Synthesis, characterization, and comparative gas-sensing properties of Fe2O3 prepared from Fe3O4 and Fe3O4-chitosan

Cuong, Nguyen Duc; Hòa, Trần Thái; Khiếu, Đinh Quang; Лам, Тран Дай; Hòa, Nguyễn Đức; Hieu, Nguyen Van

doi:10.1016/j.jallcom.2012.01.117

Cited by 79 publications

(22 citation statements)

References 32 publications

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“… However, the diffraction peaks of Fe 3 O 4 and Fe 3 O 4 ‐AA were strong, while those of MIPs were relatively weak, which was due to the presence of polymer shells on the surface of the Fe 3 O 4 nanoparticles. Similar results of a decrease in the diffraction strength upon coating Fe 3 O 4 with a shell have been reported …”

Section: Resultsmentioning

confidence: 99%

Fabrication and evaluation of controllable core/shell magnetic molecular imprinted polymers based on konjac glucomannan for trichlorfon

Kang

Tian

2019

J of Applied Polymer Sci

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By combining the controllable core/shell strategy with graft copolymerization of polysaccharides, controllable core/shell magnetic molecularly imprinted polymers (MIPs) based on konjac glucomannan for selective recognition and enrichment of trichlorfon were fabricated and evaluated. By varying the dose of the polymeric precursors, the shell thickness of the core/shell structure could be regulated over a wide range. The magnetic nanoparticles encapsulated by polymers still had high magnetic performance and could be easily separated by an external magnetic field. The results of adsorption experiments showed that the MIPs could specifically recognize and adsorb trichlorfon with excellent selectivity, repeatability, and stability. The adsorption isotherm of MIPs could be fitted by the Langmuir equation. In addition, magnetic MIPs have been successfully applied to the detection of trichlorfon in real samples. Eco-friendly MIPs would be particularly suitable for the enrichment and separation of pesticide residues in food samples.

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Section: Resultsmentioning

confidence: 99%

Fabrication and evaluation of controllable core/shell magnetic molecular imprinted polymers based on konjac glucomannan for trichlorfon

Kang

Tian

2019

J of Applied Polymer Sci

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“…[19] Cs has also been used to coat Fe 3 O 4 nanoparticles to prepare iron oxide-based gas sensors. [20] The gas sensing measurements revealed that the Fe 3 O 4 /Cs nanocomposite had a better response to H 2 , CO, C 2 H 5 OH, and NH 3 as compared to the pristine Fe 3 O 4 . [20] The same nanocomposite film deposited onto indium-tin-oxide has been prepared for urea detection and the sensor has shown good sensitivity.…”

Section: Introductionmentioning

confidence: 91%

“…[20] The gas sensing measurements revealed that the Fe 3 O 4 /Cs nanocomposite had a better response to H 2 , CO, C 2 H 5 OH, and NH 3 as compared to the pristine Fe 3 O 4 . [20] The same nanocomposite film deposited onto indium-tin-oxide has been prepared for urea detection and the sensor has shown good sensitivity. [21] The dispersion of carbon nanoparticles into Cs matrix has been successfully used to develop water, toluene, and methyl alcohol vapors sensor.…”

Section: Introductionmentioning

confidence: 91%

Detection of some volatile organic compounds with chitosan-coated quartz crystal microbalance

Ayad

Salahuddin

Minisy

2014

Designed Monomers and Polymers

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A quartz crystal microbalance (QCM) electrode coated with Chitosan (Cs) film was used as a sensor for some volatile organic compounds (VOCs) such as aliphatic amines and alcohols. A homogeneous smooth thin films of Cs coating on the QCM electrode was prepared by drop casting method. The frequency shifts (Δf) of the QCM, due to adsorption of the VOCs under investigation, onto the Cs film were measured and were related to the analytes' concentrations. Calibration curves were obtained with linear relationships between the Δf (Hz) and the analyte concentrations (mg L −1 ). The sensor showed good sensitivity, reproducibility, and reversibility. The influence of different temperatures on the vapor adsorption, of the VOCs onto the Cs film, was studied.

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“…Magnetite was used in this study due to its superparamagnetic properties as well as ease of synthesis via co-precipitation. The surface of these nanoparticles have previously been coated with a polymer for use in biomedical applications [13].…”

Section: Introductionmentioning

confidence: 99%

Polymer-coated magnetic nanoparticles for the efficient capture of Mycobacterium tuberculosis (Mtb)

Smit

Lutz

2020

SN Appl. Sci.

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Modified chitosan and modified poly(styrene-alt-maleic anhydride) (SMA) were synthesized and utilized to coat superparamagnetic magnetite nanoparticles (SPMNs) to act as potential Mycobacterium tuberculosis (Mtb) capturing substrates. Chitosan and SMA were modified to form quaternary derivatives which have the potential to interact with the Mtb cell wall. The nano-substrates were also surface functionalized with a carbohydrate-binding protein, namely Concanavalin A (Con A), which can bind to the Mtb cell wall. Chitosan coated SPMNs were synthesized by in situ co-precipitating Fe 2+ and Fe 3+ with chitosan followed by further modification. SMA coated SPMNs were synthesized by activating the iron oxide core with 3-aminopropyl(triethoxysilane) followed by further modification. The nano-substrates were evaluated for their affinity and thus capturing capabilities utilizing the mCherry fluorophore tagged bacillus Calmette-Guérin (BCG) strain of Mycobacterium bovis, a live attenuated Mtb-mimic. Quaternary SMA (SMI-qC 12 ) revealed the highest overall affinity for BCG-mCherry (through electrostatic and hydrophobic interactions) whereas Con A immobilized chitosan had the highest affinity for the chitosan coated nanoparticles. The SPMNs were coated with three different polymer loadings and a dilution study was performed to determine the limit of detection. The 0.9 g loaded SMI-qC 12 SPMNs revealed the highest affinity for BCG-mCherry as determined via fluorescence microscopy and transmission electron microscopy.

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Synthesis, characterization, and comparative gas-sensing properties of Fe2O3 prepared from Fe3O4 and Fe3O4-chitosan

Cited by 79 publications

References 32 publications

Fabrication and evaluation of controllable core/shell magnetic molecular imprinted polymers based on konjac glucomannan for trichlorfon

Fabrication and evaluation of controllable core/shell magnetic molecular imprinted polymers based on konjac glucomannan for trichlorfon

Detection of some volatile organic compounds with chitosan-coated quartz crystal microbalance

Polymer-coated magnetic nanoparticles for the efficient capture of Mycobacterium tuberculosis (Mtb)

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