铁氧化纳米化固体溶液作为光催化剂,用于在可见辐射下降解污染物
Damiano Cani1, Timo Cuyvers1, Paolo P Pescarmona2
1Centre for Surface Chemistry and Catalysis, University of Leuven (KU Leuven), Kasteelpark Arenberg 23, 3001, Heverlee, Belgium.
ChemSusChem
|September 10, 2024
概括
工程化-铁氧化物 (Inx Fex O3) 纳米颗粒显示了用于降解有机污染物的增强光催化活性. 在可见光下,In1.7Fe0.3O3材料表现出卓越的性能,并在重复使用后保持活性.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 光催化作用的光催化
背景情况:
- 氧化 (In2O3) 和氧化铁 (Fe2O3) 是已知的光催化剂,但在带隙能量和可见光活性方面存在局限性.
- 开发具有可调节带间隙的新型半导体材料对于高效的光催化是至关重要的.
研究的目的:
- 为了合成Inx Fex O3固体溶液作为纳米粒子,为增强光催化剂量量身定制的带间隙.
- 研究这些材料在紫外线和可见光下的有机污染物降解的光催化性能.
主要方法:
- 通过从和铁酸盐的共同沉合成Inx Fex O3纳米颗粒的固体溶液.
- 材料使用X射线衍射 (XRD) 和UV-Vis吸收光谱学进行了表征.
- 通过在水溶液中降解和甲基蓝来评估光催化活性.
主要成果:
- 据证实,Inx Fex O3固体溶液的形成含有5-25mol%之间的Fe含量.
- 与In2O3.3相比,UV-Vis分析显示带隙能量随着Fe含量增加而减少.
- 在1.7Fe0.3O3表现出最高的光催化活性,超过单金属氧化物和TiO2 P25,特别是在可见光下.
- 在四个连续的重复使用周期中,In1.7Fe0.3O3光催化剂保持了其活性.
结论:
- 在Inx Fex O3固体溶液中调整In/Fe比率的策略成功地设计了带间隙,以改善光催化.
- 在1.7Fe0.3O3纳米粒子是可见光下有机污染物降解的高效光催化剂.
- 该材料表现出卓越的稳定性和可重复使用性,使其成为环境修复应用的有希望的候选者.
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