Heterogeneous photocatalytic degradation of ethylene glycol and propylene glycol

被引：18

作者：

Kim, Kyung Nam ^{[1
]}

Hoffmann, Michael R. ^{[1
]}

机构：

[1] CALTECH, WM Keck Lab, Pasadena, CA 91125 USA

来源：

KOREAN JOURNAL OF CHEMICAL ENGINEERING | 2008年 / 25卷 / 01期

关键词：

ethylene glycol; metal loaded photocatalyst; oxidation; photocatalysis; photocatalytic activity; propylene glycol; TiO2;

D O I：

10.1007/s11814-008-0015-4

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The photocatalytic decomposition of ethylene glycol and propylene glycol was investigated by using UV-illuminated TiO2 and metal-loaded TiO2 catalysts. The effects of pH, initial concentration, and wavelength of light on the decomposition rate of the glycols were explored. Platinum- and palladium-loaded TiO2 catalysts enhanced the rates of photodecomposition compared to unloaded TiO2. The glycols were oxidized primarily to carbon dioxide and water. Formaldehyde was found to be an important reaction intermediate. A detailed chemical reaction mechanism for the destruction of ethylene glycol and propylene glycol in water via free radical pathway and trapped bole reactions at the particle surface is proposed.

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收藏

页码：89 / 94

页数：6

相关论文

共 19 条

[1] Photodegradation of formaldehyde by photocatalyst TiO2:: effects on the presences of NO, SO2 and VOCs [J].

Ao, CH ;

Lee, SC ;

Yu, JZ ;

Xu, JH .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2004, 54 (01) :41-50

[2] EFFICIENT PHOTOCATALYSIS OF THE IRREVERSIBLE ONE-ELECTRON AND 2-ELECTRON REDUCTION OF HALOTHANE ON PLATINIZED COLLOIDAL TITANIUM-DIOXIDE IN AQUEOUS SUSPENSION [J].

BAHNEMANN, DW ;

MONIG, J ;

CHAPMAN, R .

JOURNAL OF PHYSICAL CHEMISTRY, 1987, 91 (14) :3782-3788

[3] RECOVERY OF PROPYLENE-GLYCOL FROM DILUTE AQUEOUS-SOLUTIONS VIA REVERSIBLE-REACTION WITH ALDEHYDES [J].

BROEKHUIS, RR ;

LYNN, S ;

KING, CJ .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1994, 33 (12) :3230-3237

[4] Degradation of monomethylmercury chloride by hydroxyl radicals in simulated natural waters [J].

Chen, J ;

Pehkonen, SO ;

Lin, CJ .

WATER RESEARCH, 2003, 37 (10) :2496-2504

[5] HIGHLY EFFICIENT HYDROGEN AND ETHYLENE-GLYCOL PHOTOPRODUCTION FROM AQUEOUS-METHANOL SOLUTION BY ZNS AND AN IN-SITU SPIN-TRAPPING INVESTIGATION [J].

CHEN, LH ;

GU, WZ ;

ZHU, XW ;

WANG, FD ;

SONG, YZ ;

HU, JH .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 1993, 74 (01) :85-89

[6] PHOTOREDUCTIVE MECHANISM OF CCL4 DEGRADATION ON TIO2 PARTICLES AND EFFECTS OF ELECTRON-DONORS [J].

CHOI, WY ;

HOFFMANN, MR .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1995, 29 (06) :1646-1654

[7] ROLE OF OH. RADICALS AND TRAPPED HOLES IN PHOTOCATALYSIS - A PULSE-RADIOLYSIS STUDY [J].

LAWLESS, D ;

SERPONE, N ;

MEISEL, D .

JOURNAL OF PHYSICAL CHEMISTRY, 1991, 95 (13) :5166-5170

[8]

LINDNER M, 1995, P 1995 ASMEJSMEJSES

[9] KINETICS OF PHOTOCATALYTIC OXIDATION OF ORGANIC SOLUTES OVER TITANIUM-DIOXIDE [J].

MATTHEWS, RW .

JOURNAL OF CATALYSIS, 1988, 111 (02) :264-272

[10] PURIFICATION OF WATER WITH NEAR-UV ILLUMINATED SUSPENSIONS OF TITANIUM-DIOXIDE [J].

MATTHEWS, RW .

WATER RESEARCH, 1990, 24 (05) :653-660