A designed miniature sensor for the trace level detection and degradation studies of the toxic dye Rhodamine B

Hayat, Mazhar; Shah, Afzal; Hakeem, Muhammad Kamran; Irfan, Muhammad; Haleem, Abdul; Khan, Sher Bahadar; Shah, Iltaf

doi:10.1039/d2ra01722a

Cited by 10 publications

(8 citation statements)

References 51 publications

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“…As a result, when compared to the surface-assisted/adsorption process, the diffusion-controlled mechanism is less likely. A linear positive shift between E p and log ν suggests the irreversibility of BG oxidation, according to the Laviron equation …”

Section: Resultsmentioning

confidence: 99%

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Multiwalled Carbon Nanotube/Fe-Doped ZnO-Based Sensors for Droplet Electrochemical Detection and Degradation Monitoring of Brilliant Green

Aslam

Shah

Ullah

et al. 2023

ACS Appl. Nano Mater.

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The present research work aims to contribute toward the sustainable development goal of water cleanliness by monitoring and removing toxic effluents from wastewater. Herein, we present an electrochemical sensing platform made of a glassy carbon electrode modified with Fe-doped ZnO nanoparticles (NPs) and multiwalled carbon nanotubes (MWCNTs) for the detection of brilliant green (BG) using a smart droplet analysis approach. The Fe−ZnO NPs were synthesized via a hydrothermal method and characterized by various analytical techniques such as UV−visible spectroscopy, XRD, SEM, EDX, and FTIR spectroscopy. Fe−ZnO NPs were found to act as a mediator between the transducer and BG for efficient electron transport, while MWCNTs led to the enhanced current response of BG at the electrode surface owing to their conductive and adsorptive characteristics. Under optimized conditions of pH 6, 0.1 V deposition potential, and 40 s deposition time, a 0.40 nM limit of detection was achieved at the designed nanosensor. Photocatalytic degradation of the dye with NPs was also investigated in different pH media using UV−visible spectroscopy. The dye was found to photocatalytically degrade up to 99% in just 30 min, following firstorder kinetics with a rate constant of 0.14 min −1 . The photocatalytic degradation was also monitored electrochemically at the designed sensing platform, and the findings were found to be in good agreement with the results of UV−visible spectroscopy. The developed electrochemical droplet analysis approach is not only economical but also efficient, ultra-sensitive, and environmentally friendly.

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Section: Resultsmentioning

confidence: 99%

“…A linear positive shift between E p and log ν suggests the irreversibility of BG oxidation, according to the Laviron equation. 50 3.4. Optimization of Experimental Parameters.…”

Section: Effect Of Scanmentioning

confidence: 99%

Multiwalled Carbon Nanotube/Fe-Doped ZnO-Based Sensors for Droplet Electrochemical Detection and Degradation Monitoring of Brilliant Green

Aslam

Shah

Ullah

et al. 2023

ACS Appl. Nano Mater.

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“…The LOD is found to be 2.2 nM – which is highly sensitive and rationally appropriate towards detection of RhB, in comparison to formerly reported optical sensors/other methods having disadvantages associated with single wavelength-based detection, budget efficacy, difficult fabrication procedure and sensitivity (Table S3, ESI†). 3,4,19–23 Remarkably, the S-QDCs display changes in their emission color from green to yellowish orange to intense orange along with changes in color chromaticity coordinates from (0.29, 0.46) to (0.49, 0.46) to (0.56, 0.42) upon the treatment of RhB (Fig. 2A and B).…”

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confidence: 96%

Surfactant-mediated enhanced FRET from a quantum-dot complex for ratiometric sensing of food colorants

Singha,

Manna,

Das

et al. 2023

Chem. Commun.

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“…Different chemical approaches were implemented for the chemical degradation of water-soluble dyes, such as degradation of dyes using a reducing agent (chemical method), electrochemical method, coagulation–flocculation, and advanced oxidation approaches. Among the approaches mentioned above, the electrochemical degradation route is more expensive than other approaches for dye degradation [ 199 ]. The main reason for reduced implementation of the electrochemical approach is high energy consumption, the requirement for more chemicals, and costly equipment [ 200 , 201 ].…”

Section: Chemical Degradation Approaches For Water-soluble Dyes and N...mentioning

confidence: 99%

A Comprehensive Review on Adsorption, Photocatalytic and Chemical Degradation of Dyes and Nitro-Compounds over Different Kinds of Porous and Composite Materials

et al. 2023

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Dye and nitro-compound pollution has become a significant issue worldwide. The adsorption and degradation of dyes and nitro-compounds have recently become important areas of study. Different methods, such as precipitation, flocculation, ultra-filtration, ion exchange, coagulation, and electro-catalytic degradation have been adopted for the adsorption and degradation of these organic pollutants. Apart from these methods, adsorption, photocatalytic degradation, and chemical degradation are considered the most economical and efficient to control water pollution from dyes and nitro-compounds. In this review, different kinds of dyes and nitro-compounds, and their adverse effects on aquatic organisms and human beings, were summarized in depth. This review article covers the comprehensive analysis of the adsorption of dyes over different materials (porous polymer, carbon-based materials, clay-based materials, layer double hydroxides, metal-organic frameworks, and biosorbents). The mechanism and kinetics of dye adsorption were the central parts of this study. The structures of all the materials mentioned above were discussed, along with their main functional groups responsible for dye adsorption. Removal and degradation methods, such as adsorption, photocatalytic degradation, and chemical degradation of dyes and nitro-compounds were also the main aim of this review article, as well as the materials used for such degradation. The mechanisms of photocatalytic and chemical degradation were also explained comprehensively. Different factors responsible for adsorption, photocatalytic degradation, and chemical degradation were also highlighted. Advantages and disadvantages, as well as economic cost, were also discussed briefly. This review will be beneficial for the reader as it covers all aspects of dye adsorption and the degradation of dyes and nitro-compounds. Future aspects and shortcomings were also part of this review article. There are several review articles on all these topics, but such a comprehensive study has not been performed so far in the literature.

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A designed miniature sensor for the trace level detection and degradation studies of the toxic dye Rhodamine B

Abstract: The presence of organic pollutants in water and food samples is a risk for the environment.

Cited by 10 publications

References 51 publications

Multiwalled Carbon Nanotube/Fe-Doped ZnO-Based Sensors for Droplet Electrochemical Detection and Degradation Monitoring of Brilliant Green

Multiwalled Carbon Nanotube/Fe-Doped ZnO-Based Sensors for Droplet Electrochemical Detection and Degradation Monitoring of Brilliant Green

Surfactant-mediated enhanced FRET from a quantum-dot complex for ratiometric sensing of food colorants

A Comprehensive Review on Adsorption, Photocatalytic and Chemical Degradation of Dyes and Nitro-Compounds over Different Kinds of Porous and Composite Materials

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