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Abstract
Photocatalytic degradation by visible-light responsive photocatalysts is an efficient strategy to treat organic dye pollutants and monitoring of the photocatalytic reaction mechanisms and kinetics is important to the design of high-performance photocatalysts. Herein, a dual-functional graphitic carbon nitride/gold nanoparticles (g-C3N4/AuNPs) nanocomposite film is introduced to monitor the photocatalytic reactions by surface-enhanced Raman scattering (SERS) while degrading organic dyes photocatalytically. The nanocomposite film fabricated by two-step interfacial self-assembly consists of orderly arranged g-C3N4 film anchored on a closely packed AuNPs monolayer film. The nanoplatform has excellent SERS characteristics such as a rhodamine 6G (R6G) detection limit of 8.8 × 10−10 M, and good SERS detection uniformity with a relative standard deviation (RSD) of 9.62%, which is crucial to quantitative determination and accurate monitoring of the photocatalytic reactions. The nanoplatform is employed in visible-light photocatalytic degradation of organic dyes including R6G, methylene blue, acid orange II, and acid orange 74. The reactions follow the pseudo-first-order kinetics as revealed by SERS and the photocatalytic degradation mechanism is postulated to be the promoted charge separation. The results reveal a high-performance dual-functional nanoplatform suitable for visible-light photocatalytic degradation of organic dye pollutants and SERS monitoring of the reactions. © 2023 Elsevier B.V.
Original language | English |
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Article number | 102808 |
Journal | Surfaces and Interfaces |
Volume | 38 |
Online published | 16 Mar 2023 |
DOIs | |
Publication status | Published - Jun 2023 |
Research Keywords
- Monitoring
- Organic dyes pollutants
- Photocatalytic degradation
- Self-assembled nanocomposites
- SERS
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DON_RMG: Fabrication, Characterization, and Properties of Functional Materials - RMGS
CHU, P. K. H. (Principal Investigator / Project Coordinator)
1/01/20 → …
Project: Research