Fig. 4From: Surfactant-Tuned Phase Structure and Morphologies of Cu2ZnSnS4 Hierarchical Microstructures and Their Visible-Light Photocatalytic ActivitiesFESEM images of the CZTS particles prepared at 200 °C for 48 h with different surfactants, such as a ethylene diamine tetraacetic acid (EDTA), b citric acid (CA), and c tartaric acid (TA), as well as FESEM images of the CZTS particles prepared at 200 °C for 48 h with different amounts of tartaric acid (TA), such as 1:2 (d), 1:4 (e), and 1:8 (c). f Schematic illustrations of the formation and growth process for flower-like CZTS particles assembled by nanosheetsBack to article page