Synthesis of carbon nanofiber/carbon-foam composite for catalyst support in gas-phase catalytic reactions
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摘要: 以中间相沥青为碳质前躯体,采用自发泡法制得泡沫炭。为了提高比表面积,泡沫炭经质量分数65%的HNO3氧化后,采用化学气相沉积法在其表面生长一层纳米炭纤维(CNFs)。泡沫炭表面生长一层CNFs后,其比表面积和导热系数分别由40m2/g、107W/mK相应提高到198m2/g、125W/mK。这种结构的CNFs/泡沫炭复合材料可以用作气相催化反应体系的催化剂载体。Abstract: A carbon foam was prepared by self-bubbling using mesophase pitch as a precursor. To improve its specific surface area, the carbon foam was oxidized with 65 mass% HNO3, and then a layer of carbon nanofibers (CNFs) was grown on the pore walls using chemical vapor deposition. The specific surface area and thermal conductivity of the carbon foam and CNF/carbon foam composite are 40 and 198m2/g and 107 and 125W/mK, respectively. This CNF/carbon-foam composite can be used as a catalyst support for gas-phase catalytic reactions.
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Key words:
- Carbon foam /
- Carbon nanofiber /
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Catalyst support
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