Decomposition of perfluorooctanoic acid photocatalyzed by titanium dioxide: Chemical modification of the catalyst surface induced by fluoride ions

被引：68
|
作者：
Sansotera, Maurizio [1 ,2 ,3 ]
Persico, Federico [2 ,3 ]
Pirola, Carlo [1 ,2 ]
Navarrini, Walter [2 ,3 ]
Di Michele, Alessandro [3 ,4 ]
Bianchi, Claudia L. [1 ,2 ]
机构：
[1] Univ Milan, Dipartimento Chim, I-20133 Milan, Italy
[2] Politecn Milan, Dipartimento Chim Mat & Ingn Chim Giulio Natta, I-20131 Milan, Italy
[3] Consorzio Interuniv Nazl Sci & Tecnol Mat, I-50121 Florence, Italy
[4] Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2014年 / 148卷
关键词：
Titanium dioxide; PFOA; Photocatalysis; Pollution; XPS; XRD; PERFLUOROCARBOXYLIC ACIDS; PERFLUORINATED CHEMICALS; INDIUM OXIDE; GAS-PHASE; TIO2; DEGRADATION; WATER; PFOA; ANATASE; FLUORINATION;
D O I：
10.1016/j.apcatb.2013.10.038
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The degradation of perfluorooctanoic acid (PFOA) in water was investigated both as photolysis and photocatalysis by slurry titanium dioxide. Different surfactant concentrations, the catalyst nature and concentration as well as the irradiation power of the UV lamp were evaluated. The reactions were conducted using merely the natural dissolved oxygen (DO), in order to simulate conditions of non-enriched water, as industrially feasible. The photomineralization of PFOA was monitored by total organic carbon (TOC) analysis and ionic chromatography (IC). Finally, the photocatalytic powder was analyzed at different reaction times by X-ray photoelectron spectroscopy (XPS) and by X-ray powder diffraction (XRD) technique in order to study and interpret the catalyst deactivation phenomena occurred during the treatment. (C) 2013 Elsevier B.V. All rights reserved.
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页码：29 / 35
页数：7
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