• 文献标题:   Green Synthesis of Fe/Graphene Nanocomposite Using Cleistocalyx operculatus Leaf Extract as a Reducing Agent: Removal of Pollutants (RhB Dye and Cr6+Ions) in Aqueous Media
  • 文献类型:   Article
  • 作  者:   VAN HOANG N, QUYNH NTX, DANG TD, XUAN TN, TOAN VN, LA DD
  • 作者关键词:   green reducing agent, cleistocalyx operculatus extract, nzvi, graphene nanocomposite, dyes degradation, hexavalent chromium removal
  • 出版物名称:   CHEMISTRYSELECT
  • ISSN:   2365-6549
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1002/slct.202203499
  • 出版年:   2022

▎ 摘  要

Industrial wastewater contains many compounds that pollute the environment, which have a strong impact on humans and the ecosystem. Zero-valent iron nanoparticles (nZVI) are materials with the potential to treat many wastes released into the aquatic environment. nZVI was synthesized via a green method using Cleistocalyx operculatus (CO) leaf extract as a reducing agent. Among them, graphene nanoplatelets (GNPs) were used as support materials to enhance the reduction capacity and stability of nZVI. The morphology, structure, and crystallinity of the nZVI@GNPs nanocomposite were demonstrated through scanning electron microscopy (SEM), X-ray diffraction (XRD), Energy Dispersive X-Ray Spectroscopy (EDS), and Fourier Transform Infrared (FTIR). Zero-valent iron nanoparticles following an optimized process for spherical particles with particle sizes ranging from 30-100 nm, uniformly distributed on the surface of GNPs. The removal performance of RhB and Chromium (VI) ions by the nZVI@GNPs composite was evaluated through Ultraviolet-Visible Spectroscopy (UV-Vis). The results show that nZVI/GNPs can remove RhB and Cr6+ more than 98 % after 30 minutes of treatment. The affecting factors on the treatment process, such as pH, reaction time, and amount of material, were also studied.