Transition Metal Ion Impregnated Mesoporous TiO<sub>2</sub> for Photocatalytic Degradation of Organic Contaminants in Water

Tayade, Rajesh J.; Kulkarni, R.G.; Jasra, Raksh V.

doi:10.1021/ie051362o

Cited by 175 publications

(114 citation statements)

References 41 publications

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“…At the same time, As(V) is effectively removed by adsorption onto the surface of composites. Tayade et al, 22 have prepared mesoporous nanocrystalline TiO 2 by hydrolysis of TTIP, and the band gap of the TiO 2 was modified with transition metal ions Ag, Co, Cu, Fe, and Ni having different work functions by the wet impregnation method. The investigations were carried out to demonstrate the effect of ionic radius and work function of metal ions on photocatalytic activity of mesoporous TiO 2 for degradation of acetophenone (AP) and nitrobenzene (NB) in aqueous medium under ultraviolet light irradiation.…”

Section: Fe (Iii) Doped Tiomentioning

confidence: 99%

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Mesoporous titania photocatalysts: preparation, characterization and reaction mechanisms

2011

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Titanium dioxide is a very important semiconductor with a high potential for applications in photocatalysis, solar cells, photochromism, sensoring, and various other areas of nanotechnology. Increasing attention has recently been focused on the simultaneous achievement of high bulk crystallinity and the formation of ordered mesoporous TiO 2 frameworks with high thermal stability. Mesoporous TiO 2 has continued to be highly active in photocatalytic applications because it is beneficial for promoting the diffusion of reactants and products, as well as for enhancing the photocatalytic activity by facilitating access to the reactive sites on the surface of photocatalyst. This steady progress has demonstrated that mesoporous TiO 2 nanoparticles are playing and will continue to play an important role in the protection of the environment and in the search for renewable and clean energy technologies. This review focuses on the preparation and characterisation of mesoporous titania, noble metals nanoparticles, transition metal ions, non-metal/doped mesoporous titania networks. The photocatalytic activity of mesoporous titania materials upon visible and UV illumination will be reviewed, summarized and discussed, in particular, concerning the influence of preparation and solid-state properties of the materials. Reaction mechanisms that are being discussed to explain these effects will be presented and critically evaluated.

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Section: Fe (Iii) Doped Tiomentioning

confidence: 99%

“…The silver impregnated catalysts showed the highest initial rate of photocatalytic degradation for both compounds due to the interstitial position of impregnated silver metal ion in the TiO 2 lattice. 22 …”

Section: Fe (Iii) Doped Tiomentioning

confidence: 99%

Mesoporous titania photocatalysts: preparation, characterization and reaction mechanisms

2011

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“…The 125 W mercury vapor lamp (Crompton, high pressure mercury vapor lamp, with the glass bulb removed, radiation wavelength of 280-450 nm, photon flux = 0.51 mW/cm 2 ) was used as a UV irradiation source for reactions. The spectral distribution of the high pressure mercury vapor lamp was reported earlier (Tayade et al 2006). The second outer part consists of a borosilicate glass container possessing volume of 250 mL after the insertion of inner part and the solution to be degraded was placed inside the borosilicate glass container.…”

Section: Photocatalytic Activitymentioning

confidence: 96%

Study on identification of leather industry wastewater constituents and its photocatalytic treatment

Natarajan

Bajaj

et al. 2013

Int. J. Environ. Sci. Technol.

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The present research work was intended to find out the useful information on identification, separation and photocatalytic degradation of organic compounds present in leather industry wastewater. The separation of organic compounds present in leather industry wastewater was carried out by solvent extraction. The separated crude extracted products were purified through column chromatography and characterized by UV-vis spectrophotometer, gas chromatography-mass spectrophotometer, liquid chromatographymass spectrophotometer, 1 H and 13 C Fourier-transform nuclear magnetic resonance spectroscopy. The elemental analysis of wastewater and solid residue was carried out by inductively coupled plasma-optical emission and X-ray fluorescence spectroscopy. The organic compounds such as nonadec-1-ene, 2-phenylethanol, 2,4-di-tert-butylphenol and other organic compounds in the leather industry wastewater were identified. Out of these organic compounds, 2-phenylethanol was photocatalytically degraded using standard Degussa P-25 TiO 2 (100 mg) photocatalyst under the irradiation of UV light. Result has been shown that 2-phenylethanol was transformed into 2-tert-butyl-4,6-dimethylphenol, 2,6-di-tert-butyl-4-methylphenol then the prolonged time (30 h) irradiation leads to 100 % degradation of 2-phenylethanol. Further possible degradation mechanism of 2-phenylethanol was proposed based on the electrospray ionization mass spectrometry analysis of degraded samples. The degradation of 2-phenylethanol was confirmed by chemical oxygen demand analysis of degraded samples. The physicochemical parameters such as pH, color, chemical oxygen demand, total dissolved solids, electrical conductivity and ionic chromatography analysis of the leather industry wastewater were also measured.

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“…For this reason, a new method was recently developed that uses an alternative UV light combined with nanotechnologies to enhance the photon effect by mean of photocatalytic nanostructures. In fact, inorganic materials, such as transition metal oxides (TiO2 NPs), are able to inactivate bacteria and viruses, generating oxygen-based radicals upon irradiation (Tayade et al, 2006;Mura et al, 2011b). These nanomaterials are not consumed during the process, as in the previous methods, and are, therefore, considered green technology for water disinfection.…”

Section: Nanotechnologies For Water Purificationmentioning

confidence: 99%

Advances of nanotechnology in agro-environmental studies

et al. 2013

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With the increase in the world population and the demand for food, new agricultural practices have been developed to improve food production through the use of more effective pesticides and fertilisers. These technologies can lead to an uncontrolled release of undesired substances into the environment, with the potential to contaminate soil and groundwater. Today, nanotechnology represents a promising approach to improve agricultural production and remediate polluted sites. This paper reviews the recent applications of nanotechnologies in agro-environmental studies with particular attention to the fate of nanomaterials once introduced in water and soil, to the advantages of their use and their possible toxicology. Findings show that the use of nanomaterials can improve the quality of the environment and help detect and remediate polluted sites. Only a small number of nanomaterials demonstrated potential toxic effects. These are discussed in detail.

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Transition Metal Ion Impregnated Mesoporous TiO₂ for Photocatalytic Degradation of Organic Contaminants in Water

Cited by 175 publications

References 41 publications

Mesoporous titania photocatalysts: preparation, characterization and reaction mechanisms

Mesoporous titania photocatalysts: preparation, characterization and reaction mechanisms

Study on identification of leather industry wastewater constituents and its photocatalytic treatment

Advances of nanotechnology in agro-environmental studies

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Transition Metal Ion Impregnated Mesoporous TiO2 for Photocatalytic Degradation of Organic Contaminants in Water

Cited by 175 publications

References 41 publications

Mesoporous titania photocatalysts: preparation, characterization and reaction mechanisms

Mesoporous titania photocatalysts: preparation, characterization and reaction mechanisms

Study on identification of leather industry wastewater constituents and its photocatalytic treatment

Advances of nanotechnology in agro-environmental studies

Contact Info

Product

Resources

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Transition Metal Ion Impregnated Mesoporous TiO₂ for Photocatalytic Degradation of Organic Contaminants in Water