Fig. 2From: A Facile Method for Preparation of Cu2O-TiO2 NTA Heterojunction with Visible-Photocatalytic ActivitySynthesis procedure of the Cu2O-TiO2 NTA heterojunction films. a Step 1, anodic TiO2 NTAs. b Step 2, fill the tubes with precursor solution. c Step 3, sintered the filled tubes at 400 °C to get the Cu2O-TiO2 NTA heterojunction. d Chemical reaction formula of the sintering processBack to article page