Photocatalytic ozonation of dibutyl phthalate over TiO2 film

被引：80

作者：

Li, LS ^{[1
]}

Zhu, WP ^{[1
]}

Chen, L ^{[1
]}

Zhang, PY ^{[1
]}

Chen, ZY ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Environm Sci & Engn, Beijing 100084, Peoples R China

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2005年 / 175卷 / 2-3期

基金：

中国国家自然科学基金;

关键词：

TiO2; film; dibutyl phthalate; photocatalytic ozonation; TOC removal; mineralization rate constants;

D O I：

10.1016/j.jphotochem.2005.01.020

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：

A novel carbon black modified nano-TiO2 film photocatalyst (CB-TiO2) was prepared by a sol-gel method and used for degrading and mineralizing dibutyl phthalate. The film was characterized by XRD, SEM, and DRS techniques. Carbon black modification could make TiO2 film more pores, looser structure, smaller crystal sizes and longer excitation wavelength. The photocatalytic activity of the CB-TiO2 films was 1.4 times higher than that of TiO2 films in degrading dibutyl phthalate. The results showed that ozone concentrations had an important effect on degradation and mineralization of dibutyl phthalate. The combined photocatalysis with UV irradiation and ozonation (TiO2/UV/O-3) process considerably improved mineralization and degradation of dibutyl phthalate compared to combined photocatalysis with UV irradiation (TiO2/UV) process, combined ozonation with UV irradiation (UV/O-3) process and ozonation alone (O-3) process. Dibutyl phthalate can be quickly mineralized in TiO2/UV/O-3 and UV/O-3, its mineralization followed pseudo-zero-order kinetics dependent upon ozone concentration and indicated its concentration did not affect the kinetics during TiO2/UV, UV/O-3 and TiO2/UV/O-3 processes. The kinetic study showed the mineralization rate constants of dibutyl phthalate with TiO2/UV/O-3 are 1.2-1.8 times higher than that of UV/O-3 with the same ozone concentration and 3.5 times higher than that of TiO2/UV. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：172 / 177

页数：6

共 26 条

[1]

AKAWAT S, 1999, CATAL TODAY, V54, P159

[2] Checking for model consistency in optimal fingerprinting [J].

Allen, MR ;

Tett, SFB .

CLIMATE DYNAMICS, 1999, 15 (06) :419-434

[3] Degradation of dibutyl phthalate by homogeneous photocatalysis with Fe(III) in aqueous solution [J].

Bajt, O ;

Mailhot, G ;

Bolte, M .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2001, 33 (03) :239-248

[4]

CHEN ZY, 2001, CHINESE SCI BULL, V46, P1961

[5]

DANIEL RS, 1984, ENVIRON SCI TECHNOL, V18, P93

[6]

de Moraes SG, 2000, CHEMOSPHERE, V40, P369

[7]

Dean P.O., 1985, APPL ENVIRON MICROB, V49, P443

[8] Experimental comparison of three reactor designs for photocatalytic water purification [J].

Dijkstra, MFJ ;

Buwalda, H ;

de Jong, AWF ;

Michorius, A ;

Winkelman, JGM ;

Beenackers, AACM .

CHEMICAL ENGINEERING SCIENCE, 2001, 56 (02) :547-555

[9] TiO2-catalysed ozonation of raw Ebro river water [J].

Gracia, R ;

Cortes, S ;

Sarasa, J ;

Ormad, P ;

Ovelleiro, JL .

WATER RESEARCH, 2000, 34 (05) :1525-1532

[10]

Klare M, 1999, CHEMOSPHERE, V38, P2013

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