Photocatalytic Activity and Humidity Sensor Studies of Magnetically Reusable FeWO<sub>4</sub>–WO<sub>3</sub> Composite Nanoparticles

Poovaragan, S; Sundaram, R.; Magdalane, C. Maria; Kaviyarasu, K.; Mâaza, M.

doi:10.1166/jnn.2019.15565

Cited by 46 publications

(6 citation statements)

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“…This table can be seen as a sign that B doped ZnO nanostructured thin films have humidity sensor potential and that these nanostructures can be considered for applications in this field. However, Poovaragan et al and Babu Reddy et al obtained very high sensitivity values in their studies [105,106]. Even though these values are higher than the values obtained in this study, our study can be considered more noteworthy because we can produce our sensors easily and at low cost.…”

Section: Humidity Sensing Measurementscontrasting

confidence: 49%

Improved humidity sensing performances of boron doped ZnO nanostructured thin films depending on boron concentration

Algün,

Alshater,

Akçay

2024

Phys. Scr.

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This study details the production and analysis of undoped zinc oxide (uZnO) and boron (B) doped zinc oxide nanostructured thin films, with a specific focus on assessing the influence of varying B doping concentrations on humidity sensing performance. The synthesis of undoped ZnO and B doped ZnO nanoparticles was carried out using sol-gel method. B doping concentrations within the ZnO lattice were adjusted to 1, 3, 4, 5, and 10 mol%. Subsequently, nanostructured thin films were obtained through the spin coating technique on glass substrates. X-ray diffraction analysis revealed a hexagonal wurtzite structure for all nanostructured thin films. Notably, a change in preferential orientation from the (002) plane to the (100) plane occurred when B doping concentration exceeded 5 mol%. Scanning electron microscopy showcased nano-sized grains and capillary nanopores on the surface of each thin film. Energy dispersive X-ray spectra confirmed the presence of zinc, oxygen, and boron elements in the nanostructured thin films. Humidity sensing performance was assessed through electrical resistance measurements in the range of 45–90% relative humidity at room temperature. All fabricated sensors exhibited sensitivity to humidity. Remarkably, the sensor with a 5 mol% B doping concentration demonstrated the highest humidity sensitivity (438.44 times) and the fastest response (2.0 s) and recovery times (14.2 s). The study concluded that the optimal B doping concentration for designing a highly efficient humidity sensor was determined to be 5 mol%. Overall, the study underscores the potential of B doped ZnO nanostructures for humidity sensor applications, given their exceptional sensor performance.

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Section: Humidity Sensing Measurementscontrasting

confidence: 49%

Improved humidity sensing performances of boron doped ZnO nanostructured thin films depending on boron concentration

Algün,

Alshater,

Akçay

2024

Phys. Scr.

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“…The significant ferromagnetic behaviour of virgin WO 3 nanostructures is related to the presence of surface defects, especially oxygen voids, which are dependent on particle size and annealing temperature. The appearance of metal oxides can lead to the occurrence of more defects on the surface [95]. These oxygen gaps may cause defects throughout the hybridisation at the Fermi surface and create a long-term superparamagnetic arrangement [96].…”

Section: Vsmmentioning

confidence: 99%

Green synthesis of tungsten oxide (WO ₃ ) nanosheets and investigation of their photocatalytic and cytotoxicity effects

Ghazal

Mirzaee

Darroudi

2022

Micro & Nano Letters

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In the present work, the synthesis of tungsten oxide nanosheets (WO 3 -NS) was performed through a sol-gel method with the usage of Na 2 WO 4 as the tungsten source in a gelatin solution that functioned as a novel green stabilising agent. The synthesised WO 3 -NS were characterised by the analysing methods of XRD, FESEM/EDX, FTIR, TGA/DTG, UVvis, Raman, and VSM. The photocatalytic activity of the product is investigated through the exertion of methylene blue pigment, while the obtained results reported 95% of degradation in 187 min under the light of a mercury vapour lamp. The cytotoxicity effect of WO 3 -NS on the human liver (Huh-7) cell line was evaluated by the means of the MTT method, which displayed the inhibiting capabilities of these nanosheets regarding cancer cells.

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“…Recently, n-n, p-n heterostructure composites, and graphene/MOSs composites have attracted significant attention as functioned materials due to the higher sensitivity and faster response. [30,[61][62][63][64][65][66][67] Wang et al fabricated 3D opal porous SnO 2 -ZnO hollow microspheres by employing sulfonated polystyrene spheres template-assisted ultrasonic spray pyrolysis (Fig. 5).…”

Section: Designing Composite Structuresmentioning

confidence: 99%

Acetone sensors for non-invasive diagnosis of diabetes based on metal–oxide–semiconductor materials

Li¹,

Zhang²,

Zhang³

2020

Chinese Phys. B

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In recent years, clinical studies have found that acetone concentration in exhaled breath can be taken as a characteristic marker of diabetes. Metal–oxide–semiconductor (MOS) materials are widely used in acetone gas sensors due to their low cost, high sensitivity, fast response/recovery time, and easy integration. This paper reviews recent progress in acetone sensors based on MOS materials for diabetes diagnosis. The methods of improving the performance of acetone sensor have been explored for comparison, especially in high humidity conditions. We summarize the current excellent methods of preparations of sensors based on MOSs and hope to provide some help for the progress of acetone sensors in the diagnosis of diabetes.

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Photocatalytic Activity and Humidity Sensor Studies of Magnetically Reusable FeWO₄–WO₃ Composite Nanoparticles

Cited by 46 publications

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Improved humidity sensing performances of boron doped ZnO nanostructured thin films depending on boron concentration

Improved humidity sensing performances of boron doped ZnO nanostructured thin films depending on boron concentration

Green synthesis of tungsten oxide (WO ₃ ) nanosheets and investigation of their photocatalytic and cytotoxicity effects

Acetone sensors for non-invasive diagnosis of diabetes based on metal–oxide–semiconductor materials

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Photocatalytic Activity and Humidity Sensor Studies of Magnetically Reusable FeWO4–WO3 Composite Nanoparticles

Cited by 46 publications

References 0 publications

Improved humidity sensing performances of boron doped ZnO nanostructured thin films depending on boron concentration

Improved humidity sensing performances of boron doped ZnO nanostructured thin films depending on boron concentration

Green synthesis of tungsten oxide (WO 3 ) nanosheets and investigation of their photocatalytic and cytotoxicity effects

Acetone sensors for non-invasive diagnosis of diabetes based on metal–oxide–semiconductor materials

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Photocatalytic Activity and Humidity Sensor Studies of Magnetically Reusable FeWO₄–WO₃ Composite Nanoparticles

Green synthesis of tungsten oxide (WO ₃ ) nanosheets and investigation of their photocatalytic and cytotoxicity effects