SERS monitoring of methylene blue degradation by Au-Ag@Cu2O-rGO nanocomposite

Lei Chen; Shuang Guo; Shuhan Di; Eungyeong Park; Hongkai Zhao; Young Mee Jung

doi:10.1016/j.saa.2024.124354

SERS monitoring of methylene blue degradation by Au-Ag@Cu₂O-rGO nanocomposite

Spectrochim Acta A Mol Biomol Spectrosc. 2024 Aug 5:316:124354. doi: 10.1016/j.saa.2024.124354. Epub 2024 Apr 26.

Authors

Lei Chen¹, Shuang Guo², Shuhan Di³, Eungyeong Park⁴, Hongkai Zhao⁵, Young Mee Jung⁶

Affiliations

¹ School of Materials Science and Engineering, Jilin Jianzhu University, Changchun 130118, China.
² Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon 24341, Republic of Korea.
³ College of Chemistry, Jilin Normal University, Siping, Jilin 136000, China.
⁴ Kangwon Radiation Convergence Research Support Center, Kangwon National University, Chuncheon 24341, Republic of Korea.
⁵ School of Materials Science and Engineering, Jilin Jianzhu University, Changchun 130118, China. Electronic address: hkzhao003@126.com.
⁶ Department of Chemistry, Institute for Molecular Science and Fusion Technology, Kangwon National University, Chuncheon 24341, Republic of Korea; Kangwon Radiation Convergence Research Support Center, Kangwon National University, Chuncheon 24341, Republic of Korea. Electronic address: ymjung@kangwon.ac.kr.

PMID: 38678842
DOI: 10.1016/j.saa.2024.124354

Abstract

A combination of multiple materials effectively improves and enhances the performance of the materials. Thus, a gold-silver@cuprous oxide (Au-Ag@Cu₂O)-reduced graphene oxide (rGO) structure was designed and fabricated. We decorated the Au nanoparticles (NPs) on the Ag@Cu₂O-rGO composite surface by a redox reaction to form a Au-Ag@Cu₂O-rGO structure with two noble metals attached to a Cu₂O semiconductor. A comparable Au-Ag@Cu₂O structure was also fabricated. After decorating Au NPs into the Ag@Cu₂O-rGO composite, the Au-Ag@Cu₂O composite structure was loosened, and the surface and interior of the Cu₂O shell were decorated with Au and Ag NPs. Moreover, the addition of Au NPs resulted in a proper surface plasmon resonance effect and a significant broadening of the absorption range. The loose structure increased the adsorption of the probe molecules, which increased the surface-enhanced Raman scattering (SERS) intensity. In addition, the fabricated Au-Ag@Cu₂O-rGO exhibited excellent catalytic reduction of methylene blue (MB) with sodium borohydride (NaBH₄). Therefore, the SERS-based monitoring of the MB degradation was obviously improved.

Keywords: Au-Ag@Cu(2)O-rGO; Charge transfer; Degradation; Methylene blue; Nanocomposite; SERS.