Mimosa pudica Flower Extract Mediated Green Synthesis of Gold Nanoparticles

Abstract

The use of Mimosa pudica flower extract in the synthesis of highly stable gold nanoparticles (AuNPs) is reported here. On treatment of aqueous chloroauric acid with crude aqueous extract of Mimosa pudica flowers, rapid reduction of Au 3+ ions at room temperature was observed without the need of any additional reducing or stabilizing agent. The synthesized AuNPs were characterized by UV-Vis spectroscopy, Field Emission Scanning Electron Microscopy (FESEM), Transmission Electron Microscopy (TEM), Dynamic Light Scattering (DLS) and Zeta potential, X-Ray Diffraction (XRD) and Fourier Transform Infra-Red (FTIR) spectroscopy. UV-Vis studies indicated the formation of AuNPs. The AuNPs were almost spherical in shape with an average particle size of 24 nm as determined by FESEM, TEM and DLS particle size analysis. XRD studies and high resolution TEM images ascertained the crystalline nature of the AuNPs. FTIR analysis of flower extract and AuNPs showed the possibility of phenolic group as responsible for the reduction of Au 3+. The stability of the AuNPs was analyzed by Zeta potential measurements. A negative Zeta potential value of -33.4 mV proved the stability of the AuNPs. The as synthesized AuNPs exhibited good catalytic activity in the model reduction reaction of 4-Nitrophenol to 4-Aminophenol.

Biogenic fabrication of nanomaterials from flower-based chemical compounds, characterization and their various applications: A review

“…For instance, Mimosa pudica flowers extract synthesized Au-NPs showed good catalytic activity in the model reduction reaction of 4-nitrophenol to 4-aminophenol. ( Mapala and Pattabi, 2017 ). Ipomoea digitata extract flower mediated Ag-NPs also displayed a noticeable catalytic reduction for methylene blue dye in the presence of NaBH 4 .…”

Exploring the Chemistry of Natural Products and Biological Properties of Mimosa Linnaeus Genus (FABACEAE-MIMOSOIDADE)

“…173 As aplicações nanotecnológicas empregando extratos de espécies do gênero Mimosa L. tem possibilitado a síntese de nanomateriais com estruturas e propriedades diferenciadas para aplicações em LED (do inglês, Light Emitting Diode), nanocatálise e sensores químicos. [174][175][176][177] Kim et al 178 desenvolveram um sensor químico de etanol utilizando nanoestruturas de α-Fe2O3, com características morfológicas e estruturais controladas pelo extrato de folhas de M. pudica. As nanopartículas de óxido de ferro com propriedades magnéticas também foram sintetizadas utilizando o extrato aquoso de raízes de M. pudica.…”

“…180 Recentemente, AuNPs foram desenvolvidas utilizando extratos aquosos de flores, folhas, cascas e raízes de M. pudica como agentes redutores e estabilizadores. 176,177 Uma das espécies mais representativas quanto ao potencial tecnológico e medicinal deste gênero é a M. pudica, intensamente depositada em pedidos de patentes na base European Patent Office (EPO), devido ao elevado uso e aplicações na medicina tradicional chinesa. [181][182][183][184][185][186][187][188][189][190][191][192][193][194][195][196][197] A maioria das patentes foram classificadas na seção de necessidades humanas (A) com aplicações relacionadas às suas propriedades biológicas e tradicionais conhecidas (Tabela 2).…”

Biogenic Synthesis of Gold Nanoparticles and their Applications: A Review

“…Flower mediated biosynthesis: Some flowers have been examined by the researchers for the synthesis of gold nanoparticles of diverse morphology. Flower mediated biosynthesis for the gold nanoparticles synthesis has been carried out by using different flowers such as Gnidia glauca [126], Nyctanthes arbortristis [127], Prunus serotina [128], Ixora coccinea [129], Cassia auriculata [130], Couroupita guianensis [131], Mimosa pudica [132], Moringa oleifera [133], Plumeria alba Linn. [134], Mirabilis jalapa [135], Tagetes arecia [136], Bauhinia purpurea [137] and Tagetes erecta [138].…”