Comparative photocatalytic studies of degradation of a cationic and an anionic dye

被引：82

作者：

Hasnat, MA ^{[1
]}

Siddiquey, IA ^{[1
]}

Nuruddin, A ^{[1
]}

机构：

[1] Shahjalal Univ Sci & Technol, Dept Chem, Sylhet 3114, Bangladesh

来源：

DYES AND PIGMENTS | 2005年 / 66卷 / 03期

关键词：

cationic and anionic dyes; photo-irradiation; adsorption isotherm;

D O I：

10.1016/j.dyepig.2004.09.020

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Photocatalytic degradation of Methylene Blue, a cationic dye and Procion Red, an anionic dye, has been examined in TiO2 dispersions under visible light (lambda 400-580 nm). Adsorption is a prerequisite for the TiO2 assisted photodegradation and the extent of degradation has been discussed in terms of the Langmuir-Hinshelwood model. Like most semiconductors the photocatalytic nature of TiO2 is pH dependent because of its amphoteric nature. It has been found that pH similar to 9.5 and pH similar to 3.22 were suitable for Methylene Blue and Procion Red, respectively. The degradation pathway of Procion Red was found to be somewhat different from Methylene Blue. (c) 2004 Elsevier Ltd. All rights reserved.

引用

页码：185 / 188

页数：4

共 14 条

[1] FACTORS INFLUENCING EFFICIENCIES OF TIO2-SENSITIZED PHOTODEGRADATION .1. SUBSTITUTED BENZOIC-ACIDS - DISCREPANCIES WITH DARK-ADSORPTION PARAMETERS [J].

CUNNINGHAM, J ;

ALSAYYED, G .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1990, 86 (23) :3935-3941

[2]

Hasnat MA, 2003, INDIAN J CHEM A, V42, P1865

[3] PHOTODEGRADATION OF SURFACTANTS .8. COMPARISON OF PHOTOCATALYTIC PROCESSES BETWEEN ANIONIC SODIUM DODECYLBENZENESULFONATE AND CATIONIC BENZYLDODECYLDIMETHYLAMMONIUM CHLORIDE ON THE TIO2 SURFACE [J].

HIDAKA, H ;

ZHAO, J ;

PELIZZETTI, E ;

SERPONE, N .

JOURNAL OF PHYSICAL CHEMISTRY, 1992, 96 (05) :2226-2230

[4] ULTRAFAST PHOTOCHEMICAL EVENTS ASSOCIATED WITH THE PHOTOSENSITIZATION PROPERTIES OF A SQUARAINE DYE [J].

KAMAT, PV ;

DAS, S ;

THOMAS, KG ;

GEORGE, MV .

CHEMICAL PHYSICS LETTERS, 1991, 178 (01) :75-79

[5]

MAHMOOD AJ, 2002, J BANGLADESH CHEM SO, V15, P30

[6] PHOTOMINERALIZATION OF 4-CHLOROPHENOL SENSITIZED BY TITANIUM-DIOXIDE - A STUDY OF THE INITIAL KINETICS OF CARBON-DIOXIDE PHOTOGENERATION [J].

MILLS, A ;

MORRIS, S .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 1993, 71 (01) :75-83

[7] PHOTOSENSITIZED ELECTRON INJECTION IN COLLOIDAL SEMICONDUCTORS [J].

MOSER, J ;

GRATZEL, M .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1984, 106 (22) :6557-6564

[8] Large scale development of a light-enhanced Fenton reaction by optimal experimental design [J].

Oliveros, E ;

Legrini, O ;

Hohl, M ;

Muller, T ;

Braun, AM .

WATER SCIENCE AND TECHNOLOGY, 1997, 35 (04) :223-230

[9] PHOTOCATALYTIC DEGRADATION OF ORGANIC-WATER CONTAMINANTS - MECHANISMS INVOLVING HYDROXYL RADICAL ATTACK [J].

TURCHI, CS ;

OLLIS, DF .

JOURNAL OF CATALYSIS, 1990, 122 (01) :178-192

[10] PHOTOCHEMISTRY ON SURFACES - PHOTODEGRADATION OF 1,3-DIPHENYLISOBENZOFURAN OVER METAL-OXIDE PARTICLES [J].

VINODGOPAL, K ;

KAMAT, PV .

JOURNAL OF PHYSICAL CHEMISTRY, 1992, 96 (12) :5053-5059

← 1 2 →