Moghaddasfar Amin, Ziarani Ghodsi Mohammadi, Badiei Alireza
School of Chemistry, College of Sciences, University of Tehran Iran
Department of Organic Chemistry, Faculty of Chemistry, Alzahra University Iran.
RSC Adv. 2025 May 15;15(20):16164-16174. doi: 10.1039/d5ra01728a. eCollection 2025 May 12.
Upcycling waste materials to produce high-value-added substances can pave the way for sustainable development. Waste block dental powders (WBDPs), a valuable source of zirconia, represent a significant portion of dentistry wastage and are valuable candidates for upcycling. Herein, a highly selective and facile optical probe based on upcycled WBDPs with surface interaction of 8-hydroxyquinoline-5-sulfonate (8-HQS) was developed to produce a powerful solid-state optical chemo-probe for sensing Zn and Hg in aqueous media. ZrO-8-HQS provided high selectivity for sensing Zn over a wide range of cations and anions, with a remarkable fluorescence intensity enhancement ( = 517 nm) over a wide pH range (4-10). The as-prepared optical probe had a remarkable sensitivity, with a limit of detection (LoD) of 5.2 μM for Zn. The fluorescence of the Zn probe complex was quenched in the presence of aqueous solutions of Hg, allowing the as-prepared chemo-probe to sense Hg in aqueous media (LoD of 0.8 μM for Hg). The Stern-Volmer equation revealed static and dynamic mechanisms in the quenching process, and the ( × ) and ( + ) values were 0.0012 and 0.0076, respectively.
将废料升级再利用以生产高附加值物质可为可持续发展铺平道路。废块状牙科粉末（WBDPs）是氧化锆的宝贵来源，占牙科废料的很大一部分，是升级再利用的理想候选材料。在此，基于经升级再利用的WBDPs与8-羟基喹啉-5-磺酸盐（8-HQS）的表面相互作用，开发了一种高选择性且简便的光学探针，以制备一种用于检测水介质中锌和汞的强大固态光学化学探针。ZrO-8-HQS在多种阳离子和阴离子范围内对锌的检测具有高选择性，在较宽的pH范围（4-10）内荧光强度显著增强（λem = 517 nm）。所制备的光学探针具有显著的灵敏度，对锌的检测限（LoD）为5.2 μM。在汞的水溶液存在下，锌探针络合物的荧光被猝灭，使得所制备的化学探针能够检测水介质中的汞（汞的LoD为0.8 μM）。斯特恩-沃尔默方程揭示了猝灭过程中的静态和动态机制，（KSV×τ0）和（KSV + kq）值分别为0.0012和0.0076。
