Interpenetrating porous photonic crystal balls for rapid naked eye detection of uranyl ions. Issue 15 (13th July 2022)

• Record Type: Journal Article
• Authors: Liu, Bing; Li, Letian; Liu, Wenzhao; Chen, Qianshan; Wu, Zhaoyang
• Is Part Of: Analyst. Volume 147:Issue 15(2022)
• Page Start: 3585
• Page End: 3592
• Publication Date: 2022-07-13
• Subjects: Chemistry, Analytic -- Periodicals; 543
• DOI: 10.1039/d2an00839d
• Languages: English
• ISSNs: 0003-2654

Abstract

Abstract : We developed a label-free interpenetrating porous photonic crystal ball sensor with amidoxime groups and carboxyl groups by two-step activation for rapid detection of UO2 2+ with the naked eye without an angle dependence. Abstract : There is an increasing need to develop simple yet effective sensors with high sensitivity, high selectivity, rapid response, and low cost for on-site detection of UO2 2+ in the environment in planned or emergency situations. Herein, we develop a UO2 2+ responsive interpenetrating porous photonic crystal ball (IPPCB) sensor by template replication and a two-step activation method. The amidoxime group and carboxyl group in the hydrogel drive the shrinkage of the hydrogel network through the coordination with UO2 2+, which reduces the lattice spacing, thereby changing the structure color and shifting the reflection peak position. Therefore, we can perform a semi-quantitative analysis of UO2 2+ with the naked eye or a fiber spectrometer. Benefiting from the sensor's spherical symmetry and periodic interpenetrating porous structure, the sensor can provide angle-independent, fast (12 min), and sensitive (minimum detection concentration of 1 nM) detection of UO2 2+ . Moreover, IPPCBs have high selectivity and excellent regeneration performance, which can be applied to real sample detection.