TiO2纳米结构中的相位过渡和带隙调制,用于增强可见光活动和环境应用
Rajwali Khan1,2, Nasir Rahman2, Adhimoorthy Prasannan3
1National Water and Energy Center, United Arab Emirates University, 15551, Al Ain, United Arab Emirates.
Scientific reports
|June 26, 2025
概括
与 (Al) 和硫 (S) 离子一起配合二氧化 (TiO2) 纳米颗粒,增强了它们在可见光中的光活性. 这项研究表明,甲蓝色染料的光催化降解得到了改善,这为环境修复提供了潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 环境化学环境化学
背景情况:
- 提高二氧化 (TiO2) 纳米颗粒的可见光光活性对于气候和能源应用至关重要.
- 纯TiO2主要存在于解酶阶段 (AP),限制了其在可见光下的效率.
研究的目的:
- 研究与 (Al3+/Al2+) 和硫 (S6+) 离子联合化TiO2纳米颗粒对其性能的影响.
- 评估化TiO2在可见光中增强的光催化活性,用于环境修复.
主要方法:
- 合成和特征的Al/S联合化TiO2纳米粒子.
- 分析相位转换,结构变化,光学特性 (光发光,带间隙) 和晶格应变 (拉曼,FTIR).
- 在可见光和动力分析下评估甲蓝 (MB) 染料的光催化降解.
主要成果:
- 协同兴奋剂诱导了TiO2纳米颗粒从解剖酶到鲁基相 (RP) 的相变,其RP含量各不相同.
- 兴奋剂导致频段间隙减少 (降至1.98 eV),氧气空缺增加,增强可见光吸收.
- 与纯TiO2 (15%) 和RP-TiO2 (65%) 相比,Al/S联合剂的TiO2具有显著更高的光催化活性,降解了96.4%的MB染料.
结论:
- 与Al和S离子联合合TiO2,通过改变相位,带间隙和缺陷结构,有效调节其光催化特性.
- 增强的可见光光活性使得这些杂的TiO2纳米粒子对环境修复应用具有前景.
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