Abstract
Aimed at obtaining a new type of bi-functional materials for highly efficient surface enhanced Raman spectroscopy (SERS) detection and photocatalytic degradation of organic pollutants, a low content of Ag nanoparticles (0.5 wt. % Ag) anchored flower-like 2-methylimidazole zinc metal organic frameworks (ZIF-8) induced by TiO2/Zn sheet was facilely constructed without adding any reductants or UV-light reduction. With p-aminothiophenol (PATP, a typical pesticide) as an analyte, SERS and photocatalytic degradation performances of the resulting Zn/TiO2/ZIF-8/Ag (Zn-TZA) sheet were evaluated. The cost-effective Zn-TZA sheet exhibited high SERS activity and excellent stability towards PATP detection, and its detection limit can reach 1 × 10-11 M. In addition, the Zn-TZA sheet showed high and stable photocatalytic performance for PATP degradation. In particularly, by means of the plug and play Zn-TZA, the detection and degradation of PATP in real samples can also be effectively achieved. The strong coupling and electron transfer among Ag NPs, TiO2/Zn, and ZIF-8 in the Zn-TZA sheet were very advantageous to enhancing the bi-functionality. Additionally, the increased enrichment of PATP on the special sheet was also an important factor for the enhanced bi-functionality. It will provide new ideas for designing competitive bi-functional materials that are used to detect and degrade organic poisons in waste water.
Published Version
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