Structural, photocatalytic and electrochemical studies on facile combustion synthesized low-cost nano chromium (III) doped polycrystalline magnesium aluminate spinels

Pratapkumar, C.; Prashantha, S.C.; Kumar, Vinit; Santosh, M.S.; Ravikumar, C.R.; Anilkumar, M.; Shashidhara, T.S.; Swamy, C. Nanjunda; Jahagirdar, A.A.; Alam, Mir Waqas; Chen, Zhong; Bui, Xuan‐Thanh

doi:10.1016/j.jsamd.2021.05.009

Cited by 9 publications

(5 citation statements)

References 30 publications

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“…In recent times, researchers have been more interested in nanosized metal oxides as photocatalysts for their possible usefulness in wastewater treatment [3][4][5][6][7][8][9][10][11][12]. Nanosized materials offer improved degradation efficiencies compared with micro and bulk materials because they provide good characteristic outcomes through a quantum containment effect [13].…”

Section: Introductionmentioning

confidence: 99%

“…It also has adverse effects on aquatic life. Nanometal oxides are a viable option for the treatment of wastewater and have been used in a range of applications, such as fuel cells, gas sensors, solar cells, water storage, antimicrobial activities [8][9][10][11][12]. The interest shown in synthesizing metal oxides with more appealing morphologies was tremendous.…”

Section: Introductionmentioning

confidence: 99%

“…Nanosized metal oxides have been synthesized using various methods since their size, shape, and structure, such as nanospheres, nanowires, nanocombs, nanoleaves, and nanobelts, are related to the characteristics of these nanomaterials [13][14][15][16]. Recent publications have focused on synthesizing nanometal oxides using different physical and chemical techniques, such as sol-gel, hydrothermal, precipitation, thermal breakdown, and combustion methods [7][8][9][10][11][12]. The production of nanosized metal oxide in superior morphological forms or sizes is of growing importance.…”

Section: Introductionmentioning

confidence: 99%

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Green Synthesis of Ni-Cu-Zn Based Nanosized Metal Oxides for Photocatalytic and Sensor Applications

et al. 2021

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The preparation, characterization, and application of Nickel oxide (NiO)–Copper oxide (CuO)–Zinc oxide (ZnO) transition nanometal oxides have significantly enhanced their tunable properties for superior multifunctional performances compared with well-known metal oxides. NiO–CuO–ZnO nano transition metal oxides were synthesized by a simple eco-friendly solution combustion method. X-ray diffraction studies revealed distinct phases such as monoclinic, cubic, and hexagonal wurtzite for CuO, NiO, and ZnO, respectively, with NiO having the highest composition. The particle sizes were found to be in the range between 25 and 60 nm, as determined by powder X-ray diffraction. The energy bandgap values were found to be 1.63, 3.4, and 4.2 eV for CuO, ZnO, and NiO, respectively. All metal oxides exhibited a moderate degradation efficiency for AR88 dye. The results of ultraviolet–visible absorption spectra helped identify the bandgap of metal oxides and a suitable wavelength for photocatalytic irradiation. Finally, we concluded that the electrochemical studies revealed that the synthesized materials are well suitable for sensor applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Green Synthesis of Ni-Cu-Zn Based Nanosized Metal Oxides for Photocatalytic and Sensor Applications

et al. 2021

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“…Among the available physical/chemical treatment methods, semiconductor-based photocatalysis has been regarded as an economical and renewable technology for the purification of contaminated water because of several advantages, including environmental protection, low cost, low energy consumption, complete degradation of pollutants and no secondary pollution [8,9]. Hence, many efforts have been conducted to investigate elimination processes of organic pollutants by using semiconductor photocatalysts, such as ZnO [4,10], TiO 2 [11,12], ZnS [13], SnO 2 [14], Nb 2 O 5 [15], BaTiO 3 [16], NaFeS 2 [8], etc.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and photocatalytic efficiency of Fe3O4/SiO2/TiO2, SrFe12O19/SiO2/TiO2 and Fe3O4/SiO2/ZnO core/shell/shell nanostructures

Bavarsiha

Dadashian²,

Montazeri-Pour

et al. 2022

PAC

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In this research, three magnetically separable photocatalysts, Fe3O4/SiO2/TiO2, SrFe12O19/SiO2/TiO2 and Fe3O4/SiO2/ZnO, with core/shell/shell structures were successfully prepared. In the first step, soft magnetic and hard magnetic Fe3O4 and SrFe12O19 powders were synthesized using carbon reduction and co-precipitation routes, respectively. In the second step, silica coating was performed by controlling the hydrolysis and con- densation of tetraethyl orthosilicate (TEOS) precursor on the magnetic cores. In the third step, a layer of TiO2 or ZnO photocatalytic shells was made on the as-prepared composites using titanium n-butoxide (TNBT) or zinc nitrate hexahydrate, respectively. The formation of the core/shell/shell structures was confirmed by FESEM and TEM analyses. The saturation magnetizations of the Fe3O4/SiO2/TiO2, SrFe12O19/SiO2/TiO2 and Fe3O4/SiO2/ZnO photocatalytic materials were 41.5, 33 and 49 emu/g, respectively. Photocatalytic activity was evaluated by degradation percentages of methylene blue (MB) under UV illumination, which were 88%, 83% and 62%, for the Fe3O4/SiO2/TiO2, SrFe12O19//TiO2 and Fe3O4/SiO2/ZnO composites, respectively. The first-, and second-order reaction kinetics were used to find out the suitable MB removal kinetics.

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“…The peak centered at 1581 cm −1 is representing C=C stretching mode due to the presence of MWCNT in MgAl 2 O 4 /MWCNT nanocomposite. In the last, the absorption peak centered at 2360 cm −1 is due to the presence of atmospheric CO 2[43][44][45][46][47].…”

mentioning

confidence: 99%

Facile fabrication of MgAl₂O₄/MWCNT nanocomposite for efficient and stable solar-driven degradation of organic dye

Ahmad,

Hussain,

Shuaib

et al. 2024

Phys. Scr.

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This work reports the synthesis and characterization of Magnesium Aluminate (MgAl2O4) and Magnesium Aluminate/Multi Walled Carbon Nanotube (MgAl2O4/MWCNT) nanocomposites by facile chemical co-precipitation method for the dye degradation application. MgAl2O4 and MgAl2O4/MWCNT nanocomposite are characterized by Scanning Electron Microscopy (SEM), X-Ray Diffractometery (XRD), Raman spectrometry, UV-Vis Spectrophotometery (UV-Vis), Fourier Transform Infrared Spectrometry (FTIR), and X-ray Photoelectron Spectroscopy (XPS). Surface morphology of MgAl2O4/MWCNT nanocomposite exhibits entangled needle like structures while MgAl2O4 spinel comprises of agglomerated nanoparticles of different sizes. XRD confirms the formation of MgAl2O4. XPS identifies the chemical states and binding energies of constituent elements present in the sample. Optical properties reveal that addition of MWCNTs in MgAl2O4 decreases the optical bandgap energy from 3.02 eV to 2.78 eV. MgAl2O4/MWCNT nanocomposite shows reduced bandgap compared to pristine MgAl2O4 due to increased chemical defects or vacancies in intergranular regions and chemical interaction between MgAl2O4 and MWCNT, leading to formation of new energy levels in MgAl2O4/MWCNT nanocomposite. The addition of MWCNTs provides large surface area, more active sites, and enhances electrons mobility between energy levels. MgAl2O4/MWCNT nanocomposite proves itself a better photocatalyst due to fast degradation of Methyl Blue (MB) in 65 min as compared to MgAl2O4 which degrades the dye in 90 minutes. MgAl2O4/MWCNT nanocomposite also shows good stability and reusability even after performing the six cycles of dye degradation.

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Structural, photocatalytic and electrochemical studies on facile combustion synthesized low-cost nano chromium (III) doped polycrystalline magnesium aluminate spinels

Cited by 9 publications

References 30 publications

Green Synthesis of Ni-Cu-Zn Based Nanosized Metal Oxides for Photocatalytic and Sensor Applications

Green Synthesis of Ni-Cu-Zn Based Nanosized Metal Oxides for Photocatalytic and Sensor Applications

Synthesis, characterization and photocatalytic efficiency of Fe3O4/SiO2/TiO2, SrFe12O19/SiO2/TiO2 and Fe3O4/SiO2/ZnO core/shell/shell nanostructures

Facile fabrication of MgAl₂O₄/MWCNT nanocomposite for efficient and stable solar-driven degradation of organic dye

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Structural, photocatalytic and electrochemical studies on facile combustion synthesized low-cost nano chromium (III) doped polycrystalline magnesium aluminate spinels

Cited by 9 publications

References 30 publications

Green Synthesis of Ni-Cu-Zn Based Nanosized Metal Oxides for Photocatalytic and Sensor Applications

Green Synthesis of Ni-Cu-Zn Based Nanosized Metal Oxides for Photocatalytic and Sensor Applications

Synthesis, characterization and photocatalytic efficiency of Fe3O4/SiO2/TiO2, SrFe12O19/SiO2/TiO2 and Fe3O4/SiO2/ZnO core/shell/shell nanostructures

Facile fabrication of MgAl2O4/MWCNT nanocomposite for efficient and stable solar-driven degradation of organic dye

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Facile fabrication of MgAl₂O₄/MWCNT nanocomposite for efficient and stable solar-driven degradation of organic dye