Yuan Xun, Zhuo Shu-Ping, Xing Wei, Cui Hong-You, Dai Xiao-Dong, Liu Xin-Mei, Yan Zi-Feng
School of Chemical Engineering, Shandong University of Technology, Zibo 255049, China.
J Colloid Interface Sci. 2007 Jun 1;310(1):83-9. doi: 10.1016/j.jcis.2007.01.069. Epub 2007 Feb 2.
Ordered mesoporous carbons (OMCs) with varying pore size, and microporous carbon, CFY, were synthesized using ordered mesoporous silica SBA-15 and NaY zeolite as hard templates, respectively. N(2) adsorption tests show that the synthesized OMCs possess abundant mesopores and centralized mesopore distribution. Methylene blue (MB) and neutral red (NR) were used as probe molecules to investigate their adsorption behaviors on OMCs and CFY. As evidenced by adsorption tests, the volume of mesopores of which the pore size is larger than 3.5 nm is a crucial factor for the adsorption capacity and adsorption rate of MB on OMCs. However, the most probable pore diameter of OMCs was found to be vital to the adsorption capacity and adsorption rate of NR. Theoretical studies show that the adsorption kinetics of MB and NR on OMCs can be well depicted by using pseudo-second-order kinetic model.
分别以有序介孔二氧化硅SBA - 15和NaY沸石为硬模板，合成了具有不同孔径的有序介孔碳（OMC）和微孔碳CFY。氮气吸附测试表明，合成的OMC具有丰富的介孔和集中的介孔分布。使用亚甲基蓝（MB）和中性红（NR）作为探针分子，研究它们在OMC和CFY上的吸附行为。吸附测试证明，孔径大于3.5 nm的介孔体积是影响MB在OMC上吸附容量和吸附速率的关键因素。然而，发现OMC的最可几孔径对NR的吸附容量和吸附速率至关重要。理论研究表明，MB和NR在OMC上的吸附动力学可以用伪二级动力学模型很好地描述。
