Elsayed Asmaa M, Ahmed Ashour M, Tammam M T, Eissa M F, Aly Arafa H
Nanophotonics and Applications Lab, Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef, 62514, Egypt.
TH-PPM Group, Physics Department, Faculty of Science, Beni-Suef University, Beni Suef, 62514, Egypt.
Sci Rep. 2024 Jan 10;14(1):1015. doi: 10.1038/s41598-023-50428-2.
The detection of heavy metals in water, especially Pb ions, is important due to their severe hazardous effects. To address this issue, a highly controlled hexagonal TiON/TiO heterostructure has been synthesized in this study. The fabrication process involved the utilization of atomic layer deposition and direct current sputtering techniques to deposit TiO and TiON layers onto a porous AlO membrane used as a template. The resulting heterostructure exhibits a well-ordered hollow tube structure with a diameter of 345 nm and a length of 1.2 µm. The electrochemical sensing of Pb ions in water is carried out using a cyclic voltammetry technique under both light and dark conditions. The concentration range for the Pb ions ranges from 10 to 10 M. The sensitivity values obtained for the sensor are 1.0 × 10 in dark conditions and 1.0 × 10 in light conditions. The remarkable enhancement in sensitivity under light illumination can be attributed to the increased activity and electron transfer facilitated by the presence of light. The sensor demonstrates excellent reproducibility, highlighting its reliability and consistency. These findings suggest that the proposed sensor holds great promise for the detection of Pb ions in water, thereby facilitating environmental monitoring, water quality assessment, and safety regulation across various industries. Furthermore, the eco-friendly and straightforward preparation techniques employed in its fabrication provide a significant advantage for practical and scalable implementation.
检测水中的重金属，尤其是铅离子，因其严重的危害影响而至关重要。为解决这一问题，本研究合成了一种高度可控的六方TiON/TiO异质结构。制备过程包括利用原子层沉积和直流溅射技术，将TiO和TiON层沉积到用作模板的多孔AlO膜上。所得的异质结构呈现出有序的中空管结构，直径为345纳米，长度为1.2微米。使用循环伏安法技术在光照和黑暗条件下对水中的铅离子进行电化学传感。铅离子的浓度范围为10至10 M。该传感器在黑暗条件下获得的灵敏度值为1.0×10，在光照条件下为1.0×10。光照下灵敏度的显著提高可归因于光照促进了活性增加和电子转移。该传感器具有出色的重现性，突出了其可靠性和一致性。这些发现表明，所提出的传感器在检测水中铅离子方面具有很大的潜力，从而有助于跨行业的环境监测、水质评估和安全监管。此外，其制造过程中采用的环保且简单的制备技术为实际和可扩展的应用提供了显著优势。
