高性能,稳定的CoNi LDH@Ni泡复合膜,具有创新的过氧单硫酸盐激活,用于破坏2,4-二二
Yu Liu1, Weibao Liu1, Xinrui Gan2
1Key Laboratory for Environmental Pollution Prediction and Control, Gansu Province, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China.
Journal of environmental sciences (China)
|February 26, 2024
概括
合成和优化了-层双氧化物 (CoNi LDH),以激活过氧化硫酸盐 (PMS). CoNi LDH@尼克尔泡复合材料在去除2,4-二二醇方面表现出极好的效率.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 催化剂是一种催化剂.
背景情况:
- 层状双氧化物 (LDH) 是各种应用的有希望的材料.
- 氧硫酸盐 (PMS) 的激活对于污染物降解至关重要.
- 开发稳定高效的异质催化剂对于环境修复至关重要.
研究的目的:
- 为了合成和描述不同Co/Ni比率的-层双氧化物 (CoNi LDH).
- 调查CoNi LDH在2,4-二二醇 (2,4-DCP) 降解中的过氧硫酸盐 (PMS) 激活的催化性能.
- 构建一个稳定的CoNi LDH@Nickel泡 (CoNi LDH@NF) 复合材料,以提高催化稳定性和效率.
主要方法:
- 合成不同Co/Ni质量比的CoNi LDH.
- CoNi LDH@尼克尔泡 (CoNi LDH@NF) 复合膜的制造.
- 使用CoNi LDH@NF-PMS系统对2,4-DCP去除的催化活性进行评估.
- 催化剂形态,结构和表面性能的表征.
- 识别参与降解过程的活性氧物种 (ROS).
主要成果:
- Co1Ni3 LDH 显示出 PMS 激活效率最高的 2,4-DCP 清除.
- CoNi LDH@NF复合膜表现出增强的稳定性和催化性能.
- 在最佳条件下,CoNi LDH@NF-PMS系统在90分钟内实现了99.22%的2,4-DCP降解效率.
- 催化剂具有丰富的腔结构,大特定表面积和足够的活性位点.
- 基基 (·OH),硫酸盐基 (SO4·−) 和单片氧 (1O2) 被确定为主要的ROS,负责2,4-DCP分解.
结论:
- CoNi LDH@NF复合膜为基于PMS的2,4-DCP的降解提供了卓越的稳定性和适应性.
- 这项研究阐明了CoNi LDH@NF的PMS激活机制,突出了OH,SO4·−和1O2.2的作用.
- 这项工作为环境应用中选择PMS异质催化剂提供了新的理论基础.
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