Influence of Citric Acid/Urea on High Performance Magnesia–Zirconia Nanocomposite: Synthesis, Characterization and Catalytic Approaches

Keerthana, L.; Sakthivel, C.; Prabha, I.

doi:10.1007/s10562-019-02824-5

Cited by 2 publications

(2 citation statements)

References 24 publications

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“…The different catalysts weights such as 2.5, 5.0, 7.5, 10 and 12.5 mg at pH=7.0 with the concentration of 0.25 mmol of 4‐nitrophenol respectively. 4‐nitrophenol was changed to an intermediate (phenolate ion) and it got converted to 4‐aminophenol at room temperature [37] . However, addition of NaBH 4 to 4‐NP led to the colour change in yellow confirms the formation of phenolate ions become dominant species due to the alkalinity of the solution.…”

Section: Resultsmentioning

confidence: 99%

“…(phenolate ion) and it got converted to 4-aminophenol at room temperature. [37] However, addition of NaBH 4 to 4-NP led to the colour change in yellow confirms the formation of phenolate ions become dominant species due to the alkalinity of the solution. The unexpected catalytic activity of trimetal oxide may originated from the synergistic effect of three elements.…”

Section: Chemistryselectmentioning

confidence: 93%

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Surfactant‐Enhanced Nano Spinel Oxide for Applications in Catalysis, Dye Degradation and Antibacterial Activity

Nivetha

Prabha

2022

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Novel surfactant supported MnÀ CoÀ Ni oxide was effectively synthesized by simple and economic co-precipitation method to investigate the efficiency of catalytic reduction of 4-nitrophenol, degradation of methylene blue and antibacterial properties. The optical, structural and chemical compositions were cautiously analyzed by X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), X-ray photoelectron microscopy (XPS), ultraviolet-visible (UV-Vis), Fourier transform infrared (FT-IR), Brunauer-Emmett-Teller (BET) and dynamic light scattering (DLS) analyses. XRD analysis showed cubic structure with average crystallite size of 19-21 nm. FESEM images confirmed the combination of spherical, needle, plate and rod like shapes. Accordingly, a high specific surface area of 55.66 m 2 g À 1 was achieved by urea/MnÀ CoÀ Ni oxide. Band gap of ternary metal oxide was found in the range of 3.4-3.6 eV. The XPS analysis confirmed the presence of manganese, cobalt and nickel as major parts with a 2p core level region. The MÀ O bond formation was confirmed by the peak appeared in the range of 500-600 cm À 1 . The negative charge of ternary metal oxide was confirmed by negative zeta potential value. The reduction of 4-nitrophenol was carried out by MnÀ CoÀ Ni oxide with the efficiency of > 99 % and the degradation efficiency against methylene blue was studied. The synthesized catalyst was potent against S. aureus at higher concentration.

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Section: Resultsmentioning

confidence: 99%

Section: Chemistryselectmentioning

confidence: 93%

Surfactant‐Enhanced Nano Spinel Oxide for Applications in Catalysis, Dye Degradation and Antibacterial Activity

Nivetha

Prabha

2022

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Enriching the Surface Properties of Novel SnO2 Doped CoZnO2 Nanocomposite for Photocatalytic, Reduction and Bio‐Medicinal Applications

Prabha,

Baskar,

Nivetha

et al. 2024

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Novel CoZnO2 and SnO2 doped CoZnO2 nanocomposites (NCs) were synthesized by the co‐precipitation method successfully and analyzed using UV‐Vis, FT‐IR, XRD and SEM analysis etc. The UV‐Vis studies confirmed the absorption values of CoZnO2 and SnO2 doped CoZnO2 at 359 and 365 nm respectively and the obtained FT‐IR peaks at 569 and 538 cm−1 revealed the presence of metal‐oxygen bonds successfully. The crystalline size was found to be 21.46 and 40.35 nm. In SEM analysis, CoZnO2 showed the densified un‐uniform particles whereas SnO2 doped CoZnO2 NCs seemed to be bunch of particles combined together. The synthesized NCs have proved the photocatalytic property by confirming the degradation efficiency of 72.22 and 82.22 % against methylene blue (MB) under sunlight irradiation as natural source at the time interval of 120 mins. It is revealed by the enhancement in the reduction of 4‐nitrophenol by changing the parameters and the efficiency percentage of 89.46 and 94.52 % at 18 and 16 mins respectively. The adsorption study was carried out by changing different concentrations of targeted pesticide like glyphosate and the percentage (%) efficiency was calculated to be 90.90, 83.53, 78.49 %, and 91.02, 88.23, 80.64 % for CoZnO2 and SnO2 doped CoZnO2 effectively. The high inhibition against DPPH was found to be 42.7 and 53.7 % at 500 μg mL−1 and the maximum zone of inhibition was found to be 22 mm against to 240 μg mL−1 of E. coli. Therefore, the current study proposed that the CoZnO2 and SnO2 doped CoZnO2 have good capability for bio‐chemical catalytic applications.

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Influence of Citric Acid/Urea on High Performance Magnesia–Zirconia Nanocomposite: Synthesis, Characterization and Catalytic Approaches

Cited by 2 publications

References 24 publications

Surfactant‐Enhanced Nano Spinel Oxide for Applications in Catalysis, Dye Degradation and Antibacterial Activity

Surfactant‐Enhanced Nano Spinel Oxide for Applications in Catalysis, Dye Degradation and Antibacterial Activity

Enriching the Surface Properties of Novel SnO2 Doped CoZnO2 Nanocomposite for Photocatalytic, Reduction and Bio‐Medicinal Applications

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