常温合成硫掺杂微孔碳及其二氧化碳的吸附性能
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摘要
常温下以间苯三酚和3-甲醛苯并噻吩作为原料,一步法合成了含硫酚醛树脂。在氩气保护下碳化,成功制备出了硫掺杂多孔碳(S-PC)。并利用扫描电镜(SEM)、X射线光电子能谱(XPS)、X射线衍射(XRD)和氮气吸附-脱附仪对材料进行了形貌、结构和性能的表征。实验结果表明,所得样品具有较高比表面积和大量的微孔,经过调控,可以使制备的硫掺杂多孔碳的BET比表面积达到997 m2·g~(-1),并使其微孔孔体积达到0.44 cm3·g~(-1)。得益于较高的比表面积以及其富含微孔的特性,当材料应用于二氧化碳吸附时,具有较高的CO2吸附量,在273和298 K时分别高达5.13,3.22 mmol·g~(-1),并具有良好的选择性。
Sulfur doped porous carbon(S-PC) were obtained by direct carbonization of sulfur containing phenolic resins, which were synthesized through one step reaction between phloroglucinol and benzo [b]thiophenc-3-carboxaldehyde under room temperature. The material was characterized by scanning electron microscope(SEM),X-ray photoelectron spectroscopy(XPS), X-ray diffraction(XRD) and N2 sorption-desorption experiments. The obtained porous carbons possess high surface area with abundant of micropores. What ′s more, ultra-high surface area of 997 m2·g~(-1) along with ultra-large micropore volume of 0.44 cm3·g~(-1) could be obtained after carefully regulation the concentration of reactants. Owing to these fascinating characters like high surface area and rich of micropores, both high CO_2 uptake capacity( 5.13 and 3.22 mmol·g~(-1) for 273 and 298 K respectively) and high selectivity was obtained, which indicating it′s promising sorbents for CO_2.
Sulfur doped porous carbon(S-PC) were obtained by direct carbonization of sulfur containing phenolic resins, which were synthesized through one step reaction between phloroglucinol and benzo [b]thiophenc-3-carboxaldehyde under room temperature. The material was characterized by scanning electron microscope(SEM),X-ray photoelectron spectroscopy(XPS), X-ray diffraction(XRD) and N2 sorption-desorption experiments. The obtained porous carbons possess high surface area with abundant of micropores. What ′s more, ultra-high surface area of 997 m2·g~(-1) along with ultra-large micropore volume of 0.44 cm3·g~(-1) could be obtained after carefully regulation the concentration of reactants. Owing to these fascinating characters like high surface area and rich of micropores, both high CO_2 uptake capacity( 5.13 and 3.22 mmol·g~(-1) for 273 and 298 K respectively) and high selectivity was obtained, which indicating it′s promising sorbents for CO_2.
引文
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