Synthesis and characterization of Al2O3–SiO2–MgO nanocomposite prepared by sol–gel process as an efficient catalyst for the Knoevenagel condensation of aldehydes with malononitrile

Mobarakeh, Mahmood Iranpour; Saffar‐Teluri, Ali; Hassanzadeh-Tabrizi, S.A.

doi:10.1007/s11164-014-1765-8

Cited by 6 publications

(3 citation statements)

References 37 publications

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“…Silica (SiO 2 ), an inert coating material, is also used to reduce toxicity, promote stability, biodegradability, and biocompatibility, and to prevent nanoparticle aggregation. [ 12 ] Based on the literature, some of the silica‐based nanocomposites such as Ag/SiO 2, [ 13 ] PdNi/C, [ 14 ] Au@SiO 2 , and SiO 2 @Au core–shell, [ 15 ] SiO 2 @Au@GO, [ 16 ] Zr‐SiO 2 , [ 17 ] NiO/SiO 2 , [ 18 ] CuO‐SiO 2 , [ 19 ] Al 2 O 3 ‐SiO 2 , [ 20 ] TiO 2 ‐SiO 2 ‐S, [ 21 ] Al 2 O 3 ‐SiO 2 ‐MgO, [ 22 ] CoFe 2 O 4 /SiO 2 , [ 23 ] and Fe 3 O 4 ‐SiO 2 , [ 24 ] etc., have been reported and gained interest due to the low refractive index and higher thermal and mechanical stability of SiO 2 . [ 25 ] However, iron‐based composites such as Fe 3 O 4 ‐SiO 2 are known for their potential applications in drug delivery, biocatalysis, heavy metals removal, photocatalysis, MRI contrast agents, biomolecular separations, biomarker immobilization, etc.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Fe₃O₄−SiO₂ Nanocomposites for Wastewater Treatment

Yaseen

Khan

Humayun

et al. 2023

Macro Materials & Eng

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Water constitutes ≈70–90% of the organism's body by mass and is highly important for its survival. Water contains a variety of chemical contaminants introduced by various sectors, resulting in contamination that has a direct impact on the ecosystem. Various approaches are in practice to tackle these issues. Among these, semiconductor photocatalysis appears to be the cutting‐edge technology for the degradation of wastewater contaminants. Herein, the fabrication of Fe3O4−SiO2 nanocomposite via facile co‐precipitation and Stober methods are reported. Various characterization techniques are employed for the structural elucidation, morphology, crystallinity, and stability of the as‐prepared composite. The nanocomposite is employed in catalytic and photocatalytic applications toward the removal of methylene blue (MB) and methyl orange (MO) dyes from a comparative perspective. It is observed that the composite can remove about 93% of MB and 51% of MO within 7 and 6 h, respectively. These findings indicate that the nanocomposite has a higher MB removal effectiveness than the MO. This trend can be accredited to the difference in the chemical structure of both dyes. The nanocomposite is also evaluated for antioxidant and antileishmanial activity, and it is shown to be quite effective even at very low concentrations.

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Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Fe₃O₄−SiO₂ Nanocomposites for Wastewater Treatment

Yaseen

Khan

Humayun

et al. 2023

Macro Materials & Eng

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“…The nanocomposite has different properties like mechanical, electrochemical, electrical, catalytic, thermal and optical from the components from which it is formed 1 . Many nanocomposites have been synthesized successfully, but Silica‐based nanocomposites like TiO 2− SiO 2 , Ag/SiO 2, 2 CoFe 2 O 4 /SiO 2, 3 Au@SiO 2 and SiO 2 @Au core‐shell, 4 SiO 2 ‐Fe 3 O 4, 5 SiO 2 @Au@GO, 6 Zr‐SiO 2, 7 NiO/SiO 2, 8 Al 2 O 3 ‐SiO 2, 9 TiO 2 ‐SiO 2 ‐S, 10 Al 2 O 3 ‐SiO 2 ‐MgO, 11 CuO/SiO 2 12 etc. have gotten tremendous popularity as compared to others because of little refractive index and a great degree of thermal and mechanical stability of silica (SiO 2 ) 13 .…”

Section: Introductionmentioning

confidence: 99%

“…Al 2 O 3 -SiO 2, 9 TiO 2 -SiO 2 -S, 10 Al 2 O 3 -SiO 2 -MgO, 11 CuO/-SiO 2 12 etc. have gotten tremendous popularity as compared to others because of little refractive index and a great degree of thermal and mechanical stability of silica (SiO 2 ).…”

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confidence: 99%

CuO‐SiO₂ based nanocomposites: Synthesis, characterization, photocatalytic, antileishmanial, and antioxidant studies

Yaseen

Farooq

Khan

et al. 2022

J Chinese Chemical Soc

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The abatement of toxic pollutants and drug-resistant pathogens from water is one of the major environmental issues. In this work, we are reporting the preparation, detailed characterization and photocatalytic degradation, and biological activities of bimetallic oxides (CuO-SiO 2 ) nanocomposite. For this purpose, CuO, SiO 2 nanoparticles, and CuO-SiO 2 nanocomposites were successfully synthesized through sol-gel process. The nanoparticles and nanocomposite were prepared by taking the Cu(NO 3 ) 2 .3H 2 O as copper oxide precursor and TEOS as silica precursor using absolute ethanol and water as solvents The molar ratio of TEOS: Glycerol: H 2 O used was 1.5:1:6.6 respectively. The synthesized nanoparticles and nanocomposites were characterized by using Scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET). The nanocomposites and individual nanoparticles were then applied as catalysts for their activities toward catalytic/ photocatalytic degradation of crystal violet (CV) dye in an aqueous medium.The degradation progress was monitored by UV-Visible spectroscopic analysis. It was found that CuO-SiO 2 nanocomposite shows good photocatalytic activities toward the removal of crystal violet dye as compared to the catalytic activities of its individual constitutes. The antileishmanial and antioxidant activities results indicate that synthesized materials have promising biological attributes.

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The high efficiency of Al2O3–SiO2–CuO nanocomposites as an adsorbent: synthesis and dye removal efficiency

2015

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Synthesis and characterization of Al2O3–SiO2–MgO nanocomposite prepared by sol–gel process as an efficient catalyst for the Knoevenagel condensation of aldehydes with malononitrile

Cited by 6 publications

References 37 publications

Facile Synthesis of Fe₃O₄−SiO₂ Nanocomposites for Wastewater Treatment

Facile Synthesis of Fe₃O₄−SiO₂ Nanocomposites for Wastewater Treatment

CuO‐SiO₂ based nanocomposites: Synthesis, characterization, photocatalytic, antileishmanial, and antioxidant studies

The high efficiency of Al2O3–SiO2–CuO nanocomposites as an adsorbent: synthesis and dye removal efficiency

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Synthesis and characterization of Al2O3–SiO2–MgO nanocomposite prepared by sol–gel process as an efficient catalyst for the Knoevenagel condensation of aldehydes with malononitrile

Cited by 6 publications

References 37 publications

Facile Synthesis of Fe3O4−SiO2 Nanocomposites for Wastewater Treatment

Facile Synthesis of Fe3O4−SiO2 Nanocomposites for Wastewater Treatment

CuO‐SiO2 based nanocomposites: Synthesis, characterization, photocatalytic, antileishmanial, and antioxidant studies

The high efficiency of Al2O3–SiO2–CuO nanocomposites as an adsorbent: synthesis and dye removal efficiency

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Facile Synthesis of Fe₃O₄−SiO₂ Nanocomposites for Wastewater Treatment

Facile Synthesis of Fe₃O₄−SiO₂ Nanocomposites for Wastewater Treatment

CuO‐SiO₂ based nanocomposites: Synthesis, characterization, photocatalytic, antileishmanial, and antioxidant studies