| 镧离子掺杂纳米TiO2光催化降解聚乙烯薄膜的研究 |
| |
| 引用本文： | 李凤仪,熊裕华.镧离子掺杂纳米TiO2光催化降解聚乙烯薄膜的研究[J].中国稀土学报,2005,23(4):444-448. |
| |
| 作者姓名： | 李凤仪 熊裕华 |
| |
| 作者单位： | 1. 南昌大学应用化学研究所
2. 南昌大学应用化学研究所;南昌大学材料科学工程学院,江西,南昌,330047 |
| |
| 基金项目： | 国家自然科学基金 (20263003)和南昌大学青年基金 (Z 02445)资助项目 |
| |
| 摘 要： | La3 掺杂纳米TiO2光催化剂后,用于固相光催化降解聚乙烯(PE)薄膜。在紫外线辐射288h后,0.1%La2O3/TiO2使薄膜失重14.5%,产生更多石蜡和CO2,SEM表明其对PE的光氧化腐蚀能力更强,在薄膜表面形成更大更多的凹坑和空洞,红外光谱表明PE薄膜中的-CH2和支链-CH3基团的吸收明显减少,0.1%La2O3/TiO2光催化剂使PE的C=O的吸收增大。La3 掺杂后,提高了纳米TiO2的光催化活性。
|
| 关 键 词： | TiO2 La3 掺杂 聚乙烯 降解 固相反应 稀土 |
| 文章编号： | 1000-4343(2005)04-0444-05 |
| 修稿时间： | 2004年12月23 |
Photocatalystic Oxidation Degradation of Polyethylene by Nano-TiO2 Doped Rare Earth Ion |
| |
| Li Fengyi,XIONG Yuhua.Photocatalystic Oxidation Degradation of Polyethylene by Nano-TiO2 Doped Rare Earth Ion[J].Journal of the Chinese Rare Earth Society,2005,23(4):444-448. |
| |
| Authors: | Li Fengyi XIONG Yuhua |
| |
| Institution: | Li Fengyi~1,Xiong Yuhua~ |
| |
| Abstract: | Nano-sized TiO_2 doped La~(3+), was used as photocatalysis to degrade polyethylene (PE) film in solid-state reaction. It made PE lose its mass fraction of 14.5%, and formed more quantities of CO_2 and more wax yields after UV irradiation for 288 h. SEM images displayed more and bigger holes and pits in the PE film. FT-IR spectra showed that there is a lower absorbance of groups of -CH_2 and -CH_3 in PE/TiO_2 and 0.1% La_2O_3/TiO_2/PE composite materials than that in PE film sample of photodegradation, and more carbonyl groups in PE/0.1%La_2O_3/TiO_2. La~(3+) doping TiO_2 improves TiO_2 activities of oxidation and erosion of PE film under UV irradiation. |
| |
| Keywords: | TiO_2 La~(3+) dopant polyethylene (PE) degradation reaction in solid state rare earths |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
