Au Nanofiber/CNT 1D/1D Composites Formed Via Redox Reaction at the Ionic Liquid/Water Interface

Ippei Koya; Tetsuo Sakka; Naoya Nishi

doi:10.1021/acs.langmuir.1c01433

Au Nanofiber/CNT 1D/1D Composites Formed Via Redox Reaction at the Ionic Liquid/Water Interface

Langmuir. 2021 Aug 10;37(31):9553-9559. doi: 10.1021/acs.langmuir.1c01433. Epub 2021 Jul 28.

Authors

Ippei Koya¹, Tetsuo Sakka¹, Naoya Nishi¹

Affiliation

¹ Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan.

PMID: 34319742
DOI: 10.1021/acs.langmuir.1c01433

Abstract

Au nanofiber/carbon nanotube (CNT) 1D/1D composites and Janus-type Au/CNT composites have been prepared by utilizing the liquid/liquid interface between water (W) and a hydrophobic ionic liquid (IL) as a redox reaction site. AuCl₄^- in W is reduced at the IL/W interface where CNTs are adsorbed, by a reducing agent in the IL, leading to the formation of the Au/CNT composites. The Au/CNT composites are Janus-type in which Au microurchins and Au nanofibers are deposited on the W side and the IL side of the CNTs on the IL/W interface, respectively. Reversing the order of the CNT adsorption and AuCl₄^- reduction results in the formation of the Au nanofiber/CNT composites, which are 1D/1D metal/carbon composites.