标题：Enhanced heterogeneous activation of peroxydisulfate by S, N co-doped graphene via controlling S, N functionalization for the catalytic decolorization of dyes in water
作者：Ren, Xiaohua; Feng, Jinkui; Si, Pengchao; Zhang, Lin; Lou, Jun; Ci, Lijie
作者机构：[Ren, Xiaohua; Feng, Jinkui; Si, Pengchao; Zhang, Lin; Lou, Jun; Ci, Lijie] Shandong Univ, Sch Mat Sci & Engn, Minist Educ, SDU & Rice Joint Ctr Carbo 更多
通讯作者：Ren, XH;Ci, LJ
通讯作者地址：[Ren, XH; Ci, LJ]Shandong Univ, Sch Mat Sci & Engn, Minist Educ, SDU & Rice Joint Ctr Carbon Nanomat,Key Lab Liqui, Jinan 250061, Shandong, Peoples R 更多
关键词：Heterogeneous activation; Sulfur and nitrogen co-doping; RhB; decolorization; Activation mechanism
摘要：3D porous sulfur and nitrogen co-doped graphene aerogel has been fabricated by a facile one-pot process. Both experimental and theoretical studies have demonstrated that sulfur and nitrogen co-doping could synergistically enhance the catalytic performance for activating peroxydisulfate (PDS) compared to the original and N doped graphene aerogels. The ratio of sulfur/nitrogen in the aerogel can be controlled by regulating the additions of thiourea and urea sources, and the aerogel with the S/N ratio of about 1:2.5 shows a better catalytic effect due to more significant changes in the electrostatic potential and the surface charge distribution, as revealed by the theoretical simulations. The radical quenching tests indicated that both SO4 center dot(- )and center dot OH radicals could be formed in the SN-rGO aerogel + PDS system and contribute most to RhB degradation. (C) 2018 Elsevier Ltd. All rights reserved.