纳米锐钛矿TiO2光催化剂用于室温下固相光催化降解等离子体改性聚氯乙烯(PVC)薄膜的研究.对薄膜进行了扫描电子显微镜(SEM)、傅立叶红外光谱(FI-IR)、X光电子能谱(XPS)分析.结果表明,400 W紫外光辐射60 h后,PVC质量损失为1.393%;等离子体改性PVC-TiO2质量损失为1.966%,这表明TiO2加速了高分子碳链的断裂和光氧化.在等离子体改性PVC-TiO2表面形成大量的裂纹,XPS显示光催化降解后在等离子体改性PVC-TiO2的表面的C和Cl的原子浓度分别为83.15%和0.89%,达到最小值.等离子体改性的PVC的降解机理是等离子体改性PVC后,在PVC表面生成的自由基诱发了TiO2的光催化氧化的·OH自由基反应.
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