4.6 Article

3D Ag/ZnO microsphere SERS substrate with ultra-sensitive, recyclable and self-cleaning performances: application for rapid in site monitoring catalytic dye degradation and insight into the mechanism

出版社

ELSEVIER
DOI: 10.1016/j.colsurfa.2020.125507

关键词

SERS substrate; recyclable and self-cleaning performance; in situ monitoring; photocatalytic degradation; organic pollutant removal

资金

  1. National Natural Science Foundation of China [61575225, 11074312, 11374377, 11474174, 11404414]
  2. Fujian Key Laboratory of Functional Marine Sensing Materials, Minjiang University
  3. MJUKF-FMSM [201912]
  4. Undergraduate Research Training Program of Minzu University of China [URTP 2018110045, URTP 2018110046, URTP 2018110028]

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A highly sensitive, recyclable and self-cleaning surface-enhanced Raman scattering (SERS) substrate for rapid in situ monitoring photocatalytic degradation of dyes has been fabricated by growing Ag nanoparticles (NPs) on three-dimensional (3D) nanosheet-built ZnO microspheres (MSs). Used as a SERS substrate for the detection of Rhodamine 6 G (R6 G) molecules, the fabricated 3D Ag/ZnO MSs display high sensitivity and reproducibility as well as outstanding self-cleaning ability. The 3D Ag/ZnO MSs can detect the SERS signals of R6 G molecules even at very low concentration of 10(-9) M. In the light of these outstanding performances, the 3D Ag/ZnO MSs were employed as a SERS-active substrate for rapid in situ monitoring photocatalytic degradation of R6 G molecules. The experimental results distinctively demonstrate that the enhanced photocatalytic degradation of R6 G molecules is attributed to the efficient plasmon-induced charge transfer at the interface of the Ag NPs, ZnO MSs and R6 G molecules. The as-prepared 3D Ag/ZnO MSs display potential applications for as a multifunctional platform to rapid in situ monitoring photocatalytic degradation of organic pollutants in polluted water.

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