Nanobiotechnology Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu, India.
Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
Spectrochim Acta A Mol Biomol Spectrosc. 2021 Dec 15;263:120204. doi: 10.1016/j.saa.2021.120204. Epub 2021 Jul 23.
Recent trends in nanotechnology paved a way for the development of detection systems for heavy metals, toxins and environmental pollutants. The present study focused on Hg detection by a core shell Fe@Ag-starch nanosphere phenylalanine conjugate. The characterization of core shell Fe@Ag-starch nanosphere was performed by using TEM, zetasizer, particlesize analyzer, UV-visible absorption spectrophotometer, EDAX, FTIR and TGA. The NPs showed λmax at 408 nm. The effective diameter of synthesized nanosphere was 37 ± 2 nm and it possessed the surfaces charge of -36.12 ± 2.5 mV. The Fe@Ag-starch-phenylalanine conjugate reacted with Hg, the yellow colour of the nanosphere phenylalanine conjugate became colourless. The real water sample was collected and the amount of Hg was calculated by using the prepared nanosphere. The detection of Hg at different conditions including various saline concentrations, temperature and pH were also studied and the detection was found to be effective at 40 °C, pH 5 and 0.1% of saline concentration. The LOD of Hg ions by Fe@Ag-starch nanosphere were calculated to be 1.84 nM. The influence of other metal ions present in the analyte did not show any interference on Hg detection. In addition, the photocatalytic and antibacterial activities of Fe@Ag-starch nanosphere were also studied. The study confirmed that the core shell nanosphere can also be used for environmental cleanup and disinfection.
近年来，纳米技术的发展为重金属、毒素和环境污染物的检测系统的开发铺平了道路。本研究专注于通过核壳 Fe@Ag-淀粉纳米球苯丙氨酸缀合物检测 Hg。通过 TEM、Zetasizer、粒度分析仪、紫外可见吸收分光光度计、EDAX、FTIR 和 TGA 对核壳 Fe@Ag-淀粉纳米球进行了表征。NPs 在 408nm 处显示出 λmax。合成纳米球的有效直径为 37±2nm，表面带负电荷为-36.12±2.5mV。Fe@Ag-淀粉-苯丙氨酸缀合物与 Hg 反应，纳米球苯丙氨酸缀合物的黄色变为无色。采集实际水样，并使用制备的纳米球计算 Hg 的含量。还研究了不同条件下（包括不同盐浓度、温度和 pH 值）对 Hg 的检测，发现 40°C、pH5 和 0.1%盐浓度下的检测效果较好。Fe@Ag-淀粉纳米球对 Hg 离子的检测限计算为 1.84nM。分析物中存在的其他金属离子没有对 Hg 检测产生任何干扰。此外，还研究了 Fe@Ag-淀粉纳米球的光催化和抗菌活性。研究证实，核壳纳米球也可用于环境清理和消毒。
