Study of the phenol photocatalytic degradation over TiO2 modified by sulfation, fluorination, and platinum nanoparticles photodeposition

Murcia, Julie J.; Hidalgo, M.C.; Navı́o, J.A.; Araña, J.; Doña-Rodrı́guez, J.M.

doi:10.1016/j.apcatb.2015.05.040

Cited by 69 publications

(43 citation statements)

References 30 publications

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“…The key experimental parameters used in the present work and some characterization results are reported in Table 1. As it can be observed in this table, the specific surface area of lab prepared TiO 2 significantly increases after fluorination, this is because fluorine ions protect Anatase phase against the Rutile phase formation sintering, preserving the surface area during the calcination at 650 • C [21]. After Pt deposition the S BET of lab prepared and commercial TiO 2 slightly decreases, this is probably due to pore blocking by Pt particles on Titania surface.…”

Section: Photocatalysts Characterization Resultsmentioning

confidence: 69%

“…Figure 1 shows the XRD patterns obtained for all the photocatalysts analyzed, as it can be observed lab prepared TiO 2 presents both, Anatase and Rutile phases (ratio of 90:10), after fluorination and platinization only Anatase phase was observed in the solids. This is mainly due to the protective effect of the fluorination over Titania surface, as it was previously mentioned, this pretreatment inhibits the formation of the Rutile phase during the calcination process [21,22]. The use of fluorine as a morphology controlling agent has been extensively reported in scientific literature, in general, during the fluorination of TiO2 surface a substitution reaction takes place, in this reaction the hydroxyl groups (Titanol groups) can be replaced by Fluoride ions, as it was reported by Torrents et al [27], each fluorine substituted/adsorbed occupy 0.33 nm 2 on the TiO2 surface (i.e.…”

Section: Photocatalysts Characterization Resultsmentioning

confidence: 91%

“…As TiO 2 is the most recognized and employed material in photocatalysis, many efforts have been devoted to improve its effectiveness; thus, noble metal addition [11,18], non-metals doping [19,20], sulfation and fluorination [4,[21][22][23][24][25][26][27][28][29][30] among others have been reported to be suitable alternatives for titania modification. Taking into account that the practical application of TiO 2 is not in the form of dispersions, many studies in this area have been also focused on supported TiO 2 being photolyzed in the presence of a pollutant during a continuous cleaning process [14,16,28,31,32], in these processes the separation of the pollutant from the processed solution at the end of the process it is not necessary.…”

Section: Introductionmentioning

confidence: 99%

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Fluorinated and Platinized Titania as Effective Materials in the Photocatalytic Treatment of Dyestuffs and Stained Wastewater Coming from Handicrafts Factories

et al. 2019

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In this study, commercial and lab-prepared TiO2 were modified by fluorination and platinum photodeposition; and the effect of these modifications over the physicochemical and photocatalytic properties of TiO2 was evaluated. It was found that F and Pt addition leads to the modification of the optical and textural properties of TiO2. The materials prepared were tested in the photocatalytic degradation of different organic dyestuffs such as methylene blue (MB) and methyl orange (MO); the degradation of commercial anilines employed in the staining of natural fibers was also evaluated. Photocatalysis was also studied in this work as an eco-friendly treatment of wastewater coming from handicrafts factories. In general it was observed that the effectiveness of the photocatalytic treatment strongly depends on the substrate to be degraded, thus, fluorinated and platinized commercial Titania (Pt-F-P25) showed the best photocatalytic performance in the MB and MO photodegradation and in contrast, in the case of the anilines the highest degradation was obtained over commercial TiO2 fluorinated (F-P25). These results can be explained by differences observed in the structure and in the adsorption of these dyestuffs over the photocatalysts surfaces. F-P25 photocatalyst also demonstrated to be the best material for the treatment of real wastewater coming from handicrafts factories.

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Section: Photocatalysts Characterization Resultsmentioning

confidence: 69%

Section: Photocatalysts Characterization Resultsmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Fluorinated and Platinized Titania as Effective Materials in the Photocatalytic Treatment of Dyestuffs and Stained Wastewater Coming from Handicrafts Factories

et al. 2019

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“…However, the method often shows a low retention of many organic micropollutants and suffers from severe fouling problems. By contrast, considerable efforts have been focused on the design of TiO 2 -based photocatalysts for the removal of phenolic compounds [7,8] due to their powerful oxidizing ability, chemical stability, and low cost [9][10][11]. For example, Makrigianni et al [12] confirmed that pure TiO 2 could only remove 65% of phenol within five hours under simulated natural sunlight irradiation.…”

Section: Introductionmentioning

confidence: 99%

Hierarchically-Structured TiO2/MnO2 Hollow Spheres Exhibiting the Complete Mineralization of Phenol

Jiang

Chen

et al. 2019

Catalysts

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Although TiO2 or MnO2-based materials have been widely used for the degradation of phenolic compounds, complete mineralization is still a challenge, especially for TiO2-based materials. Here, we devise a hierarchically-structured TiO2/MnO2 (HTM) hollow sphere, in which hollow TiO2 acts as a skeleton for the deposition of MnO2 in order to prevent the aggregation of MnO2 nanoparticles and to maintain its hollow structure. During the oxidation reaction, the as-synthesized HTM can fully exert their respective advantages of the TiO2 and MnO2 species to realize the first stage of the rapid oxidation degradation of phenol and the second stage of the complete photo-mineralization of residual phenol and its intermediates, which efficiently overcomes the incomplete mineralization of phenolic compounds. The degradation mechanism and pathway of phenol are also proposed according to the analysis of Mass Spectrometry (MS). Therefore, this work provides a new insight for exploring hierarchically-structured materials with two or more species.

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“…The traditional chemical method always causes seriously secondary pollution. Recently, advanced oxidation processes (AOPs), which combining chemical and advanced material technologies are rapidly developed, such as A C C E P T E D M A N U S C R I P T 4 ozone (O 3 ) oxidation [20], Fenton/Fenton-like process [21][22][23], and photocatalysis [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Fe73.5Si13.5B9Cu1Nb3 metallic glass: Rapid activation of peroxymonosulfate towards ultrafast Eosin Y degradation

et al. 2018

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L. (2018). Fe73.5Si13.5B9Cu1Nb3 metallic glass: Rapid activation of peroxymonosulfate towards ultrafast Eosin Y degradation. AbstractDiscovering functional applications of metallic glasses (MGs) as heterogeneous catalysts is a fundamental and essential topic. This work reports the rapid production of sulfate radicals (SO 4 • − ) from peroxymonosulfate (PMS) using Fe 73.5 Si 13.5 B 9 Cu 1 Nb 3 glassy ribbons as catalysts for Eosin Y (EY) dye wastewater treatment. The reaction rates (k) from the experimental data reveal that the EY degradation is well fitted with the pseudo-first-order kinetic model. The strong electron transfer ability is characterized by electrochemical methods, presenting an advanced catalytic performance for EY degradation. Various experimental parameters, including dye concentration, catalyst dosage, PMS concentration, light intensity, pH and reaction temperature as well as the saline and natural inorganic effects, are fully investigated. The results show that the color removal of EY dye could achieve nearly 100% within 20 min. The quenching experiments are performed to verify the production of reactive species, suggesting that both •OH and SO 4 • − are produced from PMS that play significant roles for EY degradation. This critical study reveals that using Fe 73.5 Si 13.5 B 9 Cu 1 Nb 3 MGs as catalysts exhibit a superior reactivity on PMS activation in wastewater treatment. The discoveries shed lights into the study of electron transfer ability for MGs, presenting extensive prospects in the application of dye wastewater treatment.

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Study of the phenol photocatalytic degradation over TiO2 modified by sulfation, fluorination, and platinum nanoparticles photodeposition

Cited by 69 publications

References 30 publications

Fluorinated and Platinized Titania as Effective Materials in the Photocatalytic Treatment of Dyestuffs and Stained Wastewater Coming from Handicrafts Factories

Fluorinated and Platinized Titania as Effective Materials in the Photocatalytic Treatment of Dyestuffs and Stained Wastewater Coming from Handicrafts Factories

Hierarchically-Structured TiO2/MnO2 Hollow Spheres Exhibiting the Complete Mineralization of Phenol

Fe73.5Si13.5B9Cu1Nb3 metallic glass: Rapid activation of peroxymonosulfate towards ultrafast Eosin Y degradation

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