Direct synthesis of nano/micro co-porous Ni/NiO composite powders using EDA and mild heat treatment

Title
Direct synthesis of nano/micro co-porous Ni/NiO composite powders using EDA and mild heat treatment
Author(s)
강미숙김지은최병현[최병현]
Keywords
ION BATTERIES; NIO; ANODE; PERFORMANCE; NANOWIRES; CATALYSTS; CELLS
Issue Date
201311
Publisher
ELSEVIER SCIENCE BV
Citation
POWDER TECHNOLOGY, v.249, pp.419 - 423
Abstract
This paper reports a simple method to prepare Ni/NiO powders containing nano- and micro-sized pores using ethylenediamine (EDA or en) as a chelating agent. Ni-ethylenediamine complexes were synthesized hydrothermally using nickel (II) nitrate as a Ni precursor and a bidentate chelating reagent, EDA, at various molar ratios (nickel precursor: EDA = 1.0:1.0 1.0:2.0,1.0:3.0, and 1.0:4.0). X-ray diffraction and scanning electron microscopy showed that the produced powders were Ni/NiO composites containing nano- and micro-pores with two distinct pore size ranges, 100-300 nm and 1.0-2.0 mu m. The adsorption-desorption isotherm curves revealed a certain hysteresis slope at intermediate and high relative pressures. This indicates the presence of large pores, which were shown by variations in the mean pore diameter (D-p); 6.57, 11.61, 12.41, and 15.478 nm for Nienl, Nien2, Nien3 and Nien4 corresponding to an EDA: Ni precursor molar ratio of 1.0, 2.0, 3.0 and 4.0, respectively. The specific surface areas and total pore volumes for the Nien1, Nien2, Nien3, and Nien4 were 20.4, 41.21, 50.60 and 27.64 m(2) g(-1), respectively. (C) 2013 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/28504http://dx.doi.org/10.1016/j.powtec.2013.09.008
ISSN
0032-5910
Appears in Collections:
이과대학 > 화학생화학부 > Articles
문과대학 > 중국언어문화학과 > Articles
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