Abstract
Currently, green synthesis approach is used as the biocompatible, eco-friendly, and sustainable alternative of conventional approaches to synthesize iron oxide nanoparticles. In this work, magnetic iron oxide nanoparticles were synthesized by using plantain peel extract via green and biogenic approach. The surface of green synthesized iron oxide nanoparticles was functionalized to increase the stability of the nanoparticles and maintain the coexisting of both magnetic and catalytic property of the nanoparticles at the same time. Two kinds of surface functionalization structures were synthesized in this study, included silica core-iron oxide shell nanoparticles and silica core-PDDA polymerized iron oxide shell nanoparticles. The main concern of this study is the performance of bare and surface functionalized green synthesized nanoparticles. Methylene blue and methyl orange dyes were used as the model of dye removal test to indicate the feasibility of the synthesized nanocomposites. In summary, surface functionalized nanocomposites achieved higher dye removal efficiency than bare green synthesized iron oxide nanoparticles in both the methylene blue and methyl orange degradation test. Methylene blue dye was removed in higher rate than methyl orange dye due to the presence of negatively charged iron oxide nanoparticles with both the adsorptive and catalytic properties. At last, the components present in plantain peel extract were confirmed by using Fourier Transform Infrared Spectroscopy.
Highlights
Nanotechnology is a technology to manipulate matter through some chemical and/or physical processes to produce nanostructured materials with novel properties and functions [1]
G-FeONPs with magnetic and catalytic bifunctionalities can be readily synthesized by using plantain peel extracts (PPE)
silica core-poly(diallyldimethylammonium chloride) (PDDA) polymerized iron oxide shell (SCPPIS) and silica core-iron oxide shell (SCIS) nanocomposites achieved 53.30% and 93.57% in methyl orange (MO) and methylene blue (MB) dye degradation test respectively, which is higher than bare G-FeONPs in the presence of H2O2
Summary
Nanotechnology is a technology to manipulate matter through some chemical and/or physical processes to produce nanostructured materials with novel properties and functions [1]. Research focus has shifted towards the exploitation of green synthesis FeONPs by clean and non-toxic synthesis protocols that minimize the usage of toxic chemicals to restore the environment [17] In this case, the performance of green synthesized iron oxide NPs (G-FeONPs) plays an important role in showing that the green synthesis methods can be used as the alternative way to substitute the chemical synthesis method. Layer-by-layer (LbL) technique was used to assemble the G-FeONPs into core-shell structure [19] Both of the surface functionalized G-FeONPs were compared to each other and to the bare G-FeONPs in order to differentiate their features .The organic dyes, methylene blue (MB) and methyl orange (MO) were employed as the cationic and anionic dye in this work to compare their performance through dye removal test. The R with lower molecular weight will be further decomposed until complete mineralization into water and carbon dioxide as the final products [21]
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