Magnetic mesoporous nanomaterials with AIE properties for selective detection and removal of CN from water under magnetic conditions.

We have prepared a type of magnetic mesoporous nanomaterial with aggregation-induced emission properties (FeO@mSiO@TPA@BA, hence abbr. FSTB) to detect and remove cyanide ions (CN) under magnetic conditions. FSTB has a large specific surface area and improved fluorescence performance to identify CN, and its superparamagnetic behavior plays an important role in removing CN. The magnetic sensor FSTB shows excellent selectivity and anti-interference for the detection of CN in aqueous solutions. It is obvious from the equation LOD = 3/ that the limit of detection (LOD) of FSTB for CN is significantly lower than the permissible level of CN in drinkable water recommended by the World Health Organization. Therefore, the magnetic sensor FSTB has a wide range of applications for detecting and removing harmful CN.