低温合成,表征和光催化性质的瓦纳酸盐LaVO的低温合成,表征和光催化性质的LaVO4
S Lotfi1, M El Ouardi1,2, H Ait Ahsaine1
1Laboratoire de chimie appliquée des matériaux, faculté des sciences, Mohammed V University in Rabat, Morocco.
Heliyon
|June 30, 2023
概括
为了高效的光催化,合成了四角形兰坦瓦纳酸盐 (LaVO4) 纳米粒子. 这些纳米粒子在可见光下实现了98.2%的甲蓝的降解,证明了它们对环境修复的潜力.
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:
- 兰瓦纳酸盐 (LaVO4) 是用于光催化应用的有希望的材料.
- 为提高LaVO4纳米颗粒的性能,开发高效的合成方法至关重要.
- 了解LaVO4的光学和结构性质是优化其光催化活性的关键.
研究的目的:
- 使用简单的共同沉方法合成四角形兰坦瓦纳酸盐 (LaVO4) 纳米颗粒.
- 描述合成的LaVO4纳米粒子的结构性,微结构性和光学性质.
- 为了评估LaVO4纳米颗粒在可见光下降解甲蓝的光催化活性.
主要方法:
- 在室温下用于纳米粒子合成的共同沉方法.
- 使用X射线衍射 (XRD),UV-Vis扩散反射光谱 (DRS),传输电子显微镜 (TEM) 和拉曼光谱法进行表征.
- 在可见光照射下使用甲蓝 (MB) 作为模型污染物的光催化降解实验.
主要成果:
- 成功合成了具有针状纳米结构的单个四角形阶段LaVO4纳米粒子.
- 确定带隙能量为3.26 eV,电荷载体平均寿命为1 ns.
- 在可见光照射90分钟内达到98.2%的甲蓝降解,表明高光催化效率.
- 研究了光催化机制,并证实了LaVO4纳米颗粒的可重复使用性.
结论:
- 简单的共同沉方法是有效的生产四边形LaVO4纳米颗粒具有光催化所需的特性.
- 拉沃4纳米粒子表现出显著的可见光驱动的光催化活性,用于降解甲蓝等有机污染物.
- 合成的LaVO4纳米颗粒显示出在环境修复和废水处理方面的实际应用潜力.
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