Highly active catalysts for the photooxidation of organic compounds by deposition of [60] fullerene onto the MCM-41 surface: A green approach for the synthesis of fine chemicals

Kyriakopoulos, John; Tzirakis, M. D.; Panagiotou, George D.; Alberti, M. N.; Triantafyllidis, Konstantinos S.; Giannakaki, Sofia; Bourikas, Kyriakos; Kordulis, Christos; Orfanopoulos, Michael; Lycourghiotis, Alexis

doi:10.1016/j.apcatb.2011.12.024

Cited by 24 publications

(32 citation statements)

References 64 publications

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“…Figs. 5(a-c) show the photocatalytic degradation of different -ln (Ct/Co) = Kappt (1) Kappt is apparent rate constant and Co initial concentration at t = 0 and Ct are the concentration of dye at t = t [43]. The kinetic plot and apparent rate constant (Kaap) (slop of the) in each case was shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Visible Light Photocatalytic Activity of Lead Selenide/Graphene/Titanium Dioxide Nanocomposite Synthesized via Ultra-Sonication Technique

Ali¹,

Oh²

2017

Asian J. Chem.

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In this study, we investigated the photo-degradation efficiency of PbSe-G-TiO2 ternary nanocomposite under visible light irritation using rhodamine B as standard dye, A nanocomposite was synthesized by ultra-sonication technique and characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Raman spectroscopic analysis and UV-visible absorbance spectra analysis. The results indicate that PbSe-G-TiO2 ternary nanocompsite has excellent stability and good photodegradation efficiency than PbSe-G and TiO2-G nanocomposite which is approximately 92.5 % of rhodamine B degradation after visible light irradiation for 180 min.

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Section: Resultsmentioning

confidence: 99%

Enhanced Visible Light Photocatalytic Activity of Lead Selenide/Graphene/Titanium Dioxide Nanocomposite Synthesized via Ultra-Sonication Technique

Ali¹,

Oh²

2017

Asian J. Chem.

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“…The samples containing 1 and 3 wt % of C 60 (1C 60 /MCM-41, 3C 60 /MCM-41) were prepared following the dry impregnation procedure [31]. The photocatalysts with 6, 9, and 12 wt % C 60 (6C 60 /MCM-41, 9C 60 /MCM-41, 12C 60 /MCM-41) were synthesized by wet impregnation [32].…”

Section: Photocatalysts: Preparation and Characterizationmentioning

confidence: 99%

“…The photocatalysts with 6, 9, and 12 wt % C 60 (6C 60 /MCM-41, 9C 60 /MCM-41, 12C 60 /MCM-41) were synthesized by wet impregnation [32]. The MCM-41 mesoporous silica was synthesized according to the method reported in [31]. The impregnating solutions were prepared by dissolving the proper amount of C 60 (Merck, Darmstadt, Germany, 99.5%) in 1,2-dichlorobenzene (for synthesis-Merck, Schuchardt, Germany).…”

Section: Photocatalysts: Preparation and Characterizationmentioning

confidence: 99%

“…In particular, the photoreactivity of C 60 has received considerable attention due to its electron acceptability, intense absorption in near-UV light, and broad absorbance in the visible light region. A number of studies of our group have been reported dealing with C 60 as a photocatalyst [27][28][29][30][31][32]. However, there are very few studies on the photocatalytic performance of C 60 in aqueous solutions because it exhibits very low solubility in this solvent.…”

Section: Introductionmentioning

confidence: 99%

“…Non-semiconducting materials like γ-Al 2 O 3 , SiO 2 , and MCM-41 exhibit high surface areas suitable to immobilize highly dispersed C 60 moieties [27,[29][30][31][32]34]. Recently, the photocatalytic degradation of methyl orange has been achieved even under visible irradiation over C 60 /SiO 2 photo-catalyst in the presence of ascorbic acid [20].…”

Section: Introductionmentioning

confidence: 99%

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Decolorization of Orange-G Aqueous Solutions over C60/MCM-41 Photocatalysts

et al. 2019

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The majority of the photocatalysts studied for azo-dye degradation are based on semiconductor materials. Studies reported on non-semiconducting materials are very scarce. In the present work, we studied the fullerene (C60) ability to accelerate photodegradation of the dye’s azo bond in the presence of ascorbic acid. A series of C60 supported on ordered mesoporous silica (MCM-41) catalysts, containing 1, 3, 6, 9, and 12 wt % of fullerene C60, was studied using Orange G (OG) as representative azo-dye. This study showed that partial decolorization is achieved in the dark by simple adsorption of the dye on the bare surface of the carrier. The extent of decolorization increases with the irradiation of the suspension due to photocatalytic degradation of the azo-bond. This is maximized over the sample containing 3 wt % of C60 and it has been attributed to the best combination of the extent of the dye adsorption with the high intrinsic photocatalytic activity of small C60 clusters predominated in this sample. This catalyst proved to be quite stable upon five subsequent photocatalytic cycles, losing less than 5% of its initial activity. No degradation of OG takes place in the absence of ascorbic acid.

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