On the performance of Fe and Fe,F doped Ti–Pt/PbO2 electrodes in the electrooxidation of the Blue Reactive 19 dye in simulated textile wastewater

Andrade, Leonardo S.; Ruotolo, Luís A.M.; Rocha‐Filho, Romeu C.; Bocchi, Nerilso; Biaggio, Sonia R.; Iniesta, Jesús; García-García, Vicente; Montiel, Vicente

doi:10.1016/j.chemosphere.2006.10.028

Cited by 172 publications

(90 citation statements)

References 42 publications

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“…111 In view of the high rates of oxidation of organics at some doped coatings, it is not surprising that the studies have been extended to the complete oxidation of organics and hence for the removal of TOC/COD from effluent mimics. [115][116][117][118] Johnson and coworkers 109,111,112,[114][115][116]119,120,124,127 have made detailed studies of the mechanisms for the enhancement of rates by doping. They regard oxidations at lead dioxide anodes as oxygen transfer reactions rather than electron transfer reactions and therefore stress the importance of the activation of water as adsorbed OH radicals as the key step in the oxidations.…”

Section: Doped Lead Dioxidementioning

confidence: 99%

Electrodeposited lead dioxide coatings

2011

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Lead dioxide coatings on inert substrates such as titanium and carbon now offer new opportunities for a material known for 150 years. It is now recognised that electrodeposition allows the preparation of stable coatings with different phase structures and a wide range of surface morphologies. In addition, substantial modification to the physical properties and catalytic activities of the coatings are possible through doping and the fabrication of nanostructured deposits or composites. In addition to applications as a cheap anode material in electrochemical technology, lead dioxide coatings provide unique possibilities for probing the dependence of catalytic activity on layer composition and structure (critical review, 256 references).

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Section: Doped Lead Dioxidementioning

confidence: 99%

Electrodeposited lead dioxide coatings

2011

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“…Particularly, chloride has been considered for indirect oxidation since chloride salts are usually found in wastewaters (Oliveira et al, 2001, Palmas et al, 2007. Moreover, the role of active chlorine has been intensively investigated for dye degradation (Ruotolo et al, 2007;Panizza et al, 2007;Montanaro and Petrucci, 2009). However, an important drawback of electrolysis in chloride media may be the formation of chloroderivatives of the organic compound (Polcaro et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Phenol removal from wastewaters by electrochemical oxidation using boron doped diamond (BDD) and Ti/Ti0.7Ru0.3O2 dsa® electrodes

Britto-Costa

Ruotolo

2012

Braz. J. Chem. Eng.

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-Industrial wastewater containing non-biodegradable organic pollutants consists of highly toxic effluents whose treatment is necessary due to environmental and economical restrictions. In order to treat these effluents, an electrochemical process using a dimensionally stable anode (DSA ® ) and boron-doped diamond (BDD) electrode was studied. The performance of these electrodes for COD removal from aqueous phenol solution was evaluated in the absence and presence of different chloride concentrations. The results showed that DSA ® could be successfully used to remove COD when high chloride concentration (3035 mg L -1 Cl -) and mild current density are employed (50 mA cm -2 ). On the other hand, the presence of chloride did not have the same significant effect on the COD depletion rate using BDD; however, under mild conditions (50 mA cm -2 , 0.190 m s -1 ), the addition of 607 mg L -1 Cl -improved the COD removal by approximately 52% after 8 hours of electrolysis. The effect of current density (i) and flow velocity (v) were also studied, and it was verified that they have an important role on the process performance, especially when DSA ® is used.

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“…16 Besides, the catalytic performance of the Ti/PbO 2 electrode still has room for improvement. Thus, several efforts have been devoted to further improve its performance in the electrochemical oxidation capability and stability, including inserting the middle layer, 17 doping with elements (Bi, 18 Co, 19 Fe, 20 F, 21 Ce, 22 Cu, 23 etc. ), compounds (TiO 2 , 24 fluorine resin (FR), 25 etc.)…”

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confidence: 99%

Fabrication and Characterization of a PbO₂-TiN Composite Electrode by Co-Deposition Method

Yan

2016

J. Electrochem. Soc.

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An excellent PbO 2 electrode with high electrocatalytic activity and stability was successfully fabricated by doping TiN particles through co-deposition method (marked as PbO 2 -TiN). The morphology (SEM), crystalline structure (XRD), chemical state (XPS), electrochemical performances (CV and EIS) and stability (accelerated life test) were characterized. The results showed that TiN doping could obviously improve the surface morphology of the electrode, increase the electrode current response and reduce the electrode impedance. During the electrochemical oxidation process, the PbO 2 -0.5TiN electrode showed the best performance on degradation of Acid Red G and Methylene blue (the highest removal efficiency, the lowest energy consumption and minimum Pb dissolution). The proportion of adsorbed hydroxyl oxygen for PbO 2 -0.5TiN electrode was 78.75%, which was higher than that for PbO 2 electrode (68.95%). The accelerated service lifetime of PbO 2 -0.5TiN electrode was 302 h, which was more than 3 times longer than that of PbO 2 electrode (96 h). Furthermore, a likely deactivation mechanism for lifetime enhancement of PbO 2 -0.5TiN electrode was proposed. As an attractive and promising wastewater treatment technology, electrochemical oxidation treatment (EOT) has been applied in many fields 1-4 due to its flexibility, simplicity, high efficiency, mild condition, and environmental compatibility. [5][6][7] Anode plays an important role in the electrochemical oxidation process.8 Therefore, anodes with a high catalytic activity and long service life are desired. 9,10Some of the traditional DSA electrodes, such as Ti/RuO 2 and Ti/IrO 2 with good stability exhibit little weak electrochemical oxidation ability for organics due to the low oxygen evolution potential (OEP) and the cost are high due to the noble metals 5,11 . In addition, Ti/Sb-SnO 2 has been the research focus for its high oxygen evolution potential (OEP) and strong electrochemical oxidation ability. However, the short service life of the Ti/Sb-SnO 2 affects the degradation rate of pollutants. 12,13 In contrast, Ti/PbO 2 is a more promising metal oxide electrode widely used in practice due to its low cost, ease of synthesis, high electrocatalytic activity and chemical stability 14,15 . However, the leakage of Pb element in the electrolysis process may lead to the secondary water pollution. 16 Besides, the catalytic performance of the Ti/PbO 2 electrode still has room for improvement. Thus, several efforts have been devoted to further improve its performance in the electrochemical oxidation capability and stability, including inserting the middle layer, 17 . Based on the reports above mentioned, it can be concluded that an appropriate modification can effectively improve the performances of the electrode.Titanium nitride (TiN) is a kind of novel functional materials possessing considerable excellent characteristics such as high chemical and thermal stability, good electric conductivity, corrosion resistance, wear resistance and low cost [32][33][34] . Therefor...

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On the performance of Fe and Fe,F doped Ti–Pt/PbO2 electrodes in the electrooxidation of the Blue Reactive 19 dye in simulated textile wastewater

Cited by 172 publications

References 42 publications

Electrodeposited lead dioxide coatings

Electrodeposited lead dioxide coatings

Phenol removal from wastewaters by electrochemical oxidation using boron doped diamond (BDD) and Ti/Ti0.7Ru0.3O2 dsa® electrodes

Fabrication and Characterization of a PbO₂-TiN Composite Electrode by Co-Deposition Method

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On the performance of Fe and Fe,F doped Ti–Pt/PbO2 electrodes in the electrooxidation of the Blue Reactive 19 dye in simulated textile wastewater

Cited by 172 publications

References 42 publications

Electrodeposited lead dioxide coatings

Electrodeposited lead dioxide coatings

Phenol removal from wastewaters by electrochemical oxidation using boron doped diamond (BDD) and Ti/Ti0.7Ru0.3O2 dsa® electrodes

Fabrication and Characterization of a PbO2-TiN Composite Electrode by Co-Deposition Method

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Fabrication and Characterization of a PbO₂-TiN Composite Electrode by Co-Deposition Method