纳米二氧化钛负载改性天然高分子材料的研究

Loading of nano-TiO_2 on the modified natural polymer materials

对丝瓜络及纳米二氧化钛进行接枝改性处理,再以戊二醛为中间反应物进行丝瓜络及纳米二氧化钛的交联反应从而在丝瓜络表面形成纳米二氧化钛薄膜,制备复合光催化剂。通过傅立叶变换红外光谱仪(FTIR)及扫描电子显微镜(SEM)对样品结构、形貌进行了分析表征,表明纳米二氧化钛通过KH550的连接负载到了丝瓜络表面;室温下,以甲基橙为底物在365nm波长的紫外光照射下进行光催化降解试验,结果表明,复合光催化剂对甲基橙的催化降解率达到32.21%,且重复性光降解试验表明其可持续光降解能力较好。

The composite photocatalyst was produced by loading nano-TiO2 on the film of natural polymer material（loofah sponge）.The loofah sponge and nano-TiO2 were graft-modified,and then the glutaraldehyde was used as the intermediate reactant to conduct the crosslinking reaction of the loofah and the nano-TiO2,and finaly led to the nano-TiO2 film forming on the surface of loofah.The infrared spectroscopy（FTIR）and scanning electron microscopy（SEM）were used to characterize the structure and morphology of loofah sponge samples.Results showed that the nano-TiO2 was well loaded on the surface of the loofah sponge by the connection of KH550.Photocatalytic degradation of methyl orange solution was conducted at room temperature with UV-light（365nm）as light source and the produced composite photocatalyst as photocatalyst.The results showed that the degradation rate of methyl orange reached to 32.21%,and the sustainable photodegradation capability of composite photocatalyst was perfect.