Synthesis of platinum-decorated iron vanadate nanorods with excellent sensing performance toward n-butylamine

Kaneti, Yusuf Valentino; Liu, Minsu; Zhang, Xiao; Bu, Yanru; Yuan, Yuan; Jiang, Xuchuan; Yu, Aibing

doi:10.1016/j.snb.2016.05.142

Cited by 20 publications

(9 citation statements)

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“…Thermal energy is required to activate the surface reaction between oxygen and SO 2 , and the optimum temperature is achieved when the adsorption rate is equal to the desorption rate. 82 Beyond the optimum temperature, the desorption rate is higher than the adsorption rate and causes a decrease in the response. In addition, the ZnO−MWCNT (5:1) composite shows a small response of 1.030 at room temperature.…”

Section: Resultsmentioning

confidence: 81%

“…In general, the responses of these sensors gradually increase with increasing temperature up to the optimum temperature, before decreasing as the temperature is increased beyond the optimum temperature. Thermal energy is required to activate the surface reaction between oxygen and SO 2 , and the optimum temperature is achieved when the adsorption rate is equal to the desorption rate . Beyond the optimum temperature, the desorption rate is higher than the adsorption rate and causes a decrease in the response.…”

Section: Resultsmentioning

confidence: 99%

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Hollow Zinc Oxide Microsphere–Multiwalled Carbon Nanotube Composites for Selective Detection of Sulfur Dioxide

Septiani

Saputro

Kaneti

et al. 2020

ACS Appl. Nano Mater.

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This work reports the first utilization of anthocyanin extracted from black rice (Oryza sativa L.) grains as a structure-directing agent for the synthesis of hollow zinc oxide (ZnO) spheres via a simple solvothermal reaction and their subsequent modifications with various amounts of multiwalled carbon nanotubes (MWCNTs). Following hybridization with MWCNTs, some MWCNTs are observed to penetrate into the inner cavities of the spheres, while ZnO nanoparticles are formed on the surface of some MWCNTs. When employed as a sulfur dioxide (SO 2 ) sensor, the ZnO−MWCNT (15:1) composite displays a high response of 156 to 70 ppm of SO 2 at an optimum temperature of 300 °C as well as good selectivity to SO 2 with the response to 50 ppm of SO 2 gas being 3 times higher than those to other gases, such as CO, CO 2 , methanol, toluene, hexane, and xylene. Interestingly, the sensing behavior of this composite is strongly influenced by the proportion of MWCNTs. Specifically, n-type sensing behavior is observed for both ZnO−MWCNT (10:1) and (15:1) composites, while p-type behavior is observed for the ZnO−MWCNT (5:1) composite. The switch in sensing behavior suggests the major contribution of p-type MWCNTs to the electronic and sensing properties of the ZnO/MWCNT composites. The density functional theory (DFT) simulations on the adsorption of SO 2 on the ZnO/CNT system reveal that the SO 2 molecule only chemically interacts with the O adatom of ZnO (i.e., oxygen atom adsorbed on the surface of ZnO) to form sulfur trioxide (SO 3 ), and charge transfer is observed from ZnO to CNT, which enhances the change in resistance of the composite sensor upon exposure to SO 2 gas.

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Section: Resultsmentioning

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Hollow Zinc Oxide Microsphere–Multiwalled Carbon Nanotube Composites for Selective Detection of Sulfur Dioxide

Septiani

Saputro

Kaneti

et al. 2020

ACS Appl. Nano Mater.

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“…Figure 5 displays the high‐resolution XPS spectra of FeVO 4 @Al 2 O 3 , together with FeVO 4 as the control sample. In Fe 2p spectra (Figure 5a), the peaks with binding energies (BEs) of 713.0 and 727.4 eV were attributed to the Fe 2p 1/2 and Fe 2p 3/2 of Fe 3+ ; the others with BEs of 711.2 and 725.6 eV were belonged to Fe 2p 1/2 and Fe 2p 3/2 of Fe 2+ , which were derived from the partial reduction of surface Fe 3+ [18] . In V 2p spectra (Figure 5b), the peaks with BEs of 517.0 and 523.2 eV were ascribed to the V 2p 3/2 and V 2p 1/2 of the V 5+ ; the others with BEs of 515.4 and 522.8 eV were attributed to the V 4+ [19] .…”

Section: Resultsmentioning

confidence: 99%

“…In Fe 2p spectra (Figure 5a), the peaks with binding energies (BEs) of 713.0 and 727.4 eV were attributed to the Fe 2p 1/2 and Fe 2p 3/2 of Fe 3 + ; the others with BEs of 711.2 and 725.6 eV were belonged to Fe 2p 1/2 and Fe 2p 3/2 of Fe 2 + , which were derived from the partial reduction of surface Fe 3 + . [18] In V 2p spectra (Figure 5b), the peaks with BEs of 517.0 and 523.2 eV were ascribed to the V 2p 3/2 and V 2p 1/2 of the V 5 + ; the others with BEs of 515.4 and 522.8 eV were attributed to the V 4 + . [19] In O 1s spectra (Figure 5c), the big one with BE of 530.0 eV was attributed to the oxygen atoms of FeVO 4 in O 2À state; [20] the small one with BE of 531.9 eV was mainly originated from the oxygen atoms of Al 2 O 3 .…”

Section: Chemistryselectmentioning

confidence: 96%

Improved Durability and Activity of FeVO₄ toward Photocatalytic Benzene Hydroxylation by Atomic Layer Deposited Al₂O₃

et al. 2022

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Selective hydroxylation of benzene to phenol over a visible light driven photocatalyst is a sustainable approach for the green synthesis of phenol. Iron vanadate (FeVO4) nanorods with an intrinsic photo‐Fenton catalytic behavior toward H2O2 activation is a promising candidate photocatalyst for the benzene hydroxylation reaction; however, its photocatalytic performance was greatly limited by the serious leaching of metals during the hydroxylation process. Herein, it has been demonstrated that this issue can be well addressed by the conformably coating of FeVO4 nanorods with an atomically‐precise thickness controlled dense Al2O3 layer (FeVO4@Al2O3) through the atomic layer deposition (ALD) technology. The Al2O3 nanolayer can well protect the FeVO4 nanorods from directly contacting with the reaction solution, thus effectively suppressing the leaching of metals during the photocatalytic hydroxylation process. In addition, the Al2O3 coating on FeVO4 also facilitates the kinetic control of heterogeneous benzene hydroxylation reaction over the catalyst surface, such as the benzene adsorption behavior and the photo‐Fenton activation of H2O2. As a result, FeVO4@Al2O3 exhibited an enhanced photocatalytic performance with a good durability in the long‐term production of phenol.

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“…In this process, the reaction of iron (III) nitrate and ammonium metavanadate solution at 75°C initially led to the precipitation of iron (III) monohydrated vanadate (FeVO 4 •H 2 O) and then calcination at 550°C produced iron vanadate without water. Generally, iron vanadate produced by the above methods has nanoparticles, nanobars, or nanocubes morphology [24][25][26]. To the best of the authors' knowledge, nanofibers of iron vanadate have not been prepared until now.…”

Section: Introductionmentioning

confidence: 99%

Preparation of ceramic nanofibers of iron vanadate using electrospinning method

Khaksarfard

Ziyadi

Heydari

2019

Materials Science-Poland

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Because of special characteristics of vanadate compound, such as its sustainability, magneticity, high selectivity in reactions and catalytic character, this study aimed to preparation and analyzing novel ceramic iron vanadate (FeVO4) nanofibers. The ceramic nanofibers of iron vanadate were made by the combination of sol-gel and electrospinning methods. First, polyvinyl alcohol (PVA), as a matrix polymer, was mixed separately with ammonium metavanadate (NH4VO3) and iron (III) nitrate (Fe(NO3)3). As a result, the spinnable polymeric gel was obtained from the controlled mixture of these two precursors of ceramic material. Electrospinning of PVA/iron (III) nitrate/ammonium vanadate solution was done using an Electroris setup that enabled preparation of polymeric template nanofiber. Finally, iron vanadate nanofiber was obtained by calcination of polymer nanofiber at controlled temperature. The products were characterized with scanning electron microscope (SEM), energy dispersive X-ray spectroscope (EDX), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), vibrating sample magnetometer (VSM) and Brunauer-Emmett-Teller (BET) surface area analysis.

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Synthesis of platinum-decorated iron vanadate nanorods with excellent sensing performance toward n-butylamine

Cited by 20 publications

References 59 publications

Hollow Zinc Oxide Microsphere–Multiwalled Carbon Nanotube Composites for Selective Detection of Sulfur Dioxide

Hollow Zinc Oxide Microsphere–Multiwalled Carbon Nanotube Composites for Selective Detection of Sulfur Dioxide

Improved Durability and Activity of FeVO₄ toward Photocatalytic Benzene Hydroxylation by Atomic Layer Deposited Al₂O₃

Preparation of ceramic nanofibers of iron vanadate using electrospinning method

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Synthesis of platinum-decorated iron vanadate nanorods with excellent sensing performance toward n-butylamine

Cited by 20 publications

References 59 publications

Hollow Zinc Oxide Microsphere–Multiwalled Carbon Nanotube Composites for Selective Detection of Sulfur Dioxide

Hollow Zinc Oxide Microsphere–Multiwalled Carbon Nanotube Composites for Selective Detection of Sulfur Dioxide

Improved Durability and Activity of FeVO4 toward Photocatalytic Benzene Hydroxylation by Atomic Layer Deposited Al2O3

Preparation of ceramic nanofibers of iron vanadate using electrospinning method

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Improved Durability and Activity of FeVO₄ toward Photocatalytic Benzene Hydroxylation by Atomic Layer Deposited Al₂O₃