Kinetics of ultrasonic degradation of phenol in the presence of TiO2 particles

Kubo, Masaki; Matsuoka, Kunihiro; Takahashi, Atsushi; Shibasaki‐Kitakawa, Naomi; Yonemoto, Toshikuni

doi:10.1016/j.ultsonch.2004.01.039

Cited by 112 publications

(42 citation statements)

References 20 publications

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“…These experiments have also shown that lower pH, high concentration of dissolved O 2 and ultrasonic power density also enhanced the phenol degradation. Kubo et al [82] examined the ultrasonically induced phenol degradation with TiO 2 in complete dark and found the phenol degradation rate to be higher in the presence the TiO 2 compared to that of sonication alone. The rate also enhanced linearly with the catalyst amount.…”

Section: Sonochemical Methodsmentioning

confidence: 99%

Sonochemical Degradation of Phenol in the Presence of Inorganic Catalytic Materials

Pankaj

Verma²

2010

Theoretical and Experimental Sonochemistry Involving Inorganic Systems

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Degradation of phenol in its aqueous solutions, using various techniques, including ultrasound, have been examined and discussed to better understand the mechanisms involved therein and the advantages as well as the disadvantages associated with the use of inorganic catalytic materials. IntroductionSonochemical degradation of organic molecules [1], employing cavitational effect is not new. Many simple [2] and complex molecules [3] from modest to very high toxicity levels, polluting the aquatic life and the environment have been successfully reduced to relatively non-toxic or lesser harmful species, if not degraded completely by the ultrasound. Although the degree of degradation and the duration of sonication varied considerably, depending upon the nature of moieties, but the sonochemical degradation undergoes either without the addition of extra chemicals or involves the minimum amounts of non-toxic chemicals such as photocatalyst TiO 2 , Fenton's reagent etc., hence can be termed as a green technology. The purpose of this article is to review the sonochemical degradation of phenol, under different experimental conditions and in the presence of several other active chemicals to understand better the mechanisms involved in all such processes.Phenol is an important chemical, from the point of its industrial and commercial applications, but is of great environmental apprehension due to its toxicity. Its chemical name is hydroxybenzene which is more acidic compared to aliphatic alcohols hence is also known as carbolic acid [4]. At ambient temperature and pressure it is a hygroscopic crystalline solid, which is colourless when pure [5] but

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Section: Sonochemical Methodsmentioning

confidence: 99%

Sonochemical Degradation of Phenol in the Presence of Inorganic Catalytic Materials

Pankaj

Verma²

2010

Theoretical and Experimental Sonochemistry Involving Inorganic Systems

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“…Kubo et al have been investigated the effects of TiO 2 particles addition on degradation of phenol [19]. The reaction rate of phenol was enhanced by TiO 2 particle addition and degradation was a pseudo-first-order reaction.…”

Section: Effect Of Particle Addition On Apparent Degradation Rate Conmentioning

confidence: 99%

“…Especially, the combination of photocatalysis and ultrasound is considered to enhance the degradation rate [4] [5]. The degradation of phenol by ultrasonic irradiation in the presence of TiO 2 particles has been investigated in complete darkness [19]. Sekiguchi and Saita have investigated the effect of Al 2 O 3 particles on the degradation of chlorobenzene in an ultrasonic field [20].…”

Section: Introductionmentioning

confidence: 99%

Effect of Particle Addition on Ultrasonic Degradation Reaction Rate

Kobayashi¹,

Shimakage²,

Honma³

et al. 2015

OJA

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The ultrasonic degradation of methylene blue at a frequency of 490 kHz was carried out in the absence and presence of TiO2 or Al2O3 particle, and the effects of amounts of particle on the enhancement of degradation rate constant estimated by assuming first-order-kinetics were investigated. The degradation reaction was enhanced by particle addition, and the apparent degradation rate constant is proportional to the increase in amount of particle. In addition, the constant of proportionality is not influenced by degraded material and ultrasonic frequency. However, particle type influences the constant of proportionality, and the value of TiO2 particle is about 6 times as large as that of Al2O3 particle.

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“…21 All these researches have made possible an invaluable understanding of cavitation and its promotion of the efficiency of hybrid technologies. 22,23 Recently, Zhao et al 17 found that ultrasound enhances electrochemical oxidation of phenol on boron-doped diamond and Pt electrodes. The enhancement by ultrasound depends on the electrode material, being much greater on boron-doped diamond than on Pt.…”

Section: Electrochemical Versus Sonoelectrochemicalmentioning

confidence: 99%