One particle three targets: Phosphate anion-modified magnetic mesoporous silica with enhanced fluorescence for sensitive detection, efficient adsorption, and repeated removal of uranium (VI) ions

被引：14

作者：

Zhang, Jian ^{[1
]}

Gao, Yue ^{[1
]}

Hou, Jinjin ^{[1
]}

Guo, Jing ^{[1
]}

Shao, Zhaoshuai ^{[1
]}

Ming, Yuanhang ^{[1
]}

He, Lifang ^{[1
]}

Chen, Qian ^{[1
]}

Wang, Suhua ^{[3
]}

Zhang, Kui ^{[1
]}

Zhang, Zhongping ^{[2
]}

机构：

[1] Anhui Univ Technol, Sch Chem & Chem Engn, Maanshan 243032, Anhui, Peoples R China

[2] Anhui Univ, Inst Phys Sci & Informat Technol, Hefei 230000, Anhui, Peoples R China

[3] Guangdong Univ Petrochem Technol, Coll Environm Sci & Engn, Maoming 525000, Guangdong, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2024年 / 465卷

基金：

中国国家自然科学基金;

关键词：

Magnetic mesoporous silica; Uranyl ions; Fluorescence enhancement; Adsorption; Repeatable extraction; URANYL-ION; U(VI); SHELL; CORE; NANOPARTICLES; MICROSPHERES; NANOSPHERES; SORPTION; SENSOR;

D O I：

10.1016/j.jhazmat.2023.133286

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

An ideal adsorbent material that combines the multiple capabilities of sensitive detection, efficient adsorption, and repeatable removal of uranium (U) from the environment remains a serious challenge. Herin, a general method was developed for synthesizing a series of phosphate anions (such as: PO43-, P2O74-,P3O105-and P6O18 6-) modified magnetic mesoporous silica nanoparticles (Fe3O4 @mSiO2-Zn2+ NPs). The mesoporous surfaces and abundant phosphate groups provide potential, powerful uranium-binding sites for capturing U(VI) ions. Especially, the optimum adsorption capacity of Fe3O4 @mSiO2-Zn2+/P3O10 5-NPs was as high as 885.90 mg & sdot;g  1 (298 K), which was higher than that of unmodified or other phosphate anions-modified Fe3O4 @mSiO2-Zn2+ NPs. Meanwhile, P3O105--binding sites and mesoporous surfaces also strongly restrict U(VI) ions' fluorescence vibrational inactivation, the adsorption results in rapid green fluorescence enhancement (within 180 s), and an ultra-low detection limit (4.5 nmol & sdot;L-1), which is well below the standard in drinking water of the World Health Organization (WHO). Furthermore, even after 5 cycles, the adsorbent still maintained their original adsorption capacity of 80.21% and displayed excellent selectivity for detecting and removing U(VI) from seawater. Based on these results, the Fe3O4 @mSiO2-Zn2+/P3O105-NPs seem to be a suitable multifunctional adsorbent for the detection, adsorption, and removal of U(VI) from environment.

引用

页数：12