Abstract:

A novel N-doped TiO₂/Chitosan (CS) composited film, as a promising alternative material, was prepared, and could be more potential compared with tradition materials for treating wastewater. When this material, N-doped TiO₂/CS film, was used for removing Methyl Orange (MO) under simulated solar light irradiation, about 99% of total MO removal was achieved due to the combination effect of photo-degradation and adsorption processes. N-doped TiO₂/CS photo-catalyst was characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FT-IR) analysis. The results indicate that there exist the reactive groups NH₂, OH on the N-doped TiO₂ film, and their contents in the prepared photo-catalyst are responsible for the photo-degradation and adsorption effect, which was confirmed by FT-IR. Hence, it is possible that using N-doped TiO₂/ CS film as a simple method for removal of the pollutants in wastewater.

Key words: N-TiO₂, chitosan, nanoparticles, composited film, degradation

摘要：

氮掺杂二氧化钛/壳聚糖(CS)复合膜是一种有前途的有机染料废水处理材料,相对于传统的废水处理材料更具优势。在模拟太阳光照射下,用氮掺杂二氧化钛/壳聚糖(CS)复合膜对有机染料甲基橙溶液进行降解,通过吸附和光催化的双重作用,甲基橙的降解率可达99%。采用X射线衍射(XRD)、扫描电子显微镜(SEM)等对复合膜进行了表征,并通过傅里叶红外光谱(FT-IR)分析表明其壳聚糖中活性官能团 NH₂, OH在氮掺杂TiO₂ 复合膜中同时存在。研究表明,氮掺杂二氧化钛/壳聚糖(CS)复合膜是一种高效节能的污水处理材料。

关键词: N-TiO₂, 壳聚糖, 纳米颗粒, 复合膜, 降解