Dataset Information

A Highly Selective and Sensitive Nano-Silver sol Sensor for Hg²⁺ and Fe³⁺: Green Preparation and Mechanism.

ABSTRACT: The development of highly selective and highly sensitive nanometer colorimetric chemical sensors is an urgent requirement in the immediate detection of heavy metal ions. In this work, silver-nanoparticle (Ag NPs)-based chemosensors were prepared by a simple and green method, in which the silver nitrate, carboxymethyl cellulose sodium (CMS) and Polyvinylpyrrolidone (PVP), and glucose are used as the silver source, double stabilizer and green reductant, respectively. The obtained colloidal CMS/PVP-Ag NPs showed a high dispersibility and stability, and creating a high selectivity and sensitivity to detect Hg²⁺ and Fe³⁺ with remarkable and rapid color variation. Low limits of detection (LOD) of 7.1 nM (0-20 μM) and 15.2 nM (20-100 μM) for Hg²⁺ and 3.6 nM for Fe³⁺ were achieved. More importantly, the CMS/PVP-Ag NPs has a high sensitivity even in a complex system with multiple heavy ions, the result of the practical ability to detect Hg²⁺ and Fe³⁺ in tap water and seawater reached a rational range of 98.33~104.2% (Hg²⁺) and 98.85~104.80% (Fe³⁺), indicating the great potential of the as-prepared nanocomposites colorimetric chemosensor for practical applications.

SUBMITTER: Yang Y

PROVIDER: S-EPMC9504428 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature

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A Highly Selective and Sensitive Nano-Silver sol Sensor for Hg<sup>2+</sup> and Fe<sup>3+</sup>: Green Preparation and Mechanism.

Yang Yining Y Zhou Xiaodong X Dong Ruitao R Wang Yanwei Y Li Zichao Z Xue Yun Y Li Qun Q

Polymers 20220907 18

The development of highly selective and highly sensitive nanometer colorimetric chemical sensors is an urgent requirement in the immediate detection of heavy metal ions. In this work, silver-nanoparticle (Ag NPs)-based chemosensors were prepared by a simple and green method, in which the silver nitrate, carboxymethyl cellulose sodium (CMS) and Polyvinylpyrrolidone (PVP), and glucose are used as the silver source, double stabilizer and green reductant, respectively. The obtained colloidal CMS/PVP ...[more]

PMID: 36145888

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Project description:Hedychium coronarium (Hc) (commonly known as Gulbakawali) leaf extract was used for the stable and sustainable green synthesis of silver nanoparticles (Hc-AgNPs), which were biodegradable and non-toxic. Hedychium coronarium leaf extract was used as a reducing agent to stabilize the Hc-AgNPs by converting Ag+ to Ag0 without adding any capping agent. It demonstrated stability for up to six months, and no agglomeration was observed. The Hc-AgNPs were characterized using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), ultraviolet-visible spectrophotometry, and fluorescence spectroscopy analysis. The UV-visible spectrum supported the formation of stable Hc-AgNPs by displaying a strong surface plasmon resonance (SPR) peak at 440 nm. FT-IR spectra showed the functional groups present in the leaf extract of Hedychium coronarium, which was the primary source of secondary metabolites attached to Ag0. XRD analysis revealed a distinct 2θ peak of Hc-AgNPs at 38.15°, indicating a face-centred cubic structure with a crystallite size of 22.6 ± 1 nm at the (111) plane. Moreover, TEM demonstrated the spherical morphology of the Hc-AgNPs with an average particle size of 22.42 ± 1 nm. The photophysical characteristics of the Hc-AgNPs, as highlighted by their UV-vis and fluorescence characteristics, revealed their semiconducting nature with an impressive band gap (E g) value of 3.78 eV. Fascinatingly, the fluorescence activity of Hc-AgNPs at 504 nm showed a broad emission band corresponding to the absorption band at 251 nm. We performed the selective colorimetric sensing of Sn2+ metal ions using Hc-AgNPs, which demonstrated a detection limit of 10-3 M, suggesting their potential as very good solid biosensors. Interestingly, the Hc-AgNPs showed antifungal activity, which has not been reported before. Specifically, the results showed that the Hc-AgNPs had a higher fungitoxicity effect against Aspergillus flavus (59.58 ± 3.68) than against Fusarium oxysporum (57.93 ± 4.18). The antibacterial activity of the Hc-AgNPs was evaluated against three Gram-negative phytopathogenic bacteria: Xanthomonas oryzae (X. oryzae), Ralstonia solanacearum (R. solanacearum), and Erwinia carotovora (E. carotovora), showing effective inhibition zones of 16.33 ± 0.57, 15.33 ± 0.57, and 14.33 ± 0.57 mm, respectively. These results indicate that the Hc-AgNPs could inhibit these phytopathogenic bacteria with varying degrees of effectiveness in the order of X. oryzae > R. solanacearum > E. carotovora.

Dataset Information

A Highly Selective and Sensitive Nano-Silver sol Sensor for Hg²⁺ and Fe³⁺: Green Preparation and Mechanism.

Publications

A Highly Selective and Sensitive Nano-Silver sol Sensor for Hg<sup>2+</sup> and Fe<sup>3+</sup>: Green Preparation and Mechanism.

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Dataset Information

A Highly Selective and Sensitive Nano-Silver sol Sensor for Hg2+ and Fe3+: Green Preparation and Mechanism.

Publications

A Highly Selective and Sensitive Nano-Silver sol Sensor for Hg<sup>2+</sup> and Fe<sup>3+</sup>: Green Preparation and Mechanism.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets

A Highly Selective and Sensitive Nano-Silver sol Sensor for Hg²⁺ and Fe³⁺: Green Preparation and Mechanism.