Porous ZnO Nanostructures Synthesized by Microwave Hydrothermal Method for Energy Harvesting Applications

Ferreira, Sofia Henriques; Rovisco, Ana; Santos, Andréia dos; Águas, Hugo; Igreja, Rui; Barquinha, Pedro; Fortunato, Elvira; Martins, Rodrigo

doi:10.5772/intechopen.97060

Cited by 4 publications

(1 citation statement)

References 87 publications

(109 reference statements)

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“…There are several reports of the use of ZnO in sensing applications, including gas sensors, , ultraviolet (UV) sensors, ,, and pressure sensors . Moreover, ZnO is used in applications related to its photocatalytic activity. , In the area of nanomaterials-based glucose sensors, there are several reports of the use of ZnO nanomaterials and hybrid nanostructures containing this metal oxide in enzymatic glucose sensors − and nonenzymatic sensors, whether amperometric − or optical. ,, …”

Section: Introductionmentioning

confidence: 99%

Visible Photoluminescent Zinc Oxide Nanorods for Label-Free Nonenzymatic Glucose Detection

Morais

Marques

Ferreira

et al. 2022

ACS Appl. Nano Mater.

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Diabetes mellitus affects a significant percentage of the world’s population, and the incidence of this disease is expected to increase exponentially in the coming years. The development of practical and low-cost glucose sensors is of utmost importance to monitor and manage diabetes and diabetes associated complications. In this scope, a nonenzymatic glucose sensor was produced by growing zinc oxide (ZnO) nanorods on a cellulose-based substrate by microwave-assisted hydrothermal synthesis. The developed sensor relies on ZnO nanorods’ photocatalytic ability to photo-oxidize glucose, eliminating the need to use an oxidase enzyme. The quantification of glucose is based on the quenching of the ZnO’s photoluminescence signal by the hydrogen peroxide produced during the nonenzymatic oxidation of this monosaccharide. The developed sensor possesses a sensitivity of 1.46%/mM, a linear range between 0.5 and 30 mM, and a limit of detection of 0.103 mM. The sensor showed good selectivity for glucose, and it was also demonstrated that there was a high correlation between the glucose concentration values obtained using the sensor’s calibration curve and the clinical data of human plasma samples, therefore validating the use of ZnO nanorods to monitor the glucose concentration in human plasma samples. This work reports for the first time a ZnO-based eco-friendly, stable, and highly selective alternative for glucose monitoring, pointing to a promising future for metal oxide nanostructures for biomedical sensors.

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Section: Introductionmentioning

confidence: 99%

Visible Photoluminescent Zinc Oxide Nanorods for Label-Free Nonenzymatic Glucose Detection

Morais

Marques

Ferreira

et al. 2022

ACS Appl. Nano Mater.

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MoS2 decorated carbon fiber yarn hybrids for the development of freestanding flexible supercapacitors

Carvalho,

Correia,

Cordeiro

et al. 2024

npj 2D Mater Appl

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Academic and industrial efforts have focused on developing energy storage devices for wearable and portable electronics using low-cost, scalable, and sustainable materials and approaches. In this work, commercially available stretch-broken carbon fiber yarns (SBCFYs) were hybridized with mixed phases of 1 T and 2H MoS2 nanosheets via conventional and microwave-assisted heating (CAH, MAH) without the use of binders to fabricate symmetric freestanding 1D fiber-shaped supercapacitors (FSCs). Electrochemical characterization performed in a three-electrode configuration showed promising results with specific capacitance values of 184.41 and 180.02 F·g−1, at 1 mV·s−1 for CAH and MAH, respectively. Furthermore, after performing 3000 CV cycles at 100 mV·s−1, the capacitance retention was 79.5% and 95.7%, respectively. Using these results as a reference, symmetric 1D FSCs were fabricated by pairing hybridized SBCFYs with MoS2 by MAH. The devices exhibited specific capacitances of approximately 58.60 ± 3.06 F·g−1 at 1 mV·s−1 and 54.81 ± 7.34 F·g−1 at 0.2 A·g−1 with the highest power density achieved being 15.17 W·g−1 and energy density of 5.06×10–4 Wh·g−1. In addition, five 1D FSCs were hand-stitched and connected in series onto a cotton fabric. These supercapacitors could power a temperature and humidity sensor for up to six minutes, demonstrating the practicality and versatility of the prepared 1D FSCs for powering future electronic systems.

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Electromagnetic Heating for the Separation of Water-Oil Emulsion

Mowea,

Ibrahim,

Oudah

2024

Pet. Chem.

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Porous ZnO Nanostructures Synthesized by Microwave Hydrothermal Method for Energy Harvesting Applications

Cited by 4 publications

References 87 publications

Visible Photoluminescent Zinc Oxide Nanorods for Label-Free Nonenzymatic Glucose Detection

Visible Photoluminescent Zinc Oxide Nanorods for Label-Free Nonenzymatic Glucose Detection

MoS2 decorated carbon fiber yarn hybrids for the development of freestanding flexible supercapacitors

Electromagnetic Heating for the Separation of Water-Oil Emulsion

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