Biosynthesized unmodified silver nanoparticles: A colorimetric optical sensor for detection of Hg2+ ions in aqueous solution

Sanjeevappa, Harisha K.; Nilogal, Parushuram; Rayaraddy, Ranjana; Martis, Lavita J.; Narayana, B.; Sangappa, Y.

doi:10.1016/j.rechem.2022.100507

Cited by 13 publications

(6 citation statements)

References 47 publications

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“…range Colorimetric sensor Response time Matrix effect Refs. Hg 2+ 1.322 × 10 −5 M 4.4 × 10 −5 M 0.9814 10 –2 –10 −7 M AgNPs without modification Just added No interference Current study 8 × 10 –7 M – 0.9956 1-70 µM AgNPs without modification 5 min No interferences [ 126 ] 28 ppm 85 ppm 0.965 7–63 ppm AgNPs without modification 1 min No interferences [ 129 ] 15 ppb – 0.995 10–1000 ppb AgNPs without modification 5 min – [ 130 ] 0.5 mg/L 1.69 mg/L 0.989 10–80 mg/L AgNPs without modification 30 s – [ 131 ] 1.8 nmol L-1 – – 0.005 to 41 μmol L −1 Boronic acid functionalized MoS2 quantum dot – – [ 132 …”

Section: Resultsmentioning

confidence: 99%

Green synthesis of silver nanoparticles and its environmental sensor ability to some heavy metals

Ibrahim,

Taha,

Hagaggi

et al. 2024

BMC Chemistry

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This study marks a pioneering effort in utilizing Vachellia tortilis subsp. raddiana (Savi) Kyal. & Boatwr., (commonly known as acacia raddiana) leaves as both a reducing and stabilizing agent in the green “eco-friendly” synthesis of silver nanoparticles (AgNPs). The research aimed to optimize the AgNPs synthesis process by investigating the influence of pH, temperature, extract volume, and contact time on both the reaction rate and the resulting AgNPs' morphology as well as discuss the potential of AgNPs in detecting some heavy metals. Various characterization methods, such as UV–vis spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), infrared spectroscopy (IR), Zeta sizer, EDAX, and transmitting electron microscopy (TEM), were used to thoroughly analyze the properties of the synthesized AgNPs. The XRD results verified the successful production of AgNPs with a crystallite size between 20 to 30 nm. SEM and TEM analyses revealed that the AgNPs are primarily spherical and rod-shaped, with sizes ranging from 8 to 41 nm. Significantly, the synthesis rate of AgNPs was notably higher in basic conditions (pH 10) at 70 °C. These results underscore the effectiveness of acacia raddiana as a source for sustainable AgNPs synthesis. The study also examined the AgNPs' ability to detect various heavy metal ions colorimetrically, including Hg2+, Cu2+, Pb2+, and Co2+. UV–Vis spectroscopy proved useful for this purpose. The color of AgNPs shifts from brownish-yellow to pale yellow, colorless, pale red, and reddish yellow when detecting Cu2+, Hg2+, Co2+, and Pb2+ ions, respectively. This change results in an alteration of the AgNPs' absorbance band, vanishing with Hg2+ and shifting from 423 to 352 nm, 438 nm, and 429 nm for Cu2+, Co2+, and Pb2+ ions, respectively. The AgNPs showed high sensitivity, with detection limits of 1.322 × 10–5 M, 1.37 × 10–7 M, 1.63 × 10–5 M, and 1.34 × 10–4 M for Hg2+, Cu2+, Pb2+, and Co2+, respectively. This study highlights the potential of using acacia raddiana for the eco-friendly synthesis of AgNPs and their effectiveness as environmental sensors for heavy metals, showcasing strong capabilities in colorimetric detection.

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Section: Resultsmentioning

confidence: 99%

Green synthesis of silver nanoparticles and its environmental sensor ability to some heavy metals

Ibrahim,

Taha,

Hagaggi

et al. 2024

BMC Chemistry

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“…This leads to the transformation of mercury ions into mercury particles (surrounded by hydroxyl). Next, a part of the mercury ions interacts with silver ions and turns into a silver-mercury molecule, and then gradually, the silver nanoparticles turn into normal silver particles, and the concentration of the fluorescence intensity of the product decreases [23,49,91].…”

Section: Mercury Ions (Hg 2+ ) Sensing Analysismentioning

confidence: 99%

“…Recently, nanotechnology has become one of the most common and important modern methods for dealing with different kinds of pollution, such as heavy metals or microbial contamination [19,20]. Researchers have become interested in this technology because of the special and superior characteristics of nanomaterials in the field of pollution treatment in terms of cost, simplicity of preparation, controllability, and other relevant aspects [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

The Effect of the Saudi Haloxylon ammodendron Shrub on Silver Nanoparticles: Optimal Biosynthesis, Characterization, Removability of Mercury Ions, Antimicrobial and Anticancer Activities

Al-Hakimi,

Alresheedi,

Albarrak

2023

Inorganics

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This research provides a sustainable way to treat water by removing heavy metal hazards (mercury ion) and biological pollutants (several strains of bacteria and fungi) through the eco-friendly synthesis of silver nanoparticles using the ethanol extract of the Saudi Haloxylon ammodendron shrub, which is planted in the Qassim desert. Further, this work confirms that these nanoparticles could be used as anticancer materials. The optimization factors of the biosynthesis of silver nanoparticles were studied and obtained (volume ratio = 1:2, pH = 7.5, and temperature = 60 °C). The scanning electron microscope micrographs showed the spherical shape and the huge numbers of silver nanoparticles accumulated, while X-ray diffraction measurements gave the crystal size of these nanoparticles in the range of 10.64 nm. The application findings of these biofabricated silver nanoparticles demonstrated effective detection and removal of different concentrations of mercury ions (0–2500 ppm) from the polluted aqueous solutions. The work revealed that Haloxylon ammodendron extract enhanced the antibacterial and antifungal activities of silver nanoparticles against different strains of bacteria and fungi. As well, the anticancer activity examinations of these nanoparticles and the extract showed good and reasonable results.

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“…Among the preparation approaches, the Turkevich [16] and Brust-Schiffrin methods [17] are well-known for AuNP preparation. Chemical sensors have emerged as promising tools for diverse applications in clinical and treatment domains [18,19], environmental monitoring [20], analysis of industrial samples [21], and examination of food-related samples [22]. AuNPs are widely used in chemical sensing platforms for analyte detection.…”

Section: Introductionmentioning

confidence: 99%

One-pot and facile preparation of gold nanoparticles using glutaraldehyde as a reducing and stabilising agent for protein immobilisation

Ahangari,

Majdi,

Nazari

et al. 2024

Adv. Nat. Sci: Nanosci. Nanotechnol.

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Gold nanoparticles (AuNPs) have attractedthe interest of scientists owing to their unique applications in diverse fields. This study presents a report on the utilisation of glutaraldehyde (GA) as a reducing and stabilising agent for the one-pot preparation of AuNPs functionalised with GA (GA-AuNPs), designed specifically for the immobilisation of proteins. The preparation of stable GA-AuNPs has been systematically explored by varying the temperature, quantity of GAs, and pH. Subsequently, bovine serum albumin and horseradish peroxidase have been immobilised on the GA-AuNPs surface to demonstrate the versatility of GA-AuNPs. Dynamic light scattering results indicated that the prepared quasi-spherical GA-AuNPs exhibited a zeta potential of −31.2 ± 2.3 mV and had a size of 5.7 ± 0.5 nm. The advantages of this method include its simplicity at room temperature under approximately neutral pH conditions, elimination of the need for additional steps, and streamlining of the immobilisation process. These results emphasise that GA-AuNPs are promising candidates for effectively transporting proteins or enzymes across a diverse range of applications.

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Biosynthesized unmodified silver nanoparticles: A colorimetric optical sensor for detection of Hg2+ ions in aqueous solution

Cited by 13 publications

References 47 publications

Green synthesis of silver nanoparticles and its environmental sensor ability to some heavy metals

Green synthesis of silver nanoparticles and its environmental sensor ability to some heavy metals

The Effect of the Saudi Haloxylon ammodendron Shrub on Silver Nanoparticles: Optimal Biosynthesis, Characterization, Removability of Mercury Ions, Antimicrobial and Anticancer Activities

One-pot and facile preparation of gold nanoparticles using glutaraldehyde as a reducing and stabilising agent for protein immobilisation

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