In situ growth of Ag-SnO2 quantum dots on silver phosphate for photocatalytic degradation of carbamazepine: Performance, mechanism and intermediates toxicity assessment.

摘要: Abstract The occurrence of carbamazepine (CBZ) in environments poses a potential risk to aquatic life and exhibits growth inhibition human embryonic cells. In this work, for the first time series Ag-SnO2 quantum dots (QDs)/silver phosphate (AgSn/AgP) composites were synthesized used as photocatalysts CBZ degradation. obtained AgSn/AgP showed superior photodegradation efficiency removal. degradation rate constant 10AgSn/AgP (with 10 wt% QDs) was almost 8.5, 5.7, 1.9 times that QDs, Ag3PO4, Ag/Ag3PO4, SnO2 QDs/Ag3PO4, respectively. improved photocatalytic activity could be primarily ascribed charge separation through collaborative effect QDs situ photoreduced metallic silver. Electron spin resonance (ESR) measurement radical trapping experiments suggested holes (h+), (superoxide radical) ·O2− (hydroxyl radical) ·OH corporately participated decomposition CBZ. Moreover, reasonable mechanism over tentatively proposed. Additionally, eight intermediates determined by liquid chromatography-mass spectrometry (LC-MS). Toxicity evaluation using Ecological Structure Activity Relationships (ECOSAR) program revealed toxicity most much lower than parent compound This work not only provides new technique preparing Ag3PO4-based with high activity, but also demonstrates promising photocatalyst treating water wastewaters containing