Research Team "Materials and Applied Catalysis: MCA", CBAE Laboratory, Moulay Ismail University, Faculty of Sciences, BP.11201 Zitoune, Meknès, Morocco.
Research Team "Materials and Applied Catalysis: MCA", CBAE Laboratory, Moulay Ismail University, Faculty of Sciences, BP.11201 Zitoune, Meknès, Morocco.
Chemosphere. 2021 Mar;266:128931. doi: 10.1016/j.chemosphere.2020.128931. Epub 2020 Nov 11.
In this study, Co-TiO nanoparticles were successfully synthesized using sol-gel and precipitation methods. The effect of Co amount on the physicochemical properties of these nanomaterials was investigated using various techniques. The obtained results showed that the structural and optical properties of the synthesized Co-TiO nanomaterials depended closely on the weight percent of Co added to TiO. It was found that, for 1%Co-TiO, a substitution of Ti and Co/Co within the lattice of TiO was happened. The results of the photocatalytic degradation of methyl orange (MO) experiments carried out in the presence of the as prepared nanomaterials showed that under visible light, the sample 1%Co-TiO exhibited the best MO conversion. The enhanced photocatalytic activity has been attributed to the efficient charge separation of electrons and holes. The mechanistic studies revealed that O, h and OH are the major active species, and a possible mechanism degradation pathway of MO dye is proposed.
在这项研究中，成功地使用溶胶-凝胶和沉淀法合成了 Co-TiO 纳米粒子。使用各种技术研究了 Co 含量对这些纳米材料的物理化学性质的影响。得到的结果表明，合成的 Co-TiO 纳米材料的结构和光学性质与添加到 TiO 中的 Co 的重量百分比密切相关。发现，对于 1%Co-TiO，Ti 和 Co/Co 在 TiO 晶格内发生了取代。在制备的纳米材料存在下进行的甲基橙 (MO) 光催化降解实验的结果表明，在可见光下，样品 1%Co-TiO 表现出最佳的 MO 转化率。增强的光催化活性归因于电子和空穴的有效电荷分离。机理研究表明，O、h 和 OH 是主要的活性物质，并提出了 MO 染料的可能降解途径。
