Novel and potential chemical sensors for Au(III) ion detection and recovery in electric waste samples

Shahat, Ahmed; Mohamed, Mona H.; Awual, Md. Rabiul; Mohamed, Shaimaa K.

doi:10.1016/j.microc.2020.105312

Cited by 61 publications

(12 citation statements)

References 133 publications

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“…The mesoporous silica attracted attention because of its specific surface functionality, porous wall structure, biocompatibility, and hydrophilic design [13–22] . MSNSs (mesoporous silica nanospheres) were created and used as a scaffold for accommodating new ion chromophores in this study (Phimhb).…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the pore volume of the MSNss was 0.699 cm 3 /g, while the pore volume of the Phimhb sensor was 0.559 cm 3 /g. The Phimhb sensor still has a high surface area because incorporating the chromophore Phimhb molecules into the mesoporous silica surface is physical adsorption (van der Waals adsorption) [13–22] . The fact that the Phimhb chromophore is conserved both outside and inside the nanosphere may explain why Phimhb sensors have smaller pore widths and surface areas.…”

Section: Resultsmentioning

confidence: 99%

“…Many papers showed that the use of nanomaterials as a scaffold for immobilization of the reagents enhances their selectivity and sensitivity [13–22] . From this point of view, we tried to far away from the routine work and make a chemosensor.…”

Section: Introductionmentioning

confidence: 99%

“…Optical technologies enable in situ identification with the naked eye by modifying the color without the use of expensive instruments. As a result, numerous investigations on metal ion colorimetric sensing systems have been published [13–22] …”

Section: Introductionmentioning

confidence: 99%

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Development of a Sensitive and Selective Optical Sensor for Measuring Ultra‐Trace Amounts of Fe(II) and Fe(III) Ions in Water

Al‐Qahtani

Shah²,

Aljuhani³

et al. 2022

ChemistrySelect

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A smart spectrophotometric method for the analytical determination of iron concentration in whichever oxidation state was developed using a novel optical sensor. The optical sensor was prepared by direct immobilization of novel synthesized chromophore, 5‐(((1,10‐phenanthrolin‐5‐yl)imino)methyl)‐2‐hydroxybenzoic acid (Phimhb) onto mesoporous silica nanospheres (MSNSs). The novel Phimhb chromophore has two sites, one is selective to Fe(II) ions and the other is selective to Fe(III) ions. The ions′ color can be seen with the human eye and monitored using spectrophotometric techniques or a smartphone. The influence of several parameters on the evaluation of iron ions content was studied and optimized. The proposed method was validated in terms of LOD, LOQ, linearity, and precision according to ICH guidelines. The optical Phimhb sensor has wide linear dynamic ranges with low detection limits of 4.94 ppb (1.83×10−7 mol L−1) and 10.4 ppb (3.85×10−7 mol L−1) for Fe(II) and Fe(III), respectively. The response time of this sensor for both ions was 60 s. The Phimhb sensor could be reproduced multiple times and used with a higher capacity each time. The effect of potential interfering ions on the estimation of Fe(II) and Fe(III) was investigated. The outcomes clarified that the prepared Phimhb sensor was very selective to Fe(II) and Fe(III) ions. Therefore, the Phimhb sensor had been successfully used in the determination of Fe(II) and Fe(III) in real water even without any pre‐concentration, it has high specificity.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of a Sensitive and Selective Optical Sensor for Measuring Ultra‐Trace Amounts of Fe(II) and Fe(III) Ions in Water

Al‐Qahtani

Shah²,

Aljuhani³

et al. 2022

ChemistrySelect

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“…Consequently, it is possible to determine ultra-traces of Fe(III) ions using the two sensors with high sensitivity better than other spectrophotometric methods − as shown in Table . This may be attributed to the use of mesoporous silica nanotube nanomaterial as a carrier that boosted the sensitive property of the immobilized reagents (formylsalicylic acids), resulting in the high sensitivity of the 3-fsa-MSNT and 5-fsa-MSNT sensors. ,− It appears from Table that the 5-fsa-MSNT sensor has a lower LOD than the 3-fsa-MSNT sensor, and this may be because the positions of the hydroxyl and carboxylic groups are farther from the formyl group in the 5-fsa-MSNT structure than in the 3-fsa-MSNT structure. This makes the hydroxyl and carboxylic groups in the 5-fsa-MSNTs directed to the solution and easily react with the Fe(III) ions.…”

Section: Results and Discussionmentioning

confidence: 99%

Spectrophotometric and Fluorometric Methods for the Determination of Fe(III) Ions in Water and Pharmaceutical Samples

2021

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Chemical sensors based on mesoporous silica nanotubes (MSNTs) for the quick detection of Fe(III) ions have been developed. The nanotubes’ surface was chemically modified with phenolic groups by reaction of the silanol from the silica nanotubes surface with 3-aminopropyltriethoxysilane followed by reaction with 3-formylsalicylic acid (3-fsa) or 5-formylsalicylic acid (5-fsa) to produce the novel nanosensors. The color of the resultant 3-fsa-MSNT and 5-fsa-MSNT sensors changes once meeting a very low concentration of Fe(III) ions. Color changes can be seen by the naked eye and tracked with a smartphone or fluorometric or spectrophotometric techniques. Many experimental studies have been conducted to find out the optimum conditions for colorimetric and fluorometric determining of the Fe(III) ions by the two novel sensors. The response time, for the two sensors, that is necessary to achieve a steady spectroscopic signal was less than 15 s. The suggested methods were validated in terms of the lowest limit of detection (LOD), the lowest limit of quantification (LOQ), linearity, and precision according to International Conference on Harmonization (ICH) guidelines. The lowest limit of detection that was obtained from the spectrophotometric technique was 18 ppb for Fe(III) ions. In addition, the results showed that the two sensors can be used eight times after recycling using 0.1 M EDTA as eluent with high efficiency (90%). As a result, the two sensors were successfully used to determine Fe(III) in a variety of real samples (tap water, river water, seawater, and pharmaceutical samples) with great sensitivity and selectivity.

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Synthesis and application of a novel self‐smart sensor based on a modified amino‐functionalized Zr‐metal–organic framework for rapid and selective detection of some toxic metals in wastewater

El‐Bindary

Shahat

El‐Deen

et al. 2023

Applied Organom Chemis

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In this study, a simple optical luminescence smart sensor derived from organic ligand‐based metal–organic framework material with high oxidation state central metal (Zr4+) was developed. It also was screened to achieve Fe3+, Pb2+, and Co2+ sensitive detection through the strong coordination of amino groups or nitrogen center with 2‐acetylpyridine ligand. The intrinsic optical and fluorescence intensities of sensor were regulated by the ligand‐to‐metal charge transfer effect. The new sensor exhibits an excellent selectivity, ultrafast detection of Fe3+, Pb2+, and Co2+ ions in water with good detection limits (LODs and LOQs). Fluorometric and UV–Vis absorption spectroscopies were used to conduct the study. Brunauer, Emmett, and Teller, Fourier transform infrared (FT‐IR); X‐ray diffraction spectrometry; and X‐ray Photoelectron Spectroscopy were used to confirm the structure of the novel sensor. A real industrial wastewater sample was investigated against the synthesized sensor with a powerful detection efficiency.

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Novel and potential chemical sensors for Au(III) ion detection and recovery in electric waste samples

Cited by 61 publications

References 133 publications

Development of a Sensitive and Selective Optical Sensor for Measuring Ultra‐Trace Amounts of Fe(II) and Fe(III) Ions in Water

Development of a Sensitive and Selective Optical Sensor for Measuring Ultra‐Trace Amounts of Fe(II) and Fe(III) Ions in Water

Spectrophotometric and Fluorometric Methods for the Determination of Fe(III) Ions in Water and Pharmaceutical Samples

Synthesis and application of a novel self‐smart sensor based on a modified amino‐functionalized Zr‐metal–organic framework for rapid and selective detection of some toxic metals in wastewater

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