Elucidation of photocatalysis, photoluminescence and antibacterial studies of Ag2MoO4 decorated NiMoO4 nano-heterostructure

Balasurya, S.; Syed, Asad; Raju, Lija L.; Al-Rashed, Sarah; Thomas, Ajith M.; Das, Arunava; Khan, S. Sudheer

doi:10.1016/j.optmat.2021.110856

Cited by 48 publications

(21 citation statements)

References 51 publications

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“…UV−Vis by DRS. The optical properties through the UV−vis spectra by DRS are illustrated in Figure 2a−d. On the basis of the literature, 21,30 a high photon absorption is expected by silver molybdate in the UV region, agreeing with the DSR spectrum, as shown in Figure 2a. However, the illustrated spectrum for β-Ag 1.94 Cu 0.06 MoO 4 shows strong absorption with a maximum reflectance near 600 nm, attributed to the d− d transitions of the Cu 3d orbitals.…”

Section: Results Andsupporting

confidence: 86%

“…Deconvolution of the PL spectrum of each sample as mentioned above and their emission center values and percentages are related to the different defect energy levels present in the samples. 20 x clusters. 21 The PL emission in the blue region (E photon = 2.7 eV) is related to the indirect electronic transitions from CB to CB, 18 while the PL emission in the red region is related to the deep defects in the forbidden zone.…”

Section: Results Andmentioning

confidence: 99%

“…2,8,14 Therefore, stick, 15 flower, 16 and potato 17 morphologies have been synthesized for these materials. β-Ag 2 MoO 4 has aroused great interest because of its good chemical stability at high temperatures, in addition to presenting a range of applications in different fields including energy storage, 18 antimicrobial agents, 1,2 photocatalysis, 19,20 and PL. 21,22 However, β-Ag 2 MoO 4 has an effective photon absorption in the ultraviolet region, which is limited to several photonics applications.…”

Section: Introductionmentioning

confidence: 99%

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Rietveld Refinement, Morphology, and Optical and Photoluminescence Properties of a β-Ag_1.94Cu_0.06MoO₄ Solid Solution

et al. 2022

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Corner-truncated cubic β-Ag 1.94 Cu 0.06 MoO 4 microcrystals were synthesized using the hydrothermal method. These were investigated by X-ray diffraction, confirming obtention of the spinel structure Fd3̅ m. Through Raman spectroscopy are confirmed all modes for the point group of O h 7. The E gap shows a decrease of the band gap from 3.20 to 3.07 eV, with reduction of the conduction band occurring from −0.20 eV (β-Ag 2 MoO 4 ) to −0.13 eV (β-Ag 1.94 Cu 0.06 MoO 4 ), suggesting a p-type behavior for the Cu 2+ ion. The fieldemission scanning electron microscopy images confirm the morphological changes for β-Ag 2 MoO 4 , where potato-like microcrystals were found. Meanwhile, corner-truncated cubic microcrystals for β-Ag 1.94 Cu 0.06 MoO 4 . The photoluminescence (PL) spectrum confirms the increase in the PL emission for β-Ag 1.94 Cu 0.06 MoO 4 , with suppression of the deep defects occurring in the structure caused by oxygen and silver atoms. In contrast, the green region is intensified because of distortions of the Ag−O and Mo−O bonds. Therefore, the β-Ag 1.94 Cu 0.06 MoO 4 solid solution has PL emission with CCT (4510 K) and CIE coordinates (x = 0.372 and y = 0.433), which could be interesting properties for applications as light-emitting diodes.

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Section: Results Andsupporting

confidence: 86%

Section: Results Andmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rietveld Refinement, Morphology, and Optical and Photoluminescence Properties of a β-Ag_1.94Cu_0.06MoO₄ Solid Solution

et al. 2022

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“…The NMO NPs were synthesized via the facile sol-gel technique, as illustrated in [41]. The as-synthesized NMO NPs were dried at 300 °C [36][37][38][39][40]42]. Then 2 g of NMO NPs was pressed into the shape of a disk.…”

Section: Preparation Of Nmo Npsmentioning

confidence: 99%

Tuning the structure, optical, and magnetic properties of nanostructured NiMoO4 by nitrogen plasma treatment

et al. 2022

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Herein, the nitrogen plasma treatment with different time irradiation (0, 90, 120, and 150 min) is used to tune the structure, optical, and magnetic properties of nanostructured NiMoO4 NMO NPs. The XRD patterns revealed that the crystallinity of NMO samples increases with an increase in the N2 plasma exposure time. The notable reduce in this peak’ intensity for the sample at dose of 120 min may be attributed to the energy dissipated in the defect generation. Also, the crystallite size for NMO samples was found in the range (23.9–26.7) nm. Further, EPR is used to evaluate the impact of the treatment duration on the oxygen vacancy density. The total number of spins rises as plasma irradiation duration increases, revealing that the NMO NPs can be used as a dosimeter for plasma irradiation. The optical bandgap ranged from 2.92 eV to 3.24 eV as the N2 plasma treatment duration changed. The saturation magnetization was enhanced with the rise of plasma treatment time. Furthermore, the Hc increases from 16.67 G for untreated NMO NPs to 128.41 G for N2 plasma-treated NMO NPs for 150 min. The resulted optical and magnetic properties of N2 plasma-treated NMO NPs make it candidate material for photocatalysis applications.

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“…The very first step involved in the mechanism of photocatalytic degradation of dyes is the adsorption of dye molecules on the surface of NPs of catalyst. When samples are irradiated with solar radiations, the electrons (e − ) in the valence band (VB) of LiCo 0.5 (Fe 2 O 4 ) and Bi-doped LiCo 0.5 (Fe 2 O 4 ) are excited to the conduction band (CB) [52]. This will ultimately create a gap with positive charge in the VB [53].…”

Section: Mechanism Of Photocatalysismentioning

confidence: 99%

Synthesis, characterization and environmental remediation studies of Bi-substituted Li-Co spinel ferrites

Haider

Agboola

Al-Khalli

et al. 2021

Journal of Taibah University for Science

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Photocatalytic ability of Lithium-Cobalt ferrites was improved by doping with Bi. For the synthesis of different compositions of Bi-doped Li-Co Ferrites, the Micro-Emulsion method was used. X-ray diffraction (XRD) and Fourier transform infrared (FTIR) and Scanning Electron Microscopy (SEM) analyses confirmed its spinel structure and morphology. Bi-substituted Li-Co ferrites exhibit 93.8% and 83.9% degradation of methylene blue and crystal violet, respectively. While using scavenger this value of degradation of crystal violet exceeds up to 98.5%. The rate constants of LiCo 0.5 Bi 0.4 Fe 1.6 O 4 for methylene blue (MB) and crystal violet (CV) are 0.0203 and 0.01615 min −1 , respectively. The band gap energy value calculated using tauc plot is 2.70 eV and 3.95Ev for Li-Co ferrites and Bi-doped Li-Co ferrites, respectively. Electrochemical impedance spectroscopy (EIS) studies confirmed that the doping of Bi in Li-Co spinel ferrites enhances its conductance. The use of these ferrites for photocatalytic degradation is more beneficial because they can be easily separable afterwards due to their magnetic nature which is confirmed by studying the re-usability of the as-synthesized samples. Highlights• Li-Co ferrites and Bi-substituted Li-Co ferrites were synthesized by the micro-emulsion method. • XRD and FTIR confirmed their spinel structural features.• The prepared catalyst successfully degraded the MB ( > 90%) and CV ( > 80%).• Antibacterial studies of as-synthesized samples were also done for S. aureus (Positive Strain) and P. aeruginosa (Negative Strain) microorganisms.

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Elucidation of photocatalysis, photoluminescence and antibacterial studies of Ag2MoO4 decorated NiMoO4 nano-heterostructure

Cited by 48 publications

References 51 publications

Rietveld Refinement, Morphology, and Optical and Photoluminescence Properties of a β-Ag_1.94Cu_0.06MoO₄ Solid Solution

Rietveld Refinement, Morphology, and Optical and Photoluminescence Properties of a β-Ag_1.94Cu_0.06MoO₄ Solid Solution

Tuning the structure, optical, and magnetic properties of nanostructured NiMoO4 by nitrogen plasma treatment

Synthesis, characterization and environmental remediation studies of Bi-substituted Li-Co spinel ferrites

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Elucidation of photocatalysis, photoluminescence and antibacterial studies of Ag2MoO4 decorated NiMoO4 nano-heterostructure

Cited by 48 publications

References 51 publications

Rietveld Refinement, Morphology, and Optical and Photoluminescence Properties of a β-Ag1.94Cu0.06MoO4 Solid Solution

Rietveld Refinement, Morphology, and Optical and Photoluminescence Properties of a β-Ag1.94Cu0.06MoO4 Solid Solution

Tuning the structure, optical, and magnetic properties of nanostructured NiMoO4 by nitrogen plasma treatment

Synthesis, characterization and environmental remediation studies of Bi-substituted Li-Co spinel ferrites

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Rietveld Refinement, Morphology, and Optical and Photoluminescence Properties of a β-Ag_1.94Cu_0.06MoO₄ Solid Solution

Rietveld Refinement, Morphology, and Optical and Photoluminescence Properties of a β-Ag_1.94Cu_0.06MoO₄ Solid Solution