Characterization of a composite photocatalyst

被引：18

作者：

Vaisman, E ^{[1
]}

Cook, RL ^{[1
]}

Langford, CH ^{[1
]}

机构：

[1] Univ Calgary, Dept Chem, Calgary, AB T2N 1N4, Canada

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2000年 / 104卷 / 36期

关键词：

D O I：

10.1021/jp000473s

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Low loading of TiO2 on the zeolite ZSM-5 produced a photocatalyst of high efficiency, especially with efficient light harvesting.(7) Comparison of 90 degrees pulse Si-29 NMR spectra with H-1-Si-29 CP-MAS spectra allows measurement of -OH displaced from the zeolite surface by Si-O-Ti chemisorption. The coverage by 2.5 wt % TiO2 is 16-18% of the BET surface area. A theoretical monolayer of anatase TiO2 loaded to 2.5 wt % is calculated to cover 10%-20% of the BET surface, depending upon the orientation of the anatase unit cell. Loading TiO2 above 2.5 wt % leads to further growth of the titania phase without further -OH displacement and increase of the coverage of the surface. Energy filtered TEM shows that TiO2 growth occurs at irregularities on the ZSM-5 surface.

引用

页码：8679 / 8684

页数：6

共 25 条

[1] TITANIA AND ALUMINA CERAMIC MEMBRANES [J].