Structural and optical properties of Ag doped tungsten oxide (WO3) by microwave-assisted chemical route

Harshulkhan, S. Mohammed; Janaki, K.; Velraj, G.; Ganapathy, Rajesh; Krishnaraj, S.

doi:10.1007/s10854-015-4138-1

Cited by 20 publications

(5 citation statements)

References 19 publications

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“…Nanoparticles (NPs) and nanosheets have been extensively investigated for application as antibacterial agents and in drug delivery systems [1][2][3][4][5]. Antimicrobial nanomaterials have many advantages compared with conventional antibiotics for reducing drug side effects and treatment costs.…”

Section: Introductionmentioning

confidence: 99%

Immobilized WO₃nanoparticles on graphene oxide as a photo-induced antibacterial agent against UV-resistantBacillus pumilus

Hosseini

Rasuli

Jafarian

2018

J. Phys. D: Appl. Phys.

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We present the antibacterial and photo-catalytic activity of immobilized WO3 nanoparticles on graphene oxide sheets. WO3 nanoparticles were immobilized on graphene oxide using the arc discharge method in arc currents of 5, 20, 40 and 60 A. Tauc plots of the UV–visible spectra show that the band gap of the prepared samples decreases (to ~2.7 eV) with respect to the WO3 nanoparticles. Photo-catalytic activity was examined by the degradation of rhodamine B under ultra-violet irradiation and the results show that the photo-catalytic activity of WO3 nanoparticles is increased by immobilizing them on graphene oxide sheets. In addition, the photo-degradation yield of the samples prepared by the 5 A arc current is 84% in 120 min, which is more than that of the other samples. The antibacterial activity of the prepared samples was studied against Bacillus pumilus (B. pumilus) bacteria, showing high resistance to ultra-violet exposure. Our results show that the bare and immobilized WO3 nanoparticles become more active under UV irradiation and their antibacterial properties are comparable with Ag nanoparticles. Besides this, the results show that although the photo-catalytic activity of the post-annealed samples at 500 °C is less than the as-prepared samples, it is, however, more active against B. pumilus bacteria under UV irradiation.

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Section: Introductionmentioning

confidence: 99%

Immobilized WO₃nanoparticles on graphene oxide as a photo-induced antibacterial agent against UV-resistantBacillus pumilus

Hosseini

Rasuli

Jafarian

2018

J. Phys. D: Appl. Phys.

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“…These peaks are the result of dangling bonds in nanocrystals as well as tungsten interstitials and oxygen vacancies. The results indicate that the incorporation of Ag ions into the host lattice of WO 3 was successful, as evidenced by a slight decrease in the peak intensity and a shift toward higher energy with increasing Ag concentration …”

Section: Resultsmentioning

confidence: 90%

Ag-Doped WO₃ Nanoplates as Heterogenous Multifunctional Catalyst for Glycerol Acetylation, Electrocatalytic and Enhanced Photocatalytic Hydrogen Production

Naaz

Ahmad

2023

Langmuir

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Herein, we report a hydrothermal method to synthesize pristine and Agdoped WO 3 nanoplates and study their multifunctional competence in the accomplishment of enhanced catalytic organic conversion and highly efficient photocatalytic and electrocatalytic H 2 evolution reactions. The as-synthesized nanoplates were characterized by using various techniques including X-ray diffraction, field emission scanning electron microscopy-energy-dispersive X-ray analysis, transmission electron microscopy, UV−vis diffuse reflectance spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, and BET surface area studies. The significant catalytic performance was shown by 1% Agdoped WO 3 nanoplates with 100% glycerol conversion and 90% triacetin selectivity. The photocatalytic activity was also examined toward water splitting H 2 evolution reaction which demonstrates the highest H 2 evolution of 12.06 mmol g −1 catalyst for 1% Ag-doped WO 3 nanoplates in a time span of 8 h. Moreover, the electrocatalytic hydrogen evolution reaction was also monitored in acidic media (0.1 M H 2 SO 4 ) which demonstrates good results for 1% Ag-doped WO 3 nanoplates with a low overpotential of 0.53 V and a low Tafel slope of 40 mV dec −1 .

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“…This nding is also in agreement with results already presented in literature in which an energy band-gap decrease was observed for metal-load tungsten oxide. 55,56 To investigate photocatalytic activity of various 3D hierarchical architecture, we performed photocatalysis experiments. Rhodamine B, a typical dye, was used as the test pollutant.…”

Section: Resultsmentioning

confidence: 99%

One-step controllable synthesis of three-dimensional WO₃ hierarchical architectures with different morphologies decorated with silver nanoparticles: enhancing the photocatalytic activity

et al. 2020

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Structural and optical properties of Ag doped tungsten oxide (WO3) by microwave-assisted chemical route

Cited by 20 publications

References 19 publications

Immobilized WO₃nanoparticles on graphene oxide as a photo-induced antibacterial agent against UV-resistantBacillus pumilus

Immobilized WO₃nanoparticles on graphene oxide as a photo-induced antibacterial agent against UV-resistantBacillus pumilus

Ag-Doped WO₃ Nanoplates as Heterogenous Multifunctional Catalyst for Glycerol Acetylation, Electrocatalytic and Enhanced Photocatalytic Hydrogen Production

One-step controllable synthesis of three-dimensional WO₃ hierarchical architectures with different morphologies decorated with silver nanoparticles: enhancing the photocatalytic activity

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Structural and optical properties of Ag doped tungsten oxide (WO3) by microwave-assisted chemical route

Cited by 20 publications

References 19 publications

Immobilized WO3nanoparticles on graphene oxide as a photo-induced antibacterial agent against UV-resistantBacillus pumilus

Immobilized WO3nanoparticles on graphene oxide as a photo-induced antibacterial agent against UV-resistantBacillus pumilus

Ag-Doped WO3 Nanoplates as Heterogenous Multifunctional Catalyst for Glycerol Acetylation, Electrocatalytic and Enhanced Photocatalytic Hydrogen Production

One-step controllable synthesis of three-dimensional WO3 hierarchical architectures with different morphologies decorated with silver nanoparticles: enhancing the photocatalytic activity

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Product

Resources

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Immobilized WO₃nanoparticles on graphene oxide as a photo-induced antibacterial agent against UV-resistantBacillus pumilus

Immobilized WO₃nanoparticles on graphene oxide as a photo-induced antibacterial agent against UV-resistantBacillus pumilus

Ag-Doped WO₃ Nanoplates as Heterogenous Multifunctional Catalyst for Glycerol Acetylation, Electrocatalytic and Enhanced Photocatalytic Hydrogen Production

One-step controllable synthesis of three-dimensional WO₃ hierarchical architectures with different morphologies decorated with silver nanoparticles: enhancing the photocatalytic activity