基于“蛋盒”结构海藻基超级活性炭的制备及电化学性能

Preparation and electrochemical properties of algae-based super activated carbon based on “egg-box” structure

与陆生植物不同,海藻中含有海藻酸和海藻酸盐,其中海藻酸盐主要以海藻酸钙、海藻酸镁等形式存在于细胞壁中。以马尾藻、浒苔、龙须菜、裙带菜、海带和石莼6种海藻为原料,对海藻炭化后得到的碳产物进行盐酸酸洗,除去海藻酸盐中的钙、镁等离子,形成“蛋盒”式初始孔结构,然后采用KOH活化法制备海藻基超级活性炭,研究酸洗预处理对海藻基活性炭孔结构特性以及电化学性能的影响。结果表明:对海藻炭化产物酸洗预处理,不仅明显增大了海藻基活性炭的比表面积,还大幅度提高了活性炭中介孔的含量。海藻基活性炭的电化学性能得到明显改善。

Different with terrestrial plants,algae contains alginic acid and alginate,and the alginate mainly exists in cell walls in the form of calcium alginate and magnesium alginate.Six kinds of algae,sargassum,enteromorpha,asparagus,undaria,kelp and ulva,were used as raw materials,carbon products from algae carbonization were pickled with hydrochloric acid to remove Ca 2+and Mg 2+ions,etc.from alginate and form“egg-box”initial pore structure.Then the algae-based super activated carbon was prepared by KOH activation method,the effect of pickling pretreatment on the pore structure and electrochemical properties of algae-based activated carbon was studied.The results show that the hydrochloric acid pretreatment can not only increase the specific surface area,but also improve the number of mesoporous of the algae-based activated carbons.The electrochemical performance of algae-based activated carbons is improved after hydrochloric acid pretreatment.