Ultrasound-Assisted Synthesis of Hybrid Phosphomolybdate–Polybenzidine Containing Silver Nanoparticles for Electrocatalytic Detection of Chlorate, Bromate and Iodate Ions in Aqueous Solutions

Analysis of Fe3+ ion present in aqueous solutions is always of interests. Recently, this ion has been analyzed by colorimetric methods using colloid of silver nanoparticles (AgNPs) in capping agents of polymers. The reaction mechanism between AgNPs and Fe3+ is still subject to the further investigation. In this work, 1,10-phenanthroline was used to probe the reaction mechanism between AgNPs and Fe3+ ion in the solution. The colloids of AgNPs were prepared in the polyvinyl alcohol (PVA) solution and reacted with Fe3+. The colloid surface plasmon absorbance decreases linearly along with the increase in Fe3+ concentration. The addition of 1,10-phenanthroline to mixture changes the solution to red, indicating that the reaction produces Fe2+. This suggests that the reduction of the AgNPs absorbance is the result of oxidation of the Ag nanoparticles along with the reduction of Fe3+.

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Sequential microwave-ultrasound-assisted silver nanoparticles synthesis: A swift approach, their antioxidant, antimicrobial, and in-silico studies

Journal of Molecular Liquids ◽

10.1016/j.molliq.2021.117954 ◽

2021 ◽

pp. 117954

Author(s):

Venkataraghavan Ragunathan ◽

Chithra Kumaran

Keyword(s):

Silver Nanoparticles ◽

In Silico ◽

In Silico Studies ◽

Nanoparticles Synthesis ◽

Ultrasound Assisted

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Synthetic sodalite doped with silver nanoparticles: Characterization and mercury (II) removal from aqueous solutions

Journal of Environmental Science and Health Part A ◽

10.1080/10934529.2019.1611129 ◽

2019 ◽

Vol 54 (9) ◽

pp. 951-959 ◽

Cited By ~ 5

Author(s):

Z. Tauanov ◽

P. E. Tsakiridis ◽

D. Shah ◽

V. J. Inglezakis

Keyword(s):

Silver Nanoparticles ◽

Aqueous Solutions ◽

Nanoparticles Characterization

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Humic Acid Functionalized - Silver Nanoparticles as Nanosensor for Colorimetric Detection of Copper (II) Ions in Aqueous Solutions

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.831.142 ◽

2020 ◽

Vol 831 ◽

pp. 142-150

Author(s):

Edgar Clyde R. Lopez ◽

Michael Angelo Zafra ◽

Jon Nyner L. Gavan ◽

Emil David A. Villena ◽

Francis Eric P. Almaquer ◽

...

Keyword(s):

Silver Nanoparticles ◽

Humic Acid ◽

Aqueous Solutions ◽

Limit Of Detection ◽

Colorimetric Detection ◽

Hydrodynamic Diameter ◽

Limit Of Quantification ◽

Local Surface Plasmon Resonance ◽

Optical Absorbance ◽

Absorbance Spectra

Humic acid - functionalized silver nanoparticles (HA-AgNPs) were successfully synthesized and used to detect Cu (II) ions in aqueous solutions. The HA-AgNPs was shown to have an average hydrodynamic diameter of 101.4 nm and a polydispersity index of 0.447. The absorbance spectra of HA-AgNPs showed the characteristic local surface plasmon resonance (LSPR) peak of AgNPs at 408.3 nm. Addition of Cu (II) in the HA-AgNPs led to their agglomeration as evidenced by the change in their surface morphology and their corresponding optical absorbance spectra. The synthesized HA-AgNPs showed a strong linear response for Cu (II) concentrations in the range of 0.00 – 1.25 mM with a limit of detection (LoD) of 4.4428 ± 0.1091 mg L-1, a limit of quantification (LoQ) of 14.8094 ± 0.3636 mg L-1, and a limit of blank (LoB) of 0.1214 ± 0.0065 mg L-1. Statistical analysis showed that this calibration curve could be used to quantify Cu (II) concentrations within a 95% confidence level. Furthermore, HA-AgNPs was found to be selective for Cu (II) detection based on the selectivity study against common metal ions found in drinking water. This shows that the synthesized HA-AgNPs can be used as an environment-friendly colorimetric nanosensor for rapid and point-of-need quantification of Cu (II) ions in aqueous media.

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