A ratiometric fluorescent hydrogel of controlled thickness prepared continuously using microtomy for the detection and removal of Hg(II)

• A rhodamine-based CDs (CDs-Rho) ratiometric nanosensor was fabricated. CDs-Rho displayed a selective, sensitive and low limit detection towards Hg 2+ . Cellulose hydrogel slices with (CCR) were continuously prepared by microtomy. CCR showed over 95% uptake efficiency good ability for The purified water after treated exhibited biocompatibility. Mercury ions are one of the most toxic heavy metals as such they can cause serious risk to human body environmental ecosystem. To effectively detect remove from contaminated water, new cellulose-based fluorescent has been fabricated using probe carbon dots energy donor rhodamine moiety acceptor (CDs-Rho). exhibits linear response wide range 0–100 ?M 2.19 × 10 ?9 M high selectivity other cations. In addition, series containing microtomy hydrogel, facilitating large-scale fabrication functionalized controlled thickness. sensitivity excellent adsorption capacity ~95% removal efficiency, meeting requirements sewage discharge. Moreover, is successfully used cell culture animal growth, demonstrating Our approach expected offer novel concept construction biocompatible hydrogels various metal simply swapping current suitable replacements variety relevant applications.