| 崔冠男,刘仲齐,宋正国,多立安,高子平,尹洁,廉菲.一种氮杂化多孔炭材料的制备表征及其对染料的吸附性能研究[J].农业环境科学学报,2015,34(12):2372-2378. |
| 一种氮杂化多孔炭材料的制备表征及其对染料的吸附性能研究 |
| Preparation,Characterization,Dye Adsorption of a Novel N-doped Porous Carbon |
| 投稿时间：2015-08-15 |
| DOI：10.11654/jaes.2015.12.017 |
| 中文关键词: 秸秆 氮杂化炭材料 理化特性 酸性橙7 吸附性能 |
| 英文关键词: crop stalk N-doped carbon physicochemical property acid orange 7 adsorption capacity |
| 基金项目:中国农业科学院科技创新工程,中央级公益性科研院所基本科研业务费专项资金(农业部环境保护科研监测所);国家自然科学基金(41203083,41573127) |
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| 中文摘要: |
| 选用玉米秸秆为原料,氨气为活化剂,制备一种新型氮杂化多孔炭质吸附材料。利用比表面积测定仪、X射线光电子能谱仪、拉曼光谱和傅里叶红外光谱等技术,较系统地研究了该氮杂化炭材料的理化特性,并以常见染料酸性橙7为代表,探讨了其对染料的吸附性能。结果表明:当活化温度从600 ℃提高到800 ℃时,材料表面氮元素含量从3.2%增加到8.81%,比表面积从72.7 m2·g-1增加到418.7 m2·g-1,微孔率从16.2%增加到71.5%;同时,其对酸性橙7的吸附效率和吸附容量也显着提高,最大吸附量可达292 mg·g-1,优于常见的炭质吸附材料;等温吸附曲线符合Freundlich方程,为异质性表面的多层吸附过程,吸附机理主要以化学吸附为主。该氮杂化炭材料比表面积大、微孔结构发达、吸附能力强,具有较广阔的应用前景。 |
| 英文摘要: |
| A novel N-doped porous carbon was produced from corn stalks with NH3 gas as activator. Its characterization was investigated using N2 adsorption/desorption, X-ray photoelectron spectroscopy(XPS), Raman spectroscopy, and Fourier transform infrared spectroscopy(FTIR). Its adsorption of acid orange 7(AO7, as a model dye) was also examined.Results showed that increasing annealing temperature from 600 ℃ to 800 ℃ increased N content in the porous carbon from 3.2% to 8.81%, BET surface area from 72.7 m2·g-1 to 418.7 m2·g-1, and microporosity degree(ratio of Vm/Vt) from 16.0% to 71.5%. This porous carbon exhibited high dye adsorption capacity, with AO7 adsorption up to 292 mg·g-1, greater than that of many common carbonaceous adsorbents.The adsorption isotherms for AO7 could be well fitted by Freundlich model,implying that the dye adsorption probably occurred on heterogeneous surfaces in a multi-layer manner.The mechanisms of dye adsorption by the carbon were dominated by chemical interactions, probably including electrostatic attraction, π-π electron donor-accepter interaction, and Lewis acid-base interaction. These results demonstrate that the N-doped porous carbon has large BET surface area, well-developed microporosity and high adsorption capacity,thus exhibiting wide applications in various aspects. |
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