Rapid removal of anionic organic dye from contaminated water using a poly(3-aminobenzoic acid/graphene oxide/cobalt ferrite) nanocomposite low-cost adsorbent via adsorption techniques

Arabian Journal of Chemistry, Journal Year: 2022, Volume and Issue: 15(12), P. 104318 - 104318

Published: Oct. 3, 2022

Language: Английский

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Polypyrrole-coated zinc/nickel oxide nanocomposites as adsorbents for enhanced removal of Pb(II) in aqueous solution and wastewater: An isothermal, kinetic, and thermodynamic study

Journal of Water Process Engineering, Journal Year: 2024, Volume and Issue: 64, P. 105589 - 105589

Published: June 13, 2024

Language: Английский

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Rapid Detection of Mercury Ions Using Sustainable Natural Gum-Based Silver Nanoparticles

Catalysts, Journal Year: 2022, Volume and Issue: 12(11), P. 1464 - 1464

Published: Nov. 18, 2022

Fabrication of metal nanostructures using natural products has attracted scientists and researchers due to its renewable environmentally benign availability. This work prepared an eco-friendly, low-cost, rapid colorimetric sensor silver nanoparticles tree gum as a reducing stabilizing agent. Several characterization techniques have been exploited describe the synthesized nanosensor morphology optical properties. Ultraviolet−Visible (UV−Vis) spectroscopy used for monitoring localized plasmon surface area. High-resolution transmission electron microscopy (HR-TEM) illustrated size shape nanoparticles. X-ray diffraction spectra showed crystallography purity product. Silver decorated with almond molecules (AgNPs@AG) demonstrated high sensitivity detection mercury ions in water samples. The method is based on aggregation AgNPs disappearing yellow color via spectrophotometer. limit this was reported be 0.5 mg/L. aimed synthesize rapid, easy-preparation, efficient naked-eye detect toxic pollutants aqueous

Language: Английский

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Green Synthesis of Silver Nanoparticles Using Artemisia vulgaris Extract and Its Application toward Catalytic and Metal-Sensing Activity

Inorganics, Journal Year: 2022, Volume and Issue: 10(8), P. 113 - 113

Published: Aug. 4, 2022

Nonessential heavy metals are toxic to human health. In this study, mercury, a hazardous metal, was detected by colorimetric analysis using Artemisia vulgaris-mediated silver nanoparticles (AgNP) without any modification in an aqueous solution. The UV–vis spectroscopy showed characteristic SPR band of Ag0 at 418 nm, indicating the formation AgNPs. AgNPs were crystalline, with average size 7 as calculated from XRD data. SEM images revealed spherical and polycrystalline within agglomerated form. FTIR spectra elucidated functional group extract attached Ag0. broad, strong peak 3632 cm−1 indicated involvement -OH compounds reducing ions. EDX around 3 keV confirmed nanostructure. A method employed for metal sensing medium suspension. obtained found be selective highly sensitive toward Hg2+ suspension turned colorless after adding 380 µL 1 mM Hg2+. synthesized catalytic activity on reduction 4-nitrophenol presence NaBH4 8 min rate constant 1.21 × 10−2 s−1. outcome these findings suggests that application vulgaris influenced green catalysis.

Language: Английский

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Recent Progress in Electrochemical Aptasensors: Construction and Application

Chemosensors, Journal Year: 2023, Volume and Issue: 11(9), P. 488 - 488

Published: Sept. 4, 2023

Electrochemical aptasensors have gained significant attention due to their exceptional sensitivity, selectivity, stability, and rapid response, combining the advantages of electrochemical techniques with specific recognition ability aptamers. This review aims provide a comprehensive summary recent advances in aptasensors. Firstly, construction method are introduced. Subsequently, highlights application progress detecting various chemical biological molecules, including metal ions, small drugs, proteins, exosomes, tumor cells, bacteria, viruses. Lastly, prospects challenges associated discussed.

Language: Английский

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Machine Learning Assisted Metal Oxide‐Bismuth Oxy Halide Nanocomposite for Electrochemical Sensing of Heavy Metals in Aqueous Media

Crystal Research and Technology, Journal Year: 2024, Volume and Issue: 59(5)

Published: Jan. 18, 2024

Abstract Heavy metal in excess quantity is one of the major inorganic pollutants water. It causes several hazards to human life and ecosystem. exists traces most commonly available drinking water sources from lakes, ponds, wells, etc., However, their presence treated relatively significant. As primarily used for agricultural purposes, it necessary monitor measure concentration. This requires sensing metals aqueous medium with good sensitivity stability. Recently, nanosensors coupled electrochemical transducer preferred analyzing heavy solutions. In this work, Silver oxide‐bismuth oxy bromide coated nafion proposed as an sensor detection ions solution. Cyclic voltammetry (CV) behavior electrode observed different electrolytes. Further, Differential Pulse Voltammetry (DPV) study shows that current increases trace nickel copper machine learning (ML) algorithms such Naïve Bayes, ANN, SVM decision trees are employed train cyclic data evaluate its performance. Bayes algorithm provides best accuracy 93.2% among all models.

Language: Английский

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2D MXene-Based Nanoscale Materials for Electrochemical Sensing Toward the Detection of Hazardous Pollutants: A Perspective

Critical Reviews in Analytical Chemistry, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 46

Published: July 24, 2024

MXenes (M

Language: Английский

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An Electrochemical Sensor Based on a Porous Biochar/Cuprous Oxide (BC/Cu2O) Composite for the Determination of Hg(II)

Molecules, Journal Year: 2023, Volume and Issue: 28(14), P. 5352 - 5352

Published: July 12, 2023

Mercuric ion (Hg2+) in aqueous media is extremely toxic to the environment and organisms. Therefore, ultra-trace electrochemical determination of Hg2+ critical importance. In this work, a new sensing platform based on porous activated carbon (BC/Cu2O) modified with cuprous oxide was developed using simple impregnation pyrolysis method. Differential pulse anodic stripping voltammetry (DPASV) used investigate capability BC/Cu2O electrode towards Hg2+. Due excellent conductivity large specific surface area BC, catalytic activity Cu2O nanoparticles, prepared exhibited activity. The high sensitivity proposed system resulted low detection limit 0.3 ng·L-1 wide linear response ranges from 1.0 mg·L-1. addition, sensor found have good accuracy, acceptable precision, reproducibility. All these results show that composite promising material for detection.

Language: Английский

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Electrochemical Analysis of Heavy Metal Ions Using Conducting Polymer Interfaces

Electrochem, Journal Year: 2022, Volume and Issue: 3(3), P. 492 - 506

Published: Aug. 26, 2022

Conducting polymers (CPs) are highly conjugated organic macromolecules, where the electrical charge is transported in intra- and inter-chain pathways. Polyacetylene, polythiophene its derivatives, polypyrrole polyaniline among best-known examples. These compounds have been used as electrode modifiers to gain sensitivity selectivity a large variety of analytical applications. This review, after brief introduction electrochemistry CPs, summarizes application CPs’ interfaces towards heavy metals’ detection using potentiometry, pulse anodic stripping voltammetry, alternative non-classical electrochemical methods.

Language: Английский

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Recent advances in the modification of electrodes for trace metal analysis: a review

The Analyst, Journal Year: 2023, Volume and Issue: 148(23), P. 5805 - 5821

Published: Jan. 1, 2023

Modifications of electrodes for trace metal analysis reported in the last five years are summarized. Nanomaterials, polymers, and film-forming substances most used modifiers.

Language: Английский

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