Chemistry Department, College of Science, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia.
School of Materials Science and Engineering, The University of New South Wales, Sydney, New South Wales, 2052, Australia.
Anal Chim Acta. 2021 Oct 2;1180:338860. doi: 10.1016/j.aca.2021.338860. Epub 2021 Jul 23.
Mesopores silica nanotubes (MSNTs)-based chemical sensors for the rapid detection and of highly selective Fe ions have been prepared. The novel nanosensors were prepared via immobilization of 1,10-phenanthroline-5-amine (PA) and bathophenanthroline (BP) onto the MSNTs. The resultant PA and BP sensors display high sensitivity for detection the Fe ions in tap water, river water, sea water, two units in simple cycle power station, and biological samples. More interestingly, upon meeting ultra-trace amount of Fe ions, a red complex appears at once. Color changes can be seen from the naked eye and tracked with a smartphone or spectrophotometric techniques. The response time that is necessary to achieve a stable signal was less than 15 s. The Univariate (Univar) calibration technique had been utilized for the determination of figures of merits. The detection limit obtained from the digital image analysis was 19 ppb (7.04 × 10 M) for Fe ions, while the obtained from the spectrophotometric method was 6.7 ppb (2.48 × 10 M). Therefore, the two sensors had been successfully used in the determination of Fe in several real samples with high sensitivity and selectivity. In addition, they can be used as a simple, rapid, and portable method to detect and quantify the pre rust in any cooler system.
基于介孔硅纳米管（MSNTs）的化学传感器已被制备用于快速检测和选择性识别高浓度 Fe 离子。新型纳米传感器是通过将 1,10-菲啰啉-5-胺（PA）和邻菲啰啉（BP）固定在 MSNTs 上来制备的。所得的 PA 和 BP 传感器对自来水中、河水中、海水中、两个简单循环发电站单元和生物样品中的 Fe 离子的检测具有高灵敏度。更有趣的是，当遇到痕量的 Fe 离子时，立即出现红色络合物。可以用肉眼观察到颜色变化，并通过智能手机或分光光度技术进行跟踪。达到稳定信号所需的响应时间小于 15 s。单变量（Univar）校准技术已用于确定优点。从数字图像分析获得的检测限为 19 ppb（7.04×10 -6 M），用于 Fe 离子，而从分光光度法获得的检测限为 6.7 ppb（2.48×10 -6 M）。因此，这两种传感器已成功用于几种实际样品中 Fe 的高灵敏度和选择性测定。此外，它们可用于检测和定量任何冷却系统中预生锈的简单、快速和便携式方法。
