Hydrothermal synthesis of hierarchical flower-like α-CNTs/SnO₂ architectures with enhanced photocatalytic activity

Abstract

The hierarchical flower-like α-CNTs/SnO₂ architectures composed of curved sheets are synthesized with hydrothermal method at 160 °C for 8 h. The α-CNTs/SnO₂ composite was doped with α-CNTs during preparation, the photocatalytic activity of α-CNTs/SnO₂ was evaluated by photodegradation of Rhodamine B (RhB) under simulated visible light. The results showed that the photocatalytic activity of α-CNTs/SnO₂ for degradation of RhB was up to 90.35% within 120 min, which was much higher than that of pure compound. It was significantly found that the introduction of α-CNTs, which may suppressed the recombination of photogenerated electron-hole pairs on the interface of SnO₂, leading to enhanced photocatalytic activity.

Keywords:

• α-CNTs/SnO₂
• Photocatalytic degradation of dyes
• Crystal structure