AUTHOR=Shan Zezhi , Yang Yanrong , Shi Haoran , Zhu Jiali , Tan Xiao , Luan Yi , Jiang Zhenqi , Wang Ping , Qin Jieling 

TITLE=Hollow Dodecahedra Graphene Oxide- Cuprous Oxide Nanocomposites With Effective Photocatalytic and Bactericidal Activity

JOURNAL=Frontiers in Chemistry

VOLUME=9

YEAR=2021

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2021.755836

DOI=10.3389/fchem.2021.755836

ISSN=2296-2646

ABSTRACT=<p>In this study, a kind of graphene oxide-cuprous oxide (GO-Cu<sub>2</sub>O) nanocomposites was fabricated with different morphologies to serve as a photocatalytic material for the degradation of organic/inorganic dyes under visible light and the bactericidal effect against pathogenic bacteria. The GO-Cu<sub>2</sub>O was prepared with solid cube and hollow dodecahedra morphologies through <italic>in-situ</italic> synthesis, and characterized by scanning electron microscopy (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), Raman, Ultraviolet and visible spectrophotometry (UV/vis), and Fourier transform infrared spectroscopy. In comparison with cubic GO-Cu<sub>2</sub>O, the absorption and degradation efficiency of the GO-Cu<sub>2</sub>O dodecahedra (GCD) composite in Methyl orange (MO), Rhodamine B (RhB), and phenol was higher owning to the more active sites for the simultaneous dye and light absorption of hollow structure. The antibacterial effect of the GO-Cu2O dodecahedra was examined by the flat colony counting method with an excellent bactericidal effect against pathogenic bacteria. The possible mechanism for the preparation of GCD possessing the enhancement of the visible-light photocatalytic and antibacterial efficiencies were also investigated.</p>