ChemInform Abstract: Enhancement of the Rate of Photocatalytic Degradation on TiO2 of 2‐ Chlorophenol, 2,7‐Dichlorodibenzodioxin, and Atrazine by Inorganic Oxidizing Species

Abstract

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Investigation of the effects of humic acid and H2O2 on the photocatalytic degradation of atrazine assisted by microwave

“…Moreover, after the adsorption of H 2 O 2 , the TiO 2 surface will be modified and chemisorption of oxygen and the adsorption of the organic compounds on TiO 2 surface were prevented [26]. In addition, TiO 2 could even catalyze the conversion of H 2 O 2 to H 2 O and O 2 [26]. However, more detailed studies are required to uncover the mechanism of the UV/H 2 O 2 /TiO 2 processes.…”

“…The negative effect of H 2 O 2 at low dose was also observed in the chloroacetic acid case [25], which might be attributed to the subtle reaction between H 2 O 2 and TiO 2 ; electrons generated by TiO 2 could have been consumed by H 2 O 2 yielding $OH, and leading to the reduction in photodegradation efficiency. Moreover, after the adsorption of H 2 O 2 , the TiO 2 surface will be modified and chemisorption of oxygen and the adsorption of the organic compounds on TiO 2 surface were prevented [26]. In addition, TiO 2 could even catalyze the conversion of H 2 O 2 to H 2 O and O 2 [26].…”

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

“…- (Pelizzetti et al 1991). These oxidants increase the number of trapped electrons, which prevents recombination and generates oxidizing radicals, which may, in turn, enhance the photocatalytic degradation of dye.…”

Advanced Oxidation Processes (AOPs) for Removal of Pesticides from Aqueous Media

“…Nevertheless it has been well documented that, at high concentrations of H 2 O 2 , it can compete for adsorption with organic matter (Dionysios et al, 2004;Bandala et al, 2002;Sauer et al, 2002;Cornish et al, 2000). Besides hydrogen peroxide, other oxidant agents have been tested for improve photocatalytic reactions (Martin et al, 1995;Pelizzetti et al, 1991;Al-Ekabi et al, 1992;Kenneke et al, 1993). For example, peroxidisulphate (…”