甲基橙在聚吡咯/纳米SiO2复合材料上的氧化性能

The oxidation property of methyl orange on polypyrrol/nano-SiO_2 composite

采用紫外-可见光谱法研究了甲基橙在聚吡略/纳米SiO2复合材料（PPy/n-SiO2）上的氧化性能.结果 表明：在弱酸性介质中,PPy/n-SiO2对甲基橙的氧化性能明显优于聚吡略;反应5 ～40 min时,甲基橙氧化反 应符合表观一级反应动力学;反应60 min时,甲基橙的降解率可达到94.7% ;PPy/n-SiO2经二次回收再生后, 反应60 min时甲基橙降解率为96. 5% .

Polypyrrol/nano-SiO2 composite （PPy/n-SiO2 ） was prepared, the oxidation property of methyl orange on PPy/n-SiO2 was investigated by UV-visible absorption spectroscopy. As compared with polypyrrol, oxidation reaction of methyl orange on PPy/n-SiO2 was quite fast in weak acidic medium. The oxidation process was in accordance with the apparent first-order kinetics within 5 to 40 minutes, and the degradation rate about methyl orange was 94. 7% within 60 minutes. After the secondary recycling of PPy/n-SiO2 , the degradation rate about methyl orange was 96.5% within 60 minutes.