Nanophotonics and Applications Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef, 62514, Egypt.
Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef, 62514, Egypt.
Sci Rep. 2018 Jan 15;8(1):781. doi: 10.1038/s41598-018-19172-w.
TiO nanoribbons (TiO NRs) loaded with FeCo-AlO catalyst were synthesized and used as a precursor in the synthesis of TiO nanoribbons/carbon nanotubes (TiO NRs/CNTs) composite by a chemical vapor deposition (CVD) method. TiO NRs and TiO NRs/CNTs composite were characterized by XRD, FT-IR, TEM, SEM, EDX and UV-Vis spectrophotometer. The results revealed the formation of TiO-B and hydrogen titanate nanoribbon like structures by the hydrothermal treatment. After loading TiO NRs by FeCo-AlO catalyst and the CVD growth of carbon nanotubes, the synthetic TiO nanoribbons converted entirely to TiO-B nanoribbons with nanopits structure. The composite composed of tube-like nanostructures forming an interlocked network from CNTs and TiO-B NRs. The composite shows a relatively red-shifted band gap (3.09 eV), broader and stronger UV absorption band relative to TiO NRs. The photocatalytic properties of TiO NRs and TiO NRs/CNTs composite were studied under sunlight irradiation. The photocatalytic degradation of methylene blue (MB) dye was investigated as a function of contact time, dye concentration, and catalyst dose. The kinetics and mechanisms of degradation were discussed. TiO NRs/CNTs composite showed higher stability after six runs and 50% shorter irradiation time than TiO NRs photocatalyst.
负载 FeCo-AlO 催化剂的 TiO 纳米带（TiO NRs）被合成，并通过化学气相沉积（CVD）方法用作 TiO 纳米带/碳纳米管（TiO NRs/CNTs）复合材料的前体。TiO NRs 和 TiO NRs/CNTs 复合材料通过 XRD、FT-IR、TEM、SEM、EDX 和紫外-可见分光光度计进行了表征。结果表明，通过水热处理形成了 TiO-B 和氢钛酸盐纳米带样结构。在负载 TiO NRs 由 FeCo-AlO 催化剂和 CVD 生长的碳纳米管之后，合成的 TiO 纳米带完全转化为具有纳米坑结构的 TiO-B 纳米带。该复合材料由 CNTs 和 TiO-B NRs 形成的互锁网络的管状纳米结构组成。与 TiO NRs 相比，该复合材料表现出相对红移的带隙（3.09 eV），更宽和更强的紫外吸收带。在阳光照射下研究了 TiO NRs 和 TiO NRs/CNTs 复合材料的光催化性能。研究了作为接触时间、染料浓度和催化剂剂量函数的亚甲基蓝（MB）染料的光催化降解。讨论了降解的动力学和机制。与 TiO NRs 光催化剂相比，TiO NRs/CNTs 复合材料在六次运行和 50%更短的照射时间后显示出更高的稳定性。
