Nanospace-enhanced photoreduction for the synthesis of copper(I) oxide nanoparticles under visible-light irradiation

Takahiro Ohkubo; Mitsuhiro Ushio; Koki Urita; Isamu Moriguchi; Bashir Ahmmad; Atsushi Itadani; Yasushige Kuroda

doi:10.1016/j.jcis.2014.01.035

Nanospace-enhanced photoreduction for the synthesis of copper(I) oxide nanoparticles under visible-light irradiation

J Colloid Interface Sci. 2014 May 1:421:165-9. doi: 10.1016/j.jcis.2014.01.035. Epub 2014 Feb 4.

Authors

Takahiro Ohkubo¹, Mitsuhiro Ushio², Koki Urita³, Isamu Moriguchi³, Bashir Ahmmad⁴, Atsushi Itadani⁵, Yasushige Kuroda²

Affiliations

¹ Department of Chemistry, Faculty of Science, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan. Electronic address: ohkubo@okayama-u.ac.jp.
² Department of Chemistry, Faculty of Science, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan.
³ Division of Chemistry and Material Science, Graduate School of Engineering, Nagasaki University, 1-14 Bunkyomachi, Nagasaki 852-8521, Japan.
⁴ Graduate School of Science and Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan.
⁵ Department of Chemistry, Faculty of Science, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan; Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Yoshidaushinomiyacho, Sakyou-ku, Kyoto 606-8501, Japan.

PMID: 24594046
DOI: 10.1016/j.jcis.2014.01.035

Abstract

Nanoparticles of copper(I) oxide (cuprous oxide; Cu2O) were able to be synthesized from nano-restricted copper acetate (Cu(OAc)2) in micropores of single-wall carbon nanotubes (SWNTs) by visible-light photoreduction. The specific structure of confined Cu(OAc)2 in the micropore is indispensable for the reduction process to Cu2O by the irradiation, because, in general, aqueous solution of Cu(OAc)2 can be reduced under UV-light irradiated conditions. The present results strongly suggest that the micropore of SWNTs whose pore width is in the micropore-size range can play as nanoreactor space for the synthesis of Cu2O through the nano-restricted precursor whose reactivity is different from that in the bulk phase.

Keywords: Adsorption; Cuprous oxide (Cu(2)O); Nanoparticle; Photoreduction; Single-wall carbon nanotube; XAFS.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Copper / chemistry*
Light*
Metal Nanoparticles*
Microscopy, Electron, Transmission
Nanotechnology*
Oxidation-Reduction
Photochemical Processes*
Powder Diffraction
X-Ray Absorption Spectroscopy

Substances

Copper
cuprous oxide