Zhang Zewu, Ma Yuhang, Bu Xiaohai, Wu Qiong, Hang Zusheng, Dong Zhao, Wu Xiaohan
School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing, 21167, P. R. China.
Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing, 21167, P. R. China.
Sci Rep. 2018 Jul 12;8(1):10532. doi: 10.1038/s41598-018-28832-w.
Novel TiO/Ag/SnO composites were successfully prepared by a facile one-step reduction approach using stannous chloride as both SnO precursor and reducing agent. The Ag nanoparticles with sizes of 2.04-3.94 nm were located on TiO matrix and immobilized by the surrounded SnO. The resulted TiO/Ag/SnO nanocomposites were used as photocatalyst for photodegradation of methylene blue under visible light. The experimental results demonstrated that the visible light photocatalytic activity of the TiO/Ag/SnO was significantly enhanced in comparison with the individual TiO or the binary composite (TiO/Ag or TiO/SnO) and the degradation rate was up to about 9.5 times that of commercial TiO. The photocatalytic activity of the TiO/Ag/SnO composites could be well controlled by simply tuning the dosages of Ag precursor and the optimized activity of the composites was obtained when the dosage of Ag precursor was 2%. Moreover, the TiO/Ag/SnO photocatalyst exhibited high stability for degradation of methylene blue even after four successive cycles.
采用氯化亚锡作为二氧化锡前驱体和还原剂，通过简便的一步还原法成功制备了新型TiO/Ag/SnO复合材料。尺寸为2.04 - 3.94 nm的银纳米颗粒位于TiO基体上，并被周围的SnO固定。所得的TiO/Ag/SnO纳米复合材料用作可见光下光催化降解亚甲基蓝的光催化剂。实验结果表明，与单独的TiO或二元复合材料（TiO/Ag或TiO/SnO）相比，TiO/Ag/SnO的可见光光催化活性显著增强，降解率高达商用TiO的约9.5倍。通过简单调整银前驱体的用量，可以很好地控制TiO/Ag/SnO复合材料的光催化活性，当银前驱体用量为2%时，复合材料获得了最佳活性。此外，即使经过四个连续循环，TiO/Ag/SnO光催化剂对亚甲基蓝的降解仍表现出高稳定性。
