Photooxidation of dimethyl methylphosphonate on TiO2 powder

被引：79

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

页码：12299 / 12305

页数：7

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