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Open AccessArticle

Advanced Nanoscale Surface Characterization of CuO Nanoflowers for Significant Enhancement of Catalytic Properties

1
Microelectronics and Nanotechnology-Shamsuddin Research Centre (MiNT-SRC), Institute for Integrated Engineering, Universiti Tun Hussein Onn Malaysia (UTHM), Parit Raja, Batu Pahat Johor 86400, Malaysia
2
Department of Physics, Faculty of Basic and Applied Sciences, International Islamic University, Sector H-10, Islamabad 44000, Pakistan
3
Chemical Reaction Engineering Group (CREG), School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia (UTM), Skudai, Johor Bharu 81310, Malaysia
4
School of Electrical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia (UTM), Skudai, Johor Bharu 81310, Malaysia
*
Authors to whom correspondence should be addressed.
Academic Editor: Mohammed Baalousha
Molecules 2021, 26(9), 2700; https://doi.org/10.3390/molecules26092700
Received: 17 March 2021 / Revised: 13 April 2021 / Accepted: 15 April 2021 / Published: 4 May 2021
In this work, advanced nanoscale surface characterization of CuO Nanoflowers synthesized by controlled hydrothermal approach for significant enhancement of catalytic properties has been investigated. The CuO nanoflower samples were characterized by field-emission scanning electron microscopy (FE-SEM), X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, high-resolution transmission electron microscopy (HR-TEM), selected-area electron diffraction (SAED), high-angular annular dark field scanning transmission electron microscopy (HAADF-STEM) with elemental mapping, energy dispersive spectroscopy (STEM-EDS) and UV–Vis spectroscopy techniques. The nanoscale analysis of the surface study of monodispersed individual CuO nanoflower confirmed the fine crystalline shaped morphology composed of ultrathin leaves, monoclinic structure and purified phase. The result of HR-TEM shows that the length of one ultrathin leaf of copper oxide nanoflower is about ~650–700 nm, base is about ~300.77 ± 30 nm and the average thickness of the tip of individual ultrathin leaf of copper oxide nanoflower is about ~10 ± 2 nm. Enhanced absorption of visible light ~850 nm and larger value of band gap energy (1.68 eV) have further supported that the as-grown material (CuO nanoflowers) is an active and well-designed surface morphology at the nanoscale level. Furthermore, significant enhancement of catalytic properties of copper oxide nanoflowers in the presence of H2O2 for the degradation of methylene blue (MB) with efficiency ~96.7% after 170 min was obtained. The results showed that the superb catalytic performance of well-fabricated CuO nanoflowers can open a new way for substantial applications of dye removal from wastewater and environment fields. View Full-Text
Keywords: nanoscale surface characterization; CuO nanoflowers; XPS; HR-TEM; SAED; HAADF-STEM; wide absorption; hydrogen peroxide; ultrathin leaves; superb catalytic performance nanoscale surface characterization; CuO nanoflowers; XPS; HR-TEM; SAED; HAADF-STEM; wide absorption; hydrogen peroxide; ultrathin leaves; superb catalytic performance
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MDPI and ACS Style

Khan, M.A.; Nayan, N.; Shadiullah; Ahmad, M.K.; Fhong, S.C.; Tahir, M.; Mohamed Ali, R.A.; Mohamed Ali, M.S. Advanced Nanoscale Surface Characterization of CuO Nanoflowers for Significant Enhancement of Catalytic Properties. Molecules 2021, 26, 2700. https://doi.org/10.3390/molecules26092700

AMA Style

Khan MA, Nayan N, Shadiullah, Ahmad MK, Fhong SC, Tahir M, Mohamed Ali RA, Mohamed Ali MS. Advanced Nanoscale Surface Characterization of CuO Nanoflowers for Significant Enhancement of Catalytic Properties. Molecules. 2021; 26(9):2700. https://doi.org/10.3390/molecules26092700

Chicago/Turabian Style

Khan, Muhammad A.; Nayan, Nafarizal; Shadiullah; Ahmad, Mohd K.; Fhong, Soon C.; Tahir, Muhammad; Mohamed Ali, Riyaz A.; Mohamed Ali, Mohamed S. 2021. "Advanced Nanoscale Surface Characterization of CuO Nanoflowers for Significant Enhancement of Catalytic Properties" Molecules 26, no. 9: 2700. https://doi.org/10.3390/molecules26092700

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