期刊
SURFACE SCIENCE SPECTRA
卷 29, 期 2, 页码 -出版社
AIP Publishing
DOI: 10.1116/6.0002028
关键词
g-C3N4; Au; Ag; Au-Ag; electrophoresis; RF-sputtering; x-ray photoelectron spectroscopy
资金
- National Council of Research
- Padova University [DOR 2020-2022, 04BIRD2020-UNIPD EUREKA]
- AMGA Foundation (NYMPHEA project)
- INSTM Consortium [INSTM21PDBARMAC-ATENA, INSTM21PDGASPAROTTO-NANOMAT]
In this study, the surface composition and elemental chemical states of graphitic carbon nitride (g-C3N4) materials decorated with highly dispersed noble metals were characterized using X-ray photoelectron spectroscopy. The results showed an intimate contact between the introduced noble metals and the underlying g-C3N4 matrix, resulting in functionalized structures of highly defective carbon nitride matrices.
In the present contribution, x-ray photoelectron spectroscopy was used to characterize the surface composition and elemental chemical states of graphitic carbon nitride (g-C3N4) materials decorated with highly dispersed noble metals (Au, Ag, or Au + Ag). Samples were prepared through electrophoretic deposition of g-C3N4 on fluorine-doped tin oxide substrates and annealed at 500 ? in Ar. The resulting systems were subsequently functionalized by radio frequency-sputtering and finally annealed again under an Ar atmosphere. Material's structural and morphological characterization revealed an intimate contact of the introduced noble metals with the underlying g-C3N4 matrix. Survey spectra as well as detailed scans for C 1s, N 1s, O 1s, Au 4f, Ag 3d, and Sn 3d regions are presented and critically discussed. The obtained results evidence the presence of highly defective carbon nitride matrices functionalized by low-sized Au nanoaggregates, atomically dispersed Ag, or partially alloyed Au-Ag core/shell nanoparticles.
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