Template synthesis of mesoporous carbons with a controlled particle size
Template synthesis of mesoporous carbons with a controlled particle size
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DOI：
10.1039/b307373d
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发表时间：
2003-11
影响因子：
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通讯作者：
A. B. Fuertes
中科院分区：
文献类型：
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作者：
A. B. Fuertes
以表面活性剂为结构导向剂合成的介孔二氧化硅材料为模板，制备了介孔碳材料。通过改变合成过程中的操作参数，可以连续调节二氧化硅的粒度，从纳米粒子(∼10-20 nm)到微米球形粒子(∼2-8µm)。以介孔结构二氧化硅为模板制备的多孔炭保持了模板的大小和形状。这样，通过使用合适的二氧化硅模板，可以很容易地在10 nm到10µm的较宽范围内选择所获得的多孔炭的初级颗粒尺寸。这些碳具有大的孔体积(>；1.4cm3g−1)、大的比表面积(>；1800m2 g−1)和由大小在中孔范围内的孔组成的孔隙率。微米级碳具有完美的球状形貌和由∼3 nm结构介孔组成的单峰孔系统。在亚微米和纳米尺度上合成的其他碳，除了骨架限制的孔隙率(∼3 nm)外，还表现出由初级颗粒之间的颗粒间空隙产生的织构孔隙率。
Mesostructured silica materials synthesised with the aid of surfactants as structure directing agents were used as templates to fabricate mesoporous carbons. By modifying the operational parameters during the synthesis, the particle size of silica can be continuously modulated from nanometric particles (∼10–20 nm) to micrometric spherical particles (∼2–8 µm). The porous carbons fabricated by using the mesostructured silica as template maintain the size and shape of the template. In this way, the primary particle size of the obtained porous carbons can be easily selected in a wide range between 10 nm and 10 µm by using the appropriate silica template. These carbons exhibit large pore volumes (>1.4 cm3 g−1), large BET surface areas (>1800 m2 g−1) and a porosity made up of pores with sizes in the mesopore range. The micrometric carbon shows a perfectly spherical morphology and a unimodal pore system made up of structural mesopores of ∼3 nm. The other carbons synthesised at the sub-micrometric and nanometric length scales exhibit, in addition to the framework-confined porosity (∼3 nm), a textural porosity arising from the interparticle voids between the primary particles.