Synthesis of TiO2 Photoelectrode Nanostructures for Sensing and Removing Textile Compounds Rhodamine B

Abstract

The study of the sensing and removal of Rhodamine B (RhB) textile compounds is the photoelectrocatalytic system applications development. RhB was used as a model to study the performance of TiO2 (NTiO2) photoelectrode nanostructures as environmentally friendly sensors. The synthesis of NTiO2 was carried out on the surface of the Titanium electrode by applying a potential bias of 25.0 V. The NTiO2 formed on the surface of the Titanium electrode (NTiO2/Ti) was characterized using SEM, XRD, FTIR, and Cyclic Voltammetry (CV). The formation of NTiO2 is characterized by the formation of a honeycomb-like tube on the Ti electrode surface. In addition, it is strengthened by diffractogram peaks at 2ϴ = 25 o and 48 o and IR absorption at wavenumbers of 3441.01 cm-1 (-OH groups) and 1629.85 cm-1 (Ti-O group). As for the results of sensing RhB using CV, it is known that RhB is oxidized on the surface of NTiO2/Ti with a value of Ea = 1.54 V. The oxidation process that occurs is controlled by the diffusion rate. Based on the results of photoelectrocatalytic RhB removal for 60 minutes, it was shown that using 0.10 M NaCl support electrolyte effectively increased the RhB removal rate. The decrease in RhB concentration during the photoelectrocatalytic removal process was 74.21%.