The Identification of Cu–O–C Bond in Cu/MWCNTs Hybrid Nanocomposite by XPS and NEXAFS Spectroscopy

Nanomaterials

Alexander S. Vinogradov¹  Danil V. Sivkov¹  Boris S. Kaverin²  Ilya V. Vilkov²  Anatoly M. Ob’edkov²  Roman I. Korolev³  Roman N. Skandakov⁴  Sergey I. Isaenko⁴  Olga V. Petrova⁴  Viktor N. Sivkov⁴  Sergey V. Nekipelov⁴ 

[1] Federal State Budgetary Educational Institution of Higher Education, Saint-Petersburg State University, 199034 St. Petersburg, Russia;G.A. Razuvaev Institute of Organometallic Chemistry of the Russian Academy of Sciences, 603950 Nizhny Novgorod, Russia;Institute of Exact Sciences and Information Technologies, Pitirim Sorokin Syktyvkar State University, 167001 Syktyvkar, Russia;Komi Science Centre of the Ural Branch of the Russian Academy of Sciences, 167982 Syktyvkar, Russia;

关键词: XPS;    NEXAFS;    Raman shift;    Cu–O–C bonding;    MWCNT;    Cu/MWCNTs;   

DOI  :  10.3390/nano11112993

来源: DOAJ

【 摘 要 】

The results of the research of a composite based on multi-walled carbon nanotubes (MWCNTs) decorated with CuO/Cu₂O/Cu nanoparticles deposited by the cupric formate pyrolysis are discussed. The study used a complementary set of methods, including scanning and transmission electron microscopy, X-ray diffractometry, Raman, and ultrasoft X-ray spectroscopy. The investigation results show the good adhesion between the copper nanoparticles coating and the MWCNT surface through the oxygen atom bridge formation between the carbon atoms of the MWCNT outer graphene layer and the oxygen atoms of CuO and Cu₂O oxides. The formation of the Cu–O–C bond between the coating layer and the outer nanotube surface is clearly confirmed by the results of the O 1s near edge X-ray absorption fine structure (NEXAFS) and X-ray photoelectron spectroscopy (XPS) of the Cu/MWCNTs nanocomposite. The XPS measurements were performed using a laboratory spectrometer with sample charge compensation, and the NEXAFS studies were carried out using the synchrotron radiation of the Russian–German dipole beamline at BESSY-II (Berlin, Germany) and the NanoPES station at the Kurchatov Center for Synchrotron Radiation and Nanotechnology (Moscow, Russia).

【 授权许可】

Unknown