期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Preparation of Expanded Graphite-based Composites by One Step Impregnation 被引量:4
1
作者 刘成宝 陈志刚 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2011年第2期254-257,共4页
A new method for preparing expanded graphite-based composites (EGCs) was developed.The obtained samples were characterized by scanning electron microscopy (SEM),transmission electron microscope (TEM) and nitroge... A new method for preparing expanded graphite-based composites (EGCs) was developed.The obtained samples were characterized by scanning electron microscopy (SEM),transmission electron microscope (TEM) and nitrogen adsorption.The experimental results indicated that the EGCs was not simply mechanical mixture of EG and activated carbon,instead the activated carbon was coated on the surface of interior and external pores of the EG in the form of thin carbon layer.The thickness of the activated carbon layer was nearly one hundred nanometers by calculation.It was shown that the higher the impregnation ratio and the activation temperature were,the easier the porosity development would be.And the BET surface area and the total pore volume were as high as 1978 m2/g and 0.9917 cm3/g respectively at 350℃ with an impregnation ratio of 0.9. 展开更多
关键词 expanded graphite expanded graphite-based composites h3po4 activation pore structure
下载PDF
Preparation of activated carbon from cattail and its application for dyes removal 被引量:13
2
作者 Qianqian Shi Jian Zhang +5 位作者 Chenglu Zhang Cong Li Bo Zhang Weiwei Hu Jingtao Xu Ran Zhao 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2010年第1期91-97,共7页
Activated carbon was prepared from cattail by H3PO4 activation. The effects influencing the surface area of the resulting activated carbon followed the sequence of activated temperature 〉 activated time 〉 impregnati... Activated carbon was prepared from cattail by H3PO4 activation. The effects influencing the surface area of the resulting activated carbon followed the sequence of activated temperature 〉 activated time 〉 impregnation ratio 〉 impregnation time. The optimum condition was found at an impregnation ratio of 2.5, an impregnation time of 9 hr, an activated temperature of 500℃, and an activated time of 80 min. The Brunauer-Emmett-Teller surface area and average pore size of the activated carbon were 1279 m^2/g and 5.585 nm, respectively. A heterogeneous structure in terms of both size and shape was highly developed and widely distributed on the carbon surface. Some groups containing oxygen and phosphorus were formed, and the carboxyl group was the major oxygen-containing functional group. An isotherm equilibrium study was carried out to investigate the adsorption capacity of the activated carbon. The data fit the Langmuir isotherm equation, with maximum monolayer adsorption capacities of 192.30 mg/g for Neutral Red and 196.08 mg/g for Malachite Green. Dye-exhausted carbon could be regenerated effectively by thermal treatment. The results indicated that cattail-derived activated carbon was a promising adsorbent for the removal of cationic dyes from aqueous solutions. 展开更多
关键词 CATTAIL activated carbon h3po4 activation dyes removal REGENERATION
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部