Photodegradation of a textile dye catalyzed by sol–gel derived nanocrystalline TiO2 via ultrasonic irradiation

Senthilkumaar, S.; Porkodi, K.; Vidyalakshmi, R.

doi:10.1016/j.jphotochem.2004.07.005

Cited by 79 publications

(38 citation statements)

References 47 publications

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“…pH 6.2 reached a decomposition efficiency of over 90% after an irradiation time of 2 h. Cat. pH 11 was associated with the near complete decomposition of MB after irradiation for 1 h. Notably, the MB concentration (100 ppm) tested herein is much higher than the 10 ppm tested in the literature [3,5,10]. A high initial MB concentration was removed completely in a short period, indicating that the well-dispersed nano-TiO 2 /Ag catalyst exhibited outstanding catalytic activity.…”

Section: Resultsmentioning

confidence: 58%

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Nanoscaled TiO2/Ag Catalysts and Their Photodecomposition Characteristics

2009

Sensors and Materials

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The concentration of AgNO 3 plays a significant role in the formation and growth of silver nanoparticles in the preparation of catalysts. When the concentration of AgNO 3 was decreased to 0.2 wt%, flakelike Ag was observed. The corresponding zeta potentials of the TiO 2 solution at pHs of 11, 6.2, and 3 suggest that the electric repulsion between the TiO 2 nanoparticles was very strong in both alkaline and acidic solutions, causing their "effective dispersion." Therefore, a highly dispersed nanostructured TiO 2 /Ag catalyst can be synthesized at a pH of 11 in alkaline solution. Nearly all the dimethyblue target pollutant present at high concentrations was removed when the photoreaction was performed over a short period of time. This novel nano-TiO 2 photocatalyst exhibits excellent photocatalytic activity because it is well-dispersed. In addition, no dispersant or organic binder was used for this synthetic process.

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Section: Resultsmentioning

confidence: 58%

“…The photodecomposition of various pollutants by TiO 2 has been demonstrated to be efficient under ultraviolet light. (1)(2)(3)(4)(5)(6)(7) The photocatalytic activity of TiO 2 can also be enhanced by modifying the TiO 2 surface with noble metals and metal oxides. (8) These photocatalysts are utilized in many approaches.…”

Section: Introductionmentioning

confidence: 99%

Nanoscaled TiO2/Ag Catalysts and Their Photodecomposition Characteristics

2009

Sensors and Materials

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“…This could be attributed to the increase of relative number of free radicals that attacking the dye molecule [27] . Therefore, the addition of inulin to the herbal extract could slow down the photohemolysis process at specific concentration range (1.0mg/ml -2.0mg/ml).…”

Section: Discussionmentioning

confidence: 99%

Sensitization of Photohemolysis by a New Extraction from Flowers and Aerial Parts of Cichorium Pumilum Jacq: Effects of Inulin and Hydrogen Peroxide

Al-Akhras¹,

Amin²,

Mohammad³

et al. 2007

American J. of Pharmacology and Toxicology

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Addition of inulin and hydrogen peroxide to new photosensitizers extracted from the flowers and aerial parts of the chicory (Cichorium Pumilum Jacq) have been investigated. Some of the isolated photosensitizers remain unidentified compounds. Chicory extracts are found to be dependent on light and temperature. Higher photohemolysis rate was noticed under the influence of light as compared to temperature. The effect of H 2 O 2 on phototoxicity reported in this study showed a rapid reduction in the fractional hemolysis percentage at higher temperature. Compared to erythrocytes with higher concentrations and under the influence of solar irradiance 505.29±24.96w/m 2 , erythrocytes with lower concentrations of inulin and H 2 O 2 were ruptured faster. Samples with 0.95mg/ml of herb extract and different concentrations of inulin (1mg/ml -2mg/ml) shows no temperature effects at 40 C in the absent of sunlight.

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“…The degradation of phenol by using titanium dioxide (TiO2) as a photocatalyst has received much attention because TiO2 can catalyze the oxidation of organic molecules with a low energy cost (Mahmoudi et al 2007;Chiou et al 2008;Laoufi et al 2008;Hafizah et al 2009). In the meantime, it offers other advantages, such as high photosensitivity, nontoxicity, and chemical stability (Hara et al 2000;Neppolian et al 2002;Konstantinou et al 2003;Senthilkumaar et al 2005). However, the powder form of TiO2 can cause secondary pollution.…”

Section: Introductionmentioning

confidence: 99%

Composite Paper Sheet Containing TiO2-diatomite for Removing Phenol in Aqueous Solution

Weng¹,

Qiu²,

Chen³

2017

BioResources

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a Composite paper sheet containing titanium dioxide and diatomite (TiDI) was prepared via a papermaking technique. The composite sheet was applied to remove phenol from aqueous solution. The composite sheet with a 2:1 mass ratio of cellulosic-fiber to TiDI removed phenol more effectively under UV irradiation than the composite paper sheet that utilized titanium dioxide (TiO2) alone. Composite paper sheets that contained TiDI with a TiO2/diatomite mass ratio of 1:2 removed phenol most effectively. The results showed that the TiDI composite paper could serve as a functional material to photodegrade phenol from aqueous solution under UV irradiation effectively.

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Photodegradation of a textile dye catalyzed by sol–gel derived nanocrystalline TiO2 via ultrasonic irradiation

Cited by 79 publications

References 47 publications

Nanoscaled TiO2/Ag Catalysts and Their Photodecomposition Characteristics

Nanoscaled TiO2/Ag Catalysts and Their Photodecomposition Characteristics

Sensitization of Photohemolysis by a New Extraction from Flowers and Aerial Parts of Cichorium Pumilum Jacq: Effects of Inulin and Hydrogen Peroxide

Composite Paper Sheet Containing TiO2-diatomite for Removing Phenol in Aqueous Solution

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