Green Synthesis Nanomaterial Ga2O3 via Ekstrak Daun Pepaya Jepang (Cnidoscolus aconitifolius) dalam Berbagai Pelarut: Sifat Optik, Struktur, Morfologi, dan Aktivitas Fotokatalitik = Green Synthesis of Ga2O3 Nanomaterial via Cnidoscolus aconitifolius Leaf Extract in Various Solvents: Optical, Structural, Morphological, and Photocatalytic Activity