NiO和CeO薄膜在使用臭氧去除酸的有效催化活性2
Daynahi Franco Peláez1, Julia Liliana Rodríguez S1, Tatyana Poznyak1
1Laboratorio de Investigación en Ingeniería Química Ambiental, ESIQIE-Instituto Politécnico Nacional Zacatenco Ciudad de México 07738 Mexico jlrodriguezs@ipn.mx ozliliana@yahoo.com.mx.
RSC advances
|January 29, 2024
概括
氧化 (CeO2) 薄膜通过催化臭氧化显著改善了酸的去除,达到80%以上的矿化. 这些可重复使用的薄膜为水污染物处理提供了一个有希望的,易于分离的方法.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 酸是一种常见的水污染物.
- 臭氧化是一种有效的氧化过程,用于去除污染物.
- 开发用于催化臭氧化的高效催化剂至关重要.
研究的目的:
- 使用喷雾热解合成氧化 (NiO) 和氧化 (CeO2) 薄膜.
- 评估这些薄膜在通过催化臭氧化去除酸的效率.
- 研究CeO2在增强催化活性中的作用.
主要方法:
- 喷雾烧解用于薄膜合成 (NiO和CeO2).
- 催化臭氧化实验用于酸去除.
- 用于表面分析的X射线光电子光谱 (XPS).
- 用X射线衍射 (XRD) 和扫描电子显微镜 (SEM) 来进行材料表征.
主要成果:
- 通过催化臭氧化,CeO2薄膜显著增强了酸矿化 (>80%).
- CeO2促进了反应性氧物种的产生 (基基,超氧基,单片氧).
- 在CeO2表面上氧基度较高与催化活性增加相关.
- 对于NiO和CeO2膜,XRD证实了多晶体立方结构.
- SEM揭示了分布良好的NiO纳米粒子和CeO2膜中的一些缺陷.
- 在五个循环中,CeO2膜表现出极好的稳定性和可重复使用性.
结论:
- CeO2薄膜是使用臭氧化去除酸的高效催化剂.
- 增强的催化活性归因于产生活性氧物种和活性基团.
- 喷雾热化CeO2薄膜为水处理应用提供了稳定,可重复使用和易于分离的替代方案.
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