文献类型：期刊文献

英文题名：Design and synthesis of pyrophosphate acid/graphene composites with wide stacked pores for methylene blue removal

作者：Wang, Chubei[1];Zhou, Jianwei[1];Ni, Jun[2];Cheng, Yuliang[3];Li, Hui[3]

通讯作者：Wang, CB[1]

机构：[1]Xinxiang Univ, Inst Energy & Fuel, Xinxiang 453003, Henan, Peoples R China;[2]Fuzhou Univ, Natl Engn Res Ctr Chem Fertilizer Catalyst, Fuzhou 350002, Fujian, Peoples R China;[3]Xinxiang Univ, Dept Life Sci & Technol, Xinxiang 453003, Henan, Peoples R China

第一机构：新乡学院化学化工学院

通讯机构：[1]corresponding author), Xinxiang Univ, Inst Energy & Fuel, Xinxiang 453003, Henan, Peoples R China.|[110713]新乡学院化学化工学院;[11071]新乡学院;

年份：2014

卷号：253

起止页码：130-137

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20142317792948);Scopus(收录号：2-s2.0-84901633283);WOS:【SCI-EXPANDED(收录号:WOS:000340213600016)】；

基金：This work was supported by the Education Department of Henan Province (No. 128210022), the Science and Technology Bureau of Xinxiang (No. 13SF39), and the Funds of Xinxiang University (Nos. 12ZB09 and 12ZB10).

语种：英文

外文关键词：Graphene; Porosity; Adsorption; Methylene blue

摘要：Pyrophosphate acid/graphene composites were prepared by using graphite oxide and phosphorus trichloride as raw materials. Phosphorus-based groups and residual oxygenated functional groups may reduce graphene sheet restacking to form graphite. The stacked pore size and binding site of the composites are noticeably improved by aggregation of functionalized sheets. The average interlayer spacing of the composites is wider than that of reduced graphene oxide (RGO). Compared with the high surface area of the adsorbent, the porosity and pore size of the materials exert significantly greater influence on the adsorption capacity of the composites. The adsorption process follows second-order rate. The adsorption of methylene blue preferably fitting the Langmuir adsorption isotherm suggests monolayer coverage of adsorbed molecules. The adsorption capacity of the composites for methylene blue is 200.0 mg g(-1), which is significantly higher than those of RGO (80.0 mg g(-1)) and active carbon (46.7 mg g(-1)). (C) 2014 Elsevier B.V. All rights reserved.