Mechanism of forming an ink-bottle-like pore structure based on SBA-15 by a novel MOCVD technique

• 来源期刊: 科学通报(英文版)
• 学科: 工学
• 关键词: 金属有机化学气相沉积 化学气相沉积技术 SBA 分子筛 孔结构 铜复合材料 化学气相沉积法 透射电子显微镜
• 年，卷（期）: 2010,（4）
• 所属期刊栏目: ARTICLES
• 页码范围: 446-451
• 页数: 6页
• 分类号: TQ320.721 O472.3
• 语种: 英文

摘要

Metallorganic chemical vapor deposition is used as a novel simple pore tailoring method to fine-trine the pore opening size of SBA-15 materials without significant loss in pore volume and surface area. By using acetylene as carbon source and copper (n) acetylacetonate as precursor, the poremouth of SBA-15 is effectively reduced from 5.78 um to 3.67 nm while maintaining the pore body at 5.78 nm. The effect of four pore modification factors--the ratio of acetylene/nitrogen, the feeding time of carbon precursor, the ratio of SBA-C/Cu(acac)2 and the cycles of MOCVD on the final pore structure of the SBA-15/carbon/copper composite is studied. The morphology and microstructure of the resulting product SBA-C-Cu are characterized by XRD patterns, TEM images and EDS analysis. The XRD and TEM reveal that the SBA-C-Cu composite is highly hexagonally ordered and has similar particle morphology as the original SBA- 15.