Photocatalytic degradation and reusable SERS detection by Ag nanoparticles immobilized on g-C3N4/graphene oxide nanosheets

• Published in: Surface & coatings technology Vol. 435; p. 128212
• Main Authors: Peng, Guang-Zhi, Hardiansyah, Andri, Lin, Hsuan-Ting, Lee, Ruo-Yu, Kuo, Chih-Yu, Pu, Ying-Chih, Liu, Ting-Yu
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 15.04.2022; Elsevier BV
• Subjects: Adenine; Biomolecules; Carbon nitride; G-C3N4; Graphene; Graphene oxide nanosheets; Methylene blue; Nanoparticles; Nanosheets; Photocatalytic degradation; Photodegradation; Pollutants; Raman spectra; Raman spectroscopy; Silver; Substrates; Surface-enhanced Raman scattering (SERS) detection; Two dimensional materials; Surface-enhanced Raman scattering (SERS) detection; Photocatalytic degradation; G-C3N4; Graphene oxide nanosheets
• ISSN: 0257-8972; 1879-3347
• DOI: 10.1016/j.surfcoat.2022.128212

In this study, graphene oxide (GO) and a carbon 2D materials (g-C3N4 nanosheets) were combined to construct g-C3N4/GO nanosheets through π-π stacking interaction. Moreover, Ag+ ions were reduced to Ag nanoparticles and further grafted onto the g-C3N4/GO nanosheets (Ag@g-C3N4/GO) to impart the dual functionality of photocatalytic degradation and surface enhanced Raman scattering (SERS) detection. The Ag@g-C3N4/GO SERS substrate can be used to detect biomolecules (adenine) and organic pollutants (methylene blue). The X-ray diffraction, scanning electron microscopy, and Raman spectroscopy observations confirmed that g-C3N4 was successfully stacked onto the GO nanosheets. In addition, the Ag@g-C3N4/GO SERS substrate displayed photocatalytic ability. Pollutants in water were photodegraded by irradiation with visible light (405 nm), making the substrate self-cleaning and reusable. Thus, the Ag@g-C3N4/GO SERS nanosheets has potential for application in the photocatalytic degradation of water pollutants and detection of biomolecules. •Reusable SERS substrate was made by Ag/g-C3N4/graphene oxide nanosheets.•The water pollutants can be photodegraded by visible light (405 nm).•It can be recyclable use after photocatalytic degradation of water pollutants.