Enhanced CO2 Adsorption on Activated Carbon-Modified HKUST-1 Composites
Enhanced CO2 Adsorption on Activated Carbon-Modified HKUST-1 Composites
复制标题
活性炭改性 HKUST-1 复合材料增强 CO2 吸附
DOI：
10.1002/slct.201802443
复制
发表时间：
2018
期刊：
影响因子：
2.1
通讯作者：
Chen Bing
中科院分区：
文献类型：
--
作者：
Zeng Ganning;Yu Zaohong;Du Mingming;Ai Ning;Chen Wenxian;Gu Zhengrong;Chen Bing
制备了不同AC含量的介孔活性炭（AC）改性HKUST-1复合材料，并将其用于CO2吸附。采用扫描电子显微镜（SEM）、X射线衍射仪（XRD）、热重分析（TG）和氮气吸附等方法对复合材料的结构和理化性能进行了表征。结果表明，与HKUST-1相比，HKUST-1@AC复合材料的比表面积和微孔体积明显增加。其中HKUST-1@AC/2%的最大比表面积为1145.71 m2/g，最大吸附体积为0.4363 mL/g，最大CO2吸附容量为155.7 mg/g，是未改性HKUST-1的近2倍。活性炭中含氧官能团的含量对HKUST-1@AC/2%复合材料的CO2吸附也有重要影响，椰壳活性炭的最佳含氧官能团含量约为2.9 mg/g。这可能是由于HKUST-1沿着富含含氧官能团的活性炭表面生长，在两界面之间形成大量微孔，从而增加了CO2的吸附量。
Mesoporous activated carbon (AC)‐modified HKUST‐1 composites with different AC contents were prepared and were used for CO2adsorption. The structure and physiochemical properties of the composites were characterized by scanning electron microscopy(SEM), X‐ray diffractometer(XRD), thermogravimetry(TG) and nitrogen adsorption techniques. The results showed that the surface area and micro pore volume for the HKUST‐1@AC composites increase obviously compared to the HKUST‐1. Especially, the HKUST‐1@AC/2% gave the maximum specific surface area of 1145.71 m2/g and micropore volume of 0.4363 mL/g, resulting in highest CO2adsorption capacity of 155.7 mg/g, which is almost two times than that of the unmodified HKUST‐1. The content of oxygen‐containing functional groups in AC also play an important role in CO2adsorption for the HKUST‐1@AC/2% composites, and the optimum content of oxygen‐containing functional groups for the coconut shell AC is about 2.9 mg/g. This might be due to that HKUST‐1 grows along the surface of AC with rich oxygen‐containing functional groups, and a large number of micropores are formed between the two interfaces, therefore increasing CO2adsorption amount.