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Your search keyword '"Van Ngo, Truc"' showing total 2 results
Start Over Author "Van Ngo, Truc" Topic graphene
2 results on '"Van Ngo, Truc"'

1. Graphene and metal organic frameworks (MOFs) hybridization for tunable chemoresistive sensors for detection of volatile organic compounds (VOCs) biomarkers.

Author

Tung, Tran Thanh, Tran, Manh Trung, Feller, Jean-François, Castro, Mickael, Van Ngo, Truc, Hassan, Kamrul, Nine, Md J., and Losic, Dusan

Subjects
*ORGANOMETALLIC compounds, *VOLATILE organic compounds, *ACETONE, *GRAPHENE, *NANOCOMPOSITE materials, *DETECTORS, *CHLOROFORM
Abstract

The paper presents the tuning of sensitivity and selectivity performance of volatile organic compounds (VOCs) chemoresistive sensors for biomarker detection using the hybridization of pristine graphene (pG) and metal organic frameworks (MOFs). The synergistic effect of this nanocomposite material was discovered showing improved sensing performances where graphene acts as a highly conductive sensing element, and MOFs, with a high surface area and adsorption capacity provide an enhanced sensitivity and selectivity for specific VOCs. By combining and selecting different MOFs, we proposed that is possible to tailor sensing performances of chemoresistive sensors for VOC biomarkers detection. To prove that graphene hybrid nanocomposite with selected MOFs including copper–benzene-1,3,5-tricarboxylate (pG-Cu BTC), zirconium 1,4-dicarboxybenzene (pG-UiO 66) and 2-methylimidazole zinc salt (pG-ZIF 8), were investigated to enhance the sensing performance and capability of distinguishing different VOC biomarkers (e.g., methanol, ethanol, chloroform, acetone, acetonitrile and THF). Results showed that the pG-Cu BTC sensor has the highest sensitivity and selectivity towards chloroform and methanol VOCs at 2.82–22.6 ppm level. The proposed concept presents a valuable contribution for the development of low-cost and high-performing VOC biomarker sensors for monitoring human health from metabolic human breath and further implementation for non-invasive biomedical diagnostics for personalized telehealth monitoring. Image 10660 [ABSTRACT FROM AUTHOR]

Published
2020
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2. Hybridization of MOFs and graphene: A new strategy for the synthesis of porous 3D carbon composites for high performing supercapacitors

Author

Tran Thanh Tung, Campbell J. Coghlan, Mahmoud Moussa, Dusan Losic, Truc Van Ngo, Van Ngo, Truc, Moussa, Mahmoud, Tung, Tran Thanh, Coghlan, Campbell, and Losic, Dusan

Subjects
Materials science, laser scribing, General Chemical Engineering, Composite number, Oxide, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Capacitance, law.invention, chemistry.chemical_compound, law, Electrochemistry, supercapacitor, Porosity, Supercapacitor, Graphene, 021001 nanoscience & nanotechnology, 3D porous graphene, MOFs, 0104 chemical sciences, Chemical engineering, chemistry, Electrode, graphene composites, 0210 nano-technology, Carbon
Abstract

A novel porous 3D-structured carbon composite material with a unique architecture by combining graphene and carbonized metal-organic framework (C-MOF) (HKUST-1) microrods for high performing supercapacitors has been synthesised and characterised. The HKUST-1 microrods were prepared by a new method, converting their diamond-like shape into microrods via mechanical shear mixing in an aqueous solution. Grinding of HKUST-1 and graphene oxide (GO) resulted in the formation of a 3D GO-MOF composite with intercalated HKUST-1 microrods between GO sheets. The composite film was treated by a laser scribing method and created a highly porous, a high surface area (>600 m²/g) and conductive 3D nanostructured composite film (L-rGO-C-MOF) used as electrodes for supercapacitor applications. The prepared film showed a high capacitance of 390 F/g at 5 mV/s, and a cyclic stability of 97.8% at 10 A/g after 5000 cycles. The symmetrical supercapacitor delivered an excellent power density of 8037.5 W/kg with an outstanding energy density of 22.3 Wh/kg confirming a new pathway to design new 3D porous graphene-MOF composites for high-performance energy storage devices. Refereed/Peer-reviewed

Published
2020
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