Facile synthesis and characterization of hierarchical CuO nanoarchitectures by a simple solution route

Abstract

The controlled synthesis of hierarchical CuO nanomaterials in a solution phase has been realized with high yield at low temperature using copper acetate hydrate and NaOH as starting materials with the assistance of surfactant under hydrothermal conditions. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and ultraviolet-visible spectroscopy (UV-Vis) were used to characterize the products. It was shown that the hierarchical CuO nanoarchitectures were formed through aggregation of tiny single-crystal CuO nanorods. Experiments demonstrated that the morphology of CuO products was significantly influenced by hydrothermal temperature and reaction time. A rational growth mechanism based on oriented attachment was proposed for the selective formation of the hierarchical CuO nanoarchitectures. Our work demonstrated the growth of hierarchical CuO nanoarchitectures built from onedimentional nanorods through a one-step solution-phase chemical route under controlled conditions. In addition, The UV-Vis spectrum of the hierarchical CuO nanoarchitectures showed large blue shift because of the quantum size effect.

Hydrothermally Synthesized CuO Powders for Photocatalytic Inactivation of Bacteria

“…Copper oxide, as a p-type narrow band-gap semiconductor material, with capability to form various nanostructured morphologies (such as nanowalls [1], nanowires [2], nanoparticles [3], honeycombs [4], and hierarchical nanostructures [5,6]) has attracted great deal of attentions for versatile applications such as solar cells [7], electrochromic devices [8,9], catalysis [10] and photocatalysis [11,12], gas sensors [13], biosensors [14,15], eld-emitters [16,17], and antibacterial materials [1822]. In bactericidal applications, it has been conrmed that in contrast to low sensitivity of body tissue and skin to copper ions (as an advantage), microorganisms are extremely susceptible to copper ions and radicals photogenerated by CuO nanostructures [23].…”

Different copper oxide nanostructures: Synthesis, characterization, and application for C‐N cross‐coupling catalysis

“…This method provides a novel way to synthesize CuO nanostructures, which are difficult to obtain via other techniques. The hydrothermal process has been widely employed to prepare nanomaterials due to its advantages of low temperature, simplicity, and large-scale production [29,30,33]. The morphologies could be controlled by adjusting growth parameters, such as addition of surfactants, and the change of starting materials.…”

“…Fabrication of CuO nanospheres (C2) CuO nanospheres were synthesized by grinding NaOH with CuSO 4 ·5H 2 O with mole ratio of 3:1 at room temperature for 10 min [29]. The black powder was washed with distilled water and ethyl alcohol, dried at 60 °C.…”

Facile synthesis of 3D CuO nanowire bundle and its excellent gas sensing and electrochemical sensing properties

“…Because the practical performances of CuO nanomaterials are close related to its morphology and size, which ultimately depends on the preparation methods and reaction conditions [10,11], various methods have been developed to synthesize CuO nanostructures, for example, thermal oxidation of copper foil, hydrothermal route, vapor-liquid-solid synthesis, ultrasound irradiation, thermal decomposition of precursors, electron beam lithography, etc. [12][13][14][15]. However, it is still a challenge to develop a simple, rapid, easy to control and energy-efficient method for a large scale preparation of CuO micro/nanostructures with a designable morphology.…”