A ratiometric fluorescence-scattered light strategy based on MoS2 quantum dots/CoOOH nanoflakes system for ascorbic acid detection

Wu, Zhihao; Nan, Danyang; Yang, Huan; Pan, Shuang; Hui, Liu; Hu, Xiaoli

doi:10.1016/j.aca.2019.09.054

Cited by 51 publications

(19 citation statements)

References 54 publications

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“…Moreover, consequent fluorescence recovery and the decrease of SOS were respectively attributed to the elimination of the CD self-quenching effect 25,43 and the decline of the material size, which deprived the scattering of ZIF-90. 26,27,38 Optimization of Experimental Parameters. Experimental conditions were investigated to achieve excellent sensitivity for PO 4 3− detection.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Fluorescence-Scattering Dual-Signal Response of Carbon Dots@ZIF-90 for Phosphate Ratiometric Detection

Yang

Pan

et al. 2020

ACS Sens.

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Ratiometric fluorescence has drawn extensive attention owing to its self-calibration property. However, it is difficult to obtain appropriate fluorescent materials that can be excited under one excitation and possess well-resolved signals simultaneously. In this work, with the optical properties of the fluorescence of carbon dots (CDs) and the second-order scattering (SOS) of ZIF-90 (zeolitic imidazole frameworks-90) nanoparticles, the synthesized CDs@ZIF-90 can be applied to phosphate (PO 4 3− ) ratiometric detection. The fluorescence of CDs is greatly suppressed through encapsulating CDs into ZIF-90. Nevertheless, the SOS is quite obvious due to the high scattering intensity of large size ZIF-90. The competitive coordination between PO 4 3− and the metal node of ZIF-90 decomposes CDs@ZIF-90, leading to the restoration of fluorescence and the diminution of SOS. On the basis of the PO 4 3− -induced ZIF-90 decomposition and CD release, a novel method for PO 4 3− ratiometric detection is developed through the dual-signal response of the fluorescence scattering. Under the optimal condition, the method shows a linear range from 1.0 to 50.0 μmol L −1 with a detection limit of 0.23 μmol L −1 . Furthermore, the probes are employed to assess PO 4 3− in practical aqueous samples successfully. Compared with the traditional approach, which only records fluorescence signals, the method reported here provides a new strategy to design ratiometric sensors by fluorescence and scattering.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Fluorescence-Scattering Dual-Signal Response of Carbon Dots@ZIF-90 for Phosphate Ratiometric Detection

Yang

Pan

et al. 2020

ACS Sens.

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“…Two‐dimension nanomaterials such as cobalt oxyhydroxide (CoOOH) nanosheets have been gaining attention as a new class of colorimetric probes and fluorometric quenchers due to their desirable physicochemical properties. [ 14,15 ] All most all of CoOOH nanosheets based probes have been reported to determine ascorbic acid due to its reducing property. [ 15–19 ] To the best of our knowledge, until now there has been no report on the utilization of CoOOH nanosheets for the detection of isoniazid.…”

Section: Introductionmentioning

confidence: 99%

“…[ 14,15 ] All most all of CoOOH nanosheets based probes have been reported to determine ascorbic acid due to its reducing property. [ 15–19 ] To the best of our knowledge, until now there has been no report on the utilization of CoOOH nanosheets for the detection of isoniazid.…”

Section: Introductionmentioning

confidence: 99%

A turn off–on fluorometric and paper‐based colorimetric dual‐mode sensor for isoniazid detection

2021

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In the present study, cobalt oxyhydroxide (CoOOH) nanosheets were applied for establishing a dual fluorometric and smartphone‐paper‐based colorimetric method to detect isoniazid. CoOOH nanosheets quenched the fluorescence emission of sulfur and nitrogen co‐doped carbon dots (S,N‐CDs) due to inner filter effect (IFE). The quenched fluorescence intensity of S,N‐CDs restored in the presence of isoniazid due to destroying CoOOH nanosheets by this drug. Moreover, with adding isoniazid the solution color of CoOOH nanosheets altered from brownish yellow to pale yellow. We exploited these facts to design a turn off–on fluorometric and paper‐based colorimetric sensor for isoniazid measurement at the range 0.5–5 and 5–100 μM with detection limits of 0.28 μM and 4.0 μM, respectively. The introduced dual sensor was used for pharmaceutical, environmental and biological analysis of isoniazid with satisfactory results. The paper‐based colorimetric sensor can be applied for isoniazid portable monitoring using a smartphone as a detector or even the naked eye.

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“…But as far as we know, quantitative As(V) detection using a thermometer as signal readout has not been reported. Recently, two-dimensional nanomaterials of cobalt oxyhydroxide (CoOOH) nanoflakes have attracted considerable attention due to their good water dispersibility, stability, and multifunctional catalysis, , and were widely used to build sensor platforms. , We thus designed a novel enhanced thermometric system for As(V) detection using an easily accessible thermometer as the signal output (Scheme ). The sensing principle relies on the fact that CoOOH nanoflakes, as an effective catalyst, can catalyze the decomposition of H 2 O 2 into O 2 and H 2 O, accompanied by a significant increase of pressure of the sealed reaction vessel, as well as an obvious temperature enhancement because of this exothermic reaction process (Δ H = −98.2 kJ/mol) .…”

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confidence: 99%

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confidence: 99%

Enhanced Thermometric Sensor for Arsenate Analysis Based on Dual Temperature Readout Signaling Strategy

et al. 2020

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New methods for portable detection of arsenate are still in urgent need. Herein, we explored a simple but sensitive thermometric strategy for arsenate determination without complex instruments and skilled technicians. Cobalt oxyhydroxide (CoOOH) nanoflakes, can ingeniously decompose hydrogen peroxide into oxygen in a sealed reaction vessel, accompanied by marked pressure and significant temperature increase due to the exothermic reaction effect (ΔH = −98.2 kJ/mol). The increased pressure then compelled a certain amount of H2O overflowing from the drainage device into another vessel, leading to a significant temperature decrease due to the preloaded ammonium nitrate (NH4NO3) and its good dissolution endothermic effect (ΔH = 25.4 kJ/mol). In the presence of arsenate, the catalytic activity of CoOOH nanoflakes for H2O2 decomposition was inhibited dramatically, resulting in an obvious decrease of the pressure, weighting water and temperature response. The two temperature responses with increasing and decreasing feature were easily measured through a common thermometer, and exhibited an effective signaling amplification via coupling both “signal-on” and “signal-off” temperature readout elements. The obtained dual superimposing temperature readout exhibits a good linear with the concentration of arsenate with a lower detection limit (51 nM, 3.8 ppb). Compared to the inductively coupled plasma mass spectrometry, this enhanced thermometric strategy provides a simple, rapid, convenient, low cost, and portable platform for sensing arsenate in real environmental water.

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A ratiometric fluorescence-scattered light strategy based on MoS2 quantum dots/CoOOH nanoflakes system for ascorbic acid detection

Cited by 51 publications

References 54 publications

Fluorescence-Scattering Dual-Signal Response of Carbon Dots@ZIF-90 for Phosphate Ratiometric Detection

Fluorescence-Scattering Dual-Signal Response of Carbon Dots@ZIF-90 for Phosphate Ratiometric Detection

A turn off–on fluorometric and paper‐based colorimetric dual‐mode sensor for isoniazid detection

Enhanced Thermometric Sensor for Arsenate Analysis Based on Dual Temperature Readout Signaling Strategy

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