Facile Fabrication of CuO Nanosheets and In Situ Transmission Electron Microscopy/X‐Ray Diffraction Heating Characterization of Microstructure Evolution. Issue 6 (19th January 2022)

• Record Type: Journal Article
• Authors: Yang, Baoshuo; Ai, Yuan
• Is Part Of: Physica status solidi. Volume 219:Issue 6(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-01-19
• Subjects: CuO nanosheets -- in situ TEM heating -- in situ XRD heating -- microscopy -- microstructure evolution; Solid state physics -- Periodicals; Solids -- Industrial applications -- Periodicals; 530.41
• DOI: 10.1002/pssa.202100617
• Languages: English
• ISSNs: 1862-6300

Abstract

Abstract : CuO nanosheets (NSs) are synthesized by a one‐step template‐free solution method. The thermal characteristics are further accounted for by studying the morphological and structural evolution at different temperatures. The initial morphology and structure of the prepared CuO NSs are explored by scanning electron microscopy, energy dispersive spectrometer (EDS), transmission electron microscopy (TEM), selected area electron diffraction (SAED), and X‐ray diffraction (XRD). These results confirm the advantages of smooth surface, and uniform and good crystalline array structure with a thickness of several tens of nanometers. During thermal analysis, in situ TEM heating is conducted from room temperature to 1120 °C, accompanied by the appearance and evolution of porous membrane areas and fusion areas. The changing process of shrinking and final disappearance is studied by in‐depth and detailed research. At the same time, in situ XRD heating from room temperature to 1100 °C and EDS analysis at 1020 °C provide auxiliary analysis of phase transition from CuO to Cu2 O during in situ TEM heating. Abstract : Monodisperse CuO nanosheets (NSs) are synthesized by a one‐step template‐free process. Products possess 2D structures with smooth surface and thickness of tens of nanometers. In situ TEM/XRD heating and energy dispersive spectrometer (EDS) are used for in‐depth exploration of the evolution of the morphology, structure, and composition at various temperatures. Formation and disappearance of porous CuO NSs and appearance of Cu2 O are discovered.