Potentiometric detection of chemical species by spin-assisted assembly of vanadium pentoxide nanorods

Vieira, Nirton Cristi Silva; Avansi, Waldir; Figueiredo, Antônio Domingues de; Mastelaro, Valmor Roberto; Zucolotto, Valtencir

doi:10.1016/j.snb.2016.02.010

Cited by 8 publications

(7 citation statements)

References 27 publications

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“…Vanadium pentoxide (V 2 O 5 ) has been considered as a promising material for several applications due to its chemical and physical properties. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] In particular, V 2 O 5 nanostructures with a one-dimensional (1D) morphology have attracted considerable attention because of their different technological applications. [1][2][3]6,[8][9][10][11][12][13][14][15][16][17] It is well known that technological applications attributed to nanostructured materials are strongly related to their specific characteristics, such as the crystalline structure, crystallite size and morphology.…”

Section: Introductionmentioning

confidence: 99%

Study of the morphological evolution of vanadium pentoxide nanostructures under hydrothermal conditions

et al. 2016

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A detailed study on the morphological evolution of one-dimensional (1D) vanadium pentoxide (V 2 O 5 ) nanostructures was performed. Small-angle X-ray scattering (SAXS) and electron microcopy techniques were used for the analyses of the influence of synthesis parameters on a hydrothermal synthesis method of V 2 O 5 nanostructures based on the degradation of a peroxocomplex precursor. A mechanism that explains the morphological evolution under different experimental conditions is proposed and the role of the dehydration process as well as the importance of the oriented attachment (OA) mechanism is discussed.

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Section: Introductionmentioning

confidence: 99%

Study of the morphological evolution of vanadium pentoxide nanostructures under hydrothermal conditions

et al. 2016

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“…In addition, it is a relatively simple and inexpensive process, when compared to other methods with the same purpose [24]. Through a brief search using the keywords “V 2 O 5 urease biosensor” in Web of Science, we find only one article using V 2 O 5 nanorods with urease immobilized [20]. Thus, it can be highlighted that there is still more study to be done on this subject.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of V₂O₅/urease for a biosensor of urea

Rocha

Souza

Vieira

et al. 2020

Biotech and App Biochem

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Vanadium pentoxide (V2O5) was used as support material to immobilize the urease enzyme. V2O5 was prepared from a sol–gel process, and the immobilization of urease was done onto the surface of the PET/ITO/V2O5 film. Different concentrations of urea were tested to study the sensitivity of the biosensor. Tests with pH variation were carried out, and it was noticed that the total charge in the cyclic voltammograms decreases due to the increase in pH that influences the catalytic activity of the enzyme. From cyclic voltammograms, with a different scan rate, for linear correlation testing, it was observed that the anodic currents varied as a function of the scan rate. Based on the variation in the urea concentration, the current increased with the increase in the urea concentration, indicating the sensitivity of the material. The use of V2O5/urease showed favorable electrochemical responses for application in biosensors as well as being sensitive to the variation in the urea concentration and easy to obtain and prepare.

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“…6−12 In particular, one-dimensional (1D) V 2 O 5 structures (nanowires, nanofibers, nanotubes or nanorods) present enhanced physical and chemical properties, leading to an improvement in their sensing properties. 11,12 Despite having wide-ranging applications, the gas-sensing performance of TiO 2 nanostructures, another MOX, still needs to be better evaluated. TiO 2 in anatase phase has demonstrated interesting sensing properties related to gases such as acetone 13 and H 2 S. 14 A significant effort has been devoted to enhancing the gassensing performance of devices based on MOX.…”

Section: Introductionmentioning

confidence: 99%

“…Chemiresistors based on metal oxide semiconducting (MOX) nanostructures have drawn researchers’ attentions because of their several advantages related to gas sensor performance, such as stability, sensitivity, and reversibility. − Despite the fact that SnO 2 and ZnO compounds are the most extensively studied materials used as sensing layer, over the last decades other MOXs have also been studied because of their promising gas-sensing performance, especially their selectivity. , Vanadium pentoxide (V 2 O 5 ), for example, has excellent properties related to the detection of various (oxidizing and/or reducing) analytes. − In particular, one-dimensional (1D) V 2 O 5 structures (nanowires, nanofibers, nanotubes or nanorods) present enhanced physical and chemical properties, leading to an improvement in their sensing properties. , Despite having wide-ranging applications, the gas-sensing performance of TiO 2 nanostructures, another MOX, still needs to be better evaluated. TiO 2 in anatase phase has demonstrated interesting sensing properties related to gases such as acetone and H 2 S …”

Section: Introductionmentioning

confidence: 99%

One-Dimensional V₂O₅/TiO₂ Heterostructures for Chemiresistive Ozone Sensors

Avansi

Catto

Silva

et al. 2019

ACS Appl. Nano Mater.

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Over the last decades, there has been considerable interest in the synthesis of one-dimensional (1D) metal oxide nanostructures that can be used in gas sensor devices. Heterostructures, obtained by a combination of different semiconductor nanomaterials with different band energies, have been extensively studied in order to enhance their gas-sensing performance. In this context, our present study focuses on the investigation of chemiresistive-sensing capabilities of a combination of TiO 2 nanoparticles and V 2 O 5 nanowires obtained via hydrothermal treatment of the peroxometal complex. The formation of V 2 O 5 /TiO 2 heterostructures was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) measurements. This study also proposes an efficient approach to produce 1D V 2 O 5 /TiO 2 heterostructures with a good range of detection (0.09−1.25 ppm) and remarkable ozone-sensing properties related to repeatability and selectivity. KEYWORDS: O 3 sensor, V 2 O 5 /TiO 2 , heterostructures, hydrothermal method, chemiresistors

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Potentiometric detection of chemical species by spin-assisted assembly of vanadium pentoxide nanorods

Cited by 8 publications

References 27 publications

Study of the morphological evolution of vanadium pentoxide nanostructures under hydrothermal conditions

Study of the morphological evolution of vanadium pentoxide nanostructures under hydrothermal conditions

Synthesis and characterization of V₂O₅/urease for a biosensor of urea

One-Dimensional V₂O₅/TiO₂ Heterostructures for Chemiresistive Ozone Sensors

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Potentiometric detection of chemical species by spin-assisted assembly of vanadium pentoxide nanorods

Cited by 8 publications

References 27 publications

Study of the morphological evolution of vanadium pentoxide nanostructures under hydrothermal conditions

Study of the morphological evolution of vanadium pentoxide nanostructures under hydrothermal conditions

Synthesis and characterization of V2O5/urease for a biosensor of urea

One-Dimensional V2O5/TiO2 Heterostructures for Chemiresistive Ozone Sensors

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Product

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Synthesis and characterization of V₂O₅/urease for a biosensor of urea

One-Dimensional V₂O₅/TiO₂ Heterostructures for Chemiresistive Ozone Sensors