Synthesis of uniform and stable millimeter-sized mesoporous silica ropes by the addition of polymer and ammonia hydrothermal treatment

Hong Ping Lin, Lu Yi Yang, Chung Yuan Mou, Huang Kuei Lee, Shang Bin Liu

研究成果: 雜誌貢獻文章同行評審

10 引文 斯高帕斯(Scopus)

摘要

The addition of water-soluble polymers such as polyethylene oxide (PEO) or polyvinyl alcohol (PVA) into the synthetic mixture of the CnTMAX-HNO3-TEOS-H2O system (n = 16 or 18; X = Br or Cl) under shear flow is found to promote uniformity and elongation of rope-like mesoporous silica. The millimeter-scaled mesoporous silica ropes are found to possess a three-level hierarchical structure. The addition of water-soluble polymer does not affect the physical properties of the silica ropes. Moreover, further hydrothermal treatment of the acid-made material under basic ammonia conditions effectively promotes reconstruction of the silica nanochannels while maintaining the rope-like morphology. As a result, a notable enhancement in both thermal and hydrothermal stability is found.

原文英語
頁(從 - 到)7-14
頁數8
期刊Studies in Surface Science and Catalysis
129
DOIs
出版狀態已發佈 - 2000
對外發佈

ASJC Scopus subject areas

  • 催化
  • 凝聚態物理學
  • 物理與理論化學
  • 表面、塗料和薄膜
  • 材料化學

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