Zahara Ramadani, Sherly Kasuma Warda Ningsih
In this study, CuO/TNAs heterojunction was prepared by the SILAR method. CuO/TNAs were characterized for determination of crystal structure, morphology, and photoelectrochemical properties. The UV–Vis DRS spectrum confirmed the extension of visible light absorption and the reduction of the band gap to 2.44 eV for CuO/TNAs at a 60 mM concentration with 7 SILAR cycles. XRD analysis indicated the formation of the anatase TiO2 phase with peak intensities without altering the crystal structure after modification. FE-SEM morphology results revealed an increase in pore diameter from 46.39 nm to 51 nm after modification. Photoelectrochemical measurements (Linear Sweep Voltammetry and Multi-Pulse Amperometry) showed an increase in photocurrent density for CuO/TNAs (0.035 mA/cm2) compared to pure TNAs (0.005 to 0 mA/cm2). These results indicate an improved charge separation efficiency and photoresponse to visible light. Therefore, CuO/TNAs heterojunctions have the potential to serve as efficient photoanode materials for photoelectrochemical applications. © The Author(s), under exclusive licence to Springer Nature B.V. 2026.
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang, Kampus Air Tawar, Padang, 25132, Indonesia
