炭气凝胶的制备与吸附氢气性能

Synthesis and Hydrogen Adsorption of Carbon Aerogel Using Template

以氯化锌和聚丙烯酸作为前驱物,采用还原法,在一氧化碳和氮气的混合气体中,还原锌基复合气凝胶,成功制备出炭气凝胶。通过用场发射扫描电镜(FESEM)、射电子显微镜(HRTEM)和N2吸脱附测试对气凝胶的微观结构表征,结果表明:孔洞分布均匀,具有典型的三维空间网络结构,其比表面积为1 806 m2/g,孔径分布在2~30 nm。在常温下,压力在0.1~5 MPa范围内,测试了气凝胶的吸附氢气性能,发现该气凝胶具有较高的吸附氢气能力,压力达到5 MPa时,吸附能力最强,为0.29 wt.%。

In this study, we developed the innovation of carbon aerogel through thermal treatment in CO using ZnCl_2 and polyacrylic acid as templates, which employed the properties of high apparent specific surface areas. By adopting FESEM, HRTEM and N_2 adsorption/desorption, we learn that the carbon aerogel has a three-dimensional porous structure featuring high surface area(1 806 m^2/g), average pore diameter about 2~30 nm, which means the aerogel possesses the typical characteristic of mesopore. The pressurehydrogen adsorption isotherm of the monolithic carbon aerogel is in the pressure range of 0.1~5 MPa at 298 K. Furthermore, the monolithic carbon aerogel showed the maximum hydrogen adsorption capacity of 0.29 wt.% in the pressure of 5 MPa.