Highly Luminescent Mesoporous Zn2TiO4:Eu3+ Material with Excellent Sensing and Removal Abilities for Heavy-Metal Ions

摘要

A novel fluorescent sensor system for environmental use was designed based on a luminescent mesoporous Eu-doped pure cubic-phase Zn2TiO4 material, which is fabricated by the evaporation-induced self-assembly method using Pluronic P123 as structure directing agents. It has a large specific surface area and relatively narrow pore size distribution. Importantly, it shows high luminescent performance, excellent luminescent sensing performance and the intrinsic selectivity for Cu2+ ions. What's more, it can be reused and show the stimuli-responsive controlled release behavior after adding into nitric acid. In addition, the Zn2TiO4:Eu3+ material with the internal quantum efficiency of 74.3%, has been used in a facile microfluidic device to detect and remove the heavy-metal ions.