TiO₂ 涂层光纤用于地下水修复。

TiO₂-Coated Optical Fibres for Groundwater Remediation.

机构信息

School of Civil and Environmental Engineering, University of Technology, Sydney (UTS), City Campus, Broadway, NSW 2007, Australia.

School of Chemical Engineering, Chonnam National University, Gwangju 61186, Korea.

出版信息

J Nanosci Nanotechnol. 2019 Feb 1;19(2):1086-1089. doi: 10.1166/jnn.2019.15970.

DOI:10.1166/jnn.2019.15970

PMID:30360207

Abstract

In this study, polyethylene glycol (PEG) was tested as an alternative polymer to improve the coating of TiO₂ particles onto optical fibres. The addition of PEG helped dispersing effectively the particles in solution to control their deposition and therefore achieving better properties of the coating film. Results showed that PEG increased the effectiveness of the coating and the prepared fibres showed better performance for the removal of methylene blue (MB). This was attributed to the morphological changes induced by PEG. EDX mapping of the fibre surface showed that the addition of PEG lead to a better coverage of the fibre surface; increasing the active surface area for subsequent photocatalytic degradation. This study also showed that the light intensity, pH and initial concentration of MB have a significant influence. Finally, it was demonstrated that the coatings using PEG were better ordered and structured; showing a distinct layer-by-layer deposition.

摘要

在这项研究中，聚乙二醇（PEG）被测试为一种替代聚合物，以改善 TiO₂ 颗粒在光纤上的涂层。PEG 的添加有助于有效地分散颗粒在溶液中，以控制其沉积，从而获得更好的涂层膜性能。结果表明，PEG 提高了涂层的效果，制备的纤维对亚甲基蓝（MB）的去除表现出更好的性能。这归因于 PEG 引起的形态变化。纤维表面的 EDX 映射表明，PEG 的添加导致纤维表面的更好覆盖；增加了后续光催化降解的有效表面积。这项研究还表明，光强度、pH 值和 MB 的初始浓度有显著影响。最后，证明了使用 PEG 的涂层具有更好的有序结构；表现出明显的逐层沉积。