A facile chemical method for the synthesis of 3C-SiC nanoflakes

作者：Dragomir, Mirela^*; Valant, Matjaz; Fanetti, Mattia; Mozharivskyj, Yurij

来源：RSC Advances, 2016, 6(26): 21795-21801.

DOI：10.1039/c6ra00789a

• PHOTOCATALYTIC HYDROGEN-PRODUCTION
• SIC NANOWIRES
• RAMAN-SPECTROSCOPY
• EVOLUTION
• NANOCOMPOSITES
• FABRICATION
• MECHANISMS
• GROWTH
• CARBON

A facile chemical method for the synthesis of 3C-SiC nanoflakes is presented. The process involves the pyrolysis of polycarbosilane (PCS) at 700 degrees C, in a NaCl powder template, followed by thermal treatment at 1200 degrees C. The salt is easily removed by washing with water. The morphology of the SiC particles is found to be dependent on the NaCl/PCS weight ratio and by carefully tuning this ratio, different SiC structures can be obtained. While at NaCl/PCS ratios < 40 : 1 micrometer-sized particles with a foamy like structure result, a NaCl/PCS ratio of 40 : 1 is crucial for the formation of 3C-SiC nanoflakes. These nanoflakes are less than 5 nanometers thick, have a high specific surface area of 169 m(2) g(-1) and a high total pore volume of up to 0.75 cm(3) g(-1). This method could open a simple, versatile and robust way for the production of SiC nanostructures. Such a facile synthetic method could bring nanostructured SiC one step closer to the ultimate goal of practical applications.

• 出版日期2016
• 单位电子科技大学