The influence of dissolved metal ions on the photocatalytic degradation of phenol in aqueous TiO2 suspensions

Brezová, Vlasta; Blažková, Alžbeta; Borošová, Eva; Čeppan, Michal; Fiala, Radim

doi:10.1016/1381-1169(95)00013-5

Cited by 105 publications

(53 citation statements)

References 25 publications

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“…However, higher concentrations of ferrous ion reduced the decomposition rate significantly. A similar trend was observed with other multivalent metals influencing PCO of phenol and sucrose [7,8]. Our previous studies [9] showed the positive † E-mail: Sergei.Preis@lut.fi role of ferrous ions at low concentrations in the efficiency of PCO of methyl tert -butyl ether (MTBE), although the PCO experiments with 2-EE, carried out in the same range of concentrations of Fe 2+ , indicated only a negative effect of iron ions.…”

Section: Introductionsupporting

confidence: 55%

The influence of ferrous ions on the efficiency of aqueous photocatalytic oxidation of 2‐ethoxy ethanol

Klauson

Preis

2005

International Journal of Photoenergy

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Abstract. The complex influence of ferrous ions on the efficiency of aqueous photocatalytic oxidation (PCO) of 2-ethoxyethanol (2-EE) was examined. A drastic efficiency increase at lower concentrations of ferrous ions was observed to change to a sharp decrease at higher concentrations. An explanation was proposed for the observed phenomena based on the low sensitivity of the pollutant towards radical-oxidation reactions and the competitive adsorption of metallic ions and 2-EE on the TiO 2 surface.

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Section: Introductionsupporting

confidence: 55%

The influence of ferrous ions on the efficiency of aqueous photocatalytic oxidation of 2‐ethoxy ethanol

Klauson

Preis

2005

International Journal of Photoenergy

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“…The data in Table 1 show that the presence of copper ions significantly reduces the degradation of the There are two possible reasons for the significant reduction in the degradation of phenol and 4-chlorophenol in the presence of copper ions, namely metal -organic complex formation and reduction and oxidation of Cu(II) arising from reactions at photogenerated electrons and holes (Brezová et al, 1995). The results in Fig.…”

Section: Effect Of Copper Ionsmentioning

confidence: 53%

“…The methods of phenol mineralization considered in the present work are photolytic oxidation and anodic oxidation in the presence and absence of titanium dioxide as a catalyst and hydrogen peroxide as a chemical oxidant. There have been reports (Brezová et al, 1995;Yawalkar et al, 2001;Esplugas et al, 2002) on the comparison of different advanced oxidation processes for phenols, the effects of the presence of metal contaminants on the efficiencies of some of these processes and here the effects of the presence of copper ions on phenols destruction are reported.…”

Section: Introductionmentioning

confidence: 99%

A combined photolytic–electrolytic system for the simultaneous recovery of copper and degradation of phenol or 4-chlorophenol in mixed solutions

Chaudhary

Grimes

2008

Chemosphere

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The effects of the presence of copper on the photooxidation of phenol and 4-chlorophenol and of the presence of the phenols on the recovery of copper by electrodeposition are studied in three systems: a photolytic cell in the presence and absence of TiO 2 as a catalyst or H 2 O 2 as an oxidant; an electrolytic cell and a combined photolyticelectrolytic system. The optimum system for the simultaneous removal of copper and destruction of the phenols which overcomes the effects of copper-phenol reactions is a combined system with concentrator electrode technology incorporated into the electrolytic cell. This combined system achieves > 99% removal of copper and destruction of phenol or 4-chlorophenol in an 8 h period.

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“…It was found that addition of dissolved copper ions to TiO 2 reaction system improved significantly the rate of photocatalytic oxidation [34][35][36][37][38][39]. For example, Bard et al observed [29] that Cu 2+ ions retarded the electron-hole recombination by trapping of photogenerated electrons (Equation (2)).…”

Section: Presence Of Copper Ions In the Tio 2 Suspensionmentioning

confidence: 99%

On the Origin of Enhanced Photocatalytic Activity of Copper-Modified Titania in the Oxidative Reaction Systems

2017

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Modification of titania with copper is a promising way to enhance the photocatalytic performance of TiO 2 . The enhancement means the significant retardation of charge carriers' recombination ratio and the introduction of visible light activity. This review focuses on two main ways of performance enhancement by copper species-i.e., originated from plasmonic properties of zero-valent copper (plasmonic photocatalysis) and heterojunctions between semiconductors (titania and copper oxides). The photocatalytic performance of copper-modified titania is discussed for oxidative reaction systems due to their importance for prospective applications in environmental purification. The review consists of the correlation between copper species and corresponding variants of photocatalytic mechanisms including novel systems of cascade heterojunctions. The problem of stability of copper species on titania, and the methods of its improvement are also discussed as important factors for future applications. As a new trend in the preparation of copper-modified titania photocatalyst, the role of particle morphology (faceted particles, core-shell structures) is also described. Finally, in the conclusion section, perspectives, challenges and recommendations for future research on copper-modified titania are formulated.

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The influence of dissolved metal ions on the photocatalytic degradation of phenol in aqueous TiO2 suspensions

Cited by 105 publications

References 25 publications

The influence of ferrous ions on the efficiency of aqueous photocatalytic oxidation of 2‐ethoxy ethanol

The influence of ferrous ions on the efficiency of aqueous photocatalytic oxidation of 2‐ethoxy ethanol

A combined photolytic–electrolytic system for the simultaneous recovery of copper and degradation of phenol or 4-chlorophenol in mixed solutions

On the Origin of Enhanced Photocatalytic Activity of Copper-Modified Titania in the Oxidative Reaction Systems

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