文献类型：期刊文献

英文题名：New insights into nanostructure/functionality-dependent catalysis of pollutants by arc-designing graphite-encapsulated silver nanoparticles

作者：Wang, Tianhui[1,2] Xiao, Jiang[3] Yang, Xiaoli[4] Zhao, Yonghui[1,2] Hu, Rui[1] Ding, Jianjun[1] Gong, Yi[1] Tian, Xingyou[1]

第一作者：Wang, Tianhui

通信作者：Hu, R[1]

机构：[1]Chinese Acad Sci, Inst Solid State Phys, Hefei Inst Phys Sci, Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Peoples R China;[2]Univ Sci & Technol China, Hefei 230026, Peoples R China;[3]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Peoples R China;[4]North China Univ Water Resources & Elect Power, Sch Environm & Municipal Engn, Zhengzhou 450045, Peoples R China

年份：2022

卷号：430

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20214111007016);Scopus(收录号：2-s2.0-85116640451);WOS:【SCI-EXPANDED(收录号:WOS:000729469100001)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 21875257). The authors would like to thank Dr. Xiang Meng from Chongqing University of Arts and Sciences for his helpful discussion.

语种：英文

外文关键词：Arc nanosynthesis; Nanostructure tailoring; Surface amination; Catalysis reduction; Efficient adsorption; Synergistic integration

摘要：Encapsulation of plasmonic nanoparticles in nanoshells is a promising strategy to overcome their oxidationcoalescence in the heterogeneous catalysis process. Tailoring of nanostructure/functionality to enable the efficient synergistic integration of core and shell is highly desired to enhance the plasmonic catalysis. This study applied a one-step arc discharge to design graphite-encapsulated silver (Ag@G) catalysts with tunable morphologies (14.3-46.9 nm of cores, 1.38-3.43 nm of shells) and surface functionalities (hydrophobization, or amination with maximum 2.70 x 1017/mg of Ag@G). Highly nanostructure/functionality-dependent catalysis of aquatic pollutants was established. Specifically, tailoring defective shells with thinner thickness enabled the efficient synergism of strong 7C-7C coordination of 4-nitrophenol and effective electron transfer of donors. Aminated Ag@G with ultrathin shells presented an optimal reduction for Cr(VI), establishing a negative relation of thickness with formic acid-induced reduction. Amino with proper densities (9.6-20.9/nm2) induced the capture of Cr(VI) ultrafast. Moreover, reductive N heteroatoms with proper densities (e.g., 27.7 of N/nm2) provided abundant lone pair electrons without the dramatic decline of conductivity, ensuring a favorable reduction of Cr (VI). Since arc discharge was versatile for the industrial production of nanomaterials, our work would trigger a new upsurge to arc-design nanostructures/functionalities for the catalysis and decontamination.