文献类型：期刊文献

英文题名：Rapid Synthesis of Porous Graphene Microspheres through a Three-Dimensionally Printed Inkjet Nozzle for Selective Pollutant Removal from Water

作者：Li, Dawei[1];Zhang, Hao[2];Zhang, Li[1];Wang, Panfeng[1];Xu, Hong[1];Xuan, Jin[2]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Loughborough Univ, Dept Chem Engn, Loughborough LE11 3TU, Leics, England

年份：2019

卷号：4

期号：24

起止页码：20509

外文期刊名：ACS OMEGA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000502130800012)】；

基金：The research presented in this paper is supported by the National Natural Science Foundation of China (no. 51776074), the Fundamental Research Funds for Central Universities (nos. 50321071917012 and 50321071918005), and the Royal Society in the U.K. via grant no. RSG \R1\180162.

语种：英文

摘要：Graphene microspheres are fabricated through a 3D-printed inkjet nozzle based on the gas-liquid microfluidic method. This method realizes rapid and controllable fabrication of uniform graphene microspheres with up to 800 mu L min(-1) (ca. 1 L d(-1)) of yields, which is 2 orders of magnitude higher than those of the conventional microfluidic method. The diameter of the graphene microspheres could be flexibly controlled from 0.5 to 3.5 mm by adjusting the gas pressure. The porous graphene microspheres show great dye decoloration performance. The maximum adsorption capacity of methylene blue is 596 mg/g, which is the highest adsorption capacity among that of the reduced graphene-oxide absorbents. A performance improvement of 21% is obtained by applying sodium alginate into graphene as a curing agent. The adsorption behavior follows a Langmuir isotherm and pseudo-second-order kinetic model. Besides, the graphene microspheres exhibit great selective adsorption and could separate cationic dye methylene blue (MB) and anionic dye methyl orange (MO).