A general approach to homogeneous sub-nanometer metallic particle/graphene composites by S-coordinator. (May 2018)

• Record Type: Journal Article
• Authors: Wang, Senhao; Wang, Wei; Gu, Shangzhi; Zhang, Guoxin; Song, Ningning
• Is Part Of: Solid state communications. Volume 273(2018)
• Page Start: 17
• Page End: 22
• Publication Date: 2018-05
• Subjects: S-coordinator -- Metallic particle -- Nanocomposite -- Preparation method; Solid state chemistry -- Periodicals; Solid state physics -- Periodicals; Chimie de l'état solide -- Périodiques; Physique de l'état solide -- Périodiques; 530.41
• DOI: 10.1016/j.ssc.2018.02.007
• Languages: English
• ISSNs: 0038-1098

Abstract

Abstract: In this study, sulphur-modified reduced graphene oxide (S-rGO) was employed as substrate to investigate the growth mechanism of metal and metallic nanoparticles (NPs). It is observed that the monodispersed Au, SnO2, FeO(OH) and Co3 S4 NPs in sub-nanometer (sub-nm) with narrow size distribution were successfully anchored on S-rGO, respectively. The results indicate that the S contained radicals, viz. the CS and CSC functional groups play an important role in determining the homogeneous distribution of NPs on S-rGO by providing active sites for the NPs anchoring and nucleation. In additional, as anode materials for lithium ion batteries (LIBs), the as-synthesized sub-nm sized Co3 S4 /S-rGO and SnO2 /S-rGO composites show excellent Li storage performance. It could be stabilized at ca. 600 mAh/g after formation cycle with the coulombic efficiency of 98%. It is expected that the strategy of growing sub-nm sized metallic component onto graphene by applying sulphur functionalities could be utilized as a general method to prepare monodispersed graphene-based NPs with other metals, especially with transition metals in sub-nm sizes. Highlights: Monodispersed Au, SnO2, FeO(OH) and Co3 S4 NPs in sub-nanometer (sub-nm) were successfully anchored on S-rGO, respectively. The growth mechanism of metal and metallic nanoparticles (NPs) was investigated in this manuscript. As anode materials for lithium ion batteries, the Co3 S4 /S-rGO and SnO2 /S-rGO show excellent Li storage performance.