Improving photocatalytic activity of the ZnS QDs via lanthanide doping and photosensitizing with GO and g-C3N4 for degradation of an azo dye and bisphenol-A under visible light irradiation

In this research, insertion of Gd ions (2 wt%) into the crystalline lattice of the ZnS QDs enhanced the photocatalytic activity of the QDs. In addition, the influence of graphene oxide (GO) and graphitic carbon nitride (g-C3N4) was assessed on the photocatalytic activity of the ZnS QDs through degradation of acid red 14 (AR14) and bisphenol-A (BA) under visible light. Higher photocatalytic degradation efficiency (97.1% for AR14 and 67.4% for BA within 180 min) and higher total organic carbon (TOC) removal (67.1% for AR14 and 59.2% for BA within 5 h) was achieved in the presence of ZnS QDs/g-C3N4 compared with ZnS QDs/GO nanocomposite. Finally, the Gd-doped ZnS QDs were hybridized with g-C3N4 as optimal support to fabricate a potent visible-light-driven photocatalyst for the decomposition of organic contaminants. The maximum photocatalytic degradation of 99.1% and 80.5% were achieved for AR14 and BA, respectively, in the presence of Gd-doped ZnS QDs/g-C3N4 nanocomposite. The photosensitization mechanism was suggested for the improved photocatalytic activity of the ZnS QDs/GO, ZnS QDs/g-C3N4, and Gd-doped ZnS QDs/g-C3N4 nanocomposites under visible light. © 2022 Elsevier Ltd

Authors
Amani-Ghadim A.R.1, 2 , Arefi-Oskoui S.3 , Mahmoudi R.1 , Sareshkeh A.T.4 , Khataee A. 3, 5 , Khodam F.6 , Seyed Dorraji M.S.
Journal
Publisher
Elsevier Ltd
Language
English
Status
Published
Number
133917
Volume
295
Year
2022
Organizations
  • 1 Applied Chemistry Research Laboratory, Department of Chemistry, Faculty of Basic Science, Azarbaijan Shahid Madani University, P.O. Box 83714-161, Tabriz, Iran
  • 2 New Technologies in the Environment Research Center, Azarbaijan Shahid Madani University, P.O. Box 83714-161, Tabriz, Iran
  • 3 Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471, Tabriz, Iran
  • 4 Applied Chemistry Research Laboratory, Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, Iran
  • 5 Рeoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, Moscow, 117198, Russian Federation
  • 6 Research Laboratory of Environmental Protection Technology, Faculty of Chemistry, Department of Applied Chemistry, University of Tabriz, Iran
Keywords
Gd doping; Graphene oxide; Graphitic carbon nitride; Photocatalysis; Zinc sulfide quantum dots
Date of creation
06.07.2022
Date of change
06.07.2022
Short link
https://repository.rudn.ru/en/records/article/record/83658/
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