改性纳米TiO₂固相光催化降解废弃聚氯乙烯

改性纳米TiO 2 固相光催化降解废弃聚氯乙烯 Preparation of Polyvinyl Chloride-Modified-TiO 2 Nanocomposites and Its Solid-Phase Photocatalytic Degradation 法文君 FA Wen-jun 1 2 first-author 昝菱 ZAN Ling 1 2 胡严鹤 HU Yan-he 1 2 陈俊桥 CHEN Jun-qiao 1 2 武汉大学化学与分子科学学院 武汉大学化学与分子科学学院 College of Chemistry and Molecular Sciences, Wuhan University College of Chemistry and Molecular Sciences, Wuhan University 武汉大学化学与分子科学学院,湖北,武汉,430072 武汉大学化学与分子科学学院,湖北,武汉,430072 用偶联剂改性的纳米TiO2作催化剂,采用包埋法制备了一种新型的可光催化降解的纳米PVC-M-TiO2复合薄膜.在空气中紫外光照的条件下进行了该薄膜的光催化降解实验,并与以未改性的TiO2为催化剂的PVC-Un-TiO2复合薄膜的降解效率进行了比较.利用光照失重、傅立叶红外（FT-IR）光谱和扫描电子显微镜（SEM）等方法对光照前后复合薄膜进行了分析表征.实验结果表明PVC-M-TiO2复合薄（TiO2质量百分含量为2%）膜在空气中能被有效的降解,连续光照480h后降解效率达到36.9%,明显高于纯膜及未改性的PVC-Un-TiO2复合膜. The nanometer TiO 2 particles were modified by titanate coupling agents. The photodegradable polyvinyl chloride-modified-TiO 2 （PVC-M-TiO 2 ） nanocomposite films were prepared by embedding the modified-TiO 2 particles into the commercial polyvinyl chloride. Solid-phase photocatalytic degradation of the PVC-M-TiO 2 nanocomposites were carried out in ambient air at room temperature under ultraviolet lamp. The properties of composite films were compared with that of the pure PVC films and PVC-Un-TiO 2 composite films by weight-loss measurement, FT-IR spectroscopy and SEM （scanning electron micrograph）.The results showed that the PVC-M-TiO 2 composite films were degradable in the air. After 480 h irradiation, the photo-induced degradation rate of PVC-M-TiO 2 composite films（TiO 2 2%） could reach （36.9%,） which was notably higher than that of both the pure PVC films and the PVC-Un-TiO 2 composite films. 聚氯乙烯 固相光催化降解 纳米TiO2 PVC-M-TiO2纳米复合薄膜 polyvinyl chloride solid-phase photocatalytic degradation nano-titanium dioxide PVC-M-TiO2 nanocomposite film X705 湖北省科技攻关计划资助项目（2004AA101C34） 2005-04-01 2021-04-01 4