Vocational School of Technical Sciences, Karamanoglu Mehmetbey University, 70200 Karaman, Türkiye.
Department of Chemistry, Kamil Ozdag Science Faculty, Karamanoglu Mehmetbey University, 70100 Karaman, Türkiye.
Sci Total Environ. 2022 Nov 1;845:157170. doi: 10.1016/j.scitotenv.2022.157170. Epub 2022 Jul 9.
In this paper, we successfully synthesized a fluorescent hybrid material (f-Silica gel) for the removal and recognition of cations. A Bodipy derivative was used as a source of fluorescent material. The characterization of Bodipy derivative and the modified surfaces were performed by some techniques like NMR, XRD, SEM, and FT-IR. The spectroscopic studies (complex stoichiometry, pH effect, response time) were carried out with fluorescence spectroscopy for the sensitive and selective recognition of Cu (II) ions. The LOD (limit of detection) was calculated as 4.63 μM and the most optimum response time was determined as 25 min. Moreover, the complex interaction between f-Silica gel and Cu (II) ions stables generally in the range of pH: 1-12. f-Silica gel can be also used as a solid support surface to remove Cu (II) ions from the wastewater. The adsorption kinetics and isotherms of Cu (II) on the f-Silica gel were determined with several parameters such as the amount of adsorbent, temperature, and pH. Langmuir adsorption isotherm model was performed for the adsorption of Cu (II) ions and the maximum capacity was found to be 19. 920 mg/g. The kinetic data ensured that the R value was obtained as 0.9941 from the kinetic model (pseudo-second-order). Thus, it is very close to the desired value (1) and the value of q is very close to the value of q. The thermodynamic results support the spontaneous, random, and endothermic adsorption process. All results indicated that the hybrid material can be used as both a sensor and an adsorbent for the detection and removal of Cu (II) ions in environmental processes.
在本文中，我们成功合成了一种用于去除和识别阳离子的荧光杂化材料（f-硅胶）。使用Bodipy 衍生物作为荧光材料的来源。通过 NMR、XRD、SEM 和 FT-IR 等技术对 Bodipy 衍生物和修饰表面进行了表征。通过荧光光谱法进行了光谱研究（络合化学计量比、pH 效应、响应时间），以实现对 Cu（II）离子的灵敏和选择性识别。LOD（检测限）计算为 4.63 μM，最佳响应时间确定为 25 min。此外，f-硅胶与 Cu（II）离子之间的复杂相互作用通常在 pH 值为 1-12 的范围内稳定。f-硅胶还可以用作从废水中去除 Cu（II）离子的固体支撑表面。通过吸附剂的量、温度和 pH 等几个参数确定了 Cu（II）在 f-硅胶上的吸附动力学和等温线。Langmuir 吸附等温线模型用于吸附 Cu（II）离子，最大容量为 19.920 mg/g。动力学数据确保从动力学模型（准二级）获得 R 值为 0.9941。因此，它非常接近所需值（1），并且 q 值非常接近 q 值。热力学结果支持自发、随机和吸热吸附过程。所有结果表明，该杂化材料可作为传感器和吸附剂用于检测和去除环境过程中的 Cu（II）离子。
