文献类型：期刊文献

英文题名：One-Step Arc-Produced Amino-Functionalized Graphite-Encapsulated Magnetic Nanoparticles for the Efficient Removal of Radionuclides

作者：Xiao, Jiang[1,2,3] Song, Wencheng[4] Hu, Rui[1,2] Chen, Lin[1,2] Tian, Xingyou[1,2]

第一作者：肖江;Xiao, Jiang

通信作者：Hu, R[1];Hu, R[2]

机构：[1]Chinese Acad Sci, Inst Appl Technol, Hefei Inst Phys Sci, Hefei 230088, Anhui, Peoples R China;[2]Chinese Acad Sci, CAS Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Anhui, Peoples R China;[3]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Zhejiang, Peoples R China;[4]Chinese Acad Sci, Ctr Med Phys & Technol, Hefei Inst Phys Sci, Anhui Prov Key Lab Med Phys & Technol, Hefei 230031, Anhui, Peoples R China

年份：2019

卷号：2

期号：1

起止页码：385-394

外文期刊名：ACS APPLIED NANO MATERIALS

收录：;EI(收录号：20193507364630);Scopus(收录号：2-s2.0-85070070604);WOS:【SCI-EXPANDED(收录号:WOS:000464491500042)】；

基金：This work was supported by the CAS Pioneer Hundred Talents Program, the CASHIPS Director's Fund (Grant No. YZJJ2018QN20), and the National Natural Science Foundation of China (No. 21875257).

语种：英文

外文关键词：graphite-encapsulated magnetic nanoparticles; one-step synthesis; surface amination; radionuclides; sorption

摘要：Graphite-encapsulated magnetic nanoparticles (GEMNPs) modified with highly concentrated nitrogen-containing species were synthesized via a one-step arc discharge. The NH3 added in the arc atmosphere dissociated H radicals to etch the graphite shells and incorporated four types of nitrogen-containing components into the surface networks (i.e., quaternary, pyrrolic, amino, and pyridinic N). The optimal amount of -NH2 distributed on the surface of each nanoparticle was 8.62 X 10(16) of amino groups (discharging condition: 0.1% of NH3 at 80 Torr). With a batch sorption technique, radionuclides could be efficiently captured by functionalized GEMNPs with sorption capabilities of 47.28 mg/g for U(VI), 45.48 mg/g for Th(IV), and 32.21 mg/g for Eu(III), respectively. The sorption capacities exhibited an excellent positive linearity with the number of nitrogen-containing species. Functionalized GEMNPs could also be recycled and used well even after five cycles of regeneration, exhibiting favorable potentials for the uptake of adionuclides in real management.