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Abstract

ABSTRACT:The photocatalytic degradation of indigo carmine was investigated by using rubber sheet impregnated with titanium dioxide particles. The characteristics of the impregnated sheet were studied using scanning electron microscopy and X-ray diffraction. The degradation was monitored by measuring the change of dye concentration as a function of irradiation time under UV light. The anatase impregnated sheet showed higher degradation efficiency than the P25 impregnated sheet. The effects of solution pH, dye initial concentration, and intensity of UV light on the photodegradation were investigated. Kinetics of photocatalytic degradation was of a first-order reaction. The used TiO2-impregnated sheets can be recovered and reused with no decline in the photodegradation efficiency.

Conjugated Polymer/Nanocrystal Nanocomposites for Renewable Energy Applications in Photovoltaics and Photocatalysis

“…Semiconductor photocatalysts are usually in the form of powder, which possess large surface areas when dispersed in the reaction solution. There remain, however, several drawbacks affecting the practical use of powdery semiconductor photocatalysts: (i) time‐consuming procedures for retracting photo­catalysts from the reaction solution, and the inevitable loss of photocatalysts; (ii) the dust of powdery photocatalyst is a risk factor to human health; (iii) photocatalyst aggregation decreases the total surface area during the photocatalytic reaction, and decreases the photocatalytic activity . An effective strategy to solve these problems is to immobilize the photocatalysts on a polymeric support.…”

“…The ideal polymeric support should satisfy several features: good adhesion with the photocatalyst; a large specific surface area; high adsorption capability toward the reaction species; high chemical inertness; and good mechanical stability. Several methods have been developed to immobilize photocatalysts on polymeric supports, including electrospinning, sol–gel methods, atomic layer deposition, solvent‐casting process, hydrothermal methods, solvothermal methods, solution polymerization, ion exchange, and impregnation . Most of these methods can be performed at relatively low temperature to avoid damage to the polymeric supports.…”

AC/TiO2/Rubber Composite Sheet Catalysts; Fabrication, Characterization and Photocatalytic Activities

“…Thefabrication of ACTR sheets were fabricatedby a modifiedmethod of ours group, has been reported previously [10].For the fabrication of ACTR sheet, 0.03 g of TiO 2 (Degussa P25) powder was mixed with 5 mL of ammonia solution and was stirred for 5 min after which 5 mL of natural rubber latex was added and then stirred for 10 min. After that, 1 mL (1mg/mL) of activated carbon aqueous suspension was added in the mixture above and stirred for another 10 min.…”

“…The photocatalytic activities of ACTR composite sheets were evaluated by monitoring decolorization of MB dye solution (2.5×10 -5 M) in a similar manner as has been described previously [10]. The concentrations of MB dye solution samples after photodegradation were analyzed using a UV-Visible spectrophotometer (Evolution 201, Thermo Scientific, USA).…”

Synergistically enhanced solar light‐driven degradation of hazardous food colorants by ultrasonically derived MgFe2O4/S‐doped g‐C3N4 nanocomposite: A Z‐scheme system‐based heterojunction approach

“…[14] It is well-documented in the literature that the IC is considered as highly toxic/ carcinogenic additive whose presence in the water environment may cause tumor at the site of application, reproductive and neuronal toxicity, eye or skin irritation, permanent injury to cornea and conjunctiva, cyclotoxicity, respiratory, and gastro intestinal tract (GIT) irritations in living organisms. [15][16][17] It has been mentioned in a study that greater than 100,000 various groups of such colorants are available commercially; among these, more than 1.6 million tons are produced annually. As a consequence of which approximately 10%-15% of its volume gets discharge as waste into rivers and ponds in the form of industrial effluents.…”