TY - JOUR
T1 - Synthesis of Highly Nanoporous β-Silicon Carbide from Corn Stover and Sandstone
AU - Wang, Tongtong
AU - Gong, Weibo
AU - He, Xin
AU - Kou, Zuhao
AU - Tan, Gang
AU - Zhou, Shaojun
AU - Yu, Hongtao
AU - Fan, Maohong
AU - Kung, Harold H.
N1 - Funding Information:
National Science Foundation under award no. NSF IOA-1632899 and Department of Energy, Office of Science, Office of Basic Energy Sciences under award no. DE-FG02-03-ER15457.
Funding Information:
We thank the National Science Foundation (NSF 1632899) for its support in this research. H.H.K. acknowledges support by the Department of Energy, Office of Science, Office of Basic Energy Sciences under award no. DE-FG02-03-ER15457.
PY - 2020/10/5
Y1 - 2020/10/5
N2 - Porous β-Silicon carbide (β-SiC) is an important ceramic material due to its superior properties, such as high surface area, excellent chemical and mechanical stability, and high resistance toward oxidation and corrosion. In this study, inexpensive and easily obtained corn stover and sandstone were used as the carbon and silicon sources, respectively, and porous β-SiC was effectively synthesized with a high yield. The synthesized β-SiC was characterized by XRD, Raman, SEM, TEM, and TGA, and the gaseous products were also analyzed with an integrated furnace-MS system. The results show that the produced β-SiC exhibited a nanostructure that followed the graphitic carbon template derived from the pyrolysis of the corn stover. The surface area as high as 397 m2/g, the pore volume of 0.4 cm3/g, as well as the majority pore diameters of 3-6 nm were achieved. CO and CO2 were released during the reaction between vaporized SiO and graphite. The effect of temperature in the range of 1000 to 1700 °C was also studied, and the results point to a strong dependence between the process temperature and the yield and density of β-SiC. Also, the possible mechanism of synthesized β-SiC was proposed and confirmed with experimental results. This study provides a simple and an eco-friendly carbothermal reduction approach to produce nanoporous β-SiC with agriculture waste and sandstone, which could help establish the green economy in the US.
AB - Porous β-Silicon carbide (β-SiC) is an important ceramic material due to its superior properties, such as high surface area, excellent chemical and mechanical stability, and high resistance toward oxidation and corrosion. In this study, inexpensive and easily obtained corn stover and sandstone were used as the carbon and silicon sources, respectively, and porous β-SiC was effectively synthesized with a high yield. The synthesized β-SiC was characterized by XRD, Raman, SEM, TEM, and TGA, and the gaseous products were also analyzed with an integrated furnace-MS system. The results show that the produced β-SiC exhibited a nanostructure that followed the graphitic carbon template derived from the pyrolysis of the corn stover. The surface area as high as 397 m2/g, the pore volume of 0.4 cm3/g, as well as the majority pore diameters of 3-6 nm were achieved. CO and CO2 were released during the reaction between vaporized SiO and graphite. The effect of temperature in the range of 1000 to 1700 °C was also studied, and the results point to a strong dependence between the process temperature and the yield and density of β-SiC. Also, the possible mechanism of synthesized β-SiC was proposed and confirmed with experimental results. This study provides a simple and an eco-friendly carbothermal reduction approach to produce nanoporous β-SiC with agriculture waste and sandstone, which could help establish the green economy in the US.
KW - beta-silicon carbide
KW - corn stover
KW - nanoporous microstructure
KW - sandstone
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U2 - 10.1021/acssuschemeng.0c04702
DO - 10.1021/acssuschemeng.0c04702
M3 - Article
AN - SCOPUS:85095123682
VL - 8
SP - 14896
EP - 14904
JO - ACS Sustainable Chemistry and Engineering
JF - ACS Sustainable Chemistry and Engineering
SN - 2168-0485
IS - 39
ER -