Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 482, Issue -, Pages 477-484Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2015.07.003
Keywords
Hydrothermal; Nanocomposite; Zinc oxide; Photocatalyst; Antibacterial
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Funding
- ChonbukNational University
- Korean Ministry of Education, Science, and Technology (MEST) through the National Research Foundation (NRF) [2014-R1A1A2009068, 2013-R1A2A2A04015484]
- National Research Foundation of Korea [22A20130012537, 2013R1A2A2A04015484] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A multifunctional Ag-ZnO/g-C3N4 composite was hydrothermally synthesized using aqueous dispersion of g-C3N4 particles with Ag and ZnO precursors by heat treatment at 130 degrees C for 3 h. The prepared composite was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR), and photoluminescence spectroscopy (PL) to reveal the formation of composite metal, metal oxide, and carbon nitride. Well attached ZnO microflowers were formed on the surface of g-C3N4 sheets, when hydrothermal solution was treated without silver precursor. However, silver doped ZnO nanoflowers were appeared on g-C3N4 sheets, when the silver nitrate containing hydrothermal solution was treated. The photocatalytic activity and antibacterial properties of as-prepared composite were studied by photocatalytic reduction of methylene blue (MB) solution and destruction of Gram-negative Escherichia coli bacteria, respectively. It was found that Ag-ZnO/g-C3N4 composite exhibited better photocatalytic and antibacterial activity compared to g-C3N4 and ZnO/g-C3N4 particles. A sample of Ag-ZnO/g-C3N4 also exhibited favorable stability and durability. The nanocomposite obtained from this simple and convenient facile one-pot synthesis may become a prospective photocatalyst. (C) 2015 Elsevier B.V. All rights reserved.
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