Effect of Nickel Incorporation on Nitrogen-Doped Titania/Zirconia Nanocomposites for Enhanced Visible-Light Photocatalytic Degradation of Phenol. - Syoufian, Akhmad; Saviola, Aldino Javier; Janah, Reza Rodhatul; Afifah, Rina; Wijaya, Karna; Kurniawan, Rian; Sudiono, Sri; Oh, Won-Chun; Wangsa, Wangsa (Bulletin of Chemical Reaction Engineering & Catalysis, 2026)