Facile synthesis of ZnO–Ag nanocomposite supported by graphene oxide with stabilised band-gap and wider visible-light region for photocatalyst application oleh Saharman Gea, Suhut A. Situmorang, Nurhaida Pasaribu, Averroes F.R. Piliang, Boy Attaurrazaq, Reka Mustika Sari, Khatarina Meldawati Pasaribu, Stergios Goutianos