Photocatalytic degradation of 2-chlorophenol by Co-doped TiO2 nanoparticles

Barakat, M.A.; Schaeffer, Howard J.; Hayes, G.H.; Shah, S. İsmat

doi:10.1016/j.apcatb.2004.10.001

Cited by 303 publications

(135 citation statements)

References 41 publications

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“…Among the semiconductors that are being studied, TiO 2 is one of the most efficient photocatalyst. However, it is generally reported that method of preparation and structural parameters strongly affect the photocatalytic activity of TiO 2 for pollutant degradation [1]. In addition, the effect of dopant has a primary role in extending the light absorption and conversion capacities of TiO 2 to the visible light.…”

Section: Introductionmentioning

confidence: 99%

Comparative assessment of the efficiency of Fe-doped TiO₂prepared by two doping methods and photocatalytic degradation of phenol in domestic water suspensions

Nahar¹,

Hasegawa

Kagaya

et al. 2007

Science and Technology of Advanced Materials

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Fe-doped TiO 2 particles responding to visible light were synthesized by impregnation and calcination method using TiO 2 particle and Ti element, respectively. The optical and the chemical properties were characterized by measuring the X-ray diffraction (XRD) and UV-visible spectroscopy. The onset of absorption shifted to longer wavelengths on doping TiO 2 by the calcination process, which showed a better response as compared to the impregnation method. The photocatalytic reactivity was evaluated by the degradation of phenol with impregnated Fe-doped (0.5% w/w in Fe) and calcined Fe-doped (Fe x Ti 1Àx O 2 , x ¼ 0.005 (Fe/Ti molar ratio)) TiO 2 separately in distilled and tap water. The characterization results have confirmed the advanced possibility of correlation between photoactivity and the special property of sulfur-containing calcined Fe-doped TiO 2 . In case of the coagulation of the undoped A-I and the Fe-doped B-I, the photoactivity showed a decrease due to the presence of natural electrolytes and due to the high pH of tap water, whereas in the case of the coagulation of calcined Fe-doped TiO 2 prepared from sulfides (Fe x TiS 2 ), the photoactivity showed an increase. In this study, highest catalytic activity was found to be strongly dependent both on catalyst structure and on the type of water used.

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Section: Introductionmentioning

confidence: 99%

Comparative assessment of the efficiency of Fe-doped TiO₂prepared by two doping methods and photocatalytic degradation of phenol in domestic water suspensions

Nahar¹,

Hasegawa

Kagaya

et al. 2007

Science and Technology of Advanced Materials

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“…On the other hand, as we known, the TiO2 particles with anatase structure have a better photocatalytic activity. [40][41] However, the present results shown that the samples CTNBB and CTPPB contained both anatase and rutile structures and only sample CTIPB had a single structure anatase. However, the MB degradation of the samples CTNBB and CTPPB were better than that of CTIPB.…”

Section: Resultsmentioning

confidence: 49%

Preparation of MWCNT/TiO2 Composites by Using MWCNTs and Titanium(IV) Alkoxide Precursors in Benzene and their Photocatalytic Effect and Bactericidal Activity

Zhang²,

Chen³

2009

Bulletin of the Korean Chemical Society

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In this present paper, we prepared MWCNT/TiO2 composites by using pre-oxidized multi-walled carbon nanotubes (MWCNTs) with different titanium alkoxide precursors in benzene solvent. The composites were comprehensively characterized by BET surface area, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), energy dispersive X-ray analysis (EDX) and UV-Vis absorption spectroscopy. The photoactivity of the prepared materials, under UV irradiation, was tested using methylene blue (MB) in aqueous solution. Finally, according to the results of MB removal experiment, it can be considered that the MB degradation infect mainly caused by photocatalytic effect of TiO2. Furthermore, the bactericidal test of the composites was also determined. It was indicated that MWCNT/TiO2 composites with sunlight had greater effectiveness for B. cereus, S. aureus and E. coli than any other experimental conditions.

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“…Adsorption of 4-CP on photocatalysts surfaces was determined to be negligible except for Ni(OH) 2 /P25, which was about 5%. Nd doped TiO 2 , which is reported in the literature as the most efficient rare earth doped TiO 2 photocatalysts [32,33], was also tested for degradation of 4-CP under similar circumstances. The reaction rate was very close to that of TiO 2 nanofibers, but considering its poor performance on degradation of FA no more experiments were performed with this photocatalyst.…”

Section: Photocatalytic Degradation Of Model Pesticide 4-cp Under Uvamentioning

confidence: 99%

Application of Photocatalysts and LED Light Sources in Drinking Water Treatment

2013

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This study investigates a cross-section of TiO 2 compositions for which existing evidence suggests the prospect of improved performance compared to standard Degussa P25. In the context of a program aimed toward a 365 nm LED based photo-reactor, the question is whether a distinctly superior photocatalyst composition for drinking water treatment is now available that would shape design choices. An answer was sought by synthesizing several photocatalysts with reported high reactivity in some context in the literature, and by performing photocatalysts reactivity tests using common pollutants of water system including Natural Organic Matter (NOM) and Emerging Contaminants (ECs) from the pesticide and pharmaceutical classes. 365 nm Light Emitting Diodes (LEDs) were used as the irradiation source. Since LEDs are now available in the UV, we did not examine the TiO 2 modifications that bring band gap excitation into the region beyond 400 nm. The results suggest that the choice of the photocatalyst should be best made to fit the reactor design and photocatalyst mounting constraints such as mass transport, reactive surface, and light field. No photocatalyst composition overall, superior for all classes emerged.

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Photocatalytic degradation of 2-chlorophenol by Co-doped TiO2 nanoparticles

Cited by 303 publications

References 41 publications

Comparative assessment of the efficiency of Fe-doped TiO₂prepared by two doping methods and photocatalytic degradation of phenol in domestic water suspensions

Comparative assessment of the efficiency of Fe-doped TiO₂prepared by two doping methods and photocatalytic degradation of phenol in domestic water suspensions

Preparation of MWCNT/TiO2 Composites by Using MWCNTs and Titanium(IV) Alkoxide Precursors in Benzene and their Photocatalytic Effect and Bactericidal Activity

Application of Photocatalysts and LED Light Sources in Drinking Water Treatment

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Photocatalytic degradation of 2-chlorophenol by Co-doped TiO2 nanoparticles

Cited by 303 publications

References 41 publications

Comparative assessment of the efficiency of Fe-doped TiO2prepared by two doping methods and photocatalytic degradation of phenol in domestic water suspensions

Comparative assessment of the efficiency of Fe-doped TiO2prepared by two doping methods and photocatalytic degradation of phenol in domestic water suspensions

Preparation of MWCNT/TiO2 Composites by Using MWCNTs and Titanium(IV) Alkoxide Precursors in Benzene and their Photocatalytic Effect and Bactericidal Activity

Application of Photocatalysts and LED Light Sources in Drinking Water Treatment

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Comparative assessment of the efficiency of Fe-doped TiO₂prepared by two doping methods and photocatalytic degradation of phenol in domestic water suspensions

Comparative assessment of the efficiency of Fe-doped TiO₂prepared by two doping methods and photocatalytic degradation of phenol in domestic water suspensions