The incorporation of titania into modified silicates for solar photodegradation of aqueous species

被引：23

作者：

Matthews, LR ^{[1
]}

Avnir, D ^{[1
]}

Modestov, AD ^{[1
]}

Sampath, S ^{[1
]}

Lev, O ^{[1
]}

机构：

[1] HEBREW UNIV JERUSALEM,FREDY & NADINE HERRMANN SCH APPL SCI,DIV ENVIRONM SCI,IL-91904 JERUSALEM,ISRAEL

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 1997年 / 8卷 / 1-3期

关键词：

supported titania; photocatalysis; photodegradation; rhodamine B; ORGANIC-MOLECULES; TIO2; SUSPENSIONS;

D O I：

10.1023/A:1018312007966

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A new class of sol-gel-derived photocatalytic materials has been synthesized and used in solar-assisted photodegradation studies. The materials are comprised of a homogeneous dispersion of commercial TiO2 powder into silica and organically modified silicate (Ormosil) hosts. The efficiency of the photocatalytic properties of these TiO2-containing materials was determined by their relative performance in the solar photodecomposition of aqueous rhodamine B. The improved adsorption properties of the modified materials compared to commercial TiO2 increase the photodecomposition rate and the buoyancy properties, although excess hydrophobicity decreases the wetted section of the catalyst and its photocatalytic performance. These materials can be used as floatable catalysts for solar-assisted water purification.

引用

页码：619 / 623

页数：5

共 16 条

[1] ANDERSON C, IN PRESS J PHYS CHEM
[2] AVNIR D, 1987, J NONCRYST SOLIDS, V192, P181
[3] PREPARATION AND UTILIZATION OF ORGANICALLY MODIFIED SILICA-TITANIA PHOTOCATALYSTS FOR DECONTAMINATION OF AQUATIC ENVIRONMENTS
DAGAN, G
SAMPATH, S
LEV, O
[J]. CHEMISTRY OF MATERIALS, 1995, 7 (03) : 446 - 453
[4] TIO2 AEROGELS FOR PHOTOCATALYTIC DECONTAMINATION OF AQUATIC ENVIRONMENTS
DAGAN, G
TOMKIEWICZ, M
[J]. JOURNAL OF PHYSICAL CHEMISTRY, 1993, 97 (49) : 12651 - 12655
[5] DAGAN G, 1993, ENV ASPECTS ELECTROC
[6] ORGANIC HETEROGENEOUS PHOTOCATALYSIS - CHEMICAL CONVERSIONS SENSITIZED BY IRRADIATED SEMICONDUCTORS
FOX, MA
[J]. ACCOUNTS OF CHEMICAL RESEARCH, 1983, 16 (09) : 314 - 321
[7] GREEN FJ, 1990, SIGMA ALDRICH DB STA
[8] GREGG SJ, 1982, ADSORPTION SURFACE A, pCH3
[9] ATTACHMENT OF TIO2 POWDERS TO HOLLOW GLASS MICROBEADS - ACTIVITY OF THE TIO2-COATED BEADS IN THE PHOTOASSISTED OXIDATION OF ETHANOL TO ACETALDEHYDE
JACKSON, NB
WANG, CM
LUO, Z
SCHWITZGEBEL, J
EKERDT, JG
BROCK, JR
HELLER, A
[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1991, 138 (12) : 3660 - 3664
[10] PHOTOLYSIS OF CHLOROFORM AND OTHER ORGANIC-MOLECULES IN AQUEOUS TIO2 SUSPENSIONS
KORMANN, C
BAHNEMANN, DW
HOFFMANN, MR
[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1991, 25 (03) : 494 - 500

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