Photooxidation of dimethyl methylphosphonate on TiO2 powder

被引：78
|
作者：
Rusu, CN [1 ]
Yates, JT [1 ]
机构：
[1] Univ Pittsburgh, Ctr Surface Sci, Dept Chem, Pittsburgh, PA 15260 USA
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 2000年 / 104卷 / 51期
关键词：
D O I：
10.1021/jp002562a
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：
The photooxidation of dimethyl methylphosphonate (DMMP) on powdered TiO2 has been studied using UV irradiation in the range 2.1 eV to 5.0 eV. It has been found that the P-CH3 and the P-OCH3 moieties are destroyed together by photooxidation, producing adsorbed CO and CO2 as well as formate ions and water. By working at 200 K the photooxidation process has been studied alone, whereas at room temperature both hydrolysis and photooxidation will occur together. An adsorbed PO3 species is the final phosphorus-containing photooxidation product. High coverages of DMMP are not photooxidized due to site blockage for O-2 adsorption on the TiO2 surface.
引用
收藏
页码：12299 / 12305
页数：7
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