Comparison of the efficiency of immobilized and suspended systems in photocatalytic degradation

被引：124

作者：

Dijkstra, MFJ ^{[1
]}

Michorius, A ^{[1
]}

Buwalda, H ^{[1
]}

Panneman, HJ ^{[1
]}

Winkelman, JGM ^{[1
]}

Beenackers, AACM ^{[1
]}

机构：

[1] Univ Groningen, Dept Chem Engn, NL-9747 AG Groningen, Netherlands

来源：

CATALYSIS TODAY | 2001年 / 66卷 / 2-4期

关键词：

photocatalysis; water purification; quantum yield;

D O I：

10.1016/S0920-5861(01)00257-7

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The photocatalytic degradation of formic acid in suspended and immobilized systems, with and without oxygen addition, are compared. In the immobilized system, oxygen addition to the reactor appeared to increase the efficiency, not only because oxygen acts as an efficient electron scavenger, but also due to increased transfer in this two-phase reactor. This immobilized system had an efficiency comparable to that of the suspended system. The addition of oxy :en to the immobilized system appeared to increase the quantum yield with a factor 4, whereas the addition of oxygen to the suspended system hardly had any effect. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：487 / 494

页数：8

共 15 条

[1] CONTINUOUS PHOTOCATALYTIC TREATMENT OF MERCURY(II) ON TITANIA POWDERS - KINETICS AND CATALYST ACTIVITY [J].

AGUADO, MA ;

CERVERAMARCH, S ;

GIMENEZ, J .

CHEMICAL ENGINEERING SCIENCE, 1995, 50 (10) :1561-1569

[2]

[Anonymous], 1996, PHOTODEGRADATION WAT

[3] ENVIRONMENTAL APPLICATIONS OF SEMICONDUCTOR PHOTOCATALYSIS [J].

HOFFMANN, MR ;

MARTIN, ST ;

CHOI, WY ;

BAHNEMANN, DW .

CHEMICAL REVIEWS, 1995, 95 (01) :69-96

[4] ELECTRON-PARAMAGNETIC-RES OBSERVATION OF TRAPPED ELECTRONS IN COLLOIDAL TIO2 [J].

HOWE, RF ;

GRATZEL, M .

JOURNAL OF PHYSICAL CHEMISTRY, 1985, 89 (21) :4495-4499

[5] PHOTOCHEMICAL PROCESSES FOR WATER-TREATMENT [J].

LEGRINI, O ;

OLIVEROS, E ;

BRAUN, AM .

CHEMICAL REVIEWS, 1993, 93 (02) :671-698

[6] PHOTOCATALYTIC OXIDATION OF ORGANIC CONTAMINANTS IN WATER - AN AID TO ENVIRONMENTAL PRESERVATION [J].

MATTHEWS, RW .

PURE AND APPLIED CHEMISTRY, 1992, 64 (09) :1285-1290

[7] An overview of semiconductor photocatalysis [J].

Mills, A ;

LeHunte, S .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 1997, 108 (01) :1-35

[8]

Murov S. L., 1973, HDB PHOTOCHEMISTRY, P119

[9]

OLLIS D F, 1991, Environmental Science and Technology, V25, P1523

[10] HETEROGENEOUS PHOTOCATALYSIS FOR WATER-PURIFICATION - CONTAMINANT MINERALIZATION KINETICS AND ELEMENTARY REACTOR ANALYSIS [J].

OLLIS, DF ;

TURCHI, C .

ENVIRONMENTAL PROGRESS, 1990, 9 (04) :229-234

← 1 2 →