Ruthenium-decorated vanadium pentoxide for room temperature ammonia sensing

Birajdar, Shobha N.; Hebalkar, Neha; Pardeshi, Satish K.; Kulkarni, Sulabha K.; Adhyapak, Parag V.

doi:10.1039/c9ra04382a

Cited by 23 publications

(9 citation statements)

References 54 publications

(64 reference statements)

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“…41 peaks corresponding to V 2 O 5 are reflected distinctively, and the presence of metallic ruthenium is marked as *, as displayed in Figure 6a. 54 Similarly, the FTIR spectra (Figure 6b) display the characteristic peaks of orthorhombic V 2 O 5 at 455, 595, 809, and 1005 cm −1 . The noticeable peaks at 455 and 595 cm −1 corresponded to the symmetric and asymmetric vibrations of a triple coordinated O 2 molecule.…”

Section: ■ Results and Discussionmentioning

confidence: 84%

“…Compared with the standards (JCPDS card no. 41-1426), all peaks corresponding to V 2 O 5 are reflected distinctively, and the presence of metallic ruthenium is marked as *, as displayed in Figure a . Similarly, the FTIR spectra (Figure b) display the characteristic peaks of orthorhombic V 2 O 5 at 455, 595, 809, and 1005 cm –1 .…”

Section: Results and Discussionmentioning

confidence: 85%

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Biphasic Separation Approach in the DES Biomass Fractionation Facilitates Lignin Recovery for Subsequent Valorization to Phenolics

Kumar

Sharma²,

Arumugam³

et al. 2020

ACS Sustainable Chem. Eng.

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Herein, we demonstrate a sustainable technique for quality facile lignin recovery by adopting a biphasic separation approach during the deep eutectic solvent (DES) disintegration of biomass for subsequent valorization. The tetrahydrofuran (THF)/ aq NaCl combination influenced the attainment of biphasic layer separation, consequently accelerating the movement of DESsolubilized lignin to the organic phase and allowing for the easy recovery of lignin and solvents (both THF and DES) for reuse. The modified protocol facilitated ∼32% wt lignin per wt of sawdust with a 95% purity (based on a Klason analysis), which was nearly 88% of the lignin extracted to the potential lignin of sawdust. This was achieved through the fractionation of sawdust using a choline chloride and lactic acid combination at a 1:2 molar ratio under modest thermal conditions. The obtained results were ∼2-fold higher than those of the conventional DES protocol, employing the H 2 O−EtOH mixture for lignin precipitation using a similar wood substrate. All of the analytical characterization techniques, including 13 C NMR, Fourier transform infrared, gel permeation chromatography, and pyrolysis-gas chromatographymass spectrometry (Py-GC/MS), established the relevant structural and morphological characteristics, making the resultant lignin an adequate feedstock for the potential production of aromatic chemicals because of the dominance of the β-O-4 content and the limited residual constituents, including sugars and silica. Upon evaluating its suitability for phenolic chemical synthesis via hydrogenolysis, a ∼48% butylated hydroxytoluene yield was obtained as a dominant phenolic product over heterogeneous Ru@ V 2 O 5 . Overall, the findings indicated that DES is proficient in fractionating lignocellulose for the entire release of lignin (>90%). The maximum recovery of the released lignin was attributed to the superlative performance of the novel THF/aq NaCl combination through the influence of molecular interactions, such as hydrogen bonding and dipole−dipole interactions between the lignin and solvent, thereby establishing an alternative trend for quality lignin extraction for deriving phenolics.

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Section: ■ Results and Discussionmentioning

confidence: 84%

Section: Results and Discussionmentioning

confidence: 85%

Biphasic Separation Approach in the DES Biomass Fractionation Facilitates Lignin Recovery for Subsequent Valorization to Phenolics

Kumar

Sharma²,

Arumugam³

et al. 2020

ACS Sustainable Chem. Eng.

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“…Ru, as a catalyst metal, has been intentionally introduced for certain gas sensing, which improves the sensing behaviors especially the selectivity as well as time factors. Birajdar et al [ 310 ] synthesized layer-structured V 2 O 5 microparticles through a hydrothermal strategy, followed by a facile wet chemical route to modify Ru NPs. Figure 21 a showed the morphology of a typical V 2 O 5 particle decorated by Ru NPs.…”

Section: Single Noble Metal-decorated Smos-based Gas Sensorsmentioning

confidence: 99%

Advances in Noble Metal-Decorated Metal Oxide Nanomaterials for Chemiresistive Gas Sensors: Overview

et al. 2023

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Highly sensitive gas sensors with remarkably low detection limits are attractive for diverse practical application fields including real-time environmental monitoring, exhaled breath diagnosis, and food freshness analysis. Among various chemiresistive sensing materials, noble metal-decorated semiconducting metal oxides (SMOs) have currently aroused extensive attention by virtue of the unique electronic and catalytic properties of noble metals. This review highlights the research progress on the designs and applications of different noble metal-decorated SMOs with diverse nanostructures (e.g., nanoparticles, nanowires, nanorods, nanosheets, nanoflowers, and microspheres) for high-performance gas sensors with higher response, faster response/recovery speed, lower operating temperature, and ultra-low detection limits. The key topics include Pt, Pd, Au, other noble metals (e.g., Ag, Ru, and Rh.), and bimetals-decorated SMOs containing ZnO, SnO2, WO3, other SMOs (e.g., In2O3, Fe2O3, and CuO), and heterostructured SMOs. In addition to conventional devices, the innovative applications like photo-assisted room temperature gas sensors and mechanically flexible smart wearable devices are also discussed. Moreover, the relevant mechanisms for the sensing performance improvement caused by noble metal decoration, including the electronic sensitization effect and the chemical sensitization effect, have also been summarized in detail. Finally, major challenges and future perspectives towards noble metal-decorated SMOs-based chemiresistive gas sensors are proposed.

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“…The appearance of (001) and (100) crystal planes at 2q values of 20°and 21°confirms the formation of α-V 2 O 5 crystals on V 2 O 5 and Pd/V 2 O 5 -C arrays alluding to the orthorhombic crystal system. [25,26] The diffraction peak located at a 2 q value of 26°alludes to the (002) carbon plane and the Pd/ V 2 O 5 -C array. Other five diffraction peaks located at 2q values of 40°, 47°, 68°, 82°, and 86°are characteristic features of the face center cubic (FCC) crystalline Pd and correspond to the (111), ( 200), ( 220), (311) and ( 222) miller planes respectively on the Pd/V 2 O 5 -C series.…”

Section: Physicochemical Characterizationmentioning

confidence: 99%

Unveiling the Collaborative Strategy and Synergistic Effects of Pd/V₂O₅‐fAC towards Glycerol Electrooxidation

Matthews,

Chabalala,

Mbokazi

et al. 2023

ChemCatChem

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A series of Pd nanoparticles supported on V2O5 immobilized on functionalized carbon, %Pd (1, 3, and 5) and %V2O5 (10, 20, and 30), were prepared by sodium borohydride‐assisted microwave polyol synthesis for glycerol oxidation reaction (GlyOR) in an alkaline medium. Electrocatalysts loading, temperature, V2O5 immobilization, and their synergistic effect on the electrocatalytic performance are systematically studied. The electrocatalysts' morphology and electronic properties were investigated using X‐ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, Transmission electron microscopy, and X‐ray photoelectron spectroscopy. A significantly improved GlyOR is observed with increased V2O5 content and Pd percentage. The 5%Pd/30%V2O5–fAC showed the highest mass activity of 2157.3 mA.mg‐1Pd, a more negative onset potential of 0.62 VRHE, versus the commercial equivalent, and possessed high stability and durability. The increase in electrocatalytic activity is attributed to the effective immobilization of V2O5 on fAC efficient synergism between Pd and V2O5, strong metal support interaction (SMSI), and great exposure of the electroactive sites. The results herein contribute significantly to the understanding of the physicochemical and electrochemical effects of metal oxide immobilization, microwave irradiation, %Pd/%Metal oxide optimization, and SMSI on metal oxide‐carbon hybrid electrocatalysts for GlyOR, opening new avenues for fabricating high‐performance direct alkaline glycerol fuel cells.

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Ruthenium-decorated vanadium pentoxide for room temperature ammonia sensing

Abstract: Layer structured vanadium pentoxide (V2O5) microparticles were synthesized hydrothermally and successfully decorated by a facile wet chemical route, with ∼10–20 nm sized ruthenium nanoparticles.

Cited by 23 publications

References 54 publications

Biphasic Separation Approach in the DES Biomass Fractionation Facilitates Lignin Recovery for Subsequent Valorization to Phenolics

Biphasic Separation Approach in the DES Biomass Fractionation Facilitates Lignin Recovery for Subsequent Valorization to Phenolics

Advances in Noble Metal-Decorated Metal Oxide Nanomaterials for Chemiresistive Gas Sensors: Overview

Unveiling the Collaborative Strategy and Synergistic Effects of Pd/V₂O₅‐fAC towards Glycerol Electrooxidation

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Ruthenium-decorated vanadium pentoxide for room temperature ammonia sensing

Abstract: Layer structured vanadium pentoxide (V2O5) microparticles were synthesized hydrothermally and successfully decorated by a facile wet chemical route, with ∼10–20 nm sized ruthenium nanoparticles.

Cited by 23 publications

References 54 publications

Biphasic Separation Approach in the DES Biomass Fractionation Facilitates Lignin Recovery for Subsequent Valorization to Phenolics

Biphasic Separation Approach in the DES Biomass Fractionation Facilitates Lignin Recovery for Subsequent Valorization to Phenolics

Advances in Noble Metal-Decorated Metal Oxide Nanomaterials for Chemiresistive Gas Sensors: Overview

Unveiling the Collaborative Strategy and Synergistic Effects of Pd/V2O5‐fAC towards Glycerol Electrooxidation

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Unveiling the Collaborative Strategy and Synergistic Effects of Pd/V₂O₅‐fAC towards Glycerol Electrooxidation