Photocatalytic decomposition of perfluorooctanoic acid by iron and niobium co-doped titanium dioxide

被引：81

作者：

Estrellan, Carl Renan ^{[1
]}

Salim, Chris ^{[1
]}

Hinode, Hirofumi ^{[1
]}

机构：

[1] Tokyo Inst Technol, Hinode Lab, Dept Int Dev Engn, Meguro Ku, Tokyo 1528550, Japan

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2010年 / 179卷 / 1-3期

关键词：

TiO2; photocatalysis; PFOA; Metal co-doping; Valence band hole reaction; PERFLUOROCARBOXYLIC ACIDS; VISIBLE-LIGHT; DEGRADATION; PFOA; OXIDATION;

D O I：

10.1016/j.jhazmat.2010.02.060

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The photocatalytic decomposition of perfluorooctanoic acid (PFOA) in aqueous solution using Fe and Nb co-doped TiO2 (Fe:Nb-TiO2) prepared by sol-gel method was investigated. The photocatalytic activity of Fe:Nb-TiO2 towards PFOA degradation was compared to that of pure TiO2 synthesized using the same method, and that of the commercially available TiO2 photocatalyst, Aeroxide TiO2 P25 (AO-TiO2 P25). The photocatalysts were characterized by XRD, DRS, BET-N-2 adsorption isotherm, and SEM-EDX techniques and the data were correlated to the photocatalytic activity. Fe:Nb-TiO2 showed the highest activity compared to the undoped TiO2 and the commercially available TiO2. Such activity was attributable to the effects of co-doping both on the physico-chemical properties and surface interfacial charge transfer mechanisms. Perfluorocarboxylic acids (PFCAs) with shorter carbon chain length and fluoride ions were identified as photocatalytic reaction intermediates and products. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：79 / 83

页数：5

共 23 条

[1] Charge carrier dynamics at TiO2 particles: Reactivity of free and trapped holes [J].

Bahnemann, DW ;

Hilgendorff, M ;

Memming, R .

JOURNAL OF PHYSICAL CHEMISTRY B, 1997, 101 (21) :4265-4275

[2]

Di Paola A, 2001, INT J PHOTOENERGY, V3

[3] Light-induced degradation of perfluorocarboxylic acids in the presence of titanium dioxide [J].

Dillert, Ralf ;

Bahnemann, Detlef ;

Hidaka, Hisao .

CHEMOSPHERE, 2007, 67 (04) :785-792

[4] Photocatalytic activity of sol-gel derived TiO2 co-doped with iron and niobium [J].

Estrellan, Carl Renan ;

Salim, Chris ;

Hinode, Hirofumi .

REACTION KINETICS AND CATALYSIS LETTERS, 2009, 98 (01) :187-192

[5] The pKa values of PFOA and other highly fluorinated carboxylic acids [J].

Goss, Kai-Uwe .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2008, 42 (02) :456-458

[6] The study of Iron (III) and nitrogen co-doped mesoporous TiO2 photocatalysts: synthesis, characterization and activity [J].

Hao, Hongyuan ;

Zhang, Jinlong .

MICROPOROUS AND MESOPOROUS MATERIALS, 2009, 121 (1-3) :52-57

[7] Perfluorooctanoic acid: Relationship between repeated inhalation exposures and plasma PFOA concentration in the rat [J].

Hinderliter, P. M. ;

DeLorme, M. P. ;

Kennedy, G. L. .

TOXICOLOGY, 2006, 222 (1-2) :80-85

[8] Decomposition of nonafluoropentanoic acid by heteropolyacid photocatalyst H3PW12O40 in aqueous solution [J].

Hori, H ;

Hayakawa, E ;

Koike, K ;

Einaga, H ;

Ibusuki, T .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2004, 211 (1-2) :35-41

[9] Photoluminescence from terbium doped silica-titania prepared by a sol-gel method [J].

Ismail, Adel Ali ;

Abboudi, Mostafa ;

Holloway, Paul ;

El-Shall, Hassan .

MATERIALS RESEARCH BULLETIN, 2007, 42 (01) :137-142

[10] Rate constants for aqueous-phase reactions of SO4- with C2F5C(O)O- and C3F7C(O)O- at 298 K [J].

Kutsuna, Shuzo ;

Hori, Hisao .

INTERNATIONAL JOURNAL OF CHEMICAL KINETICS, 2007, 39 (05) :276-288

← 1 2 3 →