A novel porous carbon derived from hydrothermal carbon for efficient adsorption of tetracycline
A novel porous carbon derived from hydrothermal carbon for efficient adsorption of tetracycline
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DOI：
10.1016/j.carbon.2014.05.067
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发表时间：
2014-10
期刊：
影响因子：
10.9
通讯作者：
Xiangdong Zhu;Yuchen Liu;Chao Zhou;G. Luo;Shicheng Zhang;Jianmin Chen
中科院分区：
文献类型：
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作者：
Xiangdong Zhu;Yuchen Liu;Chao Zhou;G. Luo;Shicheng Zhang;Jianmin Chen
由于能源短缺、环境危机和客户需求的不断发展，废弃生物质的水热碳化(HTC)越来越受到重视。然而，大多数研究都致力于生物油的生产，很少有研究侧重于水热碳(加氢焦)的应用，水热碳是生物质HTC的固体残留物。以加氢半焦为原料，在不同温度(300~700℃)下热解制备了一种新型多孔炭，考察了其性能及对四环素(TC)的吸附行为。用Boehm滴定、傅里叶变换红外光谱和核磁共振光谱对加氢焦和聚碳酸酯样品的表面性质进行了表征。性能的变化表明，在较高的活化温度(500-700℃)下制备的PC样品碳化良好，具有较高的比表面积(>；270×m~2/g)。Freundlich吸附容量(KF)与元素原子比、比表面积和孔体积之间存在线性关系。PC样品的高吸附容量归因于其低极性、高芳香度、高比表面积和高孔容。加氢焦样和聚碳酸酯样品之间的分子差异转化为它们对TC的吸附能力的差异。
Increasing attention is being paid to hydrothermal carbonization (HTC) of waste biomass, due to energy shortages, environmental crises and developing customer demands. However, most research has been dedicated to the production of bio-oil, with few studies focusing on the application of hydrothermal carbon (hydrochar), a solid residue from HTC of biomass. In this study, a novel porous carbon (PC) was prepared from hydrochar, via pyrolysis at different temperatures (300–700 °C), the characteristics of PC as well as tetracycline (TC) adsorption behavior were investigated. The hydrochar and PC samples showed a remarkable range of surface properties, as characterized by Boehm titration, the Fourier transform infrared spectra and nuclear magnetic resonance spectra. The changes in characteristics suggested that the PC samples produced at high activation temperature (500–700 °C) were well carbonized and exhibited a high surface area (>270 m2/g). Linear relationships were obtained between Freundlich adsorptive capacity (KF) and elemental atomic ratios, surface area and pore volume. The high adsorption capacity of PC samples can be attributed to its low polarity and high aromaticity, surface area and pore volume. The molecular variations among the hydrochar and PC samples translated into differences in their ability to adsorb TC.