Correlation between photoelectrochemical behaviour and photoelectrocatalytic activity and scaling-up of P25-TiO2 electrodes

Pablos, Cristina; Marugán, Javier; Grieken, Rafael van; Adán, Cristina; Riquelme, Ainhoa; Palma, Jesús

doi:10.1016/j.electacta.2014.03.038

Cited by 41 publications

(22 citation statements)

References 34 publications

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“…Its industrialization is hindered by a multitude of factors, including a costly investment requirement as well as complex operating procedures [48,89,92]. Numerous kinetic parameters and models still need to be studied; however, these models are unsubstantial to date despite composing the most fundamental basis of the scale-up process in reactor engineering.…”

Section: Conclusion and Future Work For Pec Reactor Designsmentioning

confidence: 99%

“…9. It could be placed either in horizontal [72,89] or vertical forms [48,[90][91][92]. Particular advantages associated with the cylindrical configuration are the full utilization of irradiation from every direction and the reinforcement of mass transfer by using mesh electrodes and by sparging with pressured gas [48].…”

Section: Cylindrical Pec Reactor With Annular Electrodesmentioning

confidence: 99%

“…thermal TiO 2 /Ti electrode prepared by annealing a titanium foil at 700 °C for 30 min [89]). Even though it could considerably improve the photocatalytic activity for the thermal electrodes when the charge carrier separation is forced by the external potential, the major barrier to hinder the oxidation of the pollutants by thermal electrodes has been related to the lower surface area compared to the particulate electrode.…”

Section: Cylindrical Pec Reactor With Annular Electrodesmentioning

confidence: 99%

“…One major application of the reactor is water purification. Marugán et al[72] and Pablos et al[89] designed the vertical cylindrical reactor and applied it in the degradation of methanol. The results indicate that Page 16 of 61…”

mentioning

confidence: 99%

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Synergetic photoelectrocatalytic reactors for environmental remediation: A review

Meng

Zhang

2015

Journal of Photochemistry and Photobiology C: Photochemistry Re

138

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Section: Conclusion and Future Work For Pec Reactor Designsmentioning

confidence: 99%

Section: Cylindrical Pec Reactor With Annular Electrodesmentioning

confidence: 99%

Section: Cylindrical Pec Reactor With Annular Electrodesmentioning

confidence: 99%

mentioning

confidence: 99%

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Synergetic photoelectrocatalytic reactors for environmental remediation: A review

Meng

Zhang

2015

Journal of Photochemistry and Photobiology C: Photochemistry Re

138

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“…TiO 2 is most widely used in current applications because of its high catalytic activity, good resistance to photocorrosion, chemical stability, cheapness, and non-toxicity. 4,[17][18][19] Of the three crystal modifications of TiO 2 , the wide bandgap forms anatase (3.2 eV) and rutile (3.0 eV) are mainly employed in photocatalytic reactions. 20,21 However, photocatalytic materials still have problems in the marine environment.…”

mentioning

confidence: 99%

Long-Term Photoelectrochemical Cathodic Protection by Co(OH)₂-Modified TiO₂on 304 Stainless Steel in Marine Environment

Xie

Liu

Chen

et al. 2018

J. Electrochem. Soc.

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The long-term photoelectrochemical cathodic protection by Co(OH) 2 -surface modified TiO 2 of anatase nanotubes and rutile type, prepared by anodic oxidation has been studied in aqueous 3.5 wt% NaCl solution. Electrochemical measurements have been used to evaluate the photoelectrochemical protective properties of both Co(OH) 2 -modified TiO 2 coupled with 304 stainless steel in 3.5 wt% NaCl solution under illumination and in the dark. Morphologies, crystal structures, surface compositions, and light response range of both Co(OH) 2 -surface modified TiO 2 films before and after immersion were characterized, respectively, by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-Vis spectrophotometry. The results show that the photogenerated electrode potential of both types of TiO 2 films modified with Co(OH) 2 is more negative affording protection of 304 stainless steel than that of the non-modified TiO 2 under illumination. These TiO 2 films provide a long period (12 h) of protection. The anatase-TiO 2 nanotube film always shows a better protection performance than rutile-TiO 2 film. In recent years, photocatalysis has been broadly used in solar cells, for degradation of pollutants, splitting of water, air purification, and corrosion protection of metals.1-3 The latter application has attracted our attention because of its environmental advantages.In 1990s, Tsujikawa and Yuan 4 first proposed the method of photoelectrochemical cathodic protection of metals by photocatalytic materials. They reported the more negative corrosion potential of TiO 2 -coated 304 stainless steel or carbon steel under UV irradiation than that of bare steel. The TiO 2 coating plays the role of providing electrons like a sacrificial anode in cathodic protection. Subsequently, Fujishima et al.5 studied the mechanism of the photoelectrochemical cathodic protection of TiO 2 -WO 3 in 3 wt% NaCl solution with pH = 5. So far, TiO 2 -protection of metals using sunlight has been a focus of great attention as a possible means for converting solar energy to electrical energy by generating the required negative electrode potential. Photoelectrochemical cathodic protection has become an active research field of metal corrosion protection. It has attracted numerous studies and yielded new technologies. [6][7][8][9][10][11][12][13] Many metal oxides and sulfides, such as TiO 2 , 4,9 ZnO, 14 SnO 2 15 and CdS, 16 have been investigated as common photocatalyst materials. TiO 2 is most widely used in current applications because of its high catalytic activity, good resistance to photocorrosion, chemical stability, cheapness, and non-toxicity. 4,[17][18][19] Of the three crystal modifications of TiO 2 , the wide bandgap forms anatase (3.2 eV) and rutile (3.0 eV) are mainly employed in photocatalytic reactions. 20,21 However, photocatalytic materials still have problems in the marine environment. Corrosion is a gradual and long-term destruction of materials. Therefore...

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Synthesis, Characterization, and Photonic Efficiency of Novel Photocatalytic Niobium Oxide Materials

et al. 2017

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The application of niobium oxides as photocatalytic materials for the removal of contaminants is scarcely reported in the literature. This work reports the methodology to synthesize four different mesoporous niobium oxide materials and the correlation between the physicochemical properties and the photocatalytic activity. X‐ray diffraction, UV–vis diffuse reflectance spectra (DRS), transmission electron microscopy, and nitrogen adsorption techniques are used to characterize the structure and composition of the obtained materials. The photocatalytic oxidation of methanol is used as reaction test to assess the photocatalytic activities and photonic efficiencies of the materials as a function of the catalyst concentration. Nb 2 O 5 materials display lower reaction rates, which can be attributed to the relatively high average particle size. By contrast, NaNbO 3 materials show higher activity, especially for high catalyst loading. No significant differences in absorption and scattering of light are observed among the materials, indicating that the higher photonic efficiency of NaNbO 3 should be the result of a lower charge recombination derived from its microstructure, sodium composition, low particle size, and high specific surface area of these materials.

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Correlation between photoelectrochemical behaviour and photoelectrocatalytic activity and scaling-up of P25-TiO2 electrodes

Cited by 41 publications

References 34 publications

Synergetic photoelectrocatalytic reactors for environmental remediation: A review

Synergetic photoelectrocatalytic reactors for environmental remediation: A review

Long-Term Photoelectrochemical Cathodic Protection by Co(OH)₂-Modified TiO₂on 304 Stainless Steel in Marine Environment

Synthesis, Characterization, and Photonic Efficiency of Novel Photocatalytic Niobium Oxide Materials

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Correlation between photoelectrochemical behaviour and photoelectrocatalytic activity and scaling-up of P25-TiO2 electrodes

Cited by 41 publications

References 34 publications

Synergetic photoelectrocatalytic reactors for environmental remediation: A review

Synergetic photoelectrocatalytic reactors for environmental remediation: A review

Long-Term Photoelectrochemical Cathodic Protection by Co(OH)2-Modified TiO2on 304 Stainless Steel in Marine Environment

Synthesis, Characterization, and Photonic Efficiency of Novel Photocatalytic Niobium Oxide Materials

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Long-Term Photoelectrochemical Cathodic Protection by Co(OH)₂-Modified TiO₂on 304 Stainless Steel in Marine Environment