中孔徑分子篩SBA-16及[Si,Ga]-SBA-15之合成與鑑定

Synthesis and characterization of mesoporous molecular sieves SBA-16 and [Si,Ga]-SBA-15

林怡君(Yi-Chun Lin)

指導教授 ： 鄭吉豐

中原大學/理學院/化學研究所/碩士(2003年)

https://doi.org/10.6840/cycu200300456

摘要

摘要
本研究分為兩部分來討論。第一部分為立方排列中孔徑分子篩
SBA-16 的合成之最佳化研究，第二部分為直接合成矽酸鎵中孔徑分
子篩[Si,Ga]-SBA-15 最佳化研究。
矽酸鹽中孔徑分子篩SBA-16 經室溫反應即可合成出立方排列矽
酸鹽中孔徑分子篩SBA-16，其表面積可達450 m2 / g，孔洞大小為
3.5 nm。經過80℃熱處理後可使其表面積增加至800 m2 / g，孔洞大
小則為5.0 nm。不論在室溫合成或是在經過80℃熱處理的過程後，
從X-ray 繞射圖及狹窄的孔洞分佈圖中皆顯示有傑出的立方排列中孔
分子篩結構性質。
在直接合成鈉型矽酸鎵中孔徑分子篩SBA-15 部分，我們利用
NaOH 來調整溶液的pH 值，在經過90℃熱處理後的產物其可合成出
矽酸鎵分子篩的最佳條件為nNaOH / nGa(NO3)3 = 0.5。所合成出的產物其
表面積約為735∼800 m2/g，孔洞大小約為6.5∼8.0 nm，且百分之六
十以上鎵以四配位存在於骨架中。

關鍵字

中孔徑分子篩

並列摘要

III
Abstract
A series of cubic mesoporous molecular sieves SBA-16, which
surface area and pore size were about 450 m2/g and 3.5 nm, respectively,
were synthesized at room temperature for one hour or more. These
materials had ca. surface area of 800 m2/g and pore size of 8.0 nm after
hydrothermal treatment at 80 °C. Both series of SBA-16 with good XRD
patterns and narrow pore size distribution showed their excellent cubic
structure.
Gallium-incorporated mesoporous molecular sieves SBA-15 were
obtained by direct synthesis at low acid concentration. The condition of
preparing Na+-[Si, Ga]-SBA-15 is nNaOH / nGa(NO3)3 = 0.5. The resulting
materials retain the hexagonal order and physical properties of pure
siliceous SBA-15. It showed a very narrow pore size distribution with an
pore diameter of 6.5-8.0 nm and a high surface area of 735-800 m2 / g.

並列關鍵字

mesoporous molecular sieves

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