Photocatalytic degradation of caffeine: Developing solutions for emerging pollutants

Marques, Rita R.N.; Sampaio, Maria J.; Carrapiço, Pedro M.; Silva, Cláudia G.; Morales‐Torres, Sergio; Dražić, Goran; Silva, Adrián M.T.

doi:10.1016/j.cattod.2012.10.008

Cited by 95 publications

(47 citation statements)

References 37 publications

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“…In the case of photocatalysis, acidic environment is rich on hydrogen cations, which are able to bind with the hydroxyl radicals, therefore reducing the available photocatalytic active species. In consequence, efficiency of photocatalytic degradation is deteriorated in acidic environment, as the direct oxidation from h + and • OH radicals was identified as the main mechanism for the photocatalytic degradation of caffeine [31].…”

Section: Influence Of Ph In the Photocatalytic Degradation Of Caffeinementioning

confidence: 99%

“…Every 30 minutes and for a total of four hours, the solutions were transferred in a quartz cuvette to a UV-vis spectrophotometer in order to determine the contaminants' absorption. Using the calibration curves the absorption for each measurement is converted into concentration units as the pollutants' concentrations have a linear dependence over the respective characteristic absorbance peaks (273 nm for CAF [31] and 296 nm for SA [32]). The optimization of the conditions for the Calibration of the TOC analyser was achieved using potassium hydrogen phthalate, sodium carbonate and sodium hydrogen carbonate standards.…”

Section: Photocatalytic Experimentsmentioning

confidence: 99%

See 1 more Smart Citation

Photocatalytic degradation of salicylic acid and caffeine emerging contaminants using titania nanotubes

Arfanis

Adamou

Moustakas

et al. 2017

Chemical Engineering Journal

134

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Section: Influence Of Ph In the Photocatalytic Degradation Of Caffeinementioning

confidence: 99%

Section: Photocatalytic Experimentsmentioning

confidence: 99%

Photocatalytic degradation of salicylic acid and caffeine emerging contaminants using titania nanotubes

Arfanis

Adamou

Moustakas

et al. 2017

Chemical Engineering Journal

134

View full text Add to dashboard Cite

“…In order to further clarify the existence of possible reactive species in the photocatalytic degradation process of lignin on Ag 40 -AgCl/ ZnO, three corresponding effective scavengers, i.e. EDTA for h + (Marques et al, 2013), KI for Å OH, and NaN 3 for Å O 2 À (Durán et al, 2011) were added individually into the tested lignin solution during the degradation process (Supplementary Materials, Fig. S6c).…”

Section: Effect Of Holes/radicals Scavengers On Lignin Degradationmentioning

confidence: 99%

Photocatalytic degradation of lignin on synthesized Ag–AgCl/ZnO nanorods under solar light and preliminary trials for methane fermentation

Lei

Liu

et al. 2015

Bioresource Technology

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“…The CNTox-TiO 2 composite was prepared by a hydration-dehydration procedure [25]: 0.1 g of functionalized CNT and 0.5 g of TiO 2 were dispersed in 1 L of distilled water under magnetic stirring. The mixture was heated up to 353 K to evaporate most of the water.…”

Section: Catalysts Synthesismentioning

confidence: 99%

Photocatalytic production of hydrogen from methanol and saccharides using carbon nanotube-TiO2 catalysts

Silva

Sampaio

Marques

et al. 2015

Applied Catalysis B: Environmental

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102

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a b s t r a c tCarbon nanotube-titanium dioxide composite materials were produced by two routes: hydration-dehydration and one-pot oxidation. Au, Pt, Ir and Pd were loaded on TiO 2 -based materials by an incipient wetness method. The resulting materials were calcined and afterwards reduced at two distinct temperatures, 473 and 673 K. Characterization was carried out by temperature programmed desorption, infrared and UV-Vis spectroscopy, N 2 adsorption, SEM and TEM. Compared with reference TiO 2 , composite catalysts presented increased activity for photocatalytic production of H 2 from methanol solutions. The highest activity was obtained for the Pt-loaded composite produced by the one-pot synthesis method, with 485 mol of H 2 being generated after two hours of irradiation, contrasting with 205 mol of H 2 obtained using Pt/TiO 2 . This synergic effect was discussed in terms of the action of carbon nanotubes as dispersing media for TiO 2 particles as well as their action as photosensitizers. The relative efficiency of the catalysts was related to the work function of each metal and the sizes of the metal nanoparticles. H 2 generation from photocatalytic reforming of saccharides, namely arabinose, glucose, fructose and cellobiose was performed using TiO 2 and CNT-TiO 2 based catalysts. The relative efficiency of H 2 production from these biomass-derived compounds has been discussed based on their structural arrangement, H:C ratio and availability of ␣-hydrogens.

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Photocatalytic degradation of caffeine: Developing solutions for emerging pollutants

Cited by 95 publications

References 37 publications

Photocatalytic degradation of salicylic acid and caffeine emerging contaminants using titania nanotubes

Photocatalytic degradation of salicylic acid and caffeine emerging contaminants using titania nanotubes

Photocatalytic degradation of lignin on synthesized Ag–AgCl/ZnO nanorods under solar light and preliminary trials for methane fermentation

Photocatalytic production of hydrogen from methanol and saccharides using carbon nanotube-TiO2 catalysts

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