Tailoring photocatalytic performance of spin-Coated BiVO4 via calcination time optimization under visible lightGunawan Gunawan, Didik Setiyo Widodo, Nailis Sa’diyah and Roni Adi WijayaE3S Web Conf., 695 (2026) 01002DOI: https://doi.org/10.1051/e3sconf/202669501002