Cobalt metal–organic framework-based ZIF-67 for the trace determination of herbicide molinate by ion mobility spectrometry: investigation of different morphologies

Davoodi, Mehdi; Davar, Fatemeh; Rezayat, Mohammad; Jafari, Mohammad T.; Shalan, Ahmed Esmail

doi:10.1039/d0ra09298c

Cited by 26 publications

(9 citation statements)

References 46 publications

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“…To achieve further information related to the composition and distribution of the CdSe nanoparticles, energy-dispersive X-ray spectroscopy (EDX) and EDS mapping were performed as shown in Figure a,b, respectively. Usually, the EDX analysis is not an accurate way of identifying elements with a low atomic number . Overall, the EDX analysis (Figure a) confirmed the presence of elements including C, N, S, Cd, and Se in the prepared sample.…”

Section: Resultsmentioning

confidence: 99%

RETRACTED: CdSe Quantum Dot Nanoparticles: Synthesis and Application in the Development of Molecularly Imprinted Polymer-Based Dual Optical Sensors

Davoodi

Davar

Mandani

et al. 2021

Ind. Eng. Chem. Res.

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In this study, two types of CdSe, including nanoparticles and quantum dots, were synthesized. CdSe quantum dot nanoparticles were prepared via the hydrothermal technique at 140 °C for 8 h. The prepared CdSe materials were used as fluorimetric sensors aimed at the simultaneous analysis and detection of methamphetamine (Metha) as well as carbamazepine (Carba) drugs. Besides, the fluorimetric sensor was assembled depending on molecularly imprinted polymer (MIP) films with two sizes of cadmium selenide quantum dots as fluorophores source. The mechanistic synthesis of the fluorimetric sensor was based on covering the CdSe quantum dot nanoparticle surfaces with MIP film; afterward, a mixture of powdered yellow-CdSe@MIPs (y-CdSe@MIPs) and red-CdSe@MIPs (r-CdSe@MIPs) nanocomposites was applied for the simultaneous optical determination of Metha and Carba. Under optimal conditions, detection limits (DL) of 0.15 and 0.2 nM, as well as linear dynamic ranges (LDR) of 0.5 and 260 nM were acquired for Metha and Carba, respectively. Additionally, the application of the offered optical dual sensor was studied in human blood plasma as well as urine analytes.

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Section: Resultsmentioning

confidence: 99%

RETRACTED: CdSe Quantum Dot Nanoparticles: Synthesis and Application in the Development of Molecularly Imprinted Polymer-Based Dual Optical Sensors

Davoodi

Davar

Mandani

et al. 2021

Ind. Eng. Chem. Res.

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“… 11,34 In addition, the band at 427 cm −1 is allocated to the Co–N band in case of ZIF-67 and ZIF-67@MgAl 2 O 4 . 37,39,40 …”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of a new ZIF-67@MgAl₂O₄ nanocomposite and its adsorption behaviour

et al. 2021

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“…The results are consistent with those reported in the literature. 27 The above results showed that the MWCNTs@ZIF-67 composites had been successfully prepared.…”

Section: Characterizationmentioning

confidence: 68%

“…Multiwall carbon nanotubes (MWCNTs) and metal-organic frameworks have been a focus of many researchers for their large specific areas and excellent properties. 21,22 Metal-organic frameworks are threedimensional structures supported by organic ligands with metal ions as the ligand center, [23][24][25][26][27] of which ZIF-67 is a typical representative with large specific surface area and excellent thermochemical stability. 28 Solid-phase extraction (SPE) is a pretreatment technique that is used to extract and separate analytes from solution.…”

Section: Introductionmentioning

confidence: 99%

Bilobalide molecularly imprinted polymers prepared using MWCNTs/ZIF‐67 composite as supporter for solid‐phase extraction of bilobalide from real samples

Huang

Liu

Zhang

et al. 2021

Polymer International

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The preparation of raw materials is an important prerequisite for studying the function of natural active ingredients. Here, the preparation of MWCNTs/ZIF-67@MIPs based on surface molecular imprinting technology for the separation of bilobalide (BB) from real samples was proposed. The successful preparation of MWCNTs/ZIF-67@MIPs was demonstrated using several techniques. Adsorption equilibrium was achieved when the time was 4 h, and the rate of adsorption calculated from the dynamic adsorption results was 14.2 ∼g mL -1 h -1 . The maximum adsorption amount for MWCNTs/ZIF-67@MIPs of BB was calculated to be 59.2 mg g -1 , which was more than three times that for MWCNTs/ZIF-67@NIPs (23.1 mg g -1 ), and the Freundlich isotherm model and pseudo-second-order kinetic model were more suitable for the explanation of isothermal and kinetic adsorption behaviors, respectively. The results of selective adsorption indicated that MWCNTs/ZIF-67@MIPs show excellent selectivity and specificity for BB compared to structurally similar compounds such as ginkgolides A, B and C, with an excellent imprinting factor (2.83). The results of reuse studies indicated that MWCNTs/ZIF-67@MIPs exhibited great reproducibility with a recovery rate of 70.8% after repeated use for five times. Finally, the developed MWCNTs/ZIF-67@MIPs were used as a solidphase extraction sorbent to directly separate BB from treated gingko leaf extract and crude extract of BB, and the results suggested that the purity of BB in the two samples was increased by about 30%, and the recoveries reached 68.34% and 71.54%, respectively. Meanwhile, the separation effect of MWCNTs/ZIF-67@MIPs on BB was better than that of BBMIP prepared by bulk polymerization.

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Cobalt metal–organic framework-based ZIF-67 for the trace determination of herbicide molinate by ion mobility spectrometry: investigation of different morphologies

Abstract: Co-MOF-based zeolitic imidazolate frameworks (ZIF-67) with various morphologies were prepared via an innovative way under distinct reaction conditions.

Cited by 26 publications

References 46 publications

RETRACTED: CdSe Quantum Dot Nanoparticles: Synthesis and Application in the Development of Molecularly Imprinted Polymer-Based Dual Optical Sensors

RETRACTED: CdSe Quantum Dot Nanoparticles: Synthesis and Application in the Development of Molecularly Imprinted Polymer-Based Dual Optical Sensors

Synthesis and characterization of a new ZIF-67@MgAl₂O₄ nanocomposite and its adsorption behaviour

Bilobalide molecularly imprinted polymers prepared using MWCNTs/ZIF‐67 composite as supporter for solid‐phase extraction of bilobalide from real samples

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Cobalt metal–organic framework-based ZIF-67 for the trace determination of herbicide molinate by ion mobility spectrometry: investigation of different morphologies

Abstract: Co-MOF-based zeolitic imidazolate frameworks (ZIF-67) with various morphologies were prepared via an innovative way under distinct reaction conditions.

Cited by 26 publications

References 46 publications

RETRACTED: CdSe Quantum Dot Nanoparticles: Synthesis and Application in the Development of Molecularly Imprinted Polymer-Based Dual Optical Sensors

RETRACTED: CdSe Quantum Dot Nanoparticles: Synthesis and Application in the Development of Molecularly Imprinted Polymer-Based Dual Optical Sensors

Synthesis and characterization of a new ZIF-67@MgAl2O4 nanocomposite and its adsorption behaviour

Bilobalide molecularly imprinted polymers prepared using MWCNTs/ZIF‐67 composite as supporter for solid‐phase extraction of bilobalide from real samples

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Synthesis and characterization of a new ZIF-67@MgAl₂O₄ nanocomposite and its adsorption behaviour