Fundamental nature and CO oxidation activities of indium oxide nanostructures: 1D-wires, 2D-plates, and 3D-cubes and donuts

Title
Fundamental nature and CO oxidation activities of indium oxide nanostructures: 1D-wires, 2D-plates, and 3D-cubes and donuts
Author(s)
손영구김원주D. Pradhan[D. Pradhan]
Keywords
DIAMETER-CONTROLLED GROWTH; IN2O3 NANOROD BUNDLES; CORUNDUM-TYPE IN2O3; PHOTOLUMINESCENCE PROPERTIES; PHOTOCATALYTIC PROPERTIES; HYDROTHERMAL SYNTHESIS; CONTROLLABLE SYNTHESIS; AMBIENT-PRESSURE; IN(OH)(3); NANOCUBES
Issue Date
201309
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v.1, no.35, pp.10193 - 10202
Abstract
Various indium oxide nanostructures of 1D-wires, 2D-hexagonal plates, 3D-cubes and donuts were synthesized, and their fundamental characteristics and CO oxidation activities were studied in detail. X-ray diffraction and Raman analysis revealed that the as-synthesized wires and cubes are orthorhombic InOOH and cubic In(OH)(3), respectively. Upon annealing at 700 degrees C in air, all the as-prepared samples were recrystallized to cubic In2O3. The direct band gap of various as-synthesized nanostructures was estimated to be similar to 2.7 eV from the UV-Vis absorption. Two broad photoluminescence peaks were found at 360 and 450 nm, which are attributed to the oxygen vacancies. The CO oxidation activities were in the order of hexagonal plates <= donuts < cubes < wires, tested by temperature-programmed reaction mass spectrometry. The difference in activity is explained on the basis of the surface area and oxygen vacancies of different nanostructures. In particular, the wires showed the CO oxidation onset at around 320 degrees C, which is 280 degrees C lower than that of hexagonal plates. The detailed morphology dependent properties and CO oxidation activities of various In2O3 nanostructures presented in this study provide new insights into sensor, energy, and environmental applications.
URI
http://hdl.handle.net/YU.REPOSITORY/29001http://dx.doi.org/10.1039/c3ta12312j
ISSN
2050-7488
Appears in Collections:
이과대학 > 화학생화학부 > Articles
문과대학 > 중국언어문화학과 > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE