307-24-4Relevant articles and documents
Patton, R. H.,Simons, J. H.
, p. 2016 - 2017 (1955)
SYNTHESE D'ACIDES PERFLUOROALCANE CARBOXYLIQUE ET SULFINIQUE PAR REDUCTION ELECTROCHIMIQUE D'IODURES DE PERFLUOROALKYLE SUR CATHODE EN FIBRES DE CARBONE DANS LE SOLVANT N,N-DIMETHYLFORMAMIDE. APPLICATION A LA SYNTHESE DE PERFLUORO α,ο DIACIDES
Benefice-Malouet, Sylvie,Blancou, Hubert,Calas, Patrick,Commeyras, Auguste
, p. 125 - 140 (1988)
The electrochemical reduction of C6F13I on a carbon fibre cathode in DMF as solvent and in the presence of SO2 is studied.Depending on the water content of the solvent, perfluorohexyl sulfinic acid C6F13SO2H or perfluoropentyl carboxylic acid C5F11COOH are obtained.These reactions are applied to 1,4-diiodoperfluorobutane; by varying the composition of the solvent it has been possible to obtain the two diacidic compounds : HO2S(CF2)4SO2H and HO2S(CF2)3COOH.
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Germain,A.,Commeyras,A.
, p. 118 - 119 (1978)
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Electrocatalytic degradation of perfluorooctanoic acid by LaNixY1-xO3 (Y = Fe, Cu, Co, Sr) gas dispersion electrode
Chen, Yongyang,Guo, Dan,Dong, Xiaochun,Li, Yahui,Huang, Yixuan,Chen, Hao,Li, Shanping
, (2020/12/23)
Perfluorooctanoic acid (PFOA), as a refractory organic pollutant, seriously harms the environment and damages human health. Here, the electrocatalytic method was selected to degrade PFOA. In this work, perovskite catalysts doped with different elements, and corresponding gas diffusion electrodes (GDE) were prepared by the gel-sol method and citric acid complexation method. The crystal structure, microscopic morphology, and electrochemical properties of the LaNixY1-xO3 (Y = Fe, Cu, Co, Sr) perovskite catalyst electrode were analyzed by XRD, TEM, and CV. Moreover, the electrocatalytic performances of the as-prepared electrodes were assessed by the degradation of PFOA, and the Sr-doped GDE exhibited the highest degradation rate of PFOA. The optimum degradation conditions, such as the current density, pH, and initial concentration were also investigated. It was observed that when the current density was 20 mA/cm2, pH was 5, and initial concentration was 0.25 mmol/L, the Sr-doped GDE had the best degradation and defluorination efficiency of PFOA reached 90.0 % and 75.1 %, respectively. High performance liquid chromatography-mass spectrometry (HPLC-MS) was used to analyze the intermediate products of PFOA degradation and obtain the degradation pathway. With the combined action of [rad]OH and O2, PFOA was degraded by stepwise removal of CF2 groups, which were ultimately degraded into F? and CO2.
The effect of oxygen in the photocatalytic oxidation pathways of perfluorooctanoic acid
Sansotera, Maurizio,Persico, Federico,Rizzi, Valentina,Panzeri, Walter,Pirola, Carlo,Bianchi, Claudia L.,Mele, Andrea,Navarrini, Walter
, p. 159 - 168 (2015/11/10)
The influence of oxygen in the photocatalytic oxidation of perfluorooctanoic acid (PFOA) promoted by a commercial nano-sized titanium dioxide was studied by testing the reaction in different conditions: static air, oxygen flux, nitrogen flux and pre-saturated nitrogen flux. The reaction was monitored by Total Organic Carbon (TOC) analysis and Ionic Chromatography (IC). Shorter chain perfluorocarboxylic acids (PFCAs; Cn, n = 1-7) intermediate degradation products were quantitatively determined by High-Performance Liquid Chromatography combined with Mass Spectrometry (HPLC-MS) analysis. The presence of shorter chain PFCAs in solution was also monitored by 19F NMR. The experimental findings are in agreement with two major oxidative pathways: Cn → Cn-1 photo-redox and β-scissions routes mediated by COF2 elimination. Depending on the experimental conditions, the mutually operating mechanisms could be unbalanced up to the complete predominance of one pathway over the other. In particular, the existence of the β-scissions route with COF2 elimination was corroborated by the isolation and characterization of carbonyl difluoride, a predicted fluorinated decomposition by-product.
