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An innovative, highly stable Ag/ZIF-67@GO nanocomposite with exceptional peroxymonosulfate (PMS) activation efficacy, for the destruction of chemical and microbiological contaminants under visible light

Kohantorabi, M ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jhazmat.2021.125308
  3. Publisher: Elsevier B.V , 2021
  4. Abstract:
  5. In this work, Ag nanoparticles were loaded on ZIF-67 covered by graphene oxide (Ag/ZIF-67@GO), and its catalytic performance was studied for the heterogeneous activation of peroxymonosulfate (PMS) under visible-light. The catalyst surface morphology and structure were analyzed by FT-IR, XRD, XPS, DRS, FE-SEM, EDX, TEM, BET, ICP-AES and TGA analysis. The efficacy of PMS activation by the Ag/ZIF-67@GO under visible light was assessed by phenol degradation and E. coli inactivation. Phenol was completely degraded within 30 min by HO•, SO4•− and O2•− generated through the photocatalytic PMS activation. In addition, total E. coli inactivation was attained in 15 min that confirmed the highly efficient catalytic activation of PMS by the as-made nanocomposite under visible light. The reaction mechanism was elucidated and the importance of the generated reactive species followed the order of: HO• > SO4•− > O2•− > h+, implying a radical-pathway dominated process. © 2021 Elsevier B.V
  6. Keywords:
  7. Atomic emission spectroscopy ; Biodegradation ; Chemical activation ; Graphene ; Morphology ; Nanocomposites ; Phenols ; Silver nanoparticles ; Surface morphology ; Activation efficacy ; Catalytic activation ; Catalytic performance ; E.Coli inactivation ; Morphology and structures ; Peroxymonosulfate ; Phenol degradation ; Reaction mechanism ; Graphene oxide ; Imidazole ; Nanocomposite ; Oxygen ; Phenol ; Silver nanoparticle ; Unclassified drug ; Zeolite ; Zeolite imidazole framework 67 ; Metal nanoparticle ; Peroxide ; Peroxymonosulfate ; Catalysis ; Innovation ; Nanocomposite ; Photodegradation ; Silver ; Sulfate ; Visible spectrum ; Bacterium contamination ; Brunauer emmett teller ; Chemical analysis ; Controlled study ; Degradation kinetics ; Diffuse reflectance spectroscopy ; Energy dispersive X ray spectroscopy ; Escherichia coli ; Field emission scanning electron microscopy ; Fourier transform infrared spectroscopy ; Inductively coupled plasma atomic emission spectrometry ; Light exposure ; Nonhuman ; Photocatalysis ; Pore size distribution ; Reaction analysis ; Structure analysis ; Surface area ; Thermogravimetry ; Transmission electron microscopy ; Ultraviolet visible spectrophotometry ; X ray diffraction ; X ray photoemission spectroscopy ; Infrared spectroscopy ; Light ; Metal Nanoparticles ; Peroxides ; Spectroscopy, Fourier Transform Infrared
  8. Source: Journal of Hazardous Materials ; Volume 413 , 2021 ; 03043894 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0304389421002715