Figure 3From: A facile chemical conversion synthesis of Sb2S3 nanotubes and the visible light-driven photocatalytic activitiesFE-SEM images of the Sb 2 S 3 nanotubes under different annealing temperatures. (a) as-prepared at 90°C for 16 h before annealing; annealed in argon atmosphere at (b) 200°C, (c) 250°C, and (d) 400°C for 1 h, respectively.Back to article page