material because they have a small band gap energy. In addition, reduced graphene oxide (rGO) has a potential due to its good conductivity and large surface area. This study aims to synthesize ZnO/rGO/TiO 2  composite. Analysis of the composite shows peaks correspond to diffraction pattern of ZnO, TiO 2 , and rGO. Based on scanning electron microscope analysis, the surface morphology of the composite was in the form of sheets (rGO), agglomerates (TiO 2 ), and hexagonal nanorod (ZnO). Further confirmation by EDX analysis shows elemental compositions of Zn, Ti, O, C (18.44, 7.44, 46.01, 28.11, respectively). FTIR analysis resulting in bands of C-O at 998 cm −1 , Ti-O-Ti at 506 cm −1 , and Zn-O at 497 cm −1 . Photocatalysis test using the composite gave the optimum value of Rhodamine-B degradation of 94.72 % under UV light irradiation for 5 hours.

Synthesis of ZnO/rGO/TiO2 Composite and Its Photocatalytic Activity for Rhodamine B Degradation

Synthesis of ZnO/rGO/TiO₂ Composite and Its Photocatalytic Activity for Rhodamine B Degradation