文献类型：期刊文献

中文题名：N掺杂TiO_2对聚乙烯复合薄膜的光催化降解研究

英文题名：Photocatalyzed degradation of polyethylene composite film by N-doped titanium dioxide photocatalyst

作者：苗超林[1];杨书廷[2];尹艳红[2];刘山虎[3]

第一作者：苗超林

机构：[1]新乡学院化学与化工系;[2]河南师范大学化学与环境科学学院;[3]河南大学化学化工学院

第一机构：新乡学院化学化工学院

年份：2011

卷号：22

期号：4

起止页码：11-14

中文期刊名：化学研究

外文期刊名：Chemical Research

收录：CSTPCD

语种：中文

中文关键词：聚乙烯复合薄膜;纳米TiO2;N掺杂;光催化降解

外文关键词：polyethylene composite film; nano-sized TiO2; N-doping; photocatalyzed degradation

摘要：以快速溶胶-凝胶法制备了具有不同N掺杂量的TiO2光催化剂,在室温光照240 h条件下,用于固相光催化降解碳酸钙填充聚乙烯复合材料薄膜;采用X射线光电子能谱仪(XPS)、X射线衍射仪(XRD)、紫外-可见光漫反射仪(UV-Vis)、傅立叶变换红外光谱仪(FTIR)、扫描电子显微镜(SEM)等手段分析了催化剂和薄膜的形貌及化学特征,并测定了复合材料薄膜的失重.结果表明,未掺杂的TiO2光催化剂使复合材料薄膜失重0.97%,掺杂的TiO2光催化剂使其最大失重达到21.3%.这是由于掺杂的TiO2光催化剂加速复合材料薄膜碳链的断裂和光氧化腐蚀、在薄膜表面形成大量的凹坑所致.与此同时,0.5%质量分数N掺杂的TiO2光催化剂光催化降解聚乙烯复合材料薄膜的活性最高.
N-doped TiO2 photocatalysts containing different percentage of N were prepared by sol-gel process.Resultant N-doped TiO2 photocatalysts were then used to catalyze the degradation of polyethylene（PE） composite film filled with CaCO3 under solar light irradiation for 240 h in ambient air.The microstructure and chemical features of the photocatalysts and PE films were characterized by means of X-ray photoelectron spectroscopy（XPS）,ultraviolet-visible light diffuse reflection spectrometry（UV-Vis）,X-ray diffraction（XRD）,Fourier transform infrared spectrometry（FT-IR）,and scanning electron microscopy（SEM）;and the weight loss of PE composite film was measured.Results show that undoped TiO2 results in weight loss of PE composite film by 0.97%,while N-doped TiO2 leads to 21.3% of weight loss of the PE film.The reason lies in that N-doped TiO2 photocatalysts are able to speed the breakage of PE molecular chains and promote photo-oxidation-induced corrosion,resulting in numerous pits and holes on the surface of the film.In the meantime,anatase TiO2 doped with 0.5% N possessed the highest activity for the photodegradation of PE composite film.