Biogenic synthesis of reduced graphene oxide decorated with silver nanoparticles (rGO/Ag NPs) using table olive (olea europaea) for efficient and rapid catalytic reduction of organic pollutants

Wen Sun; Yaoliang Hong; Tian Li; Huaqiang Chu; Junxia Liu; Li Feng; Mehidi Baghayeri

doi:10.1016/j.chemosphere.2022.136759

Biogenic synthesis of reduced graphene oxide decorated with silver nanoparticles (rGO/Ag NPs) using table olive (olea europaea) for efficient and rapid catalytic reduction of organic pollutants

Chemosphere. 2023 Jan:310:136759. doi: 10.1016/j.chemosphere.2022.136759. Epub 2022 Oct 10.

Authors

Wen Sun¹, Yaoliang Hong¹, Tian Li², Huaqiang Chu², Junxia Liu³, Li Feng⁴, Mehidi Baghayeri⁵

Affiliations

¹ School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China; National & Local Joint Engineering Laboratory for Municipal Sewage Resource Utilization Technology, Suzhou University of Science and Technology, China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, 215009, China.
² State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.
³ School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, China.
⁴ School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou, 510006, China. Electronic address: fl19860314@126.com.
⁵ Department of Chemistry, Faculty of Science, Hakim Sabzevari University, PO. Box 397, Sabzevar, Iran.

PMID: 36228729
DOI: 10.1016/j.chemosphere.2022.136759

Abstract

In this work, graphene oxide (GO) sheets were prepared via a facile electrochemical exfoliation of graphite in acidic medium and subsequent oxidation with potassium permanganate. The GO sheets were employed for preparation of reduced GO adorned with nanosized silver (rGO/Ag NPs) using green reduction of GO and Ag(I) via olive fruit extract as a reducing and immobilizing agent. The crystal phase, morphology, and nanostructure of the prepared catalyst were characterized by XRD, SEM, EDX, UV-Vis and Raman spectroscopy techniques. The as-prepared rGO/Ag NPs showed superior catalytic performance towards the complete reduction (up to 99%) of 4-nitrophenol (4-NPH) to 4-aminophenol (4-APH) and rhodamine B (RhB) to Leuco RhB within 180 s using NaBH₄ at ambient condition. The rate constant (k) values were found to be 0.021 and 0.022 s^-1 for 4-NPH and RhB reduction, respectively. In addition, the regenerated catalyst could be reused after seven cycles without losing any apparent catalytic efficiency. Accounting for the excellent catalytic capability, chemical stability and environment-friendly synthesis protocol, the rGO/Ag NPs has great potential working as a heterogeneous catalyst in the transforming harmful organic contaminants into less harmful or harmless compounds.

Keywords: Biosynthesis; Catalytic reduction; Graphene oxide; Silver nanoparticles.

MeSH terms

Environmental Pollutants*
Graphite* / chemistry
Metal Nanoparticles* / chemistry
Olea*
Silver / chemistry

Substances

graphene oxide
Graphite
Silver
Environmental Pollutants