Fabrication of TiO2/Ti electrode by laser-assisted anodic oxidation and its application on photoelectrocatalytic degradation of methylene blue

被引：56

作者：

Li, Jiaqing ^{[1
]}

Zheng, Lei ^{[1
]}

Li, Luoping ^{[1
]}

Xian, Yuezhong ^{[1
]}

Jin, Litong ^{[1
]}

机构：

[1] E China Normal Univ, Dept Chem, Shanghai 200062, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2007年 / 139卷 / 01期

关键词：

TiO2/Ti electrode; photoelectrocatalysis; laser calcination; methylene blue (MB);

D O I：

10.1016/j.jhazmat.2006.06.003

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A TiO2/Ti mesh electrode by laser calcination was prepared in this article. The resulting TiO2 film was investigated by X-ray diffraction (XRD), atomic force microscopy (AFM) and electrochemical impedance spectroscopy (EIS), and it illuminated that the prepared electrode mainly consisted of anatase TiO2 nanoparticles on its surface and exhibited a superior photocatalytic activity. The photodegradation of methylene blue (MB) using the proposed electrode under different experimental conditions was investigated in terms of both UV absorbance at 664 nm and chemical oxygen demand (COD) removal. The electrical bias applied in photoelectrocatalytic (PEC) oxidation was also studied. The experimental results showed that under the optimal potential of +0.50 V (versus SCE), UV absorbance and COD removal during the photodegradation of MB by the proposed TiO2/Ti mesh electrode were 97.3% and 87.0%, respectively. Through the comparison between photocatalytic (PC) oxidation and photoelectrocatalytic (PEC) oxidation, it was found that PEC oxidation was a convenient and effective way to mineralize the organic matters and that laser-treated photoelectrode exceeded the oven-treated one. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：72 / 78

页数：7

共 26 条

[1] Evaluation of color removal and degradation of a reactive textile azo dye on nanoporous TiO2 thin-film electrodes [J].

Carneiro, PA ;

Osugi, ME ;

Sene, JJ ;

Anderson, MA ;

Zanoni, MVB .

ELECTROCHIMICA ACTA, 2004, 49 (22-23) :3807-3820

[2] Application of nano TiO2 towards polluted water treatment combined with electro-photochemical method [J].

Chen, JS ;

Liu, MC ;

Zhang, L ;

Zhang, JD ;

Jin, LT .

WATER RESEARCH, 2003, 37 (16) :3815-3820

[3] Photoelectrocatalytic and photocatalytic disinfection of E-coli suspensions by titanium dioxide [J].

Christensen, PA ;

Curtis, TP ;

Egerton, TA ;

Kosa, SAM ;

Tinlin, JR .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2003, 41 (04) :371-386

[4] Photocatalytic behaviour of sulphated TiO2 for phenol degradation [J].

Colón, G ;

Hidalgo, MC ;

Navío, JA .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2003, 45 (01) :39-50

[5]

COOPER P, 1993, J SOC DYERS COLOUR, V109, P97

[6] Preparation and characterization of TiO2 photocatalysts supported on various rigid supports (glass, quartz and stainless steel). Comparative studies of photocatalytic activity in water purification [J].

Fernandez, A ;

Lassaletta, G ;

Jimenez, VM ;

Justo, A ;

GonzalezElipe, AR ;

Herrmann, JM ;

Tahiri, H ;

AitIchou, Y .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1995, 7 (1-2) :49-63

[7] Photochemical and photocatalytic degradation of an indigoid dye: a case study of acid blue 74 (AB74) [J].

Galindo, C ;

Jacques, P ;

Kalt, A .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2001, 141 (01) :47-56

[8] PHOTOELECTROCHEMISTRY IN SEMICONDUCTOR PARTICULATE SYSTEMS .16. PHOTOPHYSICAL AND PHOTOCHEMICAL ASPECTS OF COUPLED SEMICONDUCTORS - CHARGE-TRANSFER PROCESSES IN COLLOIDAL CDS-TIO2 AND CDS-AGI SYSTEMS [J].

GOPIDAS, KR ;

BOHORQUEZ, M ;

KAMAT, PV .

JOURNAL OF PHYSICAL CHEMISTRY, 1990, 94 (16) :6435-6440

[9] Photocatalytic degradation pathway of methylene blue in water [J].

Houas, A ;

Lachheb, H ;

Ksibi, M ;

Elaloui, E ;

Guillard, C ;

Herrmann, JM .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2001, 31 (02) :145-157

[10]

Ince NH, 1997, ENVIRON TECHNOL, V18, P179

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