ABSTRACT

Mesoporous SBA-15 has been synthesised using a binary acid H₂SO₄ as media. The effects of H₂SO₄ concentration and synthesis temperature on the morphologies and mesostructures of the obtained mesoporous SBA-15 materials were studied. The results revealed that the more-ordered structure was obtained at a H₂SO₄ concentration of 2 M, while a higher H₂SO₄ concentration of 3 M led to a less-ordered structure. In addition, with increasing H₂SO₄ concentration from 1 to 3 M, the morphologies of SBA-15 particles transferred from rod-like to sphere-like. This work demonstrated that mesoporous SBA-15 with various textural properties and morphologies can be feasibly obtained by controlling the H₂SO₄ concentration and synthesis temperature.

摘要

已经使用二元酸H ₂ SO ₄作为介质合成了介孔SBA-15 。研究了H ₂ SO ₄浓度和合成温度对所得介孔SBA-15材料的形貌和介观结构的影响。结果表明，在2 M的H ₂ SO ₄浓度下可获得更有序的结构，而在3 M的H ₂ SO ₄浓度较高时则得到的结构较不规则。另外，随着H ₂ SO _4的增加浓度从1到3 M，SBA-15颗粒的形态从棒状转移到球形。这项工作表明，通过控制H ₂ SO _4的浓度和合成温度，可以容易地获得具有各种质地特性和形态的介孔SBA-15 。