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Smart Photonic Crystal Hydrogel Material for Uranyl Ion Monitoring and Removal in Water
Author(s) -
Xiao Fubing,
Sun Yongfang,
Du Wenfang,
Shi Wenhui,
Wu Yan,
Liao Shuzhen,
Wu Zhaoyang,
Yu Ruqin
Publication year - 2017
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201702147
Subject(s) - uranyl , adsorption , materials science , self healing hydrogels , naked eye , ligand (biochemistry) , photonic crystal , ion , crystal (programming language) , chemical engineering , uranium , detection limit , chemistry , optoelectronics , chromatography , organic chemistry , metallurgy , computer science , polymer chemistry , engineering , biochemistry , receptor , programming language
Uranyl ion (UO 2 2+ ) pollution is a serious environmental problem, and developing novel adsorption materials is essential for UO 2 2+ monitoring and removal. Although some progress is achieved, it is still a challenging task to develop an adsorption material with indicating signal for real‐time evaluation of the adsorption degree and the UO 2 2+ concentration. Herein, this paper describes a smart photonic crystal hydrogel (PCH) material, which not only can be used for real‐time monitoring function but also can be utilized for UO 2 2+ removal based on the chelation of UO 2 2+ with ligand groups in PCH material. The working principle is based on the binding of a uranyl ion to multiple ligand groups, which results in the shrinkage of PCH material and triggers a blue‐shift of diffraction wavelength. Consequently, the adsorption degree and the UO 2 2+ concentration can be sensitively evaluated by measuring the diffraction shift or observing the color change with naked eye. With this PCH material, the lowest detectable concentration for UO 2 2+ is 10 × 10 −9 m , and the maximum adsorption capacity at 298 K is 169.67 mmol kg −1 . In addition, this material also holds good selectivity and regeneration feature, and shows desirable performance for UO 2 2+ analysis in real water samples.