Subppb level monitoring and UV degradation of triclosan pollutants using ZnO multipod and Ag nanocomposites

초록

A unique nanomaterial platform was developed for trace detection and efficient degradation of triclosan (TCS). A facile spectroscopic technique for surface-enhanced Raman scattering (SERS)-supported identification and ul-traviolet (UV) degradation of TCS using a SERS template based on silver spherical nanoparticle (AgNP)-modified ZnO multipods (ZnO@Ag) is reported. Core-shell composite materials of ZnO multipods with a dimension of around 3 mu m and AgNPs with an average diameter of-27 nm was designed not only as a substrate for TCS degradation up to-92% upon UV irradiation (lambda = 365 mm, 300 mu W/cm2) but also as a monitoring platform sensitive to TCS at a detection limit as low as 10-9 M (approximate to 0.3 ppb). Herein, the first investigation into ZnO@Ag bimetallic composites is established for both the SERS-based detection and UV-assisted degradation of envi-ronmental TCS pollutants. The calibration curve was estimated to be linear at R2 > 0.97. The validated tech-nology was successfully used to determine the antibacterial agent and TCS in distilled or river water. The advantages of the ZnO@Ag template are highlighted over conventional detection and excellent degradation.

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