Carbothermal synthesis of porous silicon carbide using mesoporous silicas

Morphological features of porous silicon carbide obtained via a carbothermal method

“…According to our previous studies the obtained samples are almost pure β‐modification of silicon carbide (β‐SiC) …”

“…Silicon carbide samples were synthesized as described elsewhere . The most pertinent details are provided below.…”

“…Silicon carbide samples were synthesized as described elsewhere. 13,14 The most pertinent details are provided below. SiC-1 was generated from a mixture of sucrose (Ecolab, Kyiv, Ukraine) and silica (Aerosil A-175, Chlorovinyl Co, Kalush, Ukraine), sucrose/silica wt.…”

“…Nanocrystalline silicon carbide β‐modification with substantial surface area (up to 147 m 2 /g) and mesoporosity (pores of 5‐40 nm in diameter) was formed after heating of spatially ordered mesoporous carbons (carbon replicas of MCM‐48, SBA‐15, KIT‐6 silica matrices) with silicon powder at 1200‐1300°C . In our previous work it was shown that β‐SiC with a developed surface area (up to 410 m 2 /g) and high pore volume (up to 1.0 cm 3 /g) can be obtained via carbothermal reduction using carbon‐silica composites based on various types of silica MMS (SBA‐15, KIT‐6, MCF, SBA‐3) …”

“…5 In our previous work it was shown that b-SiC with a developed surface area (up to 410 m 2 /g) and high pore volume (up to 1.0 cm 3 /g) can be obtained via carbothermal reduction using carbon-silica composites based on various types of silica MMS (SBA-15, KIT-6, MCF, SBA-3). 13,14 It should be, however, stated that mechanistic details of silicon carbide formation with a specific morphology (particles, fibers) in particular in the case of carbothermal reduction of silica remain unclear and should be further explored.…”