Electrooxidation of nitrite based on green synthesis of gold nanoparticles using Hibiscus sabdariffa leaves

Taib, Siti Husnaa Mohd; Shameli, Kamyar; Nia, Pooria Moozarm; Etesami, Mohammad; Miyake, Mikio; Ali, Rusmidah; Abouzari‐Lotf, Ebrahim; Izadiyan, Zahra

doi:10.1016/j.jtice.2018.09.021

Cited by 56 publications

(13 citation statements)

References 49 publications

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“…The fresh H. sabdariffa L. was washed several times with distilled water to clear away its impurities and dried for 2 days at 65 • C. Once the product was dry, it was powdered and dispersed into distilled water for 30 min at 60 • C. The mixture was then separated by filtration, leaving a pale orange color residual extract with a pH of 3.1. This extract was finally used in 9-nm AuNP synthesis [77].…”

Section: Green Synthesis Methodsmentioning

confidence: 99%

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Synthesis, Chemical–Physical Characterization, and Biomedical Applications of Functional Gold Nanoparticles: A Review

et al. 2021

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Relevant properties of gold nanoparticles, such as stability and biocompatibility, together with their peculiar optical and electronic behavior, make them excellent candidates for medical and biological applications. This review describes the different approaches to the synthesis, surface modification, and characterization of gold nanoparticles (AuNPs) related to increasing their stability and available features useful for employment as drug delivery systems or in hyperthermia and photothermal therapy. The synthetic methods reported span from the well-known Turkevich synthesis, reduction with NaBH4 with or without citrate, seeding growth, ascorbic acid-based, green synthesis, and Brust–Schiffrin methods. Furthermore, the nanosized functionalization of the AuNP surface brought about the formation of self-assembled monolayers through the employment of polymer coatings as capping agents covalently bonded to the nanoparticles. The most common chemical–physical characterization techniques to determine the size, shape and surface coverage of AuNPs are described underlining the structure–activity correlation in the frame of their applications in the biomedical and biotechnology sectors.

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Section: Green Synthesis Methodsmentioning

confidence: 99%

“…The mixture was then separated by filtration, leaving a pale orange color residual extract with a pH of 3.1. This extract was finally used in 9-nm AuNP synthesis [ 77 ].…”

Section: Fabrication Of Gold Nanoparticles By Chemical Routesmentioning

confidence: 99%

Synthesis, Chemical–Physical Characterization, and Biomedical Applications of Functional Gold Nanoparticles: A Review

et al. 2021

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“…Both research groups proved that the assembly of chromanol groups on gold nanoparticles could efficiently enhance the activity of the vitamin E-derived antioxidant. In 2019, Mohd Taib et al [ 445 ] synthesized Au-NPs utilizing water extract of Hibiscus sabdariffa leaves. Owing to the UV–VIS, FTIR, and HPLC analysis, chlorogenic acid was identified as the major antioxidant compound involved in the reduction of Au 3+ ions.…”

Section: Synthesis Of Nanoparticles (Nps) By Natural Extractsmentioning

confidence: 99%

Antioxidants: Classification, Natural Sources, Activity/Capacity Measurements, and Usefulness for the Synthesis of Nanoparticles

et al. 2021

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Natural extracts are the source of many antioxidant substances. They have proven useful not only as supplements preventing diseases caused by oxidative stress and food additives preventing oxidation but also as system components for the production of metallic nanoparticles by the so-called green synthesis. This is important given the drastically increased demand for nanomaterials in biomedical fields. The source of ecological technology for producing nanoparticles can be plants or microorganisms (yeast, algae, cyanobacteria, fungi, and bacteria). This review presents recently published research on the green synthesis of nanoparticles. The conditions of biosynthesis and possible mechanisms of nanoparticle formation with the participation of bacteria are presented. The potential of natural extracts for biogenic synthesis depends on the content of reducing substances. The assessment of the antioxidant activity of extracts as multicomponent mixtures is still a challenge for analytical chemistry. There is still no universal test for measuring total antioxidant capacity (TAC). There are many in vitro chemical tests that quantify the antioxidant scavenging activity of free radicals and their ability to chelate metals and that reduce free radical damage. This paper presents the classification of antioxidants and non-enzymatic methods of testing antioxidant capacity in vitro, with particular emphasis on methods based on nanoparticles. Examples of recent studies on the antioxidant activity of natural extracts obtained from different species such as plants, fungi, bacteria, algae, lichens, actinomycetes were collected, giving evaluation methods, reference antioxidants, and details on the preparation of extracts.

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“…Adhering to the principles of green chemistry, Mohd Taib et al have described a new method for synthesis of AuNPs, using water extract of Hibiscus sabdariffa leaves (H. sabdariffa L.) as both reductant and stabilizer. 136 The proposed procedure is reliable, environmentally friendly and cost-effective compared to other conventional synthesis methods. The authors suggested that chlorogenic acid (an ester of caffeic acid and quinic acid) in H. sabdariffa L. extract is the major compound involved in the reduction of Au 3+ to Au 0 .…”

Section: Electrochemical Sensors Based On Biosynthesized Aunpsmentioning

confidence: 94%

Application of biosynthesized metal nanoparticles in electrochemical sensors

et al. 2022

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Recently, the development of eco-friendly, cost-effective and reliable methods for synthesis of metal nanoparticles has drawn a considerable attention. The so-called green synthesis, using mild reaction conditions and natural resources as plant extracts and microorganisms, has established as a convenient, sustainable, cheap and environmentally safe approach for synthesis of a wide range of nanomaterials. Over the past decade, biosynthesis is regarded as an important tool for reducing the harmful effects of traditional nanoparticle synthesis methods commonly used in laboratories and industry. This review emphasizes the significance of biosynthesized metal nanoparticles in the field of electrochemical sensing. There is increasing evidence that green synthesis of nanoparticles provides a new direction in designing of cost-effective, highly sensitive and selective electrode-catalysts applicable in food, clinical and environmental analysis. The article is based on 157 references and provided a detailed overview on the main approaches for green synthesis of metal nanoparticles and their applications in designing of electrochemical sensor devices. Important operational characteristics including sensitivity, dynamic range, limit of detection, as well as data on stability and reproducibility of sensors have also been covered. Keywords: biosynthesis; green synthesis; nanomaterials; nanotechnology; modified electrodes

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Electrooxidation of nitrite based on green synthesis of gold nanoparticles using Hibiscus sabdariffa leaves

Cited by 56 publications

References 49 publications

Synthesis, Chemical–Physical Characterization, and Biomedical Applications of Functional Gold Nanoparticles: A Review

Synthesis, Chemical–Physical Characterization, and Biomedical Applications of Functional Gold Nanoparticles: A Review

Antioxidants: Classification, Natural Sources, Activity/Capacity Measurements, and Usefulness for the Synthesis of Nanoparticles

Application of biosynthesized metal nanoparticles in electrochemical sensors

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