Citation: Huihui LIU, Baichuan ZHAO, Tingting ZHANG, Chuanhui WANG, Zhi WANG, Congyun ZHANG. High-sensitivity surface-enhanced Raman scattering detection and self-cleaning performance of organic pollutants based on a filter membrane sandwich structure[J]. Chinese Journal of Inorganic Chemistry, ;2026, 42(6): 1299-1311. doi: 10.11862/CJIC.20260362 shu

High-sensitivity surface-enhanced Raman scattering detection and self-cleaning performance of organic pollutants based on a filter membrane sandwich structure

1.
School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
2.
School of Environment and Geography, Qingdao University, Qingdao, Shandong 266071, China
3.
Linyi Customs, Linyi, Shandong 276023, China

Corresponding author: Zhi WANG, shikouri@163.com Congyun ZHANG, zhangcy@qdu.edu.cn
Received Date: 4 December 2025
Revised Date: 20 April 2026

Figures(7)

A highly sensitive surface-enhanced Raman scattering (SERS) substrate was constructed, which was a Cu₂O-GO-AuNSts sandwich heterostructure assembled on a filter membrane, with ultrathin graphene oxide (GO) precisely embedded between the thorn-like Cu₂O microcrystals and gold nanostars (AuNSts). This heterostructure achieved strong electromagnetic enhancement and rapid photogenerated charge transfer by synergistically coupling broadband light absorption, efficient molecular enrichment, and abundant plasma "hotspots". Using rhodamine 6G (R6G) as probe molecules, the substrate achieved an ultra-low detection limit of 10^-13 mol·L^-1, demonstrating superior SERS sensitivity. More importantly, the heterostructure concurrently exhibited significant photocatalytic performance, thereby endowing the substrate with self-cleaning functionality. Even for the highly stable and recalcitrant persistent organic pollutant (POP), 2, 2′, 4, 4′-tetrabromodiphenyl ether (BDE-47), the characteristic SERS fingerprint could be clearly identified at a concentration as low as 10^-7 mol·L^-1. UV-Vis spectroscopy analysis revealed a degradation efficiency of approximately 66% after 20 h of light irradiation. The excellent SERS property of the sandwich structure originates from the synergistic effect of local surface plasmon resonance (LSPR) effect attributed to AuNSts and the molecular enrichment effect of GO lamellae and filter membrane, while the photocatalytic activity originates from the photo-induced charge transfer mechanism within the structure.
- surface-enhanced Raman scattering,
- photocatalytic self-cleaning,
- persistent organic pollutant
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