Surface photochemistry: efficient photocatalysis by CdS supported on a solid surface

Mayo, P. De; Muthuramu, K.; Wong, Wun Kho

doi:10.1007/bf00764738

Cited by 7 publications

(2 citation statements)

References 38 publications

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“…Photocatalytic oxidation (degradation) of organic compounds by semiconducting materials such as TiO 2 [2,3], SnO 2 [4], ZrO 2 [5] , ZnO [6], CdS [7], and Fe 2 O 3 [8] has been used for environmental cleaning. Among the various semiconductors, titanium dioxide (TiO 2 ) is the most widely used photocatalyst due to its non-toxicity, high activity, photostability, chemical stability, biological inertness, the good absorption/desorption rate of reactants (especially oxygen) and low cost [2].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic activity of polyaniline-TiO2 nanocomposites

2011

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The characteristics of the UV illumination-assisted degradation of Malachite green (MG) on highly active nanostructured-anatase TiO 2 , bulk Polyaniline (PAni), PAni nanoparticles and PAni-TiO 2 nanocomposites have been studied. Dodecylbenzene sulphonic acid doped PAni-TiO 2 nanocomposites were synthesized by a water-assisted self-assembly method. Samples were characterized using transmission electron microscopy, X-ray diffraction studies, Fourier Transform Infra red spectroscopy and photoluminescence studies. Photoluminescence intensity of TiO 2 nanoparticles was found to decrease with the increase of PAni in the nanocomposite which can be attributed to the reduction of electron-hole pair recombination at the interface of PAni and TiO 2 due to electron transfer from TiO 2 to PAni. Exposure to UV light brought about the photocatalytic oxidation of MG in contact with bulk PAni, PAni and TiO 2 nanoparticles, and PAni-TiO 2 nanocomposites. The decrease in absorbance was measured, and its kinetics was analyzed using the Langmuir-Hinshelwood kinetic model. PAni-TiO 2 nanocomposites exhibit higher photocatalytic activity than pure TiO 2 nanoparticles, bulk PAni and PAni nanoparticles under the same degradation condition for MG. The enhanced photocatalytic activity of nanocomposites is attributed to the electron transfer from TiO 2 to PAni resulting in enhancing the oxidative property of the TiO 2 nanoparticles.

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Section: Introductionmentioning

confidence: 99%

Photocatalytic activity of polyaniline-TiO2 nanocomposites

2011

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“…Richard et al [4] reported that oxidizing species involved in the photocatalytic transformations on zinc oxide is either hole or hydroxyl radicals. de Mayo et al [5] used CdS supported on a solid surface for catalysis.A kinetic study of photoinduced electron transfer reactions sensitized by colloidal CdS has been reported by Green and Mills [6].…”

Section: Introductionmentioning

confidence: 99%