Preparation and photocatalytic activity of lepidocrocites obtained byphotocatalytic oxidation of Fe(II) in the presence of citric acid

Chen, Rufen; Zhao, Shufan; Liu, Hui; Song, Xin; Wei, Yu

doi:10.1016/j.jphotochem.2015.07.011

Cited by 11 publications

(2 citation statements)

References 35 publications

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“…29-0713). 48–51 Moreover, the typical characteristic peaks for the δ-FeOOH phase were observed at ca. 2 θ of 40.13 and 62.89° corresponding to the (1 0 1) and (1 1 0) planes, respectively.…”

Section: Resultsmentioning

confidence: 99%

Boosted formic acid electro-oxidation on platinum nanoparticles and “mixed-valence” iron and nickel oxides

et al. 2023

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Section: Resultsmentioning

confidence: 99%

Boosted formic acid electro-oxidation on platinum nanoparticles and “mixed-valence” iron and nickel oxides

et al. 2023

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“…It is possible that at neutral pH, iron can also be forming iron (hydr)oxides such as goethite and lepidocrocite which have poor photocatalytic activity (Li et al 2007;Chen et al 2015). However, Du et al (2008) have suggested that iron (hydr)oxides in presence of fluoride can be more efficient in the production of HO • radicals enhancing their photocatalytic activity since it is possible the formation of surface Fe-F bonds which could oxidize efficiently H 2 O.…”

Section: Resultsmentioning

confidence: 99%

Photo-Fenton process at natural conditions of pH, iron, ions, and humic acids for degradation of diuron and amoxicillin

Buitrago

Sanabria

Gutiérrez‐Zapata

et al. 2019

Environ Sci Pollut Res

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Effect of ferric ions at concentrations typically found in natural waters (0.05 to 1.06 mg L −1 ) and low H 2 O 2 concentrations (between 0.5 and 17.9 mg L −1 ) on simulated sunlight-induced (300 W m −2 ) photo-Fenton degradation at initial neutral pH (7.0) of amoxicillin and diuron in Milli-Q water was studied using an rotatable central composite experimental design 2 2 with a central and two axial points. H 2 O 2 concentration was the parameter playing the key role on the degradation of both pollutants. Despite that initial pH was 7.0 in Milli-Q water, this latter decreased rapidly in the first minutes, reaching values of 3.5 and 5.0 for diuron and amoxicillin respectively after 15 min of simulated sunlight irradiation. In contrast, in presence of bicarbonate/carbonate (HCO 3), fluoride (F − ), and humic acids (HAs) at concentrations found often in surface and well waters with ferric ion and H 2 O 2 concentrations of 0.3 and 9.7 and 15.2 mg L −1 respectively, both pollutants exhibited a strong degradation keeping the circumneutral pH. Amoxicillin and diuron degradation byproducts found by HPLC/MS were compatible with HO • and/or CO 3 -• radical attack. Several photo-induced processes such as photo-Fenton (by dissolved ferric-HA complexes), heterogeneous photocatalysis (by colloidal iron), UV-B H 2 O 2 photolysis, irradiated-dissolved organic matter, and their reactions with pollutants would be the main oxidative route responsible of degradations. These findings demonstrated that it could be possible using iron concentrations often found in natural waters to oxidize via photo-Fenton processes among other events, organic pollutants at natural pH conditions.Keywords Circumneutral photo-Fenton . Diuron . Amoxicillin . H 2 O 2 photolysis . Water detoxification . Low iron amounts * Paula Osorio-Vargas

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Photoinduced synthesis of variable-sized magnetite nanoparticles and their photodegradation for orange II

et al. 2020

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Preparation and photocatalytic activity of lepidocrocites obtained byphotocatalytic oxidation of Fe(II) in the presence of citric acid

Cited by 11 publications

References 35 publications

Boosted formic acid electro-oxidation on platinum nanoparticles and “mixed-valence” iron and nickel oxides

Boosted formic acid electro-oxidation on platinum nanoparticles and “mixed-valence” iron and nickel oxides

Photo-Fenton process at natural conditions of pH, iron, ions, and humic acids for degradation of diuron and amoxicillin

Photoinduced synthesis of variable-sized magnetite nanoparticles and their photodegradation for orange II

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