Synthesis and Characterization of Co-Mn (O)OH Nanosheets Assembled Structure Covered of Reduced Graphene Oxide Hybrid Structures by Hydrothermal Method

Sung Hoon Kwag; Young Hun Lee; Min Seob Kim; Chul Woo Lee; Seok Bin Kwon; Jung Hyeon Yoo; Bong Kyun Kang; Dae Ho Yoon

doi:10.1166/jnn.2019.16172

Synthesis and Characterization of Co-Mn (O)OH Nanosheets Assembled Structure Covered of Reduced Graphene Oxide Hybrid Structures by Hydrothermal Method

J Nanosci Nanotechnol. 2019 Mar 1;19(3):1609-1614. doi: 10.1166/jnn.2019.16172.

Authors

Sung Hoon Kwag¹, Young Hun Lee¹, Min Seob Kim¹, Chul Woo Lee¹, Seok Bin Kwon¹, Jung Hyeon Yoo¹, Bong Kyun Kang², Dae Ho Yoon¹

Affiliations

¹ School of Advanced Materials and Science and Engineering, Sungkyunkwan University, Suwon, 440-746, Republic of Korea.
² Nano Materials and Components Research Center, Korea Electronics Technology institute, 25, Saenari-ro, Bundang-gu, Seongnam-si, Gyeong gi-do 13509, Republic of Korea.

PMID: 30469231
DOI: 10.1166/jnn.2019.16172

Abstract

In this study, we prepared cobalt-manganese (oxy) hydroxide nanosheets assembled structure covered of reduced graphene oxide hybrid structure (Co-Mn (O)OH NAS@rGO HS) via reduction and hydroxylation of Mn_1.5Co_1.5[Co(CN)₆]₂@graphene oxide (GO). Obtained precursors were optimized at 15 mg GO, and these are hybrid structures in which nanocubes 200-400 nm in size were fully covered by multi-layered GO. The functional group (-COOH, -OH, C-O-C) of GO was removed through reduction by L-ascorbic acid. We obtained MnCOOH, Co(OH)₂, and Co-Mn LDH synthesized by hydroxylation of Mn_1.5Co_1.5[Co(CN)₆]₂@GO via ion exchange between the CN group and OH^-. The hybrid nanostructure between transition-metal oxide/hydroxide and reduced graphene oxide could be used in various fields, including lithium ion batteries, supercapacitors, and electrocatalyst for water splitting.