Photocatalytic oxidation and ozonation of catechol over carbon-black-modified nano-TiO2 thin films supported on Al sheet

Li, Laisheng; Zhu, Wanpeng; Zhang, Pengyi; Chen, Zhongyin; Han, Weiqing

doi:10.1016/s0043-1354(03)00269-0

Cited by 92 publications

(30 citation statements)

References 13 publications

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“…For Acid Red 1 and 2 chlorophenol, the rate constants in same order are 0.038, 1.22, and 2.89 (×10 -4 s -1 ) and 0.59, 0.88, and 1.58(×10 -4 s -1 ), respectively. Li et al (2003) reported that the degradation rate constants of reactive Brilliant Red X-3B using TiO 2 / UV/O 3 system is shown to be 2.56-3.2 times higher in comparison to the maximal rate constants of TiO 2 /UV/ O 2 , 4.68-9.8 times of maximal rate constants with TiO 2 /UV. For the degradation of catechol, the order of removal efficiency was demonstrated to be O 3 >UV/TiO 2 / O 3 >UV/TiO 2 /O 2 >UV/TiO 2 .…”

Section: Combined Approachmentioning

confidence: 99%

“…The decrease was faster in the case of Fe 3+ and Co 2+ dopants and slower in the case of Cr 3+ . Li et al (2003) indicated that the photocatalytic activity of Carbon-Black-modified nano-TiO 2 (CB-TiO 2 ) thin films was 1.5 times higher than that of TiO 2 thin films in degrading Reactive Brilliant Red X-3B. Tian et al (2009) studied the photocatalytic activity of V doped-TiO 2 for the degradation of MB and 2, 4-dichlorophenol using UV and visible light.…”

Section: Doping and Mixed Semiconductormentioning

confidence: 99%

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Advances in Heterogeneous Photocatalytic Degradation of Phenols and Dyes in Wastewater: A Review

Ahmed

Rasul

Martens

et al. 2010

Water Air Soil Pollut

348

135

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The heterogeneous photocatalytic water purification process has gained wide attention due to its effectiveness in degrading and mineralizing the recalcitrant organic compounds as well as the possibility of utilizing the solar UV and visible light spectrum. This paper aims to review and summarize the recently published works in the field of photocatalytic oxidation of toxic organic compounds such as phenols and dyes, predominant in wastewater effluent. In this review, the effects of various operating parameters on the photocatalytic degradation of phenols and dyes are presented. Recent findings suggested that different parameters, such as type of photocatalyst and composition, light intensity, initial substrate concentration, amount of catalyst, pH of the reaction medium, ionic components in water, solvent types, oxidizing agents/ electron acceptors, mode of catalyst application, and calcinations temperature can play an important role on the photocatalytic degradation of organic compounds in water environment. Extensive research has focused on the enhancement of photocatalysis by modification of TiO 2 employing metal, non-metal, and ion doping. Recent advances in TiO 2 photocatalysis for the degradation of various phenols and dyes are also highlighted in this review.

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Section: Combined Approachmentioning

confidence: 99%

Section: Doping and Mixed Semiconductormentioning

confidence: 99%

Advances in Heterogeneous Photocatalytic Degradation of Phenols and Dyes in Wastewater: A Review

Ahmed

Rasul

Martens

et al. 2010

Water Air Soil Pollut

348

135

View full text Add to dashboard Cite

show abstract

“…Inorganic oxidants such as O 3 have been proposed to increase the efficiency of TiO 2 /UV treatments (Wang et al 2002;Li et al 2003), H 2 O 2 (Saggioro et al 2011;Saquib et al 2008), BrO 3 - (Saquib et al 2008;Muneer and Bahnemann 2002), S 2 O 8 2- (Saquib et al 2008;Muneer and Bahnemann 2002) and ClO 4…”

Section: Effect Of Oxidizing Agentmentioning

confidence: 99%

Parameters affecting the photocatalytic degradation of dyes using TiO2: a review

2015

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Traditional chemical, physical and biological processes for treating wastewater containing textile dye have such disadvantages as high cost, high energy requirement and generation of secondary pollution during treatment process. The advanced oxidation processes technology has been attracting growing attention for the decomposition of organic dyes. Such processes are based on the light-enhanced generation of highly reactive hydroxyl radicals, which oxidize the organic matter in solution and convert it completely into water, CO 2 and inorganic compounds. In this presentation, the photocatalytic degradation of dyes in aqueous solution using TiO 2 as photocatalyst under solar and UV irradiation has been reviewed. It is observed that the degradation of dyes depends on several parameters such as pH, catalyst concentration, substrate concentration and the presence of oxidants. Reaction temperature and the intensity of light also affect the degradation of dyes. Particle size, BETsurface area and different mineral forms of TiO 2 also have influence on the degradation rate.

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“…By combining photocatalysis and ozonation, Li et al [88] demonstrated the advantages of carbon black modified nanoTiO 2 (CB-TiO 2 ) thin films supported on Al sheets for removing catechol. The combined process considerably increased the TOC removal rate, and the kinetic study showed that the rate constants of the complete mineralization of catechol with TiO 2 /UV/O 3 are about two times higher than that of UV/O 3 with the same concentration of ozone.…”

Section: Ozonationmentioning

confidence: 99%

The combination of heterogeneous photocatalysis with chemical and physical operations: A tool for improving the photoprocess performance

Augugliaro

Litter

Palmisano

et al. 2006

Journal of Photochemistry and Photobiology C: Photochemistry Re

406

178

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Heterogeneous photocatalysis is a process of great potential for pollutant abatement and waste treatment. In order to improve the overall performance of the photoprocess, heterogeneous photocatalysis is being combined with physical or chemical operations, which affect the chemical kinetics and/or the overall efficiency. This review addresses the various possibilities to couple heterogeneous photocatalysis with other technologies to photodegrade organic and inorganic pollutants dissolved in actual or synthetic aqueous effluents. These combinations increase the photoprocess efficiency by decreasing the reaction time in respect to the separated operations or they decrease the cost in respect of heterogeneous photocatalysis alone, generally in terms of light energy. Depending on the operation coupled with heterogeneous photocatalysis, two categories of combinations exist. When the coupling is with ultrasonic irradiation, photo-Fenton reaction, ozonation, or electrochemical treatment, the combination affects the photocatalytic mechanisms thus improving the efficiency of the photocatalytic process. When the coupling is with biological treatment, membrane reactor, membrane photoreactor, or physical adsorption, the combination does not affect the photocatalytic mechanisms but it improves the efficiency of the overall process. The choice of the coupling is related to the type of wastewater to be treated. A synergistic effect, giving rise to an improvement of the efficiency of the photocatalytic process, has been reported in the literature for many cases.

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Photocatalytic oxidation and ozonation of catechol over carbon-black-modified nano-TiO2 thin films supported on Al sheet

Cited by 92 publications

References 13 publications

Advances in Heterogeneous Photocatalytic Degradation of Phenols and Dyes in Wastewater: A Review

Advances in Heterogeneous Photocatalytic Degradation of Phenols and Dyes in Wastewater: A Review

Parameters affecting the photocatalytic degradation of dyes using TiO2: a review

The combination of heterogeneous photocatalysis with chemical and physical operations: A tool for improving the photoprocess performance

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