Synthesis of bimetallic FeMn nanoparticles using rooibos tea extract: characterization and application

Böke, Nuran; Kapiamba, Kashala Fabrice; Kimpiab, E.; Otor, Hope O.; Petrik, Leslie

doi:10.1007/s13762-023-04792-1

Cited by 5 publications

(2 citation statements)

References 72 publications

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“…Frontiers in Nanotechnology frontiersin.org application of many other nanomaterials such as selective nanofiber (Totito et al, 2023) composite membranes, photocatalysts (Mouele et al, 2023), thin films (Rossouw et al, 2022;Dinu et al, 2023) and nanoparticles (Pereao et al, 2017;Böke et al, 2023). The nanobiology-focused researchers work on several different fields.…”

Section: University Of the Western Capementioning

confidence: 99%

Nanoscience teaching and research program in South Africa

Lindsay,

Nel

2024

Front. Nanotechnol.

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Since 2012, the National Nanoscience Teaching and Training Platform (NNPTTP), funded by the South African Department of Science and Innovation (DSI), has been responsible for overseeing Africa’s first-ever master’s in nanoscience program. For over a decade, the NNPTTP has seen the cooperation of four partner universities across South Africa, namely, the University of Johannesburg (UJ), University of the Free State (UFS), University of the Western Cape (UWC), and Nelson Mandela University (NMU), culminating in over 250 graduates trained in either nanophysics, nanochemistry, or nanobiology. Originally established to train professionals for a nanotechnology-based industry, both in South Africa and internationally, the program and platform has evolved into a testament to scientific collaboration. This paper discusses the program’s framework, successes and challenges, related research, and future plans.

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Section: University Of the Western Capementioning

confidence: 99%

Nanoscience teaching and research program in South Africa

Lindsay,

Nel

2024

Front. Nanotechnol.

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“…Their effectiveness in removing pollutants from wastewater is due to their high surface area and small particle size. However, the synthesis of iron nanoparticles is expensive since it requires the use of a chemical reductant (such as sodium borohydride), which has stringent environmental restriction policies (Kimpiab et al 2022 ; Böke et al 2023 ). In this line of investigation, polyphenols derived from plant extracts provide an environmentally friendly, cheap, and effective reductant for the synthesis of iron nanoparticles (Fazlzadeh et al 2017 ; Abdelfatah et al 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Iron nanoparticles prepared from South African acid mine drainage for the treatment of methylene blue in wastewater

Folifac,

Ameh,

Broadhurst

et al. 2024

Environ Sci Pollut Res

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In this study, three acid mine drainage (AMD) sources were investigated as potential sources of iron for the synthesis of iron nanoparticles using green tea extract (an environmentally friendly reductant) or sodium borohydride (a chemical reductant). Electrical conductivity (EC), total dissolved solids (TDS), dissolved oxygen (DO), oxidation–reduction potential (ORP), ion chromatography (IC), and inductively coupled plasma-mass spectroscopy (ICP-MS) techniques were used to characterize the AMD, and the most suitable AMD sample was selected based on availability. Additionally, three tea extracts were characterized using ferric-reducing antioxidant power (FRAP) and 2,2-diphenyl-1-picryl-hydrazine-hydrate (DPPH), and the most suitable environmentally friendly reductant was selected based on the highest FRAP (1152 µmol FeII/g) and DPPH (71%) values. The synthesized iron nanoparticles were characterized and compared using XRD, STEM, Image J, EDS, and FTIR analytical techniques. The study shows that the novel iron nanoparticles produced using the selected green tea (57 nm) and AMD were stable under air due to the surface modification by polyphenols contained in green tea extract, whereas the nanoparticles produced using sodium borohydride (67 nm) were unstable under air and produced a toxic supernatant. Both the AMD-based iron nanoparticles can be used as Fenton-like catalysts for the decoloration of methylene blue solution. While 99% decoloration was achieved by the borohydride-synthesized nanoparticles, 81% decoloration was achieved using green tea-synthesized nanoparticles.

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