Department of Chemistry, Indiana University, Bloomington, Indiana 47405, USA.
Langmuir. 2010 Jun 1;26(11):8804-9. doi: 10.1021/la904549t.
Ultrasonic spray pyrolysis has been used as a facile aerosol route to macroporous SiO(2) particles using simple inorganic salts as a pore template and colloidal SiO(2) as building blocks to the larger porous particles. As we found, the use of template salts with low melting points was vital to macroporous particle synthesis, as a dynamic droplet phase can be maintained throughout product formation. Otherwise, relatively compact particles are produced. Significantly, this approach avoids the need for post-isolation elimination of the template, instead permitting aqueous removal during product collection. Produced particles were characterized by SEM, TEM, and surface area and pore size measurements, while the influence of the selected salts on the reactivity between the building block SiO(2) colloids is discussed.
超声喷雾热解法已被用作一种简便的气溶胶途径，使用简单的无机盐作为孔模板和胶体二氧化硅作为构建块来制备大孔二氧化硅颗粒。正如我们所发现的，使用低熔点的模板盐对于大孔颗粒的合成至关重要，因为在整个产物形成过程中可以保持动态的液滴相。否则，会生成相对致密的颗粒。重要的是，这种方法避免了在分离后去除模板的需要，而是可以在产物收集过程中用水去除。所制备的颗粒通过 SEM、TEM 以及表面积和孔径测量进行了表征，同时还讨论了所选盐对构建块二氧化硅胶体之间反应性的影响。
