羧酸功能化纳米碳包覆凹凸棒石材料的制备及其吸附应用研究

Synthesis of Carboxylate-Rich Carbonaceous Coated Attapulgite(ATP)Materials and the Application of Absorbing Toxic Heavy Metal Ions

在丙烯酸和葡萄糖存在的条件下,通过水热合成方法在凹凸棒石表面成功包覆了富含羧酸官能团的纳米碳质结构。并通过氮气吸附-脱附(N2adsorption-desorption isotherms);红外光谱(FT-IR);扫描电镜(SEM);透射电镜(TEM);核磁共振(13C solid-state NMR)等方法对合成的材料进行了全面的表征。表征结果说明本方法是一种廉价、简单、绿色的功能化碳纳米材料的合成方法。将合成的羧酸功能化碳包覆凹凸棒材料作为吸附剂对水体中的重金属元素进行吸附行为研究,并通过相关的吸附模型对吸附行为进行了模拟和探讨。

The carboxylate-rich carbonaceous coated attapulgite materials were synthesized using hydrother- mal carbonization of glucose in the presence of acrylic acid. The resulting materials were characterized using various methods including, N2 adsorption-desorption isotherms, FT-IR, SEM, TEM, and 13C solid- state NMR. The characterization results indicate that the used method provides a low-cost, easy control, and ＂green＂ access to hydrophilic functionalized carbons coated attapulgite materials. The obtained carbox- ylate-rich carbonaceous coated attapulgite materials were used as adsorbents for heavy metals removal from aqueous solutions.