A high toughness hydrogel with Dy3+ enhanced fluorescence properties: For visual Zn2+ detection

Rapid, portable, and sensitive detection of Zn 2+ is crucial for human health. In this study, SA/PEG/Ln fluorescent hydrogels were synthesized via in situ polymerization with lanthanide metals (Tb 3+ /Dy 3+ ) and PAM. The results demonstrated a significant improvement in mechanical properties (132.8 % increase in compressive properties) after rare earth doping. The addition of Dy 3+ enhanced the fluorescence properties of the singly doped Tb 3+ fluorescent hydrogel (maximum luminous intensity increased by 1900 cd). Monitoring changes in fluorescence intensity enabled the realization of Zn 2+ detection, allowing for quick and accurate determination of zinc ion presence. Visual monitoring of Zn 2+ was achieved with the assistance of a portable ultraviolet lamp.