Preparation of monolith SiC aerogel with high surface area and large pore volume and the structural evolution during the preparation

Yong Kong; Xiaodong Shen; Sheng Cui; Maohong Fan

doi:10.1016/j.ceramint.2014.01.025

Preparation of monolith SiC aerogel with high surface area and large pore volume and the structural evolution during the preparation

Yong Kong, Xiaodong Shen, Sheng Cui, Maohong Fan

College of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

83 Scopus citations

Abstract

Resorcinol-formaldehyde/silica composite (RF/SiO₂) aerogel was synthesized by sol-gel process followed by supercritical drying (SCD). Monolithic SiC aerogel was obtained from RF/SiO₂ aerogel after carbothermal reduction. The evolution of physical property, crystal structure, morphology and pore structure from RF/SiO₂ to SiC aerogel was investigated by different methods, such as X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and N ₂ adsorption/desorption. The as-synthesized SiC aerogel presented typical mesoporous structure and possessed high porosity (91.8%), high surface area (328 m²/g) and large pore volume (2.28 cm³/g). Carbothermal reduction mechanism was also discussed based on the experiment and characterization results.

Original language	English
Pages (from-to)	8265-8271
Number of pages	7
Journal	Ceramics International
Volume	40
Issue number	6
DOIs	https://doi.org/10.1016/j.ceramint.2014.01.025
State	Published - Jul 2014

Keywords

Carbothermal reduction
Microstructure
Silicon carbide
Sol-gel
Supercritical drying

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10.1016/j.ceramint.2014.01.025

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title = "Preparation of monolith SiC aerogel with high surface area and large pore volume and the structural evolution during the preparation",

abstract = "Resorcinol-formaldehyde/silica composite (RF/SiO2) aerogel was synthesized by sol-gel process followed by supercritical drying (SCD). Monolithic SiC aerogel was obtained from RF/SiO2 aerogel after carbothermal reduction. The evolution of physical property, crystal structure, morphology and pore structure from RF/SiO2 to SiC aerogel was investigated by different methods, such as X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and N 2 adsorption/desorption. The as-synthesized SiC aerogel presented typical mesoporous structure and possessed high porosity (91.8%), high surface area (328 m2/g) and large pore volume (2.28 cm3/g). Carbothermal reduction mechanism was also discussed based on the experiment and characterization results.",

keywords = "Carbothermal reduction, Microstructure, Silicon carbide, Sol-gel, Supercritical drying",

author = "Yong Kong and Xiaodong Shen and Sheng Cui and Maohong Fan",

year = "2014",

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doi = "10.1016/j.ceramint.2014.01.025",

language = "英语",

volume = "40",

pages = "8265--8271",

journal = "Ceramics International",

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TY - JOUR

T1 - Preparation of monolith SiC aerogel with high surface area and large pore volume and the structural evolution during the preparation

AU - Kong, Yong

AU - Shen, Xiaodong

AU - Cui, Sheng

AU - Fan, Maohong

PY - 2014/7

Y1 - 2014/7

N2 - Resorcinol-formaldehyde/silica composite (RF/SiO2) aerogel was synthesized by sol-gel process followed by supercritical drying (SCD). Monolithic SiC aerogel was obtained from RF/SiO2 aerogel after carbothermal reduction. The evolution of physical property, crystal structure, morphology and pore structure from RF/SiO2 to SiC aerogel was investigated by different methods, such as X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and N 2 adsorption/desorption. The as-synthesized SiC aerogel presented typical mesoporous structure and possessed high porosity (91.8%), high surface area (328 m2/g) and large pore volume (2.28 cm3/g). Carbothermal reduction mechanism was also discussed based on the experiment and characterization results.

AB - Resorcinol-formaldehyde/silica composite (RF/SiO2) aerogel was synthesized by sol-gel process followed by supercritical drying (SCD). Monolithic SiC aerogel was obtained from RF/SiO2 aerogel after carbothermal reduction. The evolution of physical property, crystal structure, morphology and pore structure from RF/SiO2 to SiC aerogel was investigated by different methods, such as X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and N 2 adsorption/desorption. The as-synthesized SiC aerogel presented typical mesoporous structure and possessed high porosity (91.8%), high surface area (328 m2/g) and large pore volume (2.28 cm3/g). Carbothermal reduction mechanism was also discussed based on the experiment and characterization results.

KW - Carbothermal reduction

KW - Microstructure

KW - Silicon carbide

KW - Sol-gel

KW - Supercritical drying

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U2 - 10.1016/j.ceramint.2014.01.025

DO - 10.1016/j.ceramint.2014.01.025

M3 - 文章

AN - SCOPUS:84897471977

SN - 0272-8842

VL - 40

SP - 8265

EP - 8271

JO - Ceramics International

JF - Ceramics International

IS - 6

ER -

Preparation of monolith SiC aerogel with high surface area and large pore volume and the structural evolution during the preparation

Abstract

Keywords

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