铌酸银可见光催化降解聚氯乙烯薄膜  

Visible Photocatalytic Degradation of Polyvinyl Chloride Film by AgNbO_3 Photocatalyst

作　　者：王丹丹[1] 刘俊渤[1] 常海波[1] 唐珊珊[1] 

机构地区：[1]吉林农业大学资源与环境学院,长春130118

出　　处：《高等学校化学学报》2014年第9期1975-1981,共7页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21302062)资助~~

摘　　要：采用涂层法在玻璃基底上分别制备了纯聚氯乙烯(PVC)薄膜和添加水热法制备的钙钛矿型铌酸银(AgNbO3)光催化剂的复合薄膜(PVC-wAgNbO3,其中w为AgNbO3的质量分数),在500 W氙灯照射120 min条件下进行了薄膜的光催化降解实验.利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)和傅里叶变换红外光谱仪(FTIR)等对光照前后薄膜的形貌及光催化降解过程进行了表征.结果表明,在光催化降解过程中纯PVC薄膜失重率为4.09%,而PVC-3%AgNbO3,PVC-6%AgNbO3,PVC-9%AgNbO3和PVC-15%AgNbO3复合薄膜分别失重20.36%,23.52%,27.62%和33.83%.AgNbO3光催化剂加速了PVC薄膜的降解,且随着AgNbO3光催化剂添加量的增加,PVC薄膜的光催化降解速率不断增大.Pure polyvinyl chloride （ PVC ） film and PVC-AgNbO3 hybrid films were prepared on glass sub-strates via a coating method. The photocatalytic degradation experiments were carried out under xenon lamp irradiation. The samples were characterized by X-ray diffractometer （ XRD ） , scanning electron microscope （ SEM） , and Fourier transform infrared spectrometer（ FTIR） . The results show that PVC-AgNbO3 hybrid films have much higher photocatalytic degradation activity than pure PVC film. The photodegradation performance of the films can be evaluated directly by their mass loss. The mass loss of the pure PVC film was about 4. 09%after irradiation under xenon lamp for 120 min, that of the PVC-3% AgNbO3 , PVC-6% AgNbO3 , PVC-9%AgNbO3 , and PVC-15% AgNbO3 films reached about 20. 36%, 23. 52%, 27. 62% and 33. 83% after irra-diation for 120 min, respectively. The mass loss of PVC increased with the increase of the content of AgNbO3 . This result prove that the presence of AgNbO3 remarkably promote the photocatalytic degradation rate of PVC film.

关 键 词：聚氯乙烯薄膜 铌酸银 可见光催化降解 

分 类 号：O643.3[理学—物理化学]