Ultrasensitive detection of Cr(VI) using a novel SERS optical fiber probe modified by dual-functional methimazole

Long, Yuting; Li, Hong; Wang, Wenbo; Yang, Xinxin; Liu, Zirui

doi:10.1016/j.jallcom.2022.164916

Cited by 26 publications

(14 citation statements)

References 38 publications

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“…The LoD obtained in this study is 50× less than the MCL for Cr(VI) and comparable to most of the reports in the literature. The SERS-based method has been reported to offer 3 orders better LoDs, though the selectivity of the methimazole receptor toward Cr(VI) has not been discussed in detail . To the best of our knowledge, there are no commercial FOSs available either for Cr or any other heavy metal detection.…”

Section: Resultsmentioning

confidence: 99%

“…The SERSbased method has been reported to offer 3 orders better LoDs, though the selectivity of the methimazole receptor toward Cr(VI) has not been discussed in detail. 15 To the best of our knowledge, there are no commercial FOSs available either for Cr or any other heavy metal detection. At the same time, the current approach of MOF-coated FOS probes and the compact setup not only offer great potential for commercialization of Cr(VI) sensors, but it can also be extended to various other heavy metal ions.…”

Section: Methodsmentioning

confidence: 99%

“…In another study, a surface-enhanced Raman scattering-based optical fiber probe functionalized with silver nanoparticles and methimazole was employed for Cr detection. 15 Although these studies demonstrated high sensitivity, the selectivity toward Cr(VI) was not well established in real samples. A substantial sensitivity with selectivity is highly desirable for field-deployable Cr(VI) sensors.…”

mentioning

confidence: 99%

“…The stimulus-responsive swelling properties of the receptor were exploited for quantifying Cr(VI). In another study, a surface-enhanced Raman scattering-based optical fiber probe functionalized with silver nanoparticles and methimazole was employed for Cr(VI) detection . Although these studies demonstrated high sensitivity, the selectivity toward Cr(VI) was not well established in real samples.…”

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confidence: 99%

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Metal–Organic Framework-Based Fiber Optic Sensor for Chromium(VI) Detection

et al. 2023

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This study demonstrates a novel fiber optic sensing strategy for selective adsorption and rapid detection of Cr(VI) ions by exploiting a suitable metal−organic framework matrix and the characteristic spectral absorption of Cr(VI) at 395 nm wavelength, respectively. U-bent fiber optic sensor (U-FOS) probes that exhibit remarkably high evanescent wave-based absorbance sensitivity were employed to efficiently detect the Cr(VI) ions that are adsorbed to a stable zeolitic imidazolate framework (ZIF-67) matrix immobilized on the probe surface. A facile technique was developed for the fabrication of ZIF-67-coated U-FOS probes (FOS/ZIF-67) involving an in situ deposition process followed by heat treatment. Selectivity of the FOS/ZIF-67 probes to Cr(VI) was confirmed by optical absorption spectral investigations with 14 other heavy metals and interfering ions. The sensor performance was evaluated with a compact light-emitting diode-photodetectorbased setup. FOS/ZIF-67 probes demonstrate an ability to detect Cr(VI) ions with a limit of detection of 1 ppb and a wide linear dynamic range from 0.005 to 100 ppm within a short response time of 5 to 10 min. These sensors show good recovery rates with real water samples and a shelf-life of at least 4 weeks under ambient conditions, thereby demonstrating their viability for real-world application.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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Metal–Organic Framework-Based Fiber Optic Sensor for Chromium(VI) Detection

et al. 2023

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“…So far, a series of approaches have been developed for detection of Cr(VI), such as electrochemistry, 6,7 uorescence, 8,9 atomic absorption spectroscopy, 10,11 colorimetry, 12,13 and surface enhancement Raman spectroscopy (SERS). 14,15 Although some methods allow detection of Cr(VI) with high sensitivity and selectivity, they require complicated instruments and experienced technicians, which are not suitable for on-site analysis. Colorimetric methods based on the color change of the reaction system can be realized via visual observation by the naked eye or spectrophotometer scanning, which is simple, low-cost, convenient and rapid.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast colorimetric detection of Cr(vi) using Fe₃O₄@polydopamine/Prussian blue composites as a highly efficient peroxidase mimic

Guo

Lei

2023

Anal. Methods

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A novel approach to Hg²⁺ determination in water samples using carbon dots based on paper and fluorescence digital image analysis

Maia,

Suarez,

dos Santos

et al. 2024

J of Chemical Tech & Biotech

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BACKGROUNDThis work proposes the use of a simple inexpensive method for the hydrothermal synthesis of fluorescent carbon dots nanoparticles (CDs) from rice starch aimed at the determination of Hg2+ in water. The proposed method involved using a paper‐based analytical device coupled to a 3D plate, with a UV‐LED chamber and a smartphone for the acquisition and analysis of the fluorescence digital images of the CDs.RESULTSThe size of the carbon dots ranged from 0.5 to 3 nm, with an average particle size of approximately 1 nm. The functionalization of carbon dots with methimazole allowed a high selective for Hg2+ determination. The results obtained showed a linear response R2 of 0.997 and Hg2+ concentration in the range of 0.5 to 45.0 μΜ with a LOD and LOQ of 0.23 and 0.62 μmol L‐1, respectively. The results of the study show that there are no significant differences, at 95% confidence level, between the data obtained from the application of the proposed method and the reference method.CONCLUSIONThe proposed method is in line with the principles of green chemistry, as it involves the use of renewable sources for starch extraction and a hydrothermal synthesis process that does not employ toxic reagents. In addition, the method employs only 15 μL of reagent/sample.This article is protected by copyright. All rights reserved.

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Ultrasensitive detection of Cr(VI) using a novel SERS optical fiber probe modified by dual-functional methimazole

Cited by 26 publications

References 38 publications

Metal–Organic Framework-Based Fiber Optic Sensor for Chromium(VI) Detection

Metal–Organic Framework-Based Fiber Optic Sensor for Chromium(VI) Detection

Ultrafast colorimetric detection of Cr(vi) using Fe₃O₄@polydopamine/Prussian blue composites as a highly efficient peroxidase mimic

A novel approach to Hg²⁺ determination in water samples using carbon dots based on paper and fluorescence digital image analysis

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Ultrasensitive detection of Cr(VI) using a novel SERS optical fiber probe modified by dual-functional methimazole

Cited by 26 publications

References 38 publications

Metal–Organic Framework-Based Fiber Optic Sensor for Chromium(VI) Detection

Metal–Organic Framework-Based Fiber Optic Sensor for Chromium(VI) Detection

Ultrafast colorimetric detection of Cr(vi) using Fe3O4@polydopamine/Prussian blue composites as a highly efficient peroxidase mimic

A novel approach to Hg2+ determination in water samples using carbon dots based on paper and fluorescence digital image analysis

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Ultrafast colorimetric detection of Cr(vi) using Fe₃O₄@polydopamine/Prussian blue composites as a highly efficient peroxidase mimic

A novel approach to Hg²⁺ determination in water samples using carbon dots based on paper and fluorescence digital image analysis