Photodegradation of 2- and 3-chlorophenol in titanium dioxide aqueous suspensions

D'Oliveira, Jean Christophe; Al-Sayyed, Ghassan; Pichat, Pierre

doi:10.1021/es00077a007

Cited by 395 publications

(179 citation statements)

References 15 publications

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“…Already, many photocatalytic applications have emerged since Fujishima and Honda achieved the photolysis splitting of water in 1972 [70], which are divided into three categories: (i) remediation of contaminants, (ii) water splitting, and (iii) artificial photosynthesis. The first area reflects the environment application of photocatalysis and has been successfully used for a wide arrange of compounds [341][342][343][344][345][346][347][348] …”

Section: Photocatalytic Application Of Silver Halidesmentioning

confidence: 99%

Regulations of silver halide nanostructure and composites on photocatalysis

Fan

Han

Song

et al. 2017

Adv Compos Hybrid Mater

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The silver halides and their corresponding composites would constitute remarkable photocatalytic systems not only in energy production but also in environmental remediation. The major advantage in these silver halides system is that plasma metal Ag 0 species would be spontaneously generated by silver halides under light irradiation, which play dual roles of expanding light absorption range and charge carriers separation. In this tutorial review, the origin and development of silver halides, synthesis methods, construction of composite structures with other materials, photocatalytic applications, and various and controversial mechanisms are all exhaustively described.

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Section: Photocatalytic Application Of Silver Halidesmentioning

confidence: 99%

Regulations of silver halide nanostructure and composites on photocatalysis

Fan

Han

Song

et al. 2017

Adv Compos Hybrid Mater

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“…It has been reported that reaction quantum efficiency may vary with illumination levels (I) (10,39,40) and inversely with wavelength. For light intensities above 1 sun, the quantum efficiency can change as a function of I-'.~ to I-'.…”

Section: Discussionmentioning

confidence: 99%

Limiting quantum yield measurements for the disappearance of 1-propanol and propanal: an oxidative reaction study employing a TiO₂ based photoreactor

Lepore¹,

Pant²,

Langford³

1993

Can. J. Chem.

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Relative initial quantum yields (@A,,,) for the disappearance of I-propanol and propanal were estimated based on total light intensity entering the reaction vessels. Two types of photocatalytic reactor geometries were compared, a commercial prototype flow reactor with immobilized TiO, and a conventional reactor with TiO, dispersion. A maximum relative quantum yield, @I,,, == 1 , was extrapolated for pure propanol and propanal in both geometries. The high quantum yields were attributed to efficient competition of substrate oxidation with electron-hole recombination, at high surface coverage. Propanal was identified as the primary intermediate generated from I-propanol in both reactor systems, but yields of propanal were systematically 10 times lower than I-propanol loss, indicating that there was an effective pathway for propanal oxidation on the surface prior to desorption. The inhibition of I-propanol reaction caused by accumulation of product arises because both reactant and product compete for active sites on the photocatalyst surface. These propositions were confirmed by introducing propanal into the feed. The relative quantum yields converge to unity for pure substrates, suggesting that they are true yields. That is to say, absorption by TiOz of light entering the reactor is efficient in these geometries. GIUSEPPE P. LEPORE, BHUVAN C. PANT et COOPER H. LANGFORI). Can J . Chem. 71, 2051 (1993). En se basant sur I'intensite totale de la lumikre entrant dans les recipients reactionnels, on a tvalue les rendements quantiques relatifs initiaux (@A ,,is) de disparition du 1-propanol et du propanal. On a comparC deux types de gComCtries pour les reacteurs photocatalytiques, un prototype commercial d'un rkacteur Ccoulement avec du TiO, immobilisC et un rkacteur conventionnel avec une dispersion de TiO,. Pour chacune des geometries, on a pu extrapoler un rendement quantique relatif maximal, @I,, .= I , pour le propanol pur ainsi que pour le propanal. On attribue les valeurs Clevtes des rendements quantiques j. une compCtition efficace, a une couverture elevee de la surface, de I'oxydation du substrat avec la recombinaison electron-trou. Pour chacun des reacteurs, on a identifie le propanal comme intermkdiaire primaire genCrC par le 1-propanol, mais les rendements en propanal sont systCmatiquement 10 fois plus lents que les pertes du I-propanol; ces observations indiquent que, avant la dCsorption, il existe j. la surface une voie efficace pour I'oxydation du propanal. L'inhibition de la reaction du I-propanol avec accumulation de produits a t t C attribuCe B une competition entre le rkactif et le produit pour les sites actifs presents B la surface du photocatalyseur. Ces propositions sont confirmCes par I'introduction de propanal dans la source. La convergence des rendements quantiques relatifs vers I'unitC pour les substances pures suggkre que ces valeurs correspondent au rendement quantique vrai, c'est-a-dire que, pour ces gComCtries, I'absorption par le TiO, de la lumikre entrant dans le rCacteur est efficace.[Tr...

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“…The hydroxyl radical (like OH˚) is a highly reactive oxidizing reagent and can decompose most organic contaminants [22] [23].…”

Section: Introductionmentioning

confidence: 99%

Factors Influencing the Photocatalytic Degradation of Reactive Yellow 145 by TiO<sub>2</sub>-Coated Non-Woven Fibers

Alahiane¹,

Qourzal²,

Ouardi³

et al. 2014

AJAC

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The photocatalytic degradation of the synthetic textile dye Reactive Yellow 145 (RY 145) in aqueous solution, using TiO2 coated non-woven fibers as photocatalyst, under UV-lamp irradiation, was studied. The effects of the operational parameters such as initial dye concentration, pH, addition of oxidant hydrogen peroxide and addition of ethanol on the reaction rate were investigated. The effect of some inorganic ions such as

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Photodegradation of 2- and 3-chlorophenol in titanium dioxide aqueous suspensions

Cited by 395 publications

References 15 publications

Regulations of silver halide nanostructure and composites on photocatalysis

Regulations of silver halide nanostructure and composites on photocatalysis

Limiting quantum yield measurements for the disappearance of 1-propanol and propanal: an oxidative reaction study employing a TiO₂ based photoreactor

Factors Influencing the Photocatalytic Degradation of Reactive Yellow 145 by TiO<sub>2</sub>-Coated Non-Woven Fibers

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Photodegradation of 2- and 3-chlorophenol in titanium dioxide aqueous suspensions

Cited by 395 publications

References 15 publications

Regulations of silver halide nanostructure and composites on photocatalysis

Regulations of silver halide nanostructure and composites on photocatalysis

Limiting quantum yield measurements for the disappearance of 1-propanol and propanal: an oxidative reaction study employing a TiO2 based photoreactor

Factors Influencing the Photocatalytic Degradation of Reactive Yellow 145 by TiO&lt;sub&gt;2&lt;/sub&gt;-Coated Non-Woven Fibers

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Limiting quantum yield measurements for the disappearance of 1-propanol and propanal: an oxidative reaction study employing a TiO₂ based photoreactor

Factors Influencing the Photocatalytic Degradation of Reactive Yellow 145 by TiO<sub>2</sub>-Coated Non-Woven Fibers