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Micelle-assisted synthesis of Al2O3·CaO nanocatalyst: optical properties and their applications in photodegradation of 2,4,6-trinitrophenol.

Imtiaz A, Farrukh MA, Khaleeq-ur-rahman M, Adnan R - ScientificWorldJournal (2013)

Bottom Line: The as-synthesized nanocatalysts were further used as substrate for the synthesis of alumina doped calcium oxide (Al2O3·CaO) nanocatalysts via deposition-precipitation method at the isoelectric point of CaO.The Al2O3·CaO nanocatalysts were characterized by FTIR, XRD, TGA, TEM, and FESEM techniques.The direct optical band gap of the Al2O3·CaO nanocatalyst was found as 3.3 eV.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, GC University Lahore, 54000 Lahore, Pakistan.

ABSTRACT
Calcium oxide (CaO) nanoparticles are known to exhibit unique property due to their high adsorption capacity and good catalytic activity. In this work the CaO nanocatalysts were prepared by hydrothermal method using anionic surfactant, sodium dodecyl sulphate (SDS), as a templating agent. The as-synthesized nanocatalysts were further used as substrate for the synthesis of alumina doped calcium oxide (Al2O3·CaO) nanocatalysts via deposition-precipitation method at the isoelectric point of CaO. The Al2O3·CaO nanocatalysts were characterized by FTIR, XRD, TGA, TEM, and FESEM techniques. The catalytic efficiencies of these nanocatalysts were studied for the photodegradation of 2,4,6-trinitrophenol (2,4,6-TNP), which is an industrial pollutant, spectrophotometrically. The effect of surfactant and temperature on size of nanocatalysts was also studied. The smallest particle size and highest percentage of degradation were observed at critical micelle concentration of the surfactant. The direct optical band gap of the Al2O3·CaO nanocatalyst was found as 3.3 eV.

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TEM images of (a) CaO and (b) Al2O3·CaO nanocatalysts fabricated with surfactant (SDS).
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fig11: TEM images of (a) CaO and (b) Al2O3·CaO nanocatalysts fabricated with surfactant (SDS).

Mentions: Representative TEM image of the CaO and Al2O3·CaO nanocatalysts obtained after hydrothermal treatment is shown in Figure 11. The nanocatalysts exist in coagulated form with the particle size of 16 nm (Figure 11(a)). The particles size is decreased to 3.6 nm after the formation of Al2O3·CaO nanocatalysts (Figure 11(b)).


Micelle-assisted synthesis of Al2O3·CaO nanocatalyst: optical properties and their applications in photodegradation of 2,4,6-trinitrophenol.

Imtiaz A, Farrukh MA, Khaleeq-ur-rahman M, Adnan R - ScientificWorldJournal (2013)

TEM images of (a) CaO and (b) Al2O3·CaO nanocatalysts fabricated with surfactant (SDS).
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3842055&req=5

fig11: TEM images of (a) CaO and (b) Al2O3·CaO nanocatalysts fabricated with surfactant (SDS).
Mentions: Representative TEM image of the CaO and Al2O3·CaO nanocatalysts obtained after hydrothermal treatment is shown in Figure 11. The nanocatalysts exist in coagulated form with the particle size of 16 nm (Figure 11(a)). The particles size is decreased to 3.6 nm after the formation of Al2O3·CaO nanocatalysts (Figure 11(b)).

Bottom Line: The as-synthesized nanocatalysts were further used as substrate for the synthesis of alumina doped calcium oxide (Al2O3·CaO) nanocatalysts via deposition-precipitation method at the isoelectric point of CaO.The Al2O3·CaO nanocatalysts were characterized by FTIR, XRD, TGA, TEM, and FESEM techniques.The direct optical band gap of the Al2O3·CaO nanocatalyst was found as 3.3 eV.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, GC University Lahore, 54000 Lahore, Pakistan.

ABSTRACT
Calcium oxide (CaO) nanoparticles are known to exhibit unique property due to their high adsorption capacity and good catalytic activity. In this work the CaO nanocatalysts were prepared by hydrothermal method using anionic surfactant, sodium dodecyl sulphate (SDS), as a templating agent. The as-synthesized nanocatalysts were further used as substrate for the synthesis of alumina doped calcium oxide (Al2O3·CaO) nanocatalysts via deposition-precipitation method at the isoelectric point of CaO. The Al2O3·CaO nanocatalysts were characterized by FTIR, XRD, TGA, TEM, and FESEM techniques. The catalytic efficiencies of these nanocatalysts were studied for the photodegradation of 2,4,6-trinitrophenol (2,4,6-TNP), which is an industrial pollutant, spectrophotometrically. The effect of surfactant and temperature on size of nanocatalysts was also studied. The smallest particle size and highest percentage of degradation were observed at critical micelle concentration of the surfactant. The direct optical band gap of the Al2O3·CaO nanocatalyst was found as 3.3 eV.

Show MeSH