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Nitrogen-Doped Hierarchical Porous Biochar Derived from Corn Stalks for Phenol-Enhanced Adsorption
Energy & Fuels ( IF 5.2 ) Pub Date : 2019-11-18 , DOI: 10.1021/acs.energyfuels.9b02924 Yunchao Li 1 , Bo Xing 1 , Xiaoliu Wang 1 , Kaige Wang 1 , Lingjun Zhu 1 , Shurong Wang 1
Energy & Fuels ( IF 5.2 ) Pub Date : 2019-11-18 , DOI: 10.1021/acs.energyfuels.9b02924 Yunchao Li 1 , Bo Xing 1 , Xiaoliu Wang 1 , Kaige Wang 1 , Lingjun Zhu 1 , Shurong Wang 1
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Nitrogen-doped hierarchical porous biochar has aroused great interest in energy storage and adsorption applications. In this study, nitrogen-doped hierarchical porous biochar was prepared from corn stalks by in situ pyrolysis with urea as the nitrogen source and NaHCO3 as the green activation agent. The liquid adsorption behavior of biochar was evaluated using phenol as a pollutant probe. The results showed that urea had a synergistic effect on the pore structure development of biochar in the presence of an activation agent. The addition of urea especially promoted the formation of micropores. X-ray photoelectron spectroscopy results showed that nitrogen atoms were successfully introduced into the skeleton of biochar in the form of different nitrogen species, which promote the adsorption of phenol. The phenol adsorption was dominated by micropore filling, and the adsorption capacity was positively correlated with the content of graphitic N. The nitrogen-doped biochar obtained at 700 °C with a moderate surface area and a high content of graphite type N exhibited the highest adsorption capacity of phenol. The kinetic analysis also indicates the existence of chemical interactions in the adsorption process.
中文翻译：
玉米秸秆中掺氮的分层多孔生物炭对苯酚的吸附作用
氮掺杂的分级多孔生物炭引起了人们对能量存储和吸附应用的极大兴趣。本研究以玉米秸秆为原料，以尿素为氮源和NaHCO 3进行原位热解制备了氮杂多级多孔生物炭。作为绿色活化剂。使用苯酚作为污染物探针评估生物炭的液体吸附行为。结果表明，在存在活化剂的情况下，尿素对生物炭的孔结构发展具有协同作用。尿素的添加尤其促进了微孔的形成。X射线光电子能谱分析结果表明，氮原子以不同的氮形态成功地引入了生物炭的骨架中，促进了苯酚的吸附。苯酚的吸附以微孔填充为主，吸附能力与石墨态氮的含量呈正相关。在700°C下得到的氮掺杂生物炭具有中等的表面积和高含量的N型石墨，表现出最高的吸附性。苯酚的容量。
更新日期：2019-11-18
中文翻译：
玉米秸秆中掺氮的分层多孔生物炭对苯酚的吸附作用
氮掺杂的分级多孔生物炭引起了人们对能量存储和吸附应用的极大兴趣。本研究以玉米秸秆为原料，以尿素为氮源和NaHCO 3进行原位热解制备了氮杂多级多孔生物炭。作为绿色活化剂。使用苯酚作为污染物探针评估生物炭的液体吸附行为。结果表明，在存在活化剂的情况下，尿素对生物炭的孔结构发展具有协同作用。尿素的添加尤其促进了微孔的形成。X射线光电子能谱分析结果表明，氮原子以不同的氮形态成功地引入了生物炭的骨架中，促进了苯酚的吸附。苯酚的吸附以微孔填充为主，吸附能力与石墨态氮的含量呈正相关。在700°C下得到的氮掺杂生物炭具有中等的表面积和高含量的N型石墨，表现出最高的吸附性。苯酚的容量。
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