Synthesis of Silica Nanotubes with Orientation Controlled Mesopores in Porous Membranes via Interfacial Growth
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- 作者：Anfeng Zhang ; Keke Hou ; Lin Gu ; Chengyi Dai ; Min Liu ; Chunshan Song ; Xinwen Guo
- 刊名：Chemistry of Materials
- 出版年：2012
- 出版时间：March 27, 2012
- 年：2012
- 卷：24
- 期：6
- 页码：1005-1010
- 全文大小：397K
- 年卷期：v.24,no.6(March 27, 2012)
- ISSN：1520-5002
文摘
Silica nanotubes with mesopores perforating the wall were synthesized on the channel surface of porous anodic alumina (PAA) or polycarbonate membranes via interfacial growth. Transmission and scanning electron microscopy characterizations indicated that the mesopore orientation can be regulated from perpendicular to the wall to circling the axis when the thickness of the silica nanotube wall increases from about 15 to 40鈥?0 nm, without any modification of the channel surface or external forces, just by optimizing the amount of the tetraethoxysilane confined in the channels of PAA. Mesopores in the silica nanotube wall arrange hexagonally when the diameter of the silica nanotubes is larger than 200 nm.