Mane Padmaja V, Patil Pravin, Mahishi Anusha A, Kigga Madhuprasad, Bhat Mahesh P, Lee Kyeong-Hwan, Kurkuri Mahaveer
Centre for Research in Functional Materials (CRFM), JAIN (Deemed-to-be University), Jain Global Campus, Bengaluru 562112, Karnataka, India.
Post-Graduate Department of Studies and Research in Chemistry, K. L. E. Society's, P. C. Jabin Science College, Vidyanagar 580031, Hubballi, Karnataka, India.
Heliyon. 2023 May 30;9(6):e16600. doi: 10.1016/j.heliyon.2023.e16600. eCollection 2023 Jun.
A rhodamine-derived receptor was synthesized and comprehensively characterized for structural confirmation. The receptor was able to distinguish the copper ions (Cu) from other competing cations. The yellow color of the receptor changed to pink upon adding Cu ions, however, other competing cations ions were impotent towards any color variation. The UV-visible titration studies revealed the binding stoichiometry of a 1:1 ratio with a detection limit of 9.663 × 10 M. Additionally, a novel idea of the work resides in the use of diatom for the practical application, where the receptor has been tethered on nanoporous diatomaceous earth microparticles (P2D) to remove Cu ions. The results confirmed that 50 mg receptor functionalized DE could adsorb 10 mL of 1 ppm Cu ions from water. Furthermore, a proof-of-concept device that is inexpensive, simple to operate, and continuously removes Cu ions from water has been developed. The efficiency of the device in Cu ion removal could be realized through the naked eye by observing the color change of P2D particles, which has excellent potential for application in remote locations where water contamination is a significant issue.
合成了一种罗丹明衍生的受体，并对其进行了全面表征以确认结构。该受体能够区分铜离子（Cu）与其他竞争性阳离子。加入铜离子后，受体的黄色变为粉红色，然而，其他竞争性阳离子对任何颜色变化均无作用。紫外-可见滴定研究表明其结合化学计量比为1:1，检测限为9.663×10⁻⁶ M。此外，这项工作的一个新颖之处在于将该受体固定在纳米多孔硅藻土微粒（P2D）上用于实际应用以去除铜离子。结果证实，50 mg受体功能化的硅藻土能够从水中吸附10 mL 1 ppm的铜离子。此外，还开发了一种概念验证装置，该装置价格低廉、操作简单，能够持续从水中去除铜离子。通过观察P2D颗粒的颜色变化，肉眼即可实现该装置去除铜离子的效率，这在水污染是一个重大问题的偏远地区具有极好的应用潜力。
