摘要
采用漫反射红外光谱(DRIFTS)技术和循环伏安法对TiO2光催化剂上甲醛光催化氧化过程中催化剂表面吸附、降解行为进行了考察.研究了草酸盐对甲醛光催化氧化降解行为的影响,结果表明低浓度草酸钠的加入提高了甲醛的降解效率,这个结果归因于草酸根离子的存在能够清除吸附位上积聚的甲酸及类似中间产物.光电化学实验进一步证实了草酸钠对甲醛光催化氧化中间产物的清除作用.
The adsorption and degradation behavior of formaldehyde over the surface of TiO2 catalyst were investigated by DRIFTS method. The influence of oxalate on the photodegradation behaviour of formaldehyde was studied, the presence of oxalate produces an enhancement of formaldehyde degradation, which was caused that the oxalate remove the formation of adsorbed intermediates. On-line monitoring in photocatalytic degradation process of organic compound HCHO was carried out by cyclic voltammetry. Results farther reveal that the oxalate may remove the the intermediate of the photocatalytic process of formaldehyde.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2005年第5期376-382,共7页
Journal of Molecular Catalysis(China)
关键词
甲醛
草酸盐
降解
光催化氧化
Formaldehyde
Oxalate
Degradation
Photocatalytic Oxidation
