可调的结构-属性工程和可见光光催化性能ZnO:TiO2纳米复合材料通过固态路径合成
Saliou Baïlo Diallo1, N Khlifi2, Modou Fall1
1Laboratory of Organic Physical Chemistry and Environmental Analyses, Department of Chemistry, Faculty of Sciences and Techniques, Cheikh Anta Diop University Dakar Senegal.
RSC advances
|January 21, 2026
概括
这项研究合成了添加氧化物 (ZnO:TiO2) 纳米复合材料. Ti-doping 增强了可见光光催化剂用于甲蓝的降解,在 10-15% Ti 含量下获得最佳结果.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 固态化学 固态化学
背景情况:
- 氧化 (ZnO) 是一种多功能半导体,在光催化中具有应用.
- 二氧化 (TiO2) 是一种众所周知的光催化剂,但在可见光下其效率有限.
- 用TiO2合ZnO可以改变其结构,光学和光催化性能.
研究的目的:
- 使用固态方法合成和表征 (1-x) ZnO:(x) TiO2纳米复合材料.
- 研究TiO2含量对ZnO的结构,光学和光催化性能的影响.
- 评估这些纳米复合材料在可见光下对甲基蓝色降解的潜力.
主要方法:
- 固态合成ZnO:TiO2纳米复合材料与不同的TiO2度 (x = 0.01到0.15).
- 使用X射线衍射 (XRD) 和富里埃变换红外光谱 (FTIR) 的结构特征.
- 通过UV-Vis反射光谱学分析光学特性,并使用Tauc模型计算带隙能量.
- 通过可见光下的甲蓝降解进行光催化活性评估.
主要成果:
- 在ZnO中,XRD证实了Ti4+的替代性注,直到x=0.05,在较高度下形成Zn2TiO4的二次阶段.
- 水晶石的尺寸随着TiO2含量增加而减少,从50.8nm降至22.2nm.
- 带隙能量显示红移,表明带隙缩小.
- Ti-doped ZnO纳米复合材料在可见光下表现出增强的甲蓝降解,ZnTi10%和ZnTi15%样本降解87%.
结论:
- 固态合成对于生产 ZnO:TiO2 纳米复合材料是有效的.
- Ti-doping 显著改变了 ZnO 的结构和光学特性.
- 合成的ZnO:TiO2纳米复合材料在可见光下改善了甲蓝降解的光催化效率,这是由于缺陷状态和界面效应造成的.
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